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- // Copyright (c) 2004-2010 Sergey Lyubka
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy
- // of this software and associated documentation files (the "Software"), to deal
- // in the Software without restriction, including without limitation the rights
- // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the Software is
- // furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in
- // all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- // THE SOFTWARE.
- #if defined(__FreeBSD__)
- #include <sys/socket.h>
- #endif
- #if defined(_WIN32)
- #define _WINSOCK_DEPRECATED_NO_WARNINGS
- #else
- #define _XOPEN_SOURCE 600 // For flockfile() on Linux
- #define _LARGEFILE_SOURCE // Enable 64-bit file offsets
- #define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
- #endif
- #if defined(__SYMBIAN32__)
- #define NO_SSL // SSL is not supported
- #define NO_CGI // CGI is not supported
- #define PATH_MAX FILENAME_MAX
- #endif // __SYMBIAN32__
- #ifndef _WIN32
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <errno.h>
- #include <signal.h>
- #include <fcntl.h>
- #endif // !_WIN32
- #include <time.h>
- #include <stdlib.h>
- #include <stdarg.h>
- #include <assert.h>
- #include <string.h>
- #include <ctype.h>
- #include <limits.h>
- #include <stddef.h>
- #include <stdio.h>
- #if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
- #define _WIN32_WINNT 0x0400 // To make it link in VS2005
- #include <windows.h>
- #ifndef PATH_MAX
- #define PATH_MAX MAX_PATH
- #endif
- #ifndef _WIN32
- #include <process.h>
- #include <direct.h>
- #else // _WIN32
- #include <winsock2.h>
- #include <io.h>
- #include <fcntl.h>
- typedef long off_t;
- #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
- #endif // _WIN32
- #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
- ((uint64_t)((uint32_t)(hi))) << 32))
- #define RATE_DIFF 10000000 // 100 nsecs
- #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
- #define SYS2UNIX_TIME(lo, hi) \
- (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
- // Visual Studio 6 does not know __func__ or __FUNCTION__
- // The rest of MS compilers use __FUNCTION__, not C99 __func__
- // Also use _strtoui64 on modern M$ compilers
- #if defined(_MSC_VER) && _MSC_VER < 1300
- #define STRX(x) #x
- #define STR(x) STRX(x)
- #define __func__ "line " STR(__LINE__)
- #define strtoull(x, y, z) strtoul(x, y, z)
- #define strtoll(x, y, z) strtol(x, y, z)
- #else
- #define __func__ __FUNCTION__
- #define strtoull(x, y, z) _strtoui64(x, y, z)
- #define strtoll(x, y, z) _strtoi64(x, y, z)
- #endif // _MSC_VER
- #define ERRNO GetLastError()
- #define NO_SOCKLEN_T
- #define SSL_LIB "ssleay32.dll"
- #define CRYPTO_LIB "libeay32.dll"
- #define DIRSEP '\\'
- #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
- #define O_NONBLOCK 0
- #if !defined(EWOULDBLOCK)
- #define EWOULDBLOCK WSAEWOULDBLOCK
- #endif // !EWOULDBLOCK
- #define _POSIX_
- #define INT64_FMT "I64d"
- #define WINCDECL __cdecl
- #define SHUT_WR 1
- #define snprintf _snprintf
- #define vsnprintf _vsnprintf
- #define sleep(x) Sleep((x) * 1000)
- #define pipe(x) _pipe(x, BUFSIZ, _O_BINARY)
- #define popen(x, y) _popen(x, y)
- #define pclose(x) _pclose(x)
- #define close(x) _close(x)
- #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
- #define RTLD_LAZY 0
- #define fseeko(x, y, z) fseek((x), (y), (z))
- #define fdopen(x, y) _fdopen((x), (y))
- #define write(x, y, z) _write((x), (y), (unsigned) z)
- #define read(x, y, z) _read((x), (y), (unsigned) z)
- #define flockfile(x) (void) 0
- #define funlockfile(x) (void) 0
- #if !defined(fileno)
- #define fileno(x) _fileno(x)
- #endif // !fileno MINGW #defines fileno
- typedef HANDLE pthread_mutex_t;
- typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
- typedef DWORD pthread_t;
- #define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
- struct timespec {
- long tv_nsec;
- long tv_sec;
- };
- static int pthread_mutex_lock(pthread_mutex_t *);
- static int pthread_mutex_unlock(pthread_mutex_t *);
- static FILE *mg_fopen(const char *path, const char *mode);
- #if defined(HAVE_STDINT)
- #include <stdint.h>
- #else
- typedef unsigned int uint32_t;
- typedef unsigned short uint16_t;
- typedef unsigned __int64 uint64_t;
- typedef __int64 int64_t;
- #define INT64_MAX 9223372036854775807
- #endif // HAVE_STDINT
- // POSIX dirent interface
- struct dirent {
- char d_name[PATH_MAX];
- };
- typedef struct DIR {
- HANDLE handle;
- WIN32_FIND_DATAW info;
- struct dirent result;
- } DIR;
- #else // UNIX specific
- #include <sys/wait.h>
- #include <sys/socket.h>
- #include <sys/select.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <sys/time.h>
- #include <stdint.h>
- #include <inttypes.h>
- #include <netdb.h>
- #include <pwd.h>
- #include <unistd.h>
- #include <dirent.h>
- #if !defined(NO_SSL_DL) && !defined(NO_SSL)
- #include <dlfcn.h>
- #endif
- #include <pthread.h>
- #if defined(__MACH__)
- #define SSL_LIB "libssl.dylib"
- #define CRYPTO_LIB "libcrypto.dylib"
- #else
- #if !defined(SSL_LIB)
- #define SSL_LIB "libssl.so"
- #endif
- #if !defined(CRYPTO_LIB)
- #define CRYPTO_LIB "libcrypto.so"
- #endif
- #endif
- #define DIRSEP '/'
- #define IS_DIRSEP_CHAR(c) ((c) == '/')
- #ifndef O_BINARY
- #define O_BINARY 0
- #endif // O_BINARY
- #define closesocket(a) close(a)
- #define mg_fopen(x, y) fopen(x, y)
- #define mg_mkdir(x, y) mkdir(x, y)
- #define mg_remove(x) remove(x)
- #define mg_rename(x, y) rename(x, y)
- #define ERRNO errno
- #define INVALID_SOCKET (-1)
- #define INT64_FMT PRId64
- typedef int SOCKET;
- #define WINCDECL
- #endif // End of Windows and UNIX specific includes
- #include "mongoose.h"
- #define MONGOOSE_VERSION "3.0"
- #define PASSWORDS_FILE_NAME ".htpasswd"
- #define CGI_ENVIRONMENT_SIZE 4096
- #define MAX_CGI_ENVIR_VARS 64
- #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
- #if defined(DEBUG)
- #define DEBUG_TRACE(x) do { \
- flockfile(stdout); \
- printf("*** %lu.%p.%s.%d: ", \
- (unsigned long) time(NULL), (void *) pthread_self(), \
- __func__, __LINE__); \
- printf x; \
- putchar('\n'); \
- fflush(stdout); \
- funlockfile(stdout); \
- } while (0)
- #else
- #define DEBUG_TRACE(x)
- #endif // DEBUG
- // Darwin prior to 7.0 and Win32 do not have socklen_t
- #ifdef NO_SOCKLEN_T
- typedef int socklen_t;
- #endif // NO_SOCKLEN_T
- typedef void * (*mg_thread_func_t)(void *);
- static const char *http_500_error = "Internal Server Error";
- // Snatched from OpenSSL includes. I put the prototypes here to be independent
- // from the OpenSSL source installation. Having this, mongoose + SSL can be
- // built on any system with binary SSL libraries installed.
- typedef struct ssl_st SSL;
- typedef struct ssl_method_st SSL_METHOD;
- typedef struct ssl_ctx_st SSL_CTX;
- #define SSL_ERROR_WANT_READ 2
- #define SSL_ERROR_WANT_WRITE 3
- #define SSL_FILETYPE_PEM 1
- #define CRYPTO_LOCK 1
- #if defined(NO_SSL_DL)
- extern void SSL_free(SSL *);
- extern int SSL_accept(SSL *);
- extern int SSL_connect(SSL *);
- extern int SSL_read(SSL *, void *, int);
- extern int SSL_write(SSL *, const void *, int);
- extern int SSL_get_error(const SSL *, int);
- extern int SSL_set_fd(SSL *, int);
- extern SSL *SSL_new(SSL_CTX *);
- extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
- extern SSL_METHOD *SSLv23_server_method(void);
- extern int SSL_library_init(void);
- extern void SSL_load_error_strings(void);
- extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
- extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
- extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
- extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
- extern void SSL_CTX_free(SSL_CTX *);
- extern unsigned long ERR_get_error(void);
- extern char *ERR_error_string(unsigned long, char *);
- extern int CRYPTO_num_locks(void);
- extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
- extern void CRYPTO_set_id_callback(unsigned long (*)(void));
- #else
- // Dynamically loaded SSL functionality
- struct ssl_func {
- const char *name; // SSL function name
- void (*ptr)(void); // Function pointer
- };
- #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
- #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
- #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
- #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
- #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
- #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
- #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
- #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
- #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
- #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
- #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
- #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
- const char *, int)) ssl_sw[11].ptr)
- #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
- const char *, int)) ssl_sw[12].ptr)
- #define SSL_CTX_set_default_passwd_cb \
- (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
- #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
- #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
- #define SSL_CTX_use_certificate_chain_file \
- (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
- #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
- #define CRYPTO_set_locking_callback \
- (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
- #define CRYPTO_set_id_callback \
- (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
- #define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
- #define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
- // set_ssl_option() function updates this array.
- // It loads SSL library dynamically and changes NULLs to the actual addresses
- // of respective functions. The macros above (like SSL_connect()) are really
- // just calling these functions indirectly via the pointer.
- static struct ssl_func ssl_sw[] = {
- {"SSL_free", NULL},
- {"SSL_accept", NULL},
- {"SSL_connect", NULL},
- {"SSL_read", NULL},
- {"SSL_write", NULL},
- {"SSL_get_error", NULL},
- {"SSL_set_fd", NULL},
- {"SSL_new", NULL},
- {"SSL_CTX_new", NULL},
- {"SSLv23_server_method", NULL},
- {"SSL_library_init", NULL},
- {"SSL_CTX_use_PrivateKey_file", NULL},
- {"SSL_CTX_use_certificate_file",NULL},
- {"SSL_CTX_set_default_passwd_cb",NULL},
- {"SSL_CTX_free", NULL},
- {"SSL_load_error_strings", NULL},
- {"SSL_CTX_use_certificate_chain_file", NULL},
- {NULL, NULL}
- };
- // Similar array as ssl_sw. These functions could be located in different lib.
- static struct ssl_func crypto_sw[] = {
- {"CRYPTO_num_locks", NULL},
- {"CRYPTO_set_locking_callback", NULL},
- {"CRYPTO_set_id_callback", NULL},
- {"ERR_get_error", NULL},
- {"ERR_error_string", NULL},
- {NULL, NULL}
- };
- #endif // NO_SSL_DL
- static const char *month_names[] = {
- "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
- };
- // Unified socket address. For IPv6 support, add IPv6 address structure
- // in the union u.
- struct usa {
- socklen_t len;
- union {
- struct sockaddr sa;
- struct sockaddr_in sin;
- } u;
- };
- // Describes a string (chunk of memory).
- struct vec {
- const char *ptr;
- size_t len;
- };
- // Structure used by mg_stat() function. Uses 64 bit file length.
- struct mgstat {
- int is_directory; // Directory marker
- int64_t size; // File size
- time_t mtime; // Modification time
- };
- // Describes listening socket, or socket which was accept()-ed by the master
- // thread and queued for future handling by the worker thread.
- struct socket {
- struct socket *next; // Linkage
- SOCKET sock; // Listening socket
- struct usa lsa; // Local socket address
- struct usa rsa; // Remote socket address
- int is_ssl; // Is socket SSL-ed
- int is_proxy;
- };
- enum {
- CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
- PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE,
- SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
- GLOBAL_PASSWORDS_FILE, INDEX_FILES,
- ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE,
- EXTRA_MIME_TYPES, LISTENING_PORTS,
- DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER,
- NUM_OPTIONS
- };
- static const char *config_options[] = {
- "C", "cgi_extensions", ".cgi,.pl,.php",
- "E", "cgi_environment", NULL,
- "G", "put_delete_passwords_file", NULL,
- "I", "cgi_interpreter", NULL,
- "P", "protect_uri", NULL,
- "R", "authentication_domain", "mydomain.com",
- "S", "ssi_extensions", ".shtml,.shtm",
- "a", "access_log_file", NULL,
- "c", "ssl_chain_file", NULL,
- "d", "enable_directory_listing", "yes",
- "e", "error_log_file", NULL,
- "g", "global_passwords_file", NULL,
- "i", "index_files", "index.html,index.htm,index.cgi",
- "k", "enable_keep_alive", "no",
- "l", "access_control_list", NULL,
- "M", "max_request_size", "16384",
- "m", "extra_mime_types", NULL,
- "p", "listening_ports", "8080",
- "r", "document_root", ".",
- "s", "ssl_certificate", NULL,
- "t", "num_threads", "10",
- "u", "run_as_user", NULL,
- NULL
- };
- #define ENTRIES_PER_CONFIG_OPTION 3
- struct mg_context {
- volatile int stop_flag; // Should we stop event loop
- SSL_CTX *ssl_ctx; // SSL context
- char *config[NUM_OPTIONS]; // Mongoose configuration parameters
- mg_callback_t user_callback; // User-defined callback function
- void *user_data; // User-defined data
- struct socket *listening_sockets;
- volatile int num_threads; // Number of threads
- pthread_mutex_t mutex; // Protects (max|num)_threads
- pthread_cond_t cond; // Condvar for tracking workers terminations
- struct socket queue[20]; // Accepted sockets
- volatile int sq_head; // Head of the socket queue
- volatile int sq_tail; // Tail of the socket queue
- pthread_cond_t sq_full; // Singaled when socket is produced
- pthread_cond_t sq_empty; // Signaled when socket is consumed
- };
- struct mg_connection {
- struct mg_connection *peer; // Remote target in proxy mode
- struct mg_request_info request_info;
- struct mg_context *ctx;
- SSL *ssl; // SSL descriptor
- struct socket client; // Connected client
- time_t birth_time; // Time connection was accepted
- int64_t num_bytes_sent; // Total bytes sent to client
- int64_t content_len; // Content-Length header value
- int64_t consumed_content; // How many bytes of content is already read
- char *buf; // Buffer for received data
- int buf_size; // Buffer size
- int request_len; // Size of the request + headers in a buffer
- int data_len; // Total size of data in a buffer
- };
- const char **mg_get_valid_option_names(void) {
- return config_options;
- }
- static void *call_user(struct mg_connection *conn, enum mg_event event) {
- conn->request_info.user_data = conn->ctx->user_data;
- return conn->ctx->user_callback == NULL ? NULL :
- conn->ctx->user_callback(event, conn, &conn->request_info);
- }
- static int get_option_index(const char *name) {
- int i;
- for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
- if (strcmp(config_options[i], name) == 0 ||
- strcmp(config_options[i + 1], name) == 0) {
- return i / ENTRIES_PER_CONFIG_OPTION;
- }
- }
- return -1;
- }
- const char *mg_get_option(const struct mg_context *ctx, const char *name) {
- int i;
- if ((i = get_option_index(name)) == -1) {
- return NULL;
- } else if (ctx->config[i] == NULL) {
- return "";
- } else {
- return ctx->config[i];
- }
- }
- // Print error message to the opened error log stream.
