unix domain socket示例一(SOCK_DGRAM)

unix domain socket示例一(SOCK_DGRAM) unix domain socket 是ipC通信的一种方式，可用于与管理进程间通信，同时由和网络socket统一，所以很好管理，使用还是比较多。现举个例子：

server.c

1 #include <stdio.h> 2 #include <string.h> 3 #include <unistd.h> 4 #include <stdlib.h> 5 #include <sys/types.h> 6 #include <sys/socket.h> 7 #include <sys/un.h> 8 #include <stddef.h> 9 10 #define SRC_ADDR "/var/run/uds_test.socket"11 12 int main (int argc, char **argv)13 {14 int sockfd;15 struct sockaddr_un src;16 int ret;17 18 unlink (SRC_ADDR);19 sockfd = socket (AF_UNIX, SOCK_DGRAM, 0);20 if (sockfd < 0) {21 perror ("create socket failed");22 exit (EXIT_FAILURE);23 }24 25 memset (&src, 0, sizeof (src));26 src.sun_family = AF_UNIX;27 strcpy (src.sun_path, SRC_ADDR);28 int len;29 len = offsetof (struct sockaddr_un, sun_path) +30 sizeof (SRC_ADDR);31 32 if (bind (sockfd, (struct sockaddr *)&src, len) < 0) {33 perror ("bind socket failed");34 exit (EXIT_FAILURE);35 }36 37 size_t size = 0;38 char buf[BUFSIZ] ={'\0'};39 for (;;) {40 size = recvfrom (sockfd,buf, BUFSIZ,0,41 NULL, NULL);42 43 if (size > 0)44 PRintf ("recv: %s\n", buf);45 46 }47 48 return 0;49 }

client.c

#include <stdio.h>#include <string.h>#include <unistd.h>#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <sys/un.h>#include <stddef.h>#include <time.h>#define DST_ADDR "/var/run/uds_test.socket"int main (int argc, char **argv){ int sockfd; struct sockaddr_un dst; int ret; sockfd = socket (AF_UNIX, SOCK_DGRAM, 0); if (sockfd < 0) { perror ("create socket failed"); exit (EXIT_FAILURE); } memset (&dst, 0, sizeof (dst)); dst.sun_family = AF_UNIX; strcpy (dst.sun_path, DST_ADDR); int len; len = offsetof (struct sockaddr_un, sun_path) + sizeof (DST_ADDR); time_t t; char *str; for (;;) { t = time (NULL); str = ctime (&t); if (str == NULL) break; sendto (sockfd, str, strlen (str),0, (struct sockaddr *)&dst,len); sleep (1); } return 0; }

这个demo实现client端读取当前的时间，然后通过UDS发送给服务器端，结果如图所示：

一个简单的示例，希望能给你提供些思路