/* Connect to socket with ip address */
GIOChannel *net_connect_ip(IPADDR *ip, int port, IPADDR *my_ip)
{
union sockaddr_union so;
int handle, ret, opt = 1;
if (my_ip != NULL && ip->family != my_ip->family) {
g_warning("net_connect_ip(): ip->family != my_ip->family");
my_ip = NULL;
}
/* create the socket */
memset(&so, 0, sizeof(so));
so.sin.sin_family = ip->family;
handle = socket(ip->family, SOCK_STREAM, 0);
if (handle == -1)
return NULL;
/* set socket options */
#ifndef WIN32
fcntl(handle, F_SETFL, O_NONBLOCK);
#endif
setsockopt(handle, SOL_SOCKET, SO_REUSEADDR,
(char *) &opt, sizeof(opt));
setsockopt(handle, SOL_SOCKET, SO_KEEPALIVE,
(char *) &opt, sizeof(opt));
/* set our own address */
if (my_ip != NULL) {
sin_set_ip(&so, my_ip);
if (bind(handle, &so.sa, SIZEOF_SOCKADDR(so)) == -1) {
/* failed, set it back to INADDR_ANY */
sin_set_ip(&so, NULL);
bind(handle, &so.sa, SIZEOF_SOCKADDR(so));
}
}
/* connect */
sin_set_ip(&so, ip);
sin_set_port(&so, port);
ret = connect(handle, &so.sa, SIZEOF_SOCKADDR(so));
#ifndef WIN32
if (ret < 0 && errno != EINPROGRESS)
#else
if (ret < 0 && WSAGetLastError() != WSAEWOULDBLOCK)
#endif
{
int old_errno = errno;
close(handle);
errno = old_errno;
return NULL;
}
return g_io_channel_new(handle);
}
/* Get name for host, *name should be g_free()'d unless it's NULL.
Return values are the same as with net_gethostbyname() */
int net_gethostbyaddr(IPADDR *ip, char **name)
{
#ifdef HAVE_IPV6
union sockaddr_union so;
int host_error;
char hostname[NI_MAXHOST];
#else
struct hostent *hp;
#endif
g_return_val_if_fail(ip != NULL, -1);
g_return_val_if_fail(name != NULL, -1);
*name = NULL;
#ifdef HAVE_IPV6
memset(&so, 0, sizeof(so));
sin_set_ip(&so, ip);
/* save error to host_error for later use */
host_error = getnameinfo((struct sockaddr *) &so, sizeof(so),
hostname, sizeof(hostname), NULL, 0, 0);
if (host_error != 0)
return host_error;
*name = g_strdup(hostname);
#else
if (ip->family != AF_INET) return -1;
hp = gethostbyaddr((const char *) &ip->ip, 4, AF_INET);
if (hp == NULL) return -1;
*name = g_strdup(hp->h_name);
#endif
return 0;
}
/* Listen for connections on a socket. if `my_ip' is NULL, listen in any
address. */
GIOChannel *net_listen(IPADDR *my_ip, int *port)
{
union sockaddr_union so;
int ret, handle, opt = 1;
socklen_t len;
g_return_val_if_fail(port != NULL, NULL);
memset(&so, 0, sizeof(so));
sin_set_port(&so, *port);
sin_set_ip(&so, my_ip);
/* create the socket */
handle = socket(so.sin.sin_family, SOCK_STREAM, 0);
#ifdef HAVE_IPV6
if (handle == -1 && (errno == EINVAL || errno == EAFNOSUPPORT)) {
/* IPv6 is not supported by OS */
so.sin.sin_family = AF_INET;
so.sin.sin_addr.s_addr = INADDR_ANY;
handle = socket(AF_INET, SOCK_STREAM, 0);
}
#endif
if (handle == -1)
return NULL;
/* set socket options */
#ifndef WIN32
fcntl(handle, F_SETFL, O_NONBLOCK);
#endif
setsockopt(handle, SOL_SOCKET, SO_REUSEADDR,
(char *) &opt, sizeof(opt));
setsockopt(handle, SOL_SOCKET, SO_KEEPALIVE,
(char *) &opt, sizeof(opt));
/* specify the address/port we want to listen in */
ret = bind(handle, &so.sa, SIZEOF_SOCKADDR(so));
if (ret >= 0) {
/* get the actual port we started listen */
len = SIZEOF_SOCKADDR(so);
ret = getsockname(handle, &so.sa, &len);
if (ret >= 0) {
*port = sin_get_port(&so);
/* start listening */
if (listen(handle, 1) >= 0)
return g_io_channel_new(handle);
}
}
/* error */
close(handle);
return NULL;
}
/* Connect to socket with ip address */
int net_connect_ip(IPADDR *ip, int port, IPADDR *my_ip)
{
union sockaddr_union so;
int handle, ret, opt = 1;
/* create the socket */
memset(&so, 0, sizeof(so));
so.sin.sin_family = ip->family;
handle = socket(ip->family, SOCK_STREAM, 0);
if (handle == -1)
return -1;
/* set socket options */
fcntl(handle, F_SETFL, O_NONBLOCK);
setsockopt(handle, SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof(opt));
setsockopt(handle, SOL_SOCKET, SO_KEEPALIVE, (char *) &opt, sizeof(opt));
/* set our own address, ignore if bind() fails */
if (my_ip != NULL) {
sin_set_ip(&so, my_ip);
bind(handle, &so.sa, sizeof(so));
}
/* connect */
sin_set_ip(&so, ip);
sin_set_port(&so, port);
ret = connect(handle, &so.sa, sizeof(so));
if (ret < 0 && errno != EINPROGRESS) {
close(handle);
return -1;
}
return handle;
}
/* Listen for connections on a socket. if `my_ip' is NULL, listen in any
address. */
int net_listen(IPADDR *my_ip, int *port)
{
union sockaddr_union so;
int ret, handle, opt = 1;
socklen_t len = sizeof(so);
g_return_val_if_fail(port != NULL, -1);
memset(&so, 0, sizeof(so));
sin_set_port(&so, *port);
sin_set_ip(&so, my_ip);
/* create the socket */
handle = socket(so.sin.sin_family, SOCK_STREAM, 0);
if (handle == -1)
return -1;
/* set socket options */
fcntl(handle, F_SETFL, O_NONBLOCK);
setsockopt(handle, SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof(opt));
setsockopt(handle, SOL_SOCKET, SO_KEEPALIVE, (char *) &opt, sizeof(opt));
/* specify the address/port we want to listen in */
ret = bind(handle, &so.sa, sizeof(so));
if (ret < 0) {
close(handle);
return -1;
}
/* get the actual port we started listen */
ret = getsockname(handle, &so.sa, &len);
if (ret < 0) {
close(handle);
return -1;
}
*port = sin_get_port(&so);
/* start listening */
if (listen(handle, 1) < 0) {
close(handle);
return -1;
}
return handle;
}