- static void cry(struct mg_connection *conn, const char *fmt, ...) {
- char buf[BUFSIZ];
- va_list ap;
- FILE *fp;
- time_t timestamp;
- va_start(ap, fmt);
- (void) vsnprintf(buf, sizeof(buf), fmt, ap);
- va_end(ap);
- // Do not lock when getting the callback value, here and below.
- // I suppose this is fine, since function cannot disappear in the
- // same way string option can.
- conn->request_info.log_message = buf;
- if (call_user(conn, MG_EVENT_LOG) == NULL) {
- fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
- mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
- if (fp != NULL) {
- flockfile(fp);
- timestamp = time(NULL);
- (void) fprintf(fp,
- "[%010lu] [error] [client %s] ",
- (unsigned long) timestamp,
- inet_ntoa(conn->client.rsa.u.sin.sin_addr));
- if (conn->request_info.request_method != NULL) {
- (void) fprintf(fp, "%s %s: ",
- conn->request_info.request_method,
- conn->request_info.uri);
- }
- (void) fprintf(fp, "%s", buf);
- fputc('\n', fp);
- funlockfile(fp);
- if (fp != stderr) {
- fclose(fp);
- }
- }
- }
- conn->request_info.log_message = NULL;
- }
- // Return OpenSSL error message
- static const char *ssl_error(void) {
- unsigned long err;
- err = ERR_get_error();
- return err == 0 ? "" : ERR_error_string(err, NULL);
- }
- // Return fake connection structure. Used for logging, if connection
- // is not applicable at the moment of logging.
- static struct mg_connection *fc(struct mg_context *ctx) {
- static struct mg_connection fake_connection;
- fake_connection.ctx = ctx;
- return &fake_connection;
- }
- const char *mg_version(void) {
- return MONGOOSE_VERSION;
- }
- static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
- for (; *src != '\0' && n > 1; n--) {
- *dst++ = *src++;
- }
- *dst = '\0';
- }
- static int lowercase(const char *s) {
- return tolower(* (const unsigned char *) s);
- }
- static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
- int diff = 0;
- if (len > 0)
- do {
- diff = lowercase(s1++) - lowercase(s2++);
- } while (diff == 0 && s1[-1] != '\0' && --len > 0);
- return diff;
- }
- static int mg_strcasecmp(const char *s1, const char *s2) {
- int diff;
- do {
- diff = lowercase(s1++) - lowercase(s2++);
- } while (diff == 0 && s1[-1] != '\0');
- return diff;
- }
- static char * mg_strndup(const char *ptr, size_t len) {
- char *p;
- if ((p = (char *) malloc(len + 1)) != NULL) {
- mg_strlcpy(p, ptr, len + 1);
- }
- return p;
- }
- static char * mg_strdup(const char *str) {
- return mg_strndup(str, strlen(str));
- }
- // Like snprintf(), but never returns negative value, or the value
- // that is larger than a supplied buffer.
- // Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
- // in his audit report.
- static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
- const char *fmt, va_list ap) {
- int n;
- if (buflen == 0)
- return 0;
- n = vsnprintf(buf, buflen, fmt, ap);
- if (n < 0) {
- cry(conn, "vsnprintf error");
- n = 0;
- } else if (n >= (int) buflen) {
- cry(conn, "truncating vsnprintf buffer: [%.*s]",
- n > 200 ? 200 : n, buf);
- n = (int) buflen - 1;
- }
- buf[n] = '\0';
- return n;
- }
- static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
- const char *fmt, ...) {
- va_list ap;
- int n;
- va_start(ap, fmt);
- n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
- va_end(ap);
- return n;
- }
- // Skip the characters until one of the delimiters characters found.
- // 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
- // Advance pointer to buffer to the next word. Return found 0-terminated word.
- // Delimiters can be quoted with quotechar.
- static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) {
- char *p, *begin_word, *end_word, *end_whitespace;
- begin_word = *buf;
- end_word = begin_word + strcspn(begin_word, delimiters);
- /* Check for quotechar */
- if (end_word > begin_word) {
- p = end_word - 1;
- while (*p == quotechar) {
- /* If there is anything beyond end_word, copy it */
- if (*end_word == '\0') {
- *p = '\0';
- break;
- } else {
- size_t end_off = strcspn(end_word + 1, delimiters);
- memmove (p, end_word, end_off + 1);
- p += end_off; /* p must correspond to end_word - 1 */
- end_word += end_off + 1;
- }
- }
- for (p++; p < end_word; p++) {
- *p = '\0';
- }
- }
- if (*end_word == '\0') {
- *buf = end_word;
- } else {
- end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
- for (p = end_word; p < end_whitespace; p++) {
- *p = '\0';
- }
- *buf = end_whitespace;
- }
- return begin_word;
- }
- // Simplified version of skip_quoted without quote char
- // and whitespace == delimiters
- static char *skip(char **buf, const char *delimiters) {
- return skip_quoted(buf, delimiters, delimiters, 0);
- }
- // Return HTTP header value, or NULL if not found.
- static const char *get_header(const struct mg_request_info *ri,
- const char *name) {
- int i;
- for (i = 0; i < ri->num_headers; i++)
- if (!mg_strcasecmp(name, ri->http_headers[i].name))
- return ri->http_headers[i].value;
- return NULL;
- }
- const char *mg_get_header(const struct mg_connection *conn, const char *name) {
- return get_header(&conn->request_info, name);
- }
- // A helper function for traversing comma separated list of values.
- // It returns a list pointer shifted to the next value, of NULL if the end
- // of the list found.
- // Value is stored in val vector. If value has form "x=y", then eq_val
- // vector is initialized to point to the "y" part, and val vector length
- // is adjusted to point only to "x".
- static const char *next_option(const char *list, struct vec *val,
- struct vec *eq_val) {
- if (list == NULL || *list == '\0') {
- /* End of the list */
- list = NULL;
- } else {
- val->ptr = list;
- if ((list = strchr(val->ptr, ',')) != NULL) {
- /* Comma found. Store length and shift the list ptr */
- val->len = list - val->ptr;
- list++;
- } else {
- /* This value is the last one */
- list = val->ptr + strlen(val->ptr);
- val->len = list - val->ptr;
- }
- if (eq_val != NULL) {
- /*
- * Value has form "x=y", adjust pointers and lengths
- * so that val points to "x", and eq_val points to "y".
- */
- eq_val->len = 0;
- eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
- if (eq_val->ptr != NULL) {
- eq_val->ptr++; /* Skip over '=' character */
- eq_val->len = val->ptr + val->len - eq_val->ptr;
- val->len = (eq_val->ptr - val->ptr) - 1;
- }
- }
- }
- return list;
- }
- #if !defined(NO_CGI)
- static int match_extension(const char *path, const char *ext_list) {
- struct vec ext_vec;
- size_t path_len;
- path_len = strlen(path);
- while ((ext_list = next_option(ext_list, &ext_vec, NULL)) != NULL)
- if (ext_vec.len < path_len &&
- mg_strncasecmp(path + path_len - ext_vec.len,
- ext_vec.ptr, ext_vec.len) == 0)
- return 1;
- return 0;
- }
- #endif // !NO_CGI
- // HTTP 1.1 assumes keep alive if "Connection:" header is not set
- // This function must tolerate situations when connection info is not
- // set up, for example if request parsing failed.
- static int should_keep_alive(const struct mg_connection *conn) {
- const char *http_version = conn->request_info.http_version;
- const char *header = mg_get_header(conn, "Connection");
- return (header == NULL && http_version && !strcmp(http_version, "1.1")) ||
- (header != NULL && !mg_strcasecmp(header, "keep-alive"));
- }
- static const char *suggest_connection_header(const struct mg_connection *conn) {
- return should_keep_alive(conn) ? "keep-alive" : "close";
- }
- static void send_http_error(struct mg_connection *conn, int status,
- const char *reason, const char *fmt, ...) {
- char buf[BUFSIZ];
- va_list ap;
- int len;
- conn->request_info.status_code = status;
- if (call_user(conn, MG_HTTP_ERROR) == NULL) {
- buf[0] = '\0';
- len = 0;
- /* Errors 1xx, 204 and 304 MUST NOT send a body */
- if (status > 199 && status != 204 && status != 304) {
- len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
- cry(conn, "%s", buf);
- buf[len++] = '\n';
- va_start(ap, fmt);
- len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
- va_end(ap);
- }
- DEBUG_TRACE(("[%s]", buf));
- mg_printf(conn, "HTTP/1.1 %d %s\r\n"
- "Content-Type: text/plain\r\n"
- "Content-Length: %d\r\n"
- "Connection: %s\r\n\r\n", status, reason, len,
- suggest_connection_header(conn));
- conn->num_bytes_sent += mg_printf(conn, "%s", buf);
- }
- }
- #if defined(_WIN32) && !defined(__SYMBIAN32__)
- static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
- unused = NULL;
- *mutex = CreateMutex(NULL, FALSE, NULL);
- return *mutex == NULL ? -1 : 0;
- }
- static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
- return CloseHandle(*mutex) == 0 ? -1 : 0;
- }
- static int pthread_mutex_lock(pthread_mutex_t *mutex) {
- return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
- }
- static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
- return ReleaseMutex(*mutex) == 0 ? -1 : 0;
- }
- static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
- unused = NULL;
- cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
- cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
- return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
- }
- static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
- HANDLE handles[] = {cv->signal, cv->broadcast};
- ReleaseMutex(*mutex);
- WaitForMultipleObjects(2, handles, FALSE, INFINITE);
- return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
- }
- static int pthread_cond_signal(pthread_cond_t *cv) {
- return SetEvent(cv->signal) == 0 ? -1 : 0;
- }
- static int pthread_cond_broadcast(pthread_cond_t *cv) {
- // Implementation with PulseEvent() has race condition, see
- // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
- return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
- }
- static int pthread_cond_destroy(pthread_cond_t *cv) {
- return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
- }
- static pthread_t pthread_self(void) {
- return GetCurrentThreadId();
- }
- // For Windows, change all slashes to backslashes in path names.
- static void change_slashes_to_backslashes(char *path) {
- int i;
- for (i = 0; path[i] != '\0'; i++) {
- if (path[i] == '/')
- path[i] = '\\';
- // i > 0 check is to preserve UNC paths, like \\server\file.txt
- if (path[i] == '\\' && i > 0)
- while (path[i + 1] == '\\' || path[i + 1] == '/')
- (void) memmove(path + i + 1,
- path + i + 2, strlen(path + i + 1));
- }
- }
- // Encode 'path' which is assumed UTF-8 string, into UNICODE string.
- // wbuf and wbuf_len is a target buffer and its length.
- static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
- char buf[PATH_MAX], *p;
- mg_strlcpy(buf, path, sizeof(buf));
- change_slashes_to_backslashes(buf);
- // Point p to the end of the file name
- p = buf + strlen(buf) - 1;
- // Trim trailing backslash character
- while (p > buf && *p == '\\' && p[-1] != ':') {
- *p-- = '\0';
- }
- // Protect from CGI code disclosure.
- // This is very nasty hole. Windows happily opens files with
- // some garbage in the end of file name. So fopen("a.cgi ", "r")
- // actually opens "a.cgi", and does not return an error!
- if (*p == 0x20 || // No space at the end
- (*p == 0x2e && p > buf) || // No '.' but allow '.' as full path
- *p == 0x2b || // No '+'
- (*p & ~0x7f)) { // And generally no non-ascii chars
- (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
- buf[0] = '\0';
- }
- (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
- }
- #if defined(_WIN32_WCE)
- static time_t time(time_t *ptime) {
- time_t t;
- SYSTEMTIME st;
- FILETIME ft;
- GetSystemTime(&st);
- SystemTimeToFileTime(&st, &ft);
- t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
- if (ptime != NULL) {
- *ptime = t;
- }
- return t;
- }
- static time_t mktime(struct tm *ptm) {
- SYSTEMTIME st;
- FILETIME ft, lft;
- st.wYear = ptm->tm_year + 1900;
- st.wMonth = ptm->tm_mon + 1;
- st.wDay = ptm->tm_mday;
- st.wHour = ptm->tm_hour;
- st.wMinute = ptm->tm_min;
- st.wSecond = ptm->tm_sec;
- st.wMilliseconds = 0;
- SystemTimeToFileTime(&st, &ft);
- LocalFileTimeToFileTime(&ft, &lft);
- return (time_t) ((MAKEUQUAD(lft.dwLowDateTime, lft.dwHighDateTime) -
- EPOCH_DIFF) / RATE_DIFF);
- }
- static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
- int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
- FILETIME ft, lft;
- SYSTEMTIME st;
- TIME_ZONE_INFORMATION tzinfo;
- if (ptm == NULL) {
- return NULL;
- }
- * (int64_t *) &ft = t;
- FileTimeToLocalFileTime(&ft, &lft);
- FileTimeToSystemTime(&lft, &st);
- ptm->tm_year = st.wYear - 1900;
- ptm->tm_mon = st.wMonth - 1;
- ptm->tm_wday = st.wDayOfWeek;
- ptm->tm_mday = st.wDay;
- ptm->tm_hour = st.wHour;
- ptm->tm_min = st.wMinute;
- ptm->tm_sec = st.wSecond;
- ptm->tm_yday = 0; // hope nobody uses this
- ptm->tm_isdst =
- GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
- return ptm;
- }
- static size_t strftime(char *dst, size_t dst_size, const char *fmt,
- const struct tm *tm) {
- (void) snprintf(dst, dst_size, "implement strftime() for WinCE");
- return 0;
- }
- #endif
- static int mg_rename(const char* oldname, const char* newname) {
- wchar_t woldbuf[PATH_MAX];
- wchar_t wnewbuf[PATH_MAX];
- to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
- to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
- return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
- }
- static FILE *mg_fopen(const char *path, const char *mode) {
- wchar_t wbuf[PATH_MAX], wmode[20];
- to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
- MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
- return _wfopen(wbuf, wmode);
- }
- static int mg_stat(const char *path, struct mgstat *stp) {
- int ok = -1; // Error
- wchar_t wbuf[PATH_MAX];
- WIN32_FILE_ATTRIBUTE_DATA info;
- to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
- if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
- stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
- stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
- info.ftLastWriteTime.dwHighDateTime);
- stp->is_directory =
- info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
- ok = 0; // Success
- }
- return ok;
- }
- static int mg_remove(const char *path) {
- wchar_t wbuf[PATH_MAX];
- to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
- return DeleteFileW(wbuf) ? 0 : -1;
- }
- static int mg_mkdir(const char *path, int mode) {
- char buf[PATH_MAX];
- wchar_t wbuf[PATH_MAX];
- mode = 0; // Unused
- mg_strlcpy(buf, path, sizeof(buf));
- change_slashes_to_backslashes(buf);
- (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
- return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
- }
- // Implementation of POSIX opendir/closedir/readdir for Windows.
