수다닷컴

소스는 아래와 같은데
실행하면 세그멘테이션 오류가 나요..
제 코드는 제가 보니 도저히 어디가 틀렸는지 안보이네요..ㅡㅜㅜ
고수님들의 가르침 부탁드립니다.

#include stdio.h
#include sys/socket.h
#include arpa/inet.h
#include stdlib.h
#include string.h
#include unistd.h
#define MAXSOCK 10
void error(char* );
int
main(int argc, char* argv[]) {
int servsock,clntsock;
struct sockaddr_in echoservaddr, echoclntaddr;
unsigned int clntlen;
char echobuffer[32];
int recvmsg;
if(argc != 2) {
fprintf(stderr,Usage : %s port, argv[0]);
exit(1);
}
if((servsock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) 0)
error(socket() failed);
memset(&echoservaddr, 0, sizeof(echoservaddr));
echoservaddr.sin_family = AF_INET;
echoservaddr.sin_addr.s_addr = htonl(INADDR_ANY);
echoservaddr.sin_port = htons(atoi(argv[2]));
if(bind(servsock, (struct sockaddr*)&echoservaddr, sizeof(echoservaddr)) 0)
error(bind() failed);
if(listen(servsock,MAXSOCK) 0)
error(listen() failed);
clntlen = sizeof(echoclntaddr);
for( ; ;){
if(clntsock = accept(servsock, (struct sockaddr*)&echoclntaddr, &clntlen) 0)
error(accept() failed);
if((recvmsg = recv(clntsock, echobuffer, 32, 0) 0))
error(recv() failed);
while(recvmsg 0) {
if(send(clntsock, echobuffer, recvmsg, 0) != recvmsg)
error(send() failed);
if((recvmsg = recv(clntsock, echobuffer, 32, 0) 0))
error(recv() failed);
close(clntsock);
}
close(servsock);
return 0;
}
}
void error(char* message) {
fputs(message, stderr);
exit(1);
}

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