소켓 통신중 문제가 발생하였는데 원인을 짐작할 수가 없습니다.

void Snd_SMS(int argc, char *argv)
{
	struct hostent *hp;
	int t,n,sock, clnt_len, serv_len,msglen,sendmsglen;
	struct sockaddr_in serv_addr, clnt_addr;
	server_name = "sms.gabia.com";
 
	clientmsg = get_packet_info(argv);
	if((hp=gethostbyname(server_name)) == NULL) 
	{
		fprintf(stderr, "gethostbyname failed\n");
		//exit(2);
	}
	else
	{
		printf("gethostbyname is success!\n");	
	}
	serv_len=sizeof(serv_addr);
	memset((char *)&serv_addr, '\0',serv_len);
	serv_addr.sin_family=AF_INET;
	serv_addr.sin_port=htons(PORTNUM);
	memcpy((char *)&serv_addr.sin_addr, hp->h_addr, hp->h_length);
	printf("%d\n",hp->h_addr);
 
	if((sock=socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		printf("socket error");
		//exit(3);
	}
        else{
               pritnf("socket bind success!\n");
        }
	if(connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) <0) {
		perror("connect error: \n");
		//exit(4);
	}
	if( sendto(sock, clientmsg, strlen(clientmsg), 0,(struct sockaddr *)&serv_addr, sizeof(struct sockaddr_in)) == -1 )
		 perror("send error\n");
 
	if((n=recv(sock, reply, MAXMSG, 0) < 0)) {
		//printf("n=%d\n",n);
		printf("recv error\n");
		//exit(6);
	}else {
		printf("send to server : %s\n",clientmsg);
		printf("%s\n",reply);
		//exit(0);
		close(sock);
	}
}