- static DIR * opendir(const char *name) {
- DIR *dir = NULL;
- wchar_t wpath[PATH_MAX];
- DWORD attrs;
- if (name == NULL) {
- SetLastError(ERROR_BAD_ARGUMENTS);
- } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
- SetLastError(ERROR_NOT_ENOUGH_MEMORY);
- } else {
- to_unicode(name, wpath, ARRAY_SIZE(wpath));
- attrs = GetFileAttributesW(wpath);
- if (attrs != 0xFFFFFFFF &&
- ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
- (void) wcscat(wpath, L"\\*");
- dir->handle = FindFirstFileW(wpath, &dir->info);
- dir->result.d_name[0] = '\0';
- } else {
- free(dir);
- dir = NULL;
- }
- }
- return dir;
- }
- static int closedir(DIR *dir) {
- int result = 0;
- if (dir != NULL) {
- if (dir->handle != INVALID_HANDLE_VALUE)
- result = FindClose(dir->handle) ? 0 : -1;
- free(dir);
- } else {
- result = -1;
- SetLastError(ERROR_BAD_ARGUMENTS);
- }
- return result;
- }
- struct dirent * readdir(DIR *dir) {
- struct dirent *result = 0;
- if (dir) {
- if (dir->handle != INVALID_HANDLE_VALUE) {
- result = &dir->result;
- (void) WideCharToMultiByte(CP_UTF8, 0,
- dir->info.cFileName, -1, result->d_name,
- sizeof(result->d_name), NULL, NULL);
- if (!FindNextFileW(dir->handle, &dir->info)) {
- (void) FindClose(dir->handle);
- dir->handle = INVALID_HANDLE_VALUE;
- }
- } else {
- SetLastError(ERROR_FILE_NOT_FOUND);
- }
- } else {
- SetLastError(ERROR_BAD_ARGUMENTS);
- }
- return result;
- }
- #define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
- static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
- void *param) {
- HANDLE hThread;
- ctx = NULL; // Unused
- hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) func, param, 0,
- NULL);
- if (hThread != NULL) {
- (void) CloseHandle(hThread);
- }
- return hThread == NULL ? -1 : 0;
- }
- static HANDLE dlopen(const char *dll_name, int flags) {
- wchar_t wbuf[PATH_MAX];
- flags = 0; // Unused
- to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
- return LoadLibraryW(wbuf);
- }
- #if !defined(NO_CGI)
- #define SIGKILL 0
- static int kill(pid_t pid, int sig_num) {
- (void) TerminateProcess(pid, sig_num);
- (void) CloseHandle(pid);
- return 0;
- }
- static pid_t spawn_process(struct mg_connection *conn, const char *prog,
- char *envblk, char *envp[], int fd_stdin,
- int fd_stdout, const char *dir) {
- HANDLE me;
- char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
- FILE *fp;
- STARTUPINFOA si;
- PROCESS_INFORMATION pi;
- envp = NULL; // Unused
- (void) memset(&si, 0, sizeof(si));
- (void) memset(&pi, 0, sizeof(pi));
- // TODO(lsm): redirect CGI errors to the error log file
- si.cb = sizeof(si);
- si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
- si.wShowWindow = SW_HIDE;
- me = GetCurrentProcess();
- (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
- &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
- (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
- &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
- // If CGI file is a script, try to read the interpreter line
- interp = conn->ctx->config[CGI_INTERPRETER];
- if (interp == NULL) {
- buf[2] = '\0';
- if ((fp = fopen(cmdline, "r")) != NULL) {
- (void) fgets(buf, sizeof(buf), fp);
- if (buf[0] != '#' || buf[1] != '!') {
- // First line does not start with "#!". Do not set interpreter.
- buf[2] = '\0';
- } else {
- // Trim whitespaces in interpreter name
- for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
- *p = '\0';
- }
- }
- (void) fclose(fp);
- }
- interp = buf + 2;
- }
- (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
- interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
- DEBUG_TRACE(("Running [%s]", cmdline));
- if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
- CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
- cry(conn, "%s: CreateProcess(%s): %d",
- __func__, cmdline, ERRNO);
- pi.hProcess = (pid_t) -1;
- } else {
- (void) close(fd_stdin);
- (void) close(fd_stdout);
- }
- (void) CloseHandle(si.hStdOutput);
- (void) CloseHandle(si.hStdInput);
- (void) CloseHandle(pi.hThread);
- return (pid_t) pi.hProcess;
- }
- #endif /* !NO_CGI */
- static int set_non_blocking_mode(SOCKET sock) {
- unsigned long on = 1;
- return ioctlsocket(sock, FIONBIO, &on);
- }
- #else
- static int mg_stat(const char *path, struct mgstat *stp) {
- struct stat st;
- int ok;
- if (stat(path, &st) == 0) {
- ok = 0;
- stp->size = st.st_size;
- stp->mtime = st.st_mtime;
- stp->is_directory = S_ISDIR(st.st_mode);
- } else {
- ok = -1;
- }
- return ok;
- }
- static void set_close_on_exec(int fd) {
- (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
- }
- static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
- void *param) {
- pthread_t thread_id;
- pthread_attr_t attr;
- int retval;
- (void) pthread_attr_init(&attr);
- (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
- // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
- // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
- if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) {
- cry(fc(ctx), "%s: %s", __func__, strerror(retval));
- }
- return retval;
- }
- #ifndef NO_CGI
- static pid_t spawn_process(struct mg_connection *conn, const char *prog,
- char *envblk, char *envp[], int fd_stdin,
- int fd_stdout, const char *dir) {
- pid_t pid;
- const char *interp;
- envblk = NULL; // Unused
- if ((pid = fork()) == -1) {
- // Parent
- send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
- } else if (pid == 0) {
- // Child
- if (chdir(dir) != 0) {
- cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
- } else if (dup2(fd_stdin, 0) == -1) {
- cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
- } else if (dup2(fd_stdout, 1) == -1) {
- cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
- } else {
- (void) dup2(fd_stdout, 2);
- (void) close(fd_stdin);
- (void) close(fd_stdout);
- // Execute CGI program. No need to lock: new process
- interp = conn->ctx->config[CGI_INTERPRETER];
- if (interp == NULL) {
- (void) execle(prog, prog, NULL, envp);
- cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
- } else {
- (void) execle(interp, interp, prog, NULL, envp);
- cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
- strerror(ERRNO));
- }
- }
- exit(EXIT_FAILURE);
- } else {
- // Parent. Close stdio descriptors
- (void) close(fd_stdin);
- (void) close(fd_stdout);
- }
- return pid;
- }
- #endif // !NO_CGI
- static int set_non_blocking_mode(SOCKET sock) {
- int flags;
- flags = fcntl(sock, F_GETFL, 0);
- (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
- return 0;
- }
- #endif // _WIN32
- // Write data to the IO channel - opened file descriptor, socket or SSL
- // descriptor. Return number of bytes written.
- static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
- int64_t len) {
- int64_t sent;
- int n, k;
- sent = 0;
- while (sent < len) {
- /* How many bytes we send in this iteration */
- k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
- if (ssl != NULL) {
- n = SSL_write(ssl, buf + sent, k);
- } else if (fp != NULL) {
- n = fwrite(buf + sent, 1, (size_t)k, fp);
- if (ferror(fp))
- n = -1;
- } else {
- n = send(sock, buf + sent, (size_t)k, 0);
- }
- if (n < 0)
- break;
- sent += n;
- }
- return sent;
- }
- // Read from IO channel - opened file descriptor, socket, or SSL descriptor.
- // Return number of bytes read.
- static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) {
- int nread;
- if (ssl != NULL) {
- nread = SSL_read(ssl, buf, len);
- } else if (fp != NULL) {
- // Use read() instead of fread(), because if we're reading from the CGI
- // pipe, fread() may block until IO buffer is filled up. We cannot afford
- // to block and must pass all read bytes immediately to the client.
- nread = read(fileno(fp), buf, (size_t) len);
- if (ferror(fp))
- nread = -1;
- } else {
- nread = recv(sock, buf, (size_t) len, 0);
- }
- return nread;
- }
- int mg_read(struct mg_connection *conn, void *buf, size_t len) {
- int n, buffered_len, nread;
- const char *buffered;
- assert((conn->content_len == -1 && conn->consumed_content == 0) ||
- conn->consumed_content <= conn->content_len);
- DEBUG_TRACE(("%p %zu %lld %lld", buf, len,
- conn->content_len, conn->consumed_content));
- nread = 0;
- if (conn->consumed_content < conn->content_len) {
- // Adjust number of bytes to read.
- int64_t to_read = conn->content_len - conn->consumed_content;
- if (to_read < (int64_t) len) {
- len = (int) to_read;
- }
- // How many bytes of data we have buffered in the request buffer?
- buffered = conn->buf + conn->request_len + conn->consumed_content;
- buffered_len = conn->data_len - conn->request_len;
- assert(buffered_len >= 0);
- // Return buffered data back if we haven't done that yet.
- if (conn->consumed_content < (int64_t) buffered_len) {
- buffered_len -= (int) conn->consumed_content;
- if (len < (size_t) buffered_len) {
- buffered_len = len;
- }
- memcpy(buf, buffered, (size_t)buffered_len);
- len -= buffered_len;
- buf = (char *) buf + buffered_len;
- conn->consumed_content += buffered_len;
- nread = buffered_len;
- }
- // We have returned all buffered data. Read new data from the remote socket.
- while (len > 0) {
- n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len);
- if (n <= 0) {
- break;
- }
- buf = (char *) buf + n;
- conn->consumed_content += n;
- nread += n;
- len -= n;
- }
- }
- return nread;
- }
- int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
- return (int) push(NULL, conn->client.sock, conn->ssl,
- (const char *) buf, (int64_t) len);
- }
- int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
- char buf[BUFSIZ];
- int len;
- va_list ap;
- va_start(ap, fmt);
- len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap);
- va_end(ap);
- return mg_write(conn, buf, (size_t)len);
- }
- // URL-decode input buffer into destination buffer.
- // 0-terminate the destination buffer. Return the length of decoded data.
- // form-url-encoded data differs from URI encoding in a way that it
- // uses '+' as character for space, see RFC 1866 section 8.2.1
- // http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
- static size_t url_decode(const char *src, size_t src_len, char *dst,
- size_t dst_len, int is_form_url_encoded) {
- size_t i, j;
- int a, b;
- #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
- for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
- if (src[i] == '%' &&
- isxdigit(* (const unsigned char *) (src + i + 1)) &&
- isxdigit(* (const unsigned char *) (src + i + 2))) {
- a = tolower(* (const unsigned char *) (src + i + 1));
- b = tolower(* (const unsigned char *) (src + i + 2));
- dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
- i += 2;
- } else if (is_form_url_encoded && src[i] == '+') {
- dst[j] = ' ';
- } else {
- dst[j] = src[i];
- }
- }
- dst[j] = '\0'; /* Null-terminate the destination */
- return j;
- }
- // Scan given buffer and fetch the value of the given variable.
- // It can be specified in query string, or in the POST data.
- // Return NULL if the variable not found, or allocated 0-terminated value.
- // It is caller's responsibility to free the returned value.
- int mg_get_var(const char *buf, size_t buf_len, const char *name,
- char *dst, size_t dst_len) {
- const char *p, *e, *s;
- size_t name_len, len;
- name_len = strlen(name);
- e = buf + buf_len;
- len = -1;
- dst[0] = '\0';
- // buf is "var1=val1&var2=val2...". Find variable first
- for (p = buf; p != NULL && p + name_len < e; p++) {
- if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
- !mg_strncasecmp(name, p, name_len)) {
- // Point p to variable value
- p += name_len + 1;
- // Point s to the end of the value
- s = (const char *) memchr(p, '&', (size_t)(e - p));
- if (s == NULL) {
- s = e;
- }
- assert(s >= p);
- // Decode variable into destination buffer
- if ((size_t) (s - p) < dst_len) {
- len = url_decode(p, (size_t)(s - p), dst, dst_len, 1);
- }
- break;
- }
- }
- return len;
- }
- int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
- char *dst, size_t dst_size) {
- const char *s, *p, *end;
- int name_len, len = -1;
- dst[0] = '\0';
- if ((s = mg_get_header(conn, "Cookie")) == NULL) {
- return 0;
- }
- name_len = strlen(cookie_name);
- end = s + strlen(s);
- for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
- if (s[name_len] == '=') {
- s += name_len + 1;
- if ((p = strchr(s, ' ')) == NULL)
- p = end;
- if (p[-1] == ';')
- p--;
- if (*s == '"' && p[-1] == '"' && p > s + 1) {
- s++;
- p--;
- }
- if ((size_t) (p - s) < dst_size) {
- len = (p - s) + 1;
- mg_strlcpy(dst, s, (size_t)len);
- }
- break;
- }
- return len;
- }
- // Mongoose allows to specify multiple directories to serve,
- // like /var/www,/~bob=/home/bob. That means that root directory depends on URI.
- // This function returns root dir for given URI.
- static int get_document_root(const struct mg_connection *conn,
- struct vec *document_root) {
- const char *root, *uri;
- int len_of_matched_uri;
- struct vec uri_vec, path_vec;
- uri = conn->request_info.uri;
- len_of_matched_uri = 0;
- root = next_option(conn->ctx->config[DOCUMENT_ROOT], document_root, NULL);
- while ((root = next_option(root, &uri_vec, &path_vec)) != NULL) {
- if (memcmp(uri, uri_vec.ptr, uri_vec.len) == 0) {
- *document_root = path_vec;
- len_of_matched_uri = uri_vec.len;
- break;
- }
- }
- return len_of_matched_uri;
- }
- static void convert_uri_to_file_name(struct mg_connection *conn,
- const char *uri, char *buf,
- size_t buf_len) {
- struct vec vec;
- int match_len;
- match_len = get_document_root(conn, &vec);
- mg_snprintf(conn, buf, buf_len, "%.*s%s", vec.len, vec.ptr, uri + match_len);
- #if defined(_WIN32) && !defined(__SYMBIAN32__)
- change_slashes_to_backslashes(buf);
- #endif /* _WIN32 */
- DEBUG_TRACE(("[%s] -> [%s], [%.*s]", uri, buf, (int) vec.len, vec.ptr));
- }
- static int sslize(struct mg_connection *conn, int (*func)(SSL *)) {
- return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL &&
- SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
- func(conn->ssl) == 1;
- }
- static struct mg_connection *mg_connect(struct mg_connection *conn,
- const char *host, int port, int use_ssl) {
- struct mg_connection *newconn = NULL;
- struct sockaddr_in sin;
- struct hostent *he;
- int sock;
- if (conn->ctx->ssl_ctx == NULL && use_ssl) {
- cry(conn, "%s: SSL is not initialized", __func__);
- } else if ((he = gethostbyname(host)) == NULL) {
- cry(conn, "%s: gethostbyname(%s): %s", __func__, host, strerror(ERRNO));
- } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
- cry(conn, "%s: socket: %s", __func__, strerror(ERRNO));
- } else {
- sin.sin_family = AF_INET;
- sin.sin_port = htons((uint16_t) port);
- sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
- if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
- cry(conn, "%s: connect(%s:%d): %s", __func__, host, port,
- strerror(ERRNO));
- closesocket(sock);
- } else if ((newconn = (struct mg_connection *)
- calloc(1, sizeof(*newconn))) == NULL) {
- cry(conn, "%s: calloc: %s", __func__, strerror(ERRNO));
- closesocket(sock);
- } else {
- newconn->client.sock = sock;
- newconn->client.rsa.u.sin = sin;
- if (use_ssl) {
- sslize(newconn, SSL_connect);
- }
- }
- }
- return newconn;
- }
- // Check whether full request is buffered. Return:
- // -1 if request is malformed
- // 0 if request is not yet fully buffered
- // >0 actual request length, including last \r\n\r\n
- static int get_request_len(const char *buf, int buflen) {
- const char *s, *e;
- int len = 0;
- DEBUG_TRACE(("buf: %p, len: %d", buf, buflen));
- for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
- // Control characters are not allowed but >=128 is.
- if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
- *s != '\n' && * (const unsigned char *) s < 128) {
- len = -1;
- } else if (s[0] == '\n' && s[1] == '\n') {
- len = (int) (s - buf) + 2;
- } else if (s[0] == '\n' && &s[1] < e &&
- s[1] == '\r' && s[2] == '\n') {
- len = (int) (s - buf) + 3;
- }
- return len;
- }
- // Convert month to the month number. Return -1 on error, or month number
- static int month_number_to_month_name(const char *s) {
- size_t i;
- for (i = 0; i < ARRAY_SIZE(month_names); i++)
- if (!strcmp(s, month_names[i]))
- return (int) i;
- return -1;
- }
- // Parse date-time string, and return the corresponding time_t value
- static time_t parse_date_string(const char *s) {
- time_t current_time;
- struct tm tm, *tmp;
- char mon[32];
- int sec, min, hour, mday, month, year;
- (void) memset(&tm, 0, sizeof(tm));
- sec = min = hour = mday = month = year = 0;
- if (((sscanf(s, "%d/%3s/%d %d:%d:%d",
- &mday, mon, &year, &hour, &min, &sec) == 6) ||
- (sscanf(s, "%d %3s %d %d:%d:%d",
- &mday, mon, &year, &hour, &min, &sec) == 6) ||
- (sscanf(s, "%*3s, %d %3s %d %d:%d:%d",
- &mday, mon, &year, &hour, &min, &sec) == 6) ||
- (sscanf(s, "%d-%3s-%d %d:%d:%d",
- &mday, mon, &year, &hour, &min, &sec) == 6)) &&
- (month = month_number_to_month_name(mon)) != -1) {
- tm.tm_mday = mday;
- tm.tm_mon = month;
- tm.tm_year = year;
- tm.tm_hour = hour;
- tm.tm_min = min;
- tm.tm_sec = sec;
- }
- if (tm.tm_year > 1900) {
- tm.tm_year -= 1900;
- } else if (tm.tm_year < 70) {
- tm.tm_year += 100;
- }
- // Set Daylight Saving Time field
- current_time = time(NULL);
- tmp = localtime(¤t_time);
- tm.tm_isdst = tmp->tm_isdst;
- return mktime(&tm);
- }
- // Protect against directory disclosure attack by removing '..',
- // excessive '/' and '\' characters
- static void remove_double_dots_and_double_slashes(char *s) {
- char *p = s;
- while (*s != '\0') {
- *p++ = *s++;
- if (s[-1] == '/' || s[-1] == '\\') {
- // Skip all following slashes and backslashes
- while (*s == '/' || *s == '\\') {
- s++;
- }
- // Skip all double-dots
- while (*s == '.' && s[1] == '.') {
- s += 2;
- }
- }
- }
- *p = '\0';
- }
- static const struct {
- const char *extension;
- size_t ext_len;
- const char *mime_type;
- size_t mime_type_len;
- } builtin_mime_types[] = {
- {".html", 5, "text/html", 9},
- {".htm", 4, "text/html", 9},
- {".shtm", 5, "text/html", 9},
- {".shtml", 6, "text/html", 9},
- {".css", 4, "text/css", 8},
- {".js", 3, "application/x-javascript", 24},
- {".ico", 4, "image/x-icon", 12},
- {".gif", 4, "image/gif", 9},
- {".jpg", 4, "image/jpeg", 10},
- {".jpeg", 5, "image/jpeg", 10},
- {".png", 4, "image/png", 9},
- {".svg", 4, "image/svg+xml", 13},
- {".torrent", 8, "application/x-bittorrent", 24},
- {".wav", 4, "audio/x-wav", 11},
- {".mp3", 4, "audio/x-mp3", 11},
- {".mid", 4, "audio/mid", 9},
- {".m3u", 4, "audio/x-mpegurl", 15},
- {".ram", 4, "audio/x-pn-realaudio", 20},
- {".xml", 4, "text/xml", 8},
- {".xslt", 5, "application/xml", 15},
- {".ra", 3, "audio/x-pn-realaudio", 20},
- {".doc", 4, "application/msword", 19},
- {".exe", 4, "application/octet-stream", 24},
- {".zip", 4, "application/x-zip-compressed", 28},
- {".xls", 4, "application/excel", 17},
- {".tgz", 4, "application/x-tar-gz", 20},
- {".tar", 4, "application/x-tar", 17},
- {".gz", 3, "application/x-gunzip", 20},
- {".arj", 4, "application/x-arj-compressed", 28},
- {".rar", 4, "application/x-arj-compressed", 28},
- {".rtf", 4, "application/rtf", 15},
- {".pdf", 4, "application/pdf", 15},
- {".swf", 4, "application/x-shockwave-flash",29},
- {".mpg", 4, "video/mpeg", 10},
- {".mpeg", 5, "video/mpeg", 10},
- {".asf", 4, "video/x-ms-asf", 14},
- {".avi", 4, "video/x-msvideo", 15},
- {".bmp", 4, "image/bmp", 9},
- {NULL, 0, NULL, 0}
- };
- // Look at the "path" extension and figure what mime type it has.
- // Store mime type in the vector.
- static void get_mime_type(struct mg_context *ctx, const char *path,
- struct vec *vec) {
- struct vec ext_vec, mime_vec;
- const char *list, *ext;
- size_t i, path_len;
- path_len = strlen(path);
- // Scan user-defined mime types first, in case user wants to
- // override default mime types.
- list = ctx->config[EXTRA_MIME_TYPES];
- while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
- // ext now points to the path suffix
- ext = path + path_len - ext_vec.len;
- if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
- *vec = mime_vec;
- return;
- }
- }
- // Now scan built-in mime types
- for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
- ext = path + (path_len - builtin_mime_types[i].ext_len);
- if (path_len > builtin_mime_types[i].ext_len &&
- mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
- vec->ptr = builtin_mime_types[i].mime_type;
- vec->len = builtin_mime_types[i].mime_type_len;
- return;
- }
- }
- // Nothing found. Fall back to "text/plain"
- vec->ptr = "text/plain";
- vec->len = 10;
- }
- #ifndef HAVE_MD5
- typedef struct MD5Context {
- uint32_t buf[4];
- uint32_t bits[2];
- unsigned char in[64];
- } MD5_CTX;
- #if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
- #define byteReverse(buf, len) // Do nothing
- #else
- static void byteReverse(unsigned char *buf, unsigned longs) {
- uint32_t t;
- do {
- t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
- ((unsigned) buf[1] << 8 | buf[0]);
- *(uint32_t *) buf = t;
- buf += 4;
- } while (--longs);
- }
- #endif
- #define F1(x, y, z) (z ^ (x & (y ^ z)))
- #define F2(x, y, z) F1(z, x, y)
- #define F3(x, y, z) (x ^ y ^ z)
- #define F4(x, y, z) (y ^ (x | ~z))
- #define MD5STEP(f, w, x, y, z, data, s) \
- ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
- // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
- // initialization constants.
- static void MD5Init(MD5_CTX *ctx) {
- ctx->buf[0] = 0x67452301;
- ctx->buf[1] = 0xefcdab89;
- ctx->buf[2] = 0x98badcfe;
- ctx->buf[3] = 0x10325476;
- ctx->bits[0] = 0;
- ctx->bits[1] = 0;
- }
- static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
- register uint32_t a, b, c, d;
- a = buf[0];
- b = buf[1];
- c = buf[2];
- d = buf[3];
- MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
- MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
- MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
- MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
- MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
- MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
- MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
- MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
- MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
- MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
- MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
- MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
- MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
- MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
- MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
- MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
- MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
- MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
- MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
- MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
- MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
- MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
- MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
- MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
- MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
- MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
- MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
- MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
- MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
- MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
- MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
- MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
- MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
- MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
- MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
- MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
- MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
- MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
- MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
- MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
- MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
- MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
- MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
- MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
- MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
- MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
- MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
- MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
- MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
- MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
- MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
- MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
- MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
- MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
- MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
- MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
- MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
- MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
- MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
- MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
- MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
- MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
- MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
- MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
- buf[0] += a;
- buf[1] += b;
- buf[2] += c;
- buf[3] += d;
- }
- static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
- uint32_t t;
- t = ctx->bits[0];
- if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
- ctx->bits[1]++;
- ctx->bits[1] += len >> 29;
- t = (t >> 3) & 0x3f;
- if (t) {
- unsigned char *p = (unsigned char *) ctx->in + t;
- t = 64 - t;
- if (len < t) {
- memcpy(p, buf, len);
- return;
- }
- memcpy(p, buf, t);
- byteReverse(ctx->in, 16);
- MD5Transform(ctx->buf, (uint32_t *) ctx->in);
- buf += t;
- len -= t;
- }
- while (len >= 64) {
- memcpy(ctx->in, buf, 64);
- byteReverse(ctx->in, 16);
- MD5Transform(ctx->buf, (uint32_t *) ctx->in);
- buf += 64;
- len -= 64;
- }
- memcpy(ctx->in, buf, len);
- }
- static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
- unsigned count;
- unsigned char *p;
- count = (ctx->bits[0] >> 3) & 0x3F;
- p = ctx->in + count;
- *p++ = 0x80;
- count = 64 - 1 - count;
- if (count < 8) {
- memset(p, 0, count);
- byteReverse(ctx->in, 16);
- MD5Transform(ctx->buf, (uint32_t *) ctx->in);
- memset(ctx->in, 0, 56);
- } else {
- memset(p, 0, count - 8);
- }
- byteReverse(ctx->in, 14);
- ((uint32_t *) ctx->in)[14] = ctx->bits[0];
- ((uint32_t *) ctx->in)[15] = ctx->bits[1];
- MD5Transform(ctx->buf, (uint32_t *) ctx->in);
- byteReverse((unsigned char *) ctx->buf, 4);
- memcpy(digest, ctx->buf, 16);
- memset((char *) ctx, 0, sizeof(*ctx));
- }
- #endif // !HAVE_MD5
- // Stringify binary data. Output buffer must be twice as big as input,
- // because each byte takes 2 bytes in string representation
- static void bin2str(char *to, const unsigned char *p, size_t len) {
- static const char *hex = "0123456789abcdef";
- for (; len--; p++) {
- *to++ = hex[p[0] >> 4];
- *to++ = hex[p[0] & 0x0f];
- }
- *to = '\0';
- }
- // Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes.
- void mg_md5(char *buf, ...) {
- unsigned char hash[16];
- const char *p;
- va_list ap;
- MD5_CTX ctx;
- MD5Init(&ctx);
- va_start(ap, buf);
- while ((p = va_arg(ap, const char *)) != NULL) {
- MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
- }
- va_end(ap);
- MD5Final(hash, &ctx);
- bin2str(buf, hash, sizeof(hash));
- }
- // Check the user's password, return 1 if OK
- static int check_password(const char *method, const char *ha1, const char *uri,
- const char *nonce, const char *nc, const char *cnonce,
- const char *qop, const char *response) {
- char ha2[32 + 1], expected_response[32 + 1];
- // Some of the parameters may be NULL
- if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
- qop == NULL || response == NULL) {
- return 0;
- }
- // NOTE(lsm): due to a bug in MSIE, we do not compare the URI
- // TODO(lsm): check for authentication timeout
- if (// strcmp(dig->uri, c->ouri) != 0 ||
- strlen(response) != 32
- // || now - strtoul(dig->nonce, NULL, 10) > 3600
- ) {
- return 0;
- }
- mg_md5(ha2, method, ":", uri, NULL);
- mg_md5(expected_response, ha1, ":", nonce, ":", nc,
- ":", cnonce, ":", qop, ":", ha2, NULL);
- return mg_strcasecmp(response, expected_response) == 0;
- }
- // Use the global passwords file, if specified by auth_gpass option,
- // or search for .htpasswd in the requested directory.
- static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
- struct mg_context *ctx = conn->ctx;
- char name[PATH_MAX];
- const char *p, *e;
- struct mgstat st;
- FILE *fp;
- if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
- // Use global passwords file
- fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
- if (fp == NULL)
- cry(fc(ctx), "fopen(%s): %s",
- ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
- } else if (!mg_stat(path, &st) && st.is_directory) {
- (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
- path, DIRSEP, PASSWORDS_FILE_NAME);
- fp = mg_fopen(name, "r");
- } else {
- // Try to find .htpasswd in requested directory.
- for (p = path, e = p + strlen(p) - 1; e > p; e--)
- if (IS_DIRSEP_CHAR(*e))
- break;
- (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
- (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
- fp = mg_fopen(name, "r");
- }
- return fp;
- }
- // Parsed Authorization header
- struct ah {
- char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
- };
- static int parse_auth_header(struct mg_connection *conn, char *buf,
- size_t buf_size, struct ah *ah) {
- char *name, *value, *s;
- const char *auth_header;
- if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
- mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
- return 0;
- }
- // Make modifiable copy of the auth header
- (void) mg_strlcpy(buf, auth_header + 7, buf_size);
- s = buf;
- (void) memset(ah, 0, sizeof(*ah));
- // Parse authorization header
- for (;;) {
- // Gobble initial spaces
- while (isspace(* (unsigned char *) s)) {
- s++;
- }
- name = skip_quoted(&s, "=", " ", 0);
- /* Value is either quote-delimited, or ends at first comma or space. */
- if (s[0] == '\"') {
- s++;
- value = skip_quoted(&s, "\"", " ", '\\');
- if (s[0] == ',') {
- s++;
- }
- } else {
- value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces
- }
- if (*name == '\0') {
- break;
- }
- if (!strcmp(name, "username")) {
- ah->user = value;
- } else if (!strcmp(name, "cnonce")) {
- ah->cnonce = value;
- } else if (!strcmp(name, "response")) {
- ah->response = value;
- } else if (!strcmp(name, "uri")) {
- ah->uri = value;
- } else if (!strcmp(name, "qop")) {
- ah->qop = value;
- } else if (!strcmp(name, "nc")) {
- ah->nc = value;
- } else if (!strcmp(name, "nonce")) {
- ah->nonce = value;
- }
- }
- // CGI needs it as REMOTE_USER
- if (ah->user != NULL) {
- conn->request_info.remote_user = mg_strdup(ah->user);
- } else {
- return 0;
- }
- return 1;
- }
- // Authorize against the opened passwords file. Return 1 if authorized.
- static int authorize(struct mg_connection *conn, FILE *fp) {
- struct ah ah;
- char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ];
- if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
- return 0;
- }
- // Loop over passwords file
- while (fgets(line, sizeof(line), fp) != NULL) {
- if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
- continue;
- }
- if (!strcmp(ah.user, f_user) &&
- !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
- return check_password(
- conn->request_info.request_method,
- ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
- ah.response);
- }
- return 0;
- }
- // Return 1 if request is authorised, 0 otherwise.
- static int check_authorization(struct mg_connection *conn, const char *path) {
- FILE *fp;
- char fname[PATH_MAX];
- struct vec uri_vec, filename_vec;
- const char *list;
- int authorized;
- fp = NULL;
- authorized = 1;
- list = conn->ctx->config[PROTECT_URI];
- while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
- if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
- (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
- filename_vec.len, filename_vec.ptr);
- if ((fp = mg_fopen(fname, "r")) == NULL) {
- cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
- }
- break;
- }
- }
- if (fp == NULL) {
- fp = open_auth_file(conn, path);
- }
- if (fp != NULL) {
- authorized = authorize(conn, fp);
- (void) fclose(fp);
- }
- return authorized;
- }
- static void send_authorization_request(struct mg_connection *conn) {
- conn->request_info.status_code = 401;
- (void) mg_printf(conn,
- "HTTP/1.1 401 Unauthorized\r\n"
- "WWW-Authenticate: Digest qop=\"auth\", "
- "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
- conn->ctx->config[AUTHENTICATION_DOMAIN],
- (unsigned long) time(NULL));
- }
- static int is_authorized_for_put(struct mg_connection *conn) {
- FILE *fp;
- int ret = 0;
- fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
- mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
- if (fp != NULL) {
- ret = authorize(conn, fp);
- (void) fclose(fp);
- }
- return ret;
- }
- int mg_modify_passwords_file(const char *fname, const char *domain,
- const char *user, const char *pass) {
- int found;
- char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
- FILE *fp, *fp2;
- found = 0;
- fp = fp2 = NULL;
- // Regard empty password as no password - remove user record.
- if (pass[0] == '\0') {
- pass = NULL;
- }
- (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
- // Create the file if does not exist
- if ((fp = mg_fopen(fname, "a+")) != NULL) {
- (void) fclose(fp);
- }
- // Open the given file and temporary file
- if ((fp = mg_fopen(fname, "r")) == NULL) {
- return 0;
- } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
- fclose(fp);
- return 0;
- }
- // Copy the stuff to temporary file
- while (fgets(line, sizeof(line), fp) != NULL) {
- if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
- continue;
- }
- if (!strcmp(u, user) && !strcmp(d, domain)) {
- found++;
- if (pass != NULL) {
- mg_md5(ha1, user, ":", domain, ":", pass, NULL);
- fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
- }
- } else {
- (void) fprintf(fp2, "%s", line);
- }
- }
- // If new user, just add it
- if (!found && pass != NULL) {
- mg_md5(ha1, user, ":", domain, ":", pass, NULL);
- (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
- }
- // Close files
- (void) fclose(fp);
- (void) fclose(fp2);
- // Put the temp file in place of real file
- (void) mg_remove(fname);
- (void) mg_rename(tmp, fname);
- return 1;
- }
- struct de {
- struct mg_connection *conn;
- char *file_name;
- struct mgstat st;
- };
- static void url_encode(const char *src, char *dst, size_t dst_len) {
- static const char *dont_escape = "._-$,;~()";
- static const char *hex = "0123456789abcdef";
- const char *end = dst + dst_len - 1;
- for (; *src != '\0' && dst < end; src++, dst++) {
- if (isalnum(*(const unsigned char *) src) ||
- strchr(dont_escape, * (const unsigned char *) src) != NULL) {
- *dst = *src;
- } else if (dst + 2 < end) {
- dst[0] = '%';
- dst[1] = hex[(* (const unsigned char *) src) >> 4];
- dst[2] = hex[(* (const unsigned char *) src) & 0xf];
- dst += 2;
- }
- }
- *dst = '\0';
- }
- static void print_dir_entry(struct de *de) {
- char size[64], mod[64], href[PATH_MAX];
- if (de->st.is_directory) {
- (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
- } else {
- // We use (signed) cast below because MSVC 6 compiler cannot
- // convert unsigned __int64 to double. Sigh.
- if (de->st.size < 1024) {
- (void) mg_snprintf(de->conn, size, sizeof(size),
- "%lu", (unsigned long) de->st.size);
- } else if (de->st.size < 1024 * 1024) {
- (void) mg_snprintf(de->conn, size, sizeof(size),
- "%.1fk", (double) de->st.size / 1024.0);
- } else if (de->st.size < 1024 * 1024 * 1024) {
- (void) mg_snprintf(de->conn, size, sizeof(size),
- "%.1fM", (double) de->st.size / 1048576);
- } else {
- (void) mg_snprintf(de->conn, size, sizeof(size),
- "%.1fG", (double) de->st.size / 1073741824);
- }
- }
- (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
- url_encode(de->file_name, href, sizeof(href));
- de->conn->num_bytes_sent += mg_printf(de->conn,
- "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
- "<td> %s</td><td> %s</td></tr>\n",
- de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
- de->file_name, de->st.is_directory ? "/" : "", mod, size);
- }
- // This function is called from send_directory() and used for
- // sorting directory entries by size, or name, or modification time.
- // On windows, __cdecl specification is needed in case if project is built
- // with __stdcall convention. qsort always requires __cdels callback.
- static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
- const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
- const char *query_string = a->conn->request_info.query_string;
- int cmp_result = 0;
- if (query_string == NULL) {
- query_string = "na";
- }
- if (a->st.is_directory && !b->st.is_directory) {
- return -1; // Always put directories on top
- } else if (!a->st.is_directory && b->st.is_directory) {
- return 1; // Always put directories on top
- } else if (*query_string == 'n') {
- cmp_result = strcmp(a->file_name, b->file_name);
- } else if (*query_string == 's') {
- cmp_result = a->st.size == b->st.size ? 0 :
- a->st.size > b->st.size ? 1 : -1;
- } else if (*query_string == 'd') {
- cmp_result = a->st.mtime == b->st.mtime ? 0 :
- a->st.mtime > b->st.mtime ? 1 : -1;
- }
- return query_string[1] == 'd' ? -cmp_result : cmp_result;
- }
- static void handle_directory_request(struct mg_connection *conn,
- const char *dir) {
- struct dirent *dp;
- DIR *dirp;
- struct de *entries = NULL;
- char path[PATH_MAX];
- int i, sort_direction, num_entries = 0, arr_size = 128;
- if ((dirp = opendir(dir)) == NULL) {
- send_http_error(conn, 500, "Cannot open directory",
- "Error: opendir(%s): %s", path, strerror(ERRNO));
- return;
- }
- (void) mg_printf(conn, "%s",
- "HTTP/1.1 200 OK\r\n"
- "Connection: close\r\n"
- "Content-Type: text/html; charset=utf-8\r\n\r\n");
- sort_direction = conn->request_info.query_string != NULL &&
- conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
- while ((dp = readdir(dirp)) != NULL) {
- // Do not show current dir and passwords file
- if (!strcmp(dp->d_name, ".") ||
- !strcmp(dp->d_name, "..") ||
- !strcmp(dp->d_name, PASSWORDS_FILE_NAME))
- continue;
- if (entries == NULL || num_entries >= arr_size) {
- arr_size *= 2;
- entries = (struct de *) realloc(entries,
- arr_size * sizeof(entries[0]));
- }
- if (entries == NULL) {
- closedir(dirp);
- send_http_error(conn, 500, "Cannot open directory",
- "%s", "Error: cannot allocate memory");
- return;
- }
- mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
- // If we don't memset stat structure to zero, mtime will have
- // garbage and strftime() will segfault later on in
- // print_dir_entry(). memset is required only if mg_stat()
- // fails. For more details, see
- // http://code.google.com/p/mongoose/issues/detail?id=79
- if (mg_stat(path, &entries[num_entries].st) != 0) {
- memset(&entries[num_entries].st, 0, sizeof(entries[num_entries].st));
- }
- entries[num_entries].conn = conn;
- entries[num_entries].file_name = mg_strdup(dp->d_name);
- num_entries++;
- }
- (void) closedir(dirp);
- conn->num_bytes_sent += mg_printf(conn,
- "<html><head><title>Index of %s</title>"
- "<style>th {text-align: left;}</style></head>"
- "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
- "<tr><th><a href=\"?n%c\">Name</a></th>"
- "<th><a href=\"?d%c\">Modified</a></th>"
- "<th><a href=\"?s%c\">Size</a></th></tr>"
- "<tr><td colspan=\"3\"><hr></td></tr>",
- conn->request_info.uri, conn->request_info.uri,
- sort_direction, sort_direction, sort_direction);
- // Print first entry - link to a parent directory
- conn->num_bytes_sent += mg_printf(conn,
- "<tr><td><a href=\"%s%s\">%s</a></td>"
- "<td> %s</td><td> %s</td></tr>\n",
- conn->request_info.uri, "..", "Parent directory", "-", "-");
- // Sort and print directory entries
- qsort(entries, (size_t)num_entries, sizeof(entries[0]), compare_dir_entries);
- for (i = 0; i < num_entries; i++) {
- print_dir_entry(&entries[i]);
- free(entries[i].file_name);
- }
- free(entries);
- conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
- conn->request_info.status_code = 200;
- }
- // Send len bytes from the opened file to the client.
- static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
- char buf[BUFSIZ];
- int to_read, num_read, num_written;
- while (len > 0) {
- // Calculate how much to read from the file in the buffer
- to_read = sizeof(buf);
- if ((int64_t) to_read > len)
- to_read = (int) len;
- // Read from file, exit the loop on error
- if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
- break;
- // Send read bytes to the client, exit the loop on error
- if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
- break;
- // Both read and were successful, adjust counters
- conn->num_bytes_sent += num_written;
- len -= num_written;
- }
- }
- static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
- return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
- }
- static void handle_file_request(struct mg_connection *conn, const char *path,
- struct mgstat *stp) {
- char date[64], lm[64], etag[64], range[64];
- const char *fmt = "%a, %d %b %Y %H:%M:%S %Z", *msg = "OK", *hdr;
- time_t curtime = time(NULL);
- int64_t cl, r1, r2;
- struct vec mime_vec;
- FILE *fp;
- int n;
- get_mime_type(conn->ctx, path, &mime_vec);
- cl = stp->size;
- conn->request_info.status_code = 200;
- range[0] = '\0';
- if ((fp = mg_fopen(path, "rb")) == NULL) {
- send_http_error(conn, 500, http_500_error,
- "fopen(%s): %s", path, strerror(ERRNO));
- return;
- }
- set_close_on_exec(fileno(fp));
- // If Range: header specified, act accordingly
- r1 = r2 = 0;
- hdr = mg_get_header(conn, "Range");
- if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
- conn->request_info.status_code = 206;
- (void) fseeko(fp, (off_t) r1, SEEK_SET);
- cl = n == 2 ? r2 - r1 + 1: cl - r1;
- (void) mg_snprintf(conn, range, sizeof(range),
- "Content-Range: bytes "
- "%" INT64_FMT "-%"
- INT64_FMT "/%" INT64_FMT "\r\n",
- r1, r1 + cl - 1, stp->size);
- msg = "Partial Content";
- }
- // Prepare Etag, Date, Last-Modified headers
- (void) strftime(date, sizeof(date), fmt, localtime(&curtime));
- (void) strftime(lm, sizeof(lm), fmt, localtime(&stp->mtime));
- (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
- (unsigned long) stp->mtime, (unsigned long) stp->size);
- (void) mg_printf(conn,
- "HTTP/1.1 %d %s\r\n"
- "Date: %s\r\n"
- "Last-Modified: %s\r\n"
- "Etag: \"%s\"\r\n"
- "Content-Type: %.*s\r\n"
- "Content-Length: %" INT64_FMT "\r\n"
- "Connection: %s\r\n"
- "Accept-Ranges: bytes\r\n"
- "%s\r\n",
- conn->request_info.status_code, msg, date, lm, etag,
- mime_vec.len, mime_vec.ptr, cl, suggest_connection_header(conn), range);
- if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
- send_file_data(conn, fp, cl);
- }
- (void) fclose(fp);
- }
- // Parse HTTP headers from the given buffer, advance buffer to the point
- // where parsing stopped.
- static void parse_http_headers(char **buf, struct mg_request_info *ri) {
- int i;
- for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
- ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
- ri->http_headers[i].value = skip(buf, "\r\n");
- if (ri->http_headers[i].name[0] == '\0')
- break;
- ri->num_headers = i + 1;
- }
- }
- static int is_valid_http_method(const char *method) {
- return !strcmp(method, "GET") || !strcmp(method, "POST") ||
- !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
- !strcmp(method, "PUT") || !strcmp(method, "DELETE");
- }
- // Parse HTTP request, fill in mg_request_info structure.
- static int parse_http_request(char *buf, struct mg_request_info *ri) {
- int status = 0;
- // RFC says that all initial whitespaces should be ingored
- while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
- buf++;
- }
- ri->request_method = skip(&buf, " ");
- ri->uri = skip(&buf, " ");
- ri->http_version = skip(&buf, "\r\n");
- if (is_valid_http_method(ri->request_method) &&
- strncmp(ri->http_version, "HTTP/", 5) == 0) {
- ri->http_version += 5; /* Skip "HTTP/" */
- parse_http_headers(&buf, ri);
- status = 1;
- }
- return status;
- }
- // Keep reading the input (either opened file descriptor fd, or socket sock,
- // or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
- // buffer (which marks the end of HTTP request). Buffer buf may already
- // have some data. The length of the data is stored in nread.
