SOCKET os_socket_tcp_connect(CHAR *host, USHORT port, BOOL nonblocking)
{
SOCKADDR_IN target;
SOCKET s;
HOSTENT *hostinfo;
CHAR *ip;
s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(inet_addr(host) == INADDR_NONE)
{
hostinfo = gethostbyname(host);
if(hostinfo)
{
ip = inet_ntoa (*(struct in_addr *)*hostinfo->h_addr_list);
}
else
{
ip = "0.0.0.0";
}
}
else
{
ip = host;
}
target.sin_family = AF_INET;
target.sin_addr.s_addr = inet_addr(ip);
target.sin_port = htons(port);
os_socket_set_nonblocking(s, nonblocking);
if(connect(s,(struct sockaddr *)&target,sizeof(target)) != 0 && !nonblocking)
{
//Has Error!
dprintf("[os_socket_tcp_connect] FAIL to connect %s:%d\r\n", ip, port);
closesocket(s);
return 0;
}
else
{
//dprintf("[os_socket_tcp_connect] succeed to connect %s:%d\r\n", ip, port);
return s;
}
}
/**
*Creates a nonblocking IPv6 socket
*@param sin sockaddr_in6 struct. Used for bind(2).
*@return the FD of the socket or -1 on error.
*/
int
os_getsocket6(const char *if_name, uint16_t port, int bufspace, union olsr_sockaddr *bindto)
{
struct sockaddr_in6 sin6;
int on;
int sock = socket(AF_INET6, SOCK_DGRAM, 0);
if (sock < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot open socket for OLSR PDUs (%s)\n", strerror(errno));
olsr_exit(EXIT_FAILURE);
}
#ifdef IPV6_V6ONLY
on = 1;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) < 0) {
OLSR_WARN(LOG_NETWORKING, "Cannot set socket for OLSR PDUs to ipv6 only (%s)\n", strerror(errno));
}
#endif
//#ifdef SO_BROADCAST
/*
if (setsockopt(sock, SOL_SOCKET, SO_MULTICAST, &on, sizeof(on)) < 0)
{
perror("setsockopt");
syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m");
close(sock);
return (-1);
}
*/
//#endif
#ifdef SO_RCVBUF
if(bufspace > 0) {
for (on = bufspace;; on -= 1024) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &on, sizeof(on)) == 0) {
OLSR_DEBUG(LOG_NETWORKING, "Set socket buffer space to %d\n", on);
break;
}
if (on <= 8 * 1024) {
OLSR_WARN(LOG_NETWORKING, "Could not set a socket buffer space for OLSR PDUs (%s)\n", strerror(errno));
break;
}
}
}
#endif
on = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot reuse address for socket for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
/*
* we are abusing "on" here. The value is 1 which is our intended
* hop limit value.
*/
if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot set multicast hops to 1 for socket for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
/*
* WHEN USING KERNEL 2.6 THIS MUST HAPPEN PