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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "tcp_echo.h"
int main(int argc, char **argv)
{
struct sockaddr_in si_server;
int port, s, i, slen = sizeof(si_server);
char buf[BUFLEN];
char srv_addr[16];
fd_set readfds;
struct timeval tv;
int ret;
/* TCP socket creation */
if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
perror("socket");
exit(EXIT_FAILURE);
}
/* Server sockaddr structure */
memset((char *) &si_server, 0, sizeof(si_server));
si_server.sin_family = AF_INET;
si_server.sin_port = htons(SPORT);
if (inet_aton(SADDR, &si_server.sin_addr) == 0) {
fprintf(stderr, "inet_aton() failed\n");
exit(EXIT_FAILURE);
}
/* Establish connection */
if (connect(s, (struct sockaddr *) &si_server, sizeof(si_server)) ==
-1) {
fprintf(stderr, "connect() failed\n");
exit(EXIT_FAILURE);
}
/* Send-Recv loop */
for (i = 0; i < NPACK; i++) {
sprintf(buf, "DATA PACKET # %d", i);
printf("Sending -- %s -- to %s:%d\n", buf,
inet_ntoa(si_server.sin_addr), ntohs(si_server.sin_port));
if (send(s, buf, BUFLEN, 0) == -1) {
perror("send()");
exit(EXIT_FAILURE);
}
ret = recv(s, buf, BUFLEN, 0);
if (ret > 0) {
printf("Received -- %s -- from %s:%d\n", buf,
inet_ntoa(si_server.sin_addr),
ntohs(si_server.sin_port));
} else {
perror("recv()");
exit(EXIT_FAILURE);
}
sleep(2);
}
close(s);
return 0;
}
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