- // Upon every read operation, increase nread by the number of bytes read.
- static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
- int *nread) {
- int n, request_len;
- request_len = 0;
- while (*nread < bufsiz && request_len == 0) {
- n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread);
- if (n <= 0) {
- break;
- } else {
- *nread += n;
- request_len = get_request_len(buf, *nread);
- }
- }
- return request_len;
- }
- // For given directory path, substitute it to valid index file.
- // Return 0 if index file has been found, -1 if not found.
- // If the file is found, it's stats is returned in stp.
- static int substitute_index_file(struct mg_connection *conn, char *path,
- size_t path_len, struct mgstat *stp) {
- const char *list = conn->ctx->config[INDEX_FILES];
- struct mgstat st;
- struct vec filename_vec;
- size_t n = strlen(path);
- int found = 0;
- // The 'path' given to us points to the directory. Remove all trailing
- // directory separator characters from the end of the path, and
- // then append single directory separator character.
- while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
- n--;
- }
- path[n] = DIRSEP;
- // Traverse index files list. For each entry, append it to the given
- // path and see if the file exists. If it exists, break the loop
- while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
- // Ignore too long entries that may overflow path buffer
- if (filename_vec.len > path_len - n)
- continue;
- // Prepare full path to the index file
- (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
- // Does it exist?
- if (mg_stat(path, &st) == 0) {
- // Yes it does, break the loop
- *stp = st;
- found = 1;
- break;
- }
- }
- // If no index file exists, restore directory path
- if (!found) {
- path[n] = '\0';
- }
- return found;
- }
- // Return True if we should reply 304 Not Modified.
- static int is_not_modified(const struct mg_connection *conn,
- const struct mgstat *stp) {
- const char *ims = mg_get_header(conn, "If-Modified-Since");
- return ims != NULL && stp->mtime <= parse_date_string(ims);
- }
- static int forward_body_data(struct mg_connection *conn, FILE *fp,
- SOCKET sock, SSL *ssl) {
- const char *expect, *buffered;
- char buf[BUFSIZ];
- int to_read, nread, buffered_len, success = 0;
- expect = mg_get_header(conn, "Expect");
- assert(fp != NULL);
- if (conn->content_len == -1) {
- send_http_error(conn, 411, "Length Required", "");
- } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
- send_http_error(conn, 417, "Expectation Failed", "");
- } else {
- if (expect != NULL) {
- (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
- }
- buffered = conn->buf + conn->request_len;
- buffered_len = conn->data_len - conn->request_len;
- assert(buffered_len >= 0);
- assert(conn->consumed_content == 0);
- if (buffered_len > 0) {
- if ((int64_t) buffered_len > conn->content_len) {
- buffered_len = (int) conn->content_len;
- }
- push(fp, sock, ssl, buffered, (int64_t) buffered_len);
- conn->consumed_content += buffered_len;
- }
- while (conn->consumed_content < conn->content_len) {
- to_read = sizeof(buf);
- if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
- to_read = (int) (conn->content_len - conn->consumed_content);
- }
- nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
- if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
- break;
- }
- conn->consumed_content += nread;
- }
- if (conn->consumed_content == conn->content_len) {
- success = 1;
- }
- // Each error code path in this function must send an error
- if (!success) {
- send_http_error(conn, 577, http_500_error, "");
- }
- }
- return success;
- }
- #if !defined(NO_CGI)
- // This structure helps to create an environment for the spawned CGI program.
- // Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
- // last element must be NULL.
- // However, on Windows there is a requirement that all these VARIABLE=VALUE\0
- // strings must reside in a contiguous buffer. The end of the buffer is
- // marked by two '\0' characters.
- // We satisfy both worlds: we create an envp array (which is vars), all
- // entries are actually pointers inside buf.
- struct cgi_env_block {
- struct mg_connection *conn;
- char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
- int len; // Space taken
- char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
- int nvars; // Number of variables
- };
- // Append VARIABLE=VALUE\0 string to the buffer, and add a respective
- // pointer into the vars array.
- static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
- int n, space;
- char *added;
- va_list ap;
- // Calculate how much space is left in the buffer
- space = sizeof(block->buf) - block->len - 2;
- assert(space >= 0);
- // Make a pointer to the free space int the buffer
- added = block->buf + block->len;
- // Copy VARIABLE=VALUE\0 string into the free space
- va_start(ap, fmt);
- n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
- va_end(ap);
- // Make sure we do not overflow buffer and the envp array
- if (n > 0 && n < space &&
- block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
- // Append a pointer to the added string into the envp array
- block->vars[block->nvars++] = block->buf + block->len;
- // Bump up used length counter. Include \0 terminator
- block->len += n + 1;
- }
- return added;
- }
- static void prepare_cgi_environment(struct mg_connection *conn,
- const char *prog,
- struct cgi_env_block *blk) {
- const char *s, *slash;
- struct vec var_vec, root;
- char *p;
- int i;
- blk->len = blk->nvars = 0;
- blk->conn = conn;
- get_document_root(conn, &root);
- addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
- addenv(blk, "SERVER_ROOT=%.*s", root.len, root.ptr);
- addenv(blk, "DOCUMENT_ROOT=%.*s", root.len, root.ptr);
- // Prepare the environment block
- addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
- addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
- addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
- addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.u.sin.sin_port));
- addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
- addenv(blk, "REMOTE_ADDR=%s",
- inet_ntoa(conn->client.rsa.u.sin.sin_addr));
- addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
- addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
- // SCRIPT_NAME
- assert(conn->request_info.uri[0] == '/');
- slash = strrchr(conn->request_info.uri, '/');
- if ((s = strrchr(prog, '/')) == NULL)
- s = prog;
- addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
- conn->request_info.uri, s);
- addenv(blk, "SCRIPT_FILENAME=%s", prog);
- addenv(blk, "PATH_TRANSLATED=%s", prog);
- addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
- if ((s = mg_get_header(conn, "Content-Type")) != NULL)
- addenv(blk, "CONTENT_TYPE=%s", s);
- if (conn->request_info.query_string != NULL)
- addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
- if ((s = mg_get_header(conn, "Content-Length")) != NULL)
- addenv(blk, "CONTENT_LENGTH=%s", s);
- if ((s = getenv("PATH")) != NULL)
- addenv(blk, "PATH=%s", s);
- #if defined(_WIN32)
- if ((s = getenv("COMSPEC")) != NULL)
- addenv(blk, "COMSPEC=%s", s);
- if ((s = getenv("SYSTEMROOT")) != NULL)
- addenv(blk, "SYSTEMROOT=%s", s);
- #else
- if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
- addenv(blk, "LD_LIBRARY_PATH=%s", s);
- #endif /* _WIN32 */
- if ((s = getenv("PERLLIB")) != NULL)
- addenv(blk, "PERLLIB=%s", s);
- if (conn->request_info.remote_user != NULL) {
- addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
- addenv(blk, "%s", "AUTH_TYPE=Digest");
- }
- // Add all headers as HTTP_* variables
- for (i = 0; i < conn->request_info.num_headers; i++) {
- p = addenv(blk, "HTTP_%s=%s",
- conn->request_info.http_headers[i].name,
- conn->request_info.http_headers[i].value);
- // Convert variable name into uppercase, and change - to _
- for (; *p != '=' && *p != '\0'; p++) {
- if (*p == '-')
- *p = '_';
- *p = (char) toupper(* (unsigned char *) p);
- }
- }
- // Add user-specified variables
- s = conn->ctx->config[CGI_ENVIRONMENT];
- while ((s = next_option(s, &var_vec, NULL)) != NULL) {
- addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
- }
- blk->vars[blk->nvars++] = NULL;
- blk->buf[blk->len++] = '\0';
- assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
- assert(blk->len > 0);
- assert(blk->len < (int) sizeof(blk->buf));
- }
- static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
- int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
- const char *status;
- char buf[BUFSIZ], *pbuf, dir[PATH_MAX], *p;
- struct mg_request_info ri;
- struct cgi_env_block blk;
- FILE *in, *out;
- pid_t pid;
- prepare_cgi_environment(conn, prog, &blk);
- // CGI must be executed in its own directory. 'dir' must point to the
- // directory containing executable program, 'p' must point to the
- // executable program name relative to 'dir'.
- (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
- if ((p = strrchr(dir, DIRSEP)) != NULL) {
- *p++ = '\0';
- } else {
- dir[0] = '.', dir[1] = '\0';
- p = (char *) prog;
- }
- pid = (pid_t) -1;
- fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
- in = out = NULL;
- if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
- send_http_error(conn, 500, http_500_error,
- "Cannot create CGI pipe: %s", strerror(ERRNO));
- goto done;
- } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
- fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
- goto done;
- } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
- (out = fdopen(fd_stdout[0], "rb")) == NULL) {
- send_http_error(conn, 500, http_500_error,
- "fopen: %s", strerror(ERRNO));
- goto done;
- }
- setbuf(in, NULL);
- setbuf(out, NULL);
- // spawn_process() must close those!
- // If we don't mark them as closed, close() attempt before
- // return from this function throws an exception on Windows.
- // Windows does not like when closed descriptor is closed again.
- fd_stdin[0] = fd_stdout[1] = -1;
- // Send POST data to the CGI process if needed
- if (!strcmp(conn->request_info.request_method, "POST") &&
- !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
- goto done;
- }
- // Now read CGI reply into a buffer. We need to set correct
- // status code, thus we need to see all HTTP headers first.
- // Do not send anything back to client, until we buffer in all
- // HTTP headers.
- data_len = 0;
- headers_len = read_request(out, INVALID_SOCKET, NULL,
- buf, sizeof(buf), &data_len);
- if (headers_len <= 0) {
- send_http_error(conn, 500, http_500_error,
- "CGI program sent malformed HTTP headers: [%.*s]",
- data_len, buf);
- goto done;
- }
- pbuf = buf;
- buf[headers_len - 1] = '\0';
- parse_http_headers(&pbuf, &ri);
- // Make up and send the status line
- status = get_header(&ri, "Status");
- conn->request_info.status_code = status == NULL ? 200 : atoi(status);
- (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n", conn->request_info.status_code);
- // Send headers
- for (i = 0; i < ri.num_headers; i++) {
- mg_printf(conn, "%s: %s\r\n",
- ri.http_headers[i].name, ri.http_headers[i].value);
- }
- (void) mg_write(conn, "\r\n", 2);
- // Send chunk of data that may be read after the headers
- conn->num_bytes_sent += mg_write(conn, buf + headers_len,
- (size_t)(data_len - headers_len));
- // Read the rest of CGI output and send to the client
- send_file_data(conn, out, INT64_MAX);
- done:
- if (pid != (pid_t) -1) {
- kill(pid, SIGKILL);
- #if !defined(_WIN32)
- do {} while (waitpid(-1, &i, WNOHANG) > 0);
- #endif
- }
- if (fd_stdin[0] != -1) {
- (void) close(fd_stdin[0]);
- }
- if (fd_stdout[1] != -1) {
- (void) close(fd_stdout[1]);
- }
- if (in != NULL) {
- (void) fclose(in);
- } else if (fd_stdin[1] != -1) {
- (void) close(fd_stdin[1]);
- }
- if (out != NULL) {
- (void) fclose(out);
- } else if (fd_stdout[0] != -1) {
- (void) close(fd_stdout[0]);
- }
- }
- #endif // !NO_CGI
- // For a given PUT path, create all intermediate subdirectories
- // for given path. Return 0 if the path itself is a directory,
- // or -1 on error, 1 if OK.
- static int put_dir(const char *path) {
- char buf[PATH_MAX];
- const char *s, *p;
- struct mgstat st;
- size_t len;
- for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) {
- len = p - path;
- assert(len < sizeof(buf));
- (void) memcpy(buf, path, len);
- buf[len] = '\0';
- // Try to create intermediate directory
- if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
- return -1;
- }
- // Is path itself a directory?
- if (p[1] == '\0') {
- return 0;
- }
- }
- return 1;
- }
- static void put_file(struct mg_connection *conn, const char *path) {
- struct mgstat st;
- const char *range;
- int64_t r1, r2;
- FILE *fp;
- int rc;
- conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
- if ((rc = put_dir(path)) == 0) {
- mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
- } else if (rc == -1) {
- send_http_error(conn, 500, http_500_error,
- "put_dir(%s): %s", path, strerror(ERRNO));
- } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
- send_http_error(conn, 500, http_500_error,
- "fopen(%s): %s", path, strerror(ERRNO));
- } else {
- set_close_on_exec(fileno(fp));
- range = mg_get_header(conn, "Content-Range");
- r1 = r2 = 0;
- if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
- conn->request_info.status_code = 206;
- // TODO(lsm): handle seek error
- (void) fseeko(fp, (off_t) r1, SEEK_SET);
- }
- if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
- (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
- conn->request_info.status_code);
- (void) fclose(fp);
- }
- }
- static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
- static void do_ssi_include(struct mg_connection *conn, const char *ssi,
- char *tag, int include_level) {
- char file_name[BUFSIZ], path[PATH_MAX], *p;
- struct vec root;
- int is_ssi;
- FILE *fp;
- get_document_root(conn, &root);
- // sscanf() is safe here, since send_ssi_file() also uses buffer
- // of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ.
