* Copyright 2010, Axel Dörfler, axeld@pinc-software.de.
* This file may be used under the terms of the MIT License.
*/
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static bool sReceiveMode = false;
int
main(int argc, char** argv)
{
const char* peerAddress = "192.168.0.1";
if (argc > 1)
peerAddress = argv[1];
if (argc > 2 && !strcmp(argv[2], "recv"))
sReceiveMode = true;
int fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
return 1;
#if 1
sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons(sReceiveMode ? 8888 : 0);
if (bind(fd, (sockaddr*)&addr, sizeof(addr)) != 0)
perror("bind");
sockaddr ours;
socklen_t ourLength = sizeof(sockaddr);
if (getsockname(fd, &ours, &ourLength) != 0)
perror("getsockname");
else {
printf("After bind: local address %s (%u)\n",
inet_ntoa(((sockaddr_in&)ours).sin_addr),
ntohs(((sockaddr_in&)ours).sin_port));
}
#endif
if (!sReceiveMode) {
sockaddr_in peer;
peer.sin_family = AF_INET;
peer.sin_addr.s_addr = inet_addr(peerAddress);
peer.sin_port = htons(sReceiveMode ? 0 : 8888);
if (connect(fd, (sockaddr*)&peer, sizeof(peer)) != 0)
perror("connect");
ourLength = sizeof(sockaddr);
if (getsockname(fd, &ours, &ourLength) != 0)
perror("getsockname");
else {
printf("After connect: local address %s (%u)\n",
inet_ntoa(((sockaddr_in&)ours).sin_addr),
ntohs(((sockaddr_in&)ours).sin_port));
}
}
char buffer[256];
if (sReceiveMode) {
ssize_t bytesReceived = recv(fd, buffer, sizeof(buffer), 0);
if (bytesReceived > 0) {
buffer[bytesReceived] = 0;
printf("received: %s\n", buffer);
} else
perror("recv");
} else {
if (argc > 2)
send(fd, argv[2], strlen(argv[2]), 0);
else {
fgets(buffer, sizeof(buffer), stdin);
send(fd, buffer, strlen(buffer), 0);
}
}
close(fd);
return 0;
}
