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<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center"> ● UNIX网络编程 (BM: clown) </font></big></big></td></tr>
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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="10.htm">上一层</a>][<a href="182.htm">下一篇</a>]
<hr><p align="left"><small>发信人: clown (梧桐叶), 信区: UNP <br>
标 题: unix域协议客户，服务器回射程序 <br>
发信站: UNIX编程 (2001年09月24日21:01:01 星期一), 站内信件 <br>
<br>
//server <br>
#include <sys/un.h> <br>
#include <netinet/in.h> <br>
#include <sys/types.h> <br>
#include <sys/socket.h> <br>
#include <string.h> <br>
#include <signal.h> <br>
#include <sys/wait.h> <br>
<br>
#define PATH "/tmp/tcpdomain" <br>
<br>
void sig_chld(int signo); <br>
void str_echo(int sockfd); <br>
int main() <br>
{ <br>
int listenfd, connfd; <br>
pid_t childpid; <br>
socklen_t clilen; <br>
struct sockaddr_un cliaddr, servaddr; <br>
int optval, optlen; <br>
if((listenfd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0) { <br>
printf("create socket error\n"); <br>
exit(1); <br>
} <br>
memset(&servaddr, 0, sizeof(servaddr)); <br>
servaddr.sun_family = AF_LOCAL; <br>
strncpy(servaddr.sun_path, PATH, sizeof(servaddr.sun_path)-1); <br>
<br>
optval = 1; <br>
optlen = sizeof(int); <br>
if(setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (const void *)&optval, o <br>
ptlen) == -1) { <br>
printf("setsockopt error\n"); <br>
exit(1); <br>
} <br>
<br>
unlink(PATH); <br>
if(bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) { <br>
printf("bind error\n"); <br>
exit(1); <br>
} <br>
} <br>
if(listen(listenfd, 5) < 0) { <br>
printf("listen error\n"); <br>
exit(1); <br>
} <br>
signal(SIGCHLD, sig_chld); <br>
for( ; ; ) { <br>
clilen = sizeof(cliaddr); <br>
memset(&cliaddr, 0, clilen); <br>
if((connfd = accept(listenfd, (struct sockaddr *)&cliaddr, &clilen)) < 0 <br>
) <br>
{ <br>
printf("accept error\n"); <br>
exit(1); <br>
} <br>
printf("client: %s, len: %d\n", cliaddr.sun_path, clilen); <br>
//结果cliaddr.sun_path为空。 <br>
if((childpid = fork()) == 0) { //child process <br>
close(listenfd); <br>
str_echo(connfd); <br>
exit(0); <br>
} <br>
close(connfd); //parent process <br>
} <br>
close(listenfd); <br>
return 0; <br>
} <br>
<br>
void str_echo(int sockfd) <br>
{ <br>
ssize_t n; <br>
char line[32]; <br>
for( ; ; ) { <br>
if((n = recv(sockfd, line, 31, 0)) == 0) <br>
return; //connection closed <br>
else if( n < 0) { <br>
printf("receive error\n"); <br>
return; <br>
} <br>
line[n] = '\0'; <br>
printf("%s", line); <br>
if(send(sockfd, line, strlen(line), 0) < 0) { <br>
printf("send error\n"); <br>
return; <br>
} <br>
} <br>
} <br>
} <br>
<br>
void sig_chld(int signo) <br>
{ <br>
pid_t pid; <br>
int stat; <br>
while((pid = waitpid(-1, &stat, WNOHANG)) > 0) <br>
printf("child %d terminated\n", pid); <br>
return; <br>
} <br>
<br>
//*************************************************/ <br>
//client <br>
#include <stdio.h> <br>
#include <netinet/in.h> <br>
#include <arpa/inet.h> <br>
#include <sys/un.h> <br>
#include <sys/types.h> <br>
#include <sys/socket.h> <br>
#include <string.h> <br>
#include <sys/select.h> <br>
#include <sys/time.h> <br>
#include <signal.h> <br>
<br>
#define PATH "/tmp/tcpdomain" <br>
<br>
void str_cli(FILE *fp, int sockfd); <br>
void sig(int signo); <br>
int main() <br>
{ <br>
int i, sockfd; <br>
struct sockaddr_un servaddr; <br>
<br>
signal(SIGINT, sig); <br>
if((sockfd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0) { <br>
printf("create socket error\n"); <br>
exit(1); <br>
} <br>
memset(&servaddr, 0, sizeof(servaddr)); <br>
servaddr.sun_family = AF_LOCAL; <br>
strncpy(servaddr.sun_path, PATH, sizeof(servaddr.sun_path)-1); <br>
if(connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) { <br>
printf("connect error\n"); <br>
exit(1); <br>
} <br>
str_cli(stdin, sockfd); <br>
//close(sockfd); <br>
return 0; <br>
} <br>
<br>
void str_cli(FILE *fp, int sockfd) <br>
{ <br>
int maxfd1; <br>
fd_set rset; <br>
char sendline[32], recvline[32]; <br>
int n; <br>
FD_ZERO(&rset); <br>
for( ; ;) { <br>
FD_SET(fileno(fp), &rset); <br>
FD_SET(sockfd, &rset); <br>
maxfd1 = fileno(fp) > sockfd ? fileno(fp)+1 : sockfd+1; <br>
if(select(maxfd1, &rset, NULL, NULL, NULL) > 0) { <br>
if(FD_ISSET(sockfd, &rset)) { //socket is readable <br>
if((n = recv(sockfd, recvline, 31, 0)) == 0) { <br>
printf("socket closed\n"); <br>
return; <br>
} else if( n < 0) { <br>
printf("recv error\n"); <br>
return; <br>
} <br>
recvline[n] = '\0'; <br>
fputs(recvline, stdout); <br>
} <br>
if(FD_ISSET(fileno(fp), &rset)) { //input is readable <br>
if(fgets(sendline, 32, fp) != NULL) { <br>
if(send(sockfd, sendline, strlen(sendline), 0) < 0) { <br>
printf("send error\n"); <br>
return; <br>
} <br>
} else { <br>
printf("send end, return.\n"); <br>
return; <br>
} <br>
} <br>
} //end of select <br>
} //end of for <br>
} <br>
<br>
void sig(int signo) <br>
{ <br>
printf("SIGINT captured\n"); <br>
return; <br>
} <br>
<br>
-- <br>
易朽的是生命，似那转瞬即谢的花朵；然而永存的，是对未来的渴望， <br>
是那生生世世传递下来的，不朽的，生的激情。每一朵勇敢开放的花， <br>
都是一个死亡唇边的微笑。 <br>
※ 来源:·UNIX编程 www.tiaozhan.com/unixbbs/·[FROM: 202.114.1.61] <br>
</small><hr>
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