- if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
- // File name is relative to the webserver root
- (void) mg_snprintf(conn, path, sizeof(path), "%.*s%c%s",
- root.len, root.ptr, DIRSEP, file_name);
- } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
- // File name is relative to the webserver working directory
- // or it is absolute system path
- (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
- } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
- // File name is relative to the currect document
- (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
- if ((p = strrchr(path, DIRSEP)) != NULL) {
- p[1] = '\0';
- }
- (void) mg_snprintf(conn, path + strlen(path),
- sizeof(path) - strlen(path), "%s", file_name);
- } else {
- cry(conn, "Bad SSI #include: [%s]", tag);
- return;
- }
- if ((fp = mg_fopen(path, "rb")) == NULL) {
- cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
- tag, path, strerror(ERRNO));
- } else {
- set_close_on_exec(fileno(fp));
- is_ssi = match_extension(path, conn->ctx->config[SSI_EXTENSIONS]);
- if (is_ssi) {
- send_ssi_file(conn, path, fp, include_level + 1);
- } else {
- send_file_data(conn, fp, INT64_MAX);
- }
- (void) fclose(fp);
- }
- }
- #if !defined(NO_POPEN)
- static void do_ssi_exec(struct mg_connection *conn, char *tag) {
- char cmd[BUFSIZ];
- FILE *fp;
- if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
- cry(conn, "Bad SSI #exec: [%s]", tag);
- } else if ((fp = popen(cmd, "r")) == NULL) {
- cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
- } else {
- send_file_data(conn, fp, INT64_MAX);
- (void) pclose(fp);
- }
- }
- #endif // !NO_POPEN
- static void send_ssi_file(struct mg_connection *conn, const char *path,
- FILE *fp, int include_level) {
- char buf[BUFSIZ];
- int ch, len, in_ssi_tag;
- if (include_level > 10) {
- cry(conn, "SSI #include level is too deep (%s)", path);
- return;
- }
- in_ssi_tag = 0;
- len = 0;
- while ((ch = fgetc(fp)) != EOF) {
- if (in_ssi_tag && ch == '>') {
- in_ssi_tag = 0;
- buf[len++] = (char) ch;
- buf[len] = '\0';
- assert(len <= (int) sizeof(buf));
- if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
- // Not an SSI tag, pass it
- (void) mg_write(conn, buf, (size_t)len);
- } else {
- if (!memcmp(buf + 5, "include", 7)) {
- do_ssi_include(conn, path, buf + 12, include_level);
- #if !defined(NO_POPEN)
- } else if (!memcmp(buf + 5, "exec", 4)) {
- do_ssi_exec(conn, buf + 9);
- #endif // !NO_POPEN
- } else {
- cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
- }
- }
- len = 0;
- } else if (in_ssi_tag) {
- if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
- // Not an SSI tag
- in_ssi_tag = 0;
- } else if (len == (int) sizeof(buf) - 2) {
- cry(conn, "%s: SSI tag is too large", path);
- len = 0;
- }
- buf[len++] = ch & 0xff;
- } else if (ch == '<') {
- in_ssi_tag = 1;
- if (len > 0) {
- (void) mg_write(conn, buf, (size_t)len);
- }
- len = 0;
- buf[len++] = ch & 0xff;
- } else {
- buf[len++] = ch & 0xff;
- if (len == (int) sizeof(buf)) {
- (void) mg_write(conn, buf, (size_t)len);
- len = 0;
- }
- }
- }
- // Send the rest of buffered data
- if (len > 0) {
- (void) mg_write(conn, buf, (size_t)len);
- }
- }
- static void handle_ssi_file_request(struct mg_connection *conn,
- const char *path) {
- FILE *fp;
- if ((fp = mg_fopen(path, "rb")) == NULL) {
- send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
- strerror(ERRNO));
- } else {
- set_close_on_exec(fileno(fp));
- mg_printf(conn, "HTTP/1.1 200 OK\r\n"
- "Content-Type: text/html\r\nConnection: %s\r\n\r\n",
- suggest_connection_header(conn));
- send_ssi_file(conn, path, fp, 0);
- (void) fclose(fp);
- }
- }
- // This is the heart of the Mongoose's logic.
- // This function is called when the request is read, parsed and validated,
- // and Mongoose must decide what action to take: serve a file, or
- // a directory, or call embedded function, etcetera.
- static void handle_request(struct mg_connection *conn) {
- struct mg_request_info *ri = &conn->request_info;
- char path[PATH_MAX];
- int uri_len;
- struct mgstat st;
- if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
- * conn->request_info.query_string++ = '\0';
- }
- uri_len = strlen(ri->uri);
- (void) url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
- remove_double_dots_and_double_slashes(ri->uri);
- convert_uri_to_file_name(conn, ri->uri, path, sizeof(path));
- DEBUG_TRACE(("%s", ri->uri));
- if (!check_authorization(conn, path)) {
- send_authorization_request(conn);
- } else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
- // Do nothing, callback has served the request
- } else if (strstr(path, PASSWORDS_FILE_NAME)) {
- // Do not allow to view passwords files
- send_http_error(conn, 403, "Forbidden", "Access Forbidden");
- } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
- send_http_error(conn, 404, "Not Found", "Not Found");
- } else if ((!strcmp(ri->request_method, "PUT") ||
- !strcmp(ri->request_method, "DELETE")) &&
- (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
- !is_authorized_for_put(conn))) {
- send_authorization_request(conn);
- } else if (!strcmp(ri->request_method, "PUT")) {
- put_file(conn, path);
- } else if (!strcmp(ri->request_method, "DELETE")) {
- if (mg_remove(path) == 0) {
- send_http_error(conn, 200, "OK", "");
- } else {
- send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
- strerror(ERRNO));
- }
- } else if (mg_stat(path, &st) != 0) {
- send_http_error(conn, 404, "Not Found", "%s", "File not found");
- } else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
- (void) mg_printf(conn,
- "HTTP/1.1 301 Moved Permanently\r\n"
- "Location: %s/\r\n\r\n", ri->uri);
- } else if (st.is_directory &&
- !substitute_index_file(conn, path, sizeof(path), &st)) {
- if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
- handle_directory_request(conn, path);
- } else {
- send_http_error(conn, 403, "Directory Listing Denied",
- "Directory listing denied");
- }
- } else if (match_extension(path, conn->ctx->config[CGI_EXTENSIONS])) {
- if (strcmp(ri->request_method, "POST") &&
- strcmp(ri->request_method, "GET")) {
- send_http_error(conn, 501, "Not Implemented",
- "Method %s is not implemented", ri->request_method);
- } else {
- handle_cgi_request(conn, path);
- }
- } else if (match_extension(path, conn->ctx->config[SSI_EXTENSIONS])) {
- handle_ssi_file_request(conn, path);
- } else if (is_not_modified(conn, &st)) {
- send_http_error(conn, 304, "Not Modified", "");
- } else {
- handle_file_request(conn, path, &st);
- }
- }
- static void close_all_listening_sockets(struct mg_context *ctx) {
- struct socket *sp, *tmp;
- for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
- tmp = sp->next;
- (void) closesocket(sp->sock);
- free(sp);
- }
- }
- // Valid listening port specification is: [ip_address:]port[s|p]
- // Examples: 80, 443s, 127.0.0.1:3128p, 1.2.3.4:8080sp
- static int parse_port_string(const struct vec *vec, struct socket *so) {
- struct usa *usa = &so->lsa;
- int a, b, c, d, port, len;
- // MacOS needs that. If we do not zero it, subsequent bind() will fail.
- memset(so, 0, sizeof(*so));
- if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
- // IP address to bind to is specified
- usa->u.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
- } else if (sscanf(vec->ptr, "%d%n", &port, &len) == 1) {
- // Only port number is specified. Bind to all addresses
- usa->u.sin.sin_addr.s_addr = htonl(INADDR_ANY);
- } else {
- return 0;
- }
- assert(len > 0 && len <= (int) vec->len);
- if (strchr("sp,", vec->ptr[len]) == NULL) {
- return 0;
- }
- so->is_ssl = vec->ptr[len] == 's';
- so->is_proxy = vec->ptr[len] == 'p';
- usa->len = sizeof(usa->u.sin);
- usa->u.sin.sin_family = AF_INET;
- usa->u.sin.sin_port = htons((uint16_t) port);
- return 1;
- }
- static int set_ports_option(struct mg_context *ctx) {
- const char *list = ctx->config[LISTENING_PORTS];
- int reuseaddr = 1, success = 1;
- SOCKET sock;
- struct vec vec;
- struct socket so, *listener;
- while (success && (list = next_option(list, &vec, NULL)) != NULL) {
- if (!parse_port_string(&vec, &so)) {
- cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
- __func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
- success = 0;
- } else if (so.is_ssl && ctx->ssl_ctx == NULL) {
- cry(fc(ctx), "Cannot add SSL socket, is -ssl_cert option set?");
- success = 0;
- } else if ((sock = socket(PF_INET, SOCK_STREAM, 6)) == INVALID_SOCKET ||
- #if !defined(_WIN32)
- // On Windows, SO_REUSEADDR is recommended only for
- // broadcast UDP sockets
- setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
- sizeof(reuseaddr)) != 0 ||
- #endif // !_WIN32
- bind(sock, &so.lsa.u.sa, so.lsa.len) != 0 ||
- listen(sock, 20) != 0) {
- closesocket(sock);
- cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
- vec.len, vec.ptr, strerror(ERRNO));
- success = 0;
- } else if ((listener = (struct socket *)
- calloc(1, sizeof(*listener))) == NULL) {
- closesocket(sock);
- cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
- success = 0;
- } else {
- *listener = so;
- listener->sock = sock;
- set_close_on_exec(listener->sock);
- listener->next = ctx->listening_sockets;
- ctx->listening_sockets = listener;
- }
- }
- if (!success) {
- close_all_listening_sockets(ctx);
- }
- return success;
- }
- static void log_header(const struct mg_connection *conn, const char *header,
- FILE *fp) {
- const char *header_value;
- if ((header_value = mg_get_header(conn, header)) == NULL) {
- (void) fprintf(fp, "%s", " -");
- } else {
- (void) fprintf(fp, " \"%s\"", header_value);
- }
- }
- static void log_access(const struct mg_connection *conn) {
- const struct mg_request_info *ri;
- FILE *fp;
- char date[64];
- fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL :
- mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
- if (fp == NULL)
- return;
- (void) strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
- localtime(&conn->birth_time));
- ri = &conn->request_info;
- flockfile(fp);
- (void) fprintf(fp,
- "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
- inet_ntoa(conn->client.rsa.u.sin.sin_addr),
- ri->remote_user == NULL ? "-" : ri->remote_user,
- date,
- ri->request_method ? ri->request_method : "-",
- ri->uri ? ri->uri : "-",
- ri->http_version,
- conn->request_info.status_code, conn->num_bytes_sent);
- log_header(conn, "Referer", fp);
- log_header(conn, "User-Agent", fp);
- (void) fputc('\n', fp);
- (void) fflush(fp);
- funlockfile(fp);
- (void) fclose(fp);
- }
- static int isbyte(int n) {
- return n >= 0 && n <= 255;
- }
- // Verify given socket address against the ACL.
- // Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
- static int check_acl(struct mg_context *ctx, const struct usa *usa) {
- int a, b, c, d, n, mask, allowed;
- char flag;
- uint32_t acl_subnet, acl_mask, remote_ip;
- struct vec vec;
- const char *list = ctx->config[ACCESS_CONTROL_LIST];
- if (list == NULL) {
- return 1;
- }
- (void) memcpy(&remote_ip, &usa->u.sin.sin_addr, sizeof(remote_ip));
- // If any ACL is set, deny by default
- allowed = '-';
- while ((list = next_option(list, &vec, NULL)) != NULL) {
- mask = 32;
- if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
- cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
- return -1;
- } else if (flag != '+' && flag != '-') {
- cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
- return -1;
- } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
- cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
- return -1;
- } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
- // Do nothing, no mask specified
- } else if (mask < 0 || mask > 32) {
- cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
- return -1;
- }
- acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
- acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
- if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
- allowed = flag;
- }
- }
- return allowed == '+';
- }
- static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
- FD_SET(fd, set);
- if (fd > (SOCKET) *max_fd) {
- *max_fd = (int) fd;
- }
- }
- #if !defined(_WIN32)
- static int set_uid_option(struct mg_context *ctx) {
- struct passwd *pw;
- const char *uid = ctx->config[RUN_AS_USER];
- int success = 0;
- if (uid == NULL) {
- success = 1;
- } else {
- if ((pw = getpwnam(uid)) == NULL) {
- cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
- } else if (setgid(pw->pw_gid) == -1) {
- cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
- } else if (setuid(pw->pw_uid) == -1) {
- cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
- } else {
- success = 1;
- }
- }
- return success;
- }
- #endif // !_WIN32
- #if !defined(NO_SSL)
- static pthread_mutex_t *ssl_mutexes;
- static void ssl_locking_callback(int mode, int mutex_num, const char *file,
- int line) {
- line = 0; // Unused
- file = NULL; // Unused
- if (mode & CRYPTO_LOCK) {
- (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
- } else {
- (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
- }
- }
- static unsigned long ssl_id_callback(void) {
- return (unsigned long) pthread_self();
- }
- #if !defined(NO_SSL_DL)
- static int load_dll(struct mg_context *ctx, const char *dll_name,
- struct ssl_func *sw) {
- union {void *p; void (*fp)(void);} u;
- void *dll_handle;
- struct ssl_func *fp;
- if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
- cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
- return 0;
- }
- for (fp = sw; fp->name != NULL; fp++) {
- #ifdef _WIN32
- // GetProcAddress() returns pointer to function
- u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
- #else
- // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
- // function pointers. We need to use a union to make a cast.
- u.p = dlsym(dll_handle, fp->name);
- #endif /* _WIN32 */
- if (u.fp == NULL) {
- cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
- return 0;
- } else {
- fp->ptr = u.fp;
- }
- }
- return 1;
- }
- #endif // NO_SSL_DL
- // Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
- static int set_ssl_option(struct mg_context *ctx) {
- struct mg_request_info request_info;
- SSL_CTX *CTX;
- int i, size;
- const char *pem = ctx->config[SSL_CERTIFICATE];
- const char *chain = ctx->config[SSL_CHAIN_FILE];
- if (pem == NULL) {
- return 1;
- }
- #if !defined(NO_SSL_DL)
- if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
- !load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
- return 0;
- }
- #endif // NO_SSL_DL
- // Initialize SSL crap
- SSL_library_init();
- SSL_load_error_strings();
- if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) {
- cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
- } else if (ctx->user_callback != NULL) {
- memset(&request_info, 0, sizeof(request_info));
- request_info.user_data = ctx->user_data;
- ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX,
- &request_info);
- }
- if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem,
- SSL_FILETYPE_PEM) == 0) {
- cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
- return 0;
- } else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem,
- SSL_FILETYPE_PEM) == 0) {
- cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error());
- return 0;
- }
- if (CTX != NULL && chain != NULL &&
- SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) {
- cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error());
- return 0;
- }
- // Initialize locking callbacks, needed for thread safety.
- // http://www.openssl.org/support/faq.html#PROG1
- size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
- if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
- cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
- return 0;
- }
- for (i = 0; i < CRYPTO_num_locks(); i++) {
- pthread_mutex_init(&ssl_mutexes[i], NULL);
- }
- CRYPTO_set_locking_callback(&ssl_locking_callback);
- CRYPTO_set_id_callback(&ssl_id_callback);
- // Done with everything. Save the context.
- ctx->ssl_ctx = CTX;
- return 1;
- }
- #endif // !NO_SSL
- static int set_gpass_option(struct mg_context *ctx) {
- struct mgstat mgstat;
- const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
- return path == NULL || mg_stat(path, &mgstat) == 0;
- }
- static int set_acl_option(struct mg_context *ctx) {
- struct usa fake;
- return check_acl(ctx, &fake) != -1;
- }
- static void reset_per_request_attributes(struct mg_connection *conn) {
- struct mg_request_info *ri = &conn->request_info;
- // Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
- if (ri->remote_user != NULL) {
- free((void *) ri->remote_user);
- }
- ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL;
- ri->num_headers = 0;
- ri->status_code = -1;
- conn->num_bytes_sent = conn->consumed_content = 0;
- conn->content_len = -1;
- conn->request_len = conn->data_len = 0;
- }
- static void close_socket_gracefully(SOCKET sock) {
- char buf[BUFSIZ];
- int n;
- // Send FIN to the client
- (void) shutdown(sock, SHUT_WR);
- set_non_blocking_mode(sock);
- // Read and discard pending data. If we do not do that and close the
- // socket, the data in the send buffer may be discarded. This
- // behaviour is seen on Windows, when client keeps sending data
- // when server decide to close the connection; then when client
- // does recv() it gets no data back.
