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#include <sys/socket.h>
#include <netinet/in.h>
#include <stdint.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include "network.h"
int
net_listen4(uint32_t ip, uint16_t port, int backlog)
{
struct sockaddr_in addr_in = { 0 };
int sock = 0;
int temp = 1;
if (ip != 0) {
return -ENOSYS;
}
if (port == 0) {
return -EINVAL;
}
addr_in.sin_port = htons(port);
sock = socket(AF_INET, SOCK_STREAM, 0);
if (errno != 0) {
perror("socket(3)");
return -errno;
}
temp = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &temp, sizeof(temp));
if (errno != 0) {
perror("setsockopt(3)");
close(sock);
return -errno;
}
bind(sock, (struct sockaddr *)&addr_in, sizeof(addr_in));
if (errno != 0) {
perror("bind(3)");
close(sock);
return -errno;
}
listen(sock, backlog);
if (errno != 0) {
perror("listen(3)");
close(sock);
return -errno;
}
return sock;
}
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