unix - How do I communicate between a server and a client using sockets? [C] -


i doing unix, c assignment. creating server , client interact each other. pretty sure have set basic framework when try send/receive messages, doesn't work.

here while loop code server, tried show relevant code:

while(1) {             clntadrlen = sizeof(clntaddr);             clntfd = accept(srvrfd, (struct sockaddr*)&clntaddr, null);             if (fork() == 0) {                      send(clntfd, "yourmessage", 12, null);                     close(clntfd);                     exit(0);             } else {                     close(clntfd);             } }

and here code client:

do {             result = connect(srvrfd, (struct sockaddr*)&srvraddr, srvrlen);             if(result==-1) {                     sleep(1);             }             recv(srvrfd, buf, sizeof(buf), null);             printf("%s", buf); //here try print message sent server     } while (result==1);

when run both server , client, should print "yourmessage". instead prints:

n0�,

am doing wrong? thanks

i guess problem in accept function.

as said in linux programmer's manual:

int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen);

the addrlen argument value-result argument: caller must initialize contain size (in bytes) of structure pointed addr; on return contain actual size of peer address.


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