- do {
- n = pull(NULL, sock, NULL, buf, sizeof(buf));
- } while (n > 0);
- // Now we know that our FIN is ACK-ed, safe to close
- (void) closesocket(sock);
- }
- static void close_connection(struct mg_connection *conn) {
- if (conn->ssl) {
- SSL_free(conn->ssl);
- conn->ssl = NULL;
- }
- if (conn->client.sock != INVALID_SOCKET) {
- close_socket_gracefully(conn->client.sock);
- }
- }
- static void discard_current_request_from_buffer(struct mg_connection *conn) {
- char *buffered;
- int buffered_len, body_len;
- buffered = conn->buf + conn->request_len;
- buffered_len = conn->data_len - conn->request_len;
- assert(buffered_len >= 0);
- if (conn->content_len == -1) {
- body_len = 0;
- } else if (conn->content_len < (int64_t) buffered_len) {
- body_len = (int) conn->content_len;
- } else {
- body_len = buffered_len;
- }
- conn->data_len -= conn->request_len + body_len;
- memmove(conn->buf, conn->buf + conn->request_len + body_len,
- (size_t) conn->data_len);
- }
- static int parse_url(const char *url, char *host, int *port) {
- int len;
- if (sscanf(url, "%*[htps]://%1024[^:]:%d%n", host, port, &len) == 2 ||
- sscanf(url, "%1024[^:]:%d%n", host, port, &len) == 2) {
- } else if (sscanf(url, "%*[htps]://%1024[^/]%n", host, &len) == 1) {
- *port = 80;
- } else {
- sscanf(url, "%1024[^/]%n", host, &len);
- *port = 80;
- }
- DEBUG_TRACE(("Host:%s, port:%d", host, *port));
- return len;
- }
- static void handle_proxy_request(struct mg_connection *conn) {
- struct mg_request_info *ri = &conn->request_info;
- char host[1025], buf[BUFSIZ];
- int port, is_ssl, len, i, n;
- DEBUG_TRACE(("URL: %s", ri->uri));
- if (conn->request_info.uri[0] == '/' ||
- (ri->uri == NULL || (len = parse_url(ri->uri, host, &port))) == 0) {
- return;
- }
- if (conn->peer == NULL) {
- is_ssl = !strcmp(ri->request_method, "CONNECT");
- if ((conn->peer = mg_connect(conn, host, port, is_ssl)) == NULL) {
- return;
- }
- conn->peer->client.is_ssl = is_ssl;
- }
- // Forward client's request to the target
- mg_printf(conn->peer, "%s %s HTTP/%s\r\n", ri->request_method, ri->uri + len,
- ri->http_version);
- // And also all headers. TODO(lsm): anonymize!
- for (i = 0; i < ri->num_headers; i++) {
- mg_printf(conn->peer, "%s: %s\r\n", ri->http_headers[i].name,
- ri->http_headers[i].value);
- }
- // End of headers, final newline
- mg_write(conn->peer, "\r\n", 2);
- // Read and forward body data if any
- if (!strcmp(ri->request_method, "POST")) {
- forward_body_data(conn, NULL, conn->peer->client.sock, conn->peer->ssl);
- }
- // Read data from the target and forward it to the client
- while ((n = pull(NULL, conn->peer->client.sock, conn->peer->ssl,
- buf, sizeof(buf))) > 0) {
- if (mg_write(conn, buf, (size_t)n) != n) {
- break;
- }
- }
- if (!conn->peer->client.is_ssl) {
- close_connection(conn->peer);
- free(conn->peer);
- conn->peer = NULL;
- }
- }
- static int is_valid_uri(const char *uri) {
- // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
- // URI can be an asterisk (*) or should start with slash.
- return (uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'));
- }
- static void process_new_connection(struct mg_connection *conn) {
- struct mg_request_info *ri = &conn->request_info;
- int keep_alive_enabled;
- const char *cl;
- keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
- do {
- reset_per_request_attributes(conn);
- // If next request is not pipelined, read it in
- if ((conn->request_len = get_request_len(conn->buf, conn->data_len)) == 0) {
- conn->request_len = read_request(NULL, conn->client.sock, conn->ssl,
- conn->buf, conn->buf_size, &conn->data_len);
- }
- assert(conn->data_len >= conn->request_len);
- if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
- send_http_error(conn, 413, "Request Too Large", "");
- return;
- } if (conn->request_len <= 0) {
- return; // Remote end closed the connection
- }
- // Nul-terminate the request cause parse_http_request() uses sscanf
- conn->buf[conn->request_len - 1] = '\0';
- if (!parse_http_request(conn->buf, ri) ||
- (!conn->client.is_proxy && !is_valid_uri(ri->uri))) {
- // Do not put garbage in the access log, just send it back to the client
- send_http_error(conn, 400, "Bad Request",
- "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
- } else if (strcmp(ri->http_version, "1.0") &&
- strcmp(ri->http_version, "1.1")) {
- // Request seems valid, but HTTP version is strange
- send_http_error(conn, 505, "HTTP version not supported", "");
- log_access(conn);
- } else {
- // Request is valid, handle it
- cl = get_header(ri, "Content-Length");
- conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
- conn->birth_time = time(NULL);
- if (conn->client.is_proxy) {
- handle_proxy_request(conn);
- } else {
- handle_request(conn);
- }
- log_access(conn);
- discard_current_request_from_buffer(conn);
- }
- // conn->peer is not NULL only for SSL-ed proxy connections
- } while (conn->peer || (keep_alive_enabled && should_keep_alive(conn)));
- }
- // Worker threads take accepted socket from the queue
- static int consume_socket(struct mg_context *ctx, struct socket *sp) {
- (void) pthread_mutex_lock(&ctx->mutex);
- DEBUG_TRACE(("going idle"));
- // If the queue is empty, wait. We're idle at this point.
- while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
- pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
- }
- // Master thread could wake us up without putting a socket.
- // If this happens, it is time to exit.
- if (ctx->stop_flag) {
- (void) pthread_mutex_unlock(&ctx->mutex);
- return 0;
- }
- assert(ctx->sq_head > ctx->sq_tail);
- // Copy socket from the queue and increment tail
- *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
- ctx->sq_tail++;
- DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
- // Wrap pointers if needed
- while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
- ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
- ctx->sq_head -= ARRAY_SIZE(ctx->queue);
- }
- (void) pthread_cond_signal(&ctx->sq_empty);
- (void) pthread_mutex_unlock(&ctx->mutex);
- return 1;
- }
- static void worker_thread(struct mg_context *ctx) {
- struct mg_connection *conn;
- int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
- conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size);
- conn->buf_size = buf_size;
- conn->buf = (char *) (conn + 1);
- assert(conn != NULL);
- while (ctx->stop_flag == 0 && consume_socket(ctx, &conn->client)) {
- conn->birth_time = time(NULL);
- conn->ctx = ctx;
- // Fill in IP, port info early so even if SSL setup below fails,
- // error handler would have the corresponding info.
- // Thanks to Johannes Winkelmann for the patch.
- conn->request_info.remote_port = ntohs(conn->client.rsa.u.sin.sin_port);
- memcpy(&conn->request_info.remote_ip,
- &conn->client.rsa.u.sin.sin_addr.s_addr, 4);
- conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
- conn->request_info.is_ssl = conn->client.is_ssl;
- if (!conn->client.is_ssl ||
- (conn->client.is_ssl && sslize(conn, SSL_accept))) {
- process_new_connection(conn);
- }
- close_connection(conn);
- }
- free(conn);
- // Signal master that we're done with connection and exiting
- (void) pthread_mutex_lock(&ctx->mutex);
- ctx->num_threads--;
- (void) pthread_cond_signal(&ctx->cond);
- assert(ctx->num_threads >= 0);
- (void) pthread_mutex_unlock(&ctx->mutex);
- DEBUG_TRACE(("exiting"));
- }
- // Master thread adds accepted socket to a queue
- static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
- (void) pthread_mutex_lock(&ctx->mutex);
- // If the queue is full, wait
- while (ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
- (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
- }
- assert(ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue));
- // Copy socket to the queue and increment head
- ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
- ctx->sq_head++;
- DEBUG_TRACE(("queued socket %d", sp->sock));
- (void) pthread_cond_signal(&ctx->sq_full);
- (void) pthread_mutex_unlock(&ctx->mutex);
- }
- static void accept_new_connection(const struct socket *listener,
- struct mg_context *ctx) {
- struct socket accepted;
- int allowed;
- accepted.rsa.len = sizeof(accepted.rsa.u.sin);
- accepted.lsa = listener->lsa;
- accepted.sock = accept(listener->sock, &accepted.rsa.u.sa, &accepted.rsa.len);
- if (accepted.sock != INVALID_SOCKET) {
- allowed = check_acl(ctx, &accepted.rsa);
- if (allowed) {
- // Put accepted socket structure into the queue
- DEBUG_TRACE(("accepted socket %d", accepted.sock));
- accepted.is_ssl = listener->is_ssl;
- accepted.is_proxy = listener->is_proxy;
- produce_socket(ctx, &accepted);
- } else {
- cry(fc(ctx), "%s: %s is not allowed to connect",
- __func__, inet_ntoa(accepted.rsa.u.sin.sin_addr));
- (void) closesocket(accepted.sock);
- }
- }
- }
- static void master_thread(struct mg_context *ctx) {
- fd_set read_set;
- struct timeval tv;
- struct socket *sp;
- int max_fd;
- while (ctx->stop_flag == 0) {
- FD_ZERO(&read_set);
- max_fd = -1;
- // Add listening sockets to the read set
- for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
- add_to_set(sp->sock, &read_set, &max_fd);
- }
- tv.tv_sec = 0;
- tv.tv_usec = 200 * 1000;
- if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
- #ifdef _WIN32
- // On windows, if read_set and write_set are empty,
- // select() returns "Invalid parameter" error
- // (at least on my Windows XP Pro). So in this case, we sleep here.
- sleep(1);
- #endif // _WIN32
- } else {
- for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
- if (FD_ISSET(sp->sock, &read_set)) {
- accept_new_connection(sp, ctx);
- }
- }
- }
- }
- DEBUG_TRACE(("stopping workers"));
- // Stop signal received: somebody called mg_stop. Quit.
- close_all_listening_sockets(ctx);
- // Wakeup workers that are waiting for connections to handle.
- pthread_cond_broadcast(&ctx->sq_full);
- // Wait until all threads finish
- (void) pthread_mutex_lock(&ctx->mutex);
- while (ctx->num_threads > 0) {
- (void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
- }
- (void) pthread_mutex_unlock(&ctx->mutex);
- // All threads exited, no sync is needed. Destroy mutex and condvars
- (void) pthread_mutex_destroy(&ctx->mutex);
- (void) pthread_cond_destroy(&ctx->cond);
- (void) pthread_cond_destroy(&ctx->sq_empty);
- (void) pthread_cond_destroy(&ctx->sq_full);
- // Signal mg_stop() that we're done
- ctx->stop_flag = 2;
- DEBUG_TRACE(("exiting"));
- }
- static void free_context(struct mg_context *ctx) {
- int i;
- // Deallocate config parameters
- for (i = 0; i < NUM_OPTIONS; i++) {
- if (ctx->config[i] != NULL)
- free(ctx->config[i]);
- }
- // Deallocate SSL context
- if (ctx->ssl_ctx != NULL) {
- SSL_CTX_free(ctx->ssl_ctx);
- }
- #ifndef NO_SSL
- if (ssl_mutexes != NULL) {
- free(ssl_mutexes);
- }
- #endif // !NO_SSL
- // Deallocate context itself
- free(ctx);
- }
- void mg_stop(struct mg_context *ctx) {
- ctx->stop_flag = 1;
- // Wait until mg_fini() stops
- while (ctx->stop_flag != 2) {
- (void) sleep(0);
- }
- free_context(ctx);
- #if defined(_WIN32) && !defined(__SYMBIAN32__)
- (void) WSACleanup();
- #endif // _WIN32
- }
- struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
- const char **options) {
- struct mg_context *ctx;
- const char *name, *value, *default_value;
- int i;
- #if defined(_WIN32) && !defined(__SYMBIAN32__)
- WSADATA data;
- WSAStartup(MAKEWORD(2,2), &data);
- #endif // _WIN32
- // Allocate context and initialize reasonable general case defaults.
- // TODO(lsm): do proper error handling here.
- ctx = (struct mg_context *) calloc(1, sizeof(*ctx));
- ctx->user_callback = user_callback;
- ctx->user_data = user_data;
- while (options && (name = *options++) != NULL) {
- if ((i = get_option_index(name)) == -1) {
- cry(fc(ctx), "Invalid option: %s", name);
- free_context(ctx);
- return NULL;
- } else if ((value = *options++) == NULL) {
- cry(fc(ctx), "%s: option value cannot be NULL", name);
- free_context(ctx);
- return NULL;
- }
- ctx->config[i] = mg_strdup(value);
- DEBUG_TRACE(("[%s] -> [%s]", name, value));
- }
- // Set default value if needed
- for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
- default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
- if (ctx->config[i] == NULL && default_value != NULL) {
- ctx->config[i] = mg_strdup(default_value);
- DEBUG_TRACE(("Setting default: [%s] -> [%s]",
- config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
- default_value));
- }
- }
- // NOTE(lsm): order is important here. SSL certificates must
- // be initialized before listening ports. UID must be set last.
- if (!set_gpass_option(ctx) ||
- #if !defined(NO_SSL)
- !set_ssl_option(ctx) ||
- #endif
- !set_ports_option(ctx) ||
- #if !defined(_WIN32)
- !set_uid_option(ctx) ||
- #endif
- !set_acl_option(ctx)) {
- free_context(ctx);
- return NULL;
- }
- #if !defined(_WIN32) && !defined(__SYMBIAN32__)
- // Ignore SIGPIPE signal, so if browser cancels the request, it
- // won't kill the whole process.
- (void) signal(SIGPIPE, SIG_IGN);
- #endif // !_WIN32
- (void) pthread_mutex_init(&ctx->mutex, NULL);
- (void) pthread_cond_init(&ctx->cond, NULL);
- (void) pthread_cond_init(&ctx->sq_empty, NULL);
- (void) pthread_cond_init(&ctx->sq_full, NULL);
- // Start master (listening) thread
- start_thread(ctx, (mg_thread_func_t) master_thread, ctx);
- // Start worker threads
- for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
- if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
- cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
- } else {
- ctx->num_threads++;
- }
- }
- return ctx;
- }
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