Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <string.h>
- #include <unistd.h>
- #define MAXLINE 4096 /*max text line length*/
- #define SERV_PORT 3000 /*port*/
- #define LISTENQ 8 /*maximum number of client connections */
- int main (int argc, char **argv)
- {
- int listenfd, connfd, n;
- socklen_t clilen;
- char buf[MAXLINE];
- struct sockaddr_in cliaddr, servaddr;
- //creation of the socket
- listenfd = socket (AF_INET, SOCK_STREAM, 0);
- //preparation of the socket address
- servaddr.sin_family = AF_INET;
- servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
- servaddr.sin_port = htons(SERV_PORT);
- bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
- listen(listenfd, LISTENQ);
- printf("%sn","Server running...waiting for connections.");
- for ( ; ; ) {
- clilen = sizeof(cliaddr);
- connfd = accept(listenfd, (struct sockaddr *) &cliaddr, &clilen);
- printf("%sn","Received request...");
- while ( (n = recv(connfd, buf, MAXLINE,0)) > 0) {
- printf("%s","String received from and resent to the client:");
- puts(buf);
- send(connfd, buf, n, 0);
- }
- if (n < 0) {
- perror("Read error");
- exit(1);
- }
- close(connfd);
- }
- //close listening socket
- close(listenfd);
- }
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <string.h>
- #include <arpa/inet.h>
- #define MAXLINE 4096 /*max text line length*/
- #define SERV_PORT 3000 /*port*/
- int
- main(int argc, char **argv)
- {
- int sockfd;
- struct sockaddr_in servaddr;
- char sendline[MAXLINE], recvline[MAXLINE];
- //basic check of the arguments
- //additional checks can be inserted
- if (argc !=2) {
- perror("Usage: TCPClient <IP address of the server");
- exit(1);
- }
- //Create a socket for the client
- //If sockfd<0 there was an error in the creation of the socket
- if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) <0) {
- perror("Problem in creating the socket");
- exit(2);
- }
- //Creation of the socket
- memset(&servaddr, 0, sizeof(servaddr));
- servaddr.sin_family = AF_INET;
- servaddr.sin_addr.s_addr= inet_addr(argv[1]);
- servaddr.sin_port = htons(SERV_PORT); //convert to big-endian order
- //Connection of the client to the socket
- if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr))<0) {
- perror("Problem in connecting to the server");
- exit(3);
- }
- while (fgets(sendline, MAXLINE, stdin) != NULL) {
- send(sockfd, sendline, strlen(sendline), 0);
- if (recv(sockfd, recvline, MAXLINE,0) == 0){
- //error: server terminated prematurely
- perror("The server terminated prematurely");
- exit(4);
- }
- printf("%s", "String received from the server: ");
- fputs(recvline, stdout);
- }
- exit(0);
- }
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <string.h>
- #include <arpa/inet.h>
- #define MAXLINE 4096 /*max text line length*/
- #define SERV_PORT 3000 /*port*/
- int
- main(int argc, char **argv)
- {
- int sockfd;
- struct sockaddr_in servaddr;
- char sendline[MAXLINE], recvline[MAXLINE], buffer [256];
- //Añadidas por mi//
- float a, b, c;
- a = 0;
- b = 0;
- c = 0;
- c = a + b;
- printf("nPrimer numero: ");
- scanf("%f", &a);
- printf ("nSegundo numero: ");
- scanf ("%f", &b);
- sprintf(buffer, "%f", sizeof c, c);
- unsigned char len = strlen(buffer);
- //basic check of the arguments
- //additional checks can be inserted
- if (argc !=2) {
- perror("Usage: TCPClient <IP address of the server");
- exit(1);
- }
- //Create a socket for the client
- //If sockfd<0 there was an error in the creation of the socket
- if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) <0) {
- perror("Problem in creating the socket");
- exit(2);
- }
- //Creation of the socket
- memset(&servaddr, 0, sizeof(servaddr));
- servaddr.sin_family = AF_INET;
- servaddr.sin_addr.s_addr= inet_addr(argv[1]);
- servaddr.sin_port = htons(SERV_PORT); //convert to big-endian order
- //Connection of the client to the socket
- if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr))<0) {
- perror("Problem in connecting to the server");
- exit(3);
- }
- while (fgets(sendline, MAXLINE, stdin) != NULL) {
- send(sockfd, sendline, strlen(sendline), 0);
- send(sockfd, &len, sizeof len, 0);
- send (sockfd, buffer, sizeof buffer, 0);
- if (recv(sockfd, recvline, MAXLINE,0) == 0){
- //error: server terminated prematurely
- perror("The server terminated prematurely");
- exit(4);
- }
- printf("%s", "String received from the server: ");
- fputs(recvline, stdout);
- }
- exit(0);
- }
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <string.h>
- #include <unistd.h>
- #define MAXLINE 4096 /*max text line length*/
- #define SERV_PORT 3000 /*port*/
- #define LISTENQ 8 /*maximum number of client connections */
- int main (int argc, char **argv)
- {
- float c;
- int listenfd, connfd, n;
- socklen_t clilen;
- char buf[MAXLINE], buf256[256], buffer[256];
- unsigned char len = strlen(buffer);
- struct sockaddr_in cliaddr, servaddr;
- //creation of the socket
- listenfd = socket (AF_INET, SOCK_STREAM, 0);
- //preparation of the socket address
- servaddr.sin_family = AF_INET;
- servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
- servaddr.sin_port = htons(SERV_PORT);
- bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
- listen(listenfd, LISTENQ);
- printf("%sn","Server running...waiting for connections.");
- for ( ; ; ) {
- clilen = sizeof(cliaddr);
- connfd = accept(listenfd, (struct sockaddr *) &cliaddr, &clilen);
- printf("%sn","Received request...");
- while ( (n = recv(connfd, buf, MAXLINE,0)) > 0) {
- printf("%s","String received from and resent to the client:");
- puts(buf);
- recv(connfd, &len, sizeof len, 0);
- recv(connfd, buf256, len, 0);
- recv(connfd, buffer, 256, 0);
- buf256[len] = 0;
- sscanf(buffer, "%f", &c);
- puts(buffer);
- printf ("n%f", &c);
- send(connfd, buf, n, 0);
- }
- if (n < 0) {
- perror("Read error");
- exit(1);
- }
- close(connfd);
- }
- //close listening socket
- close(listenfd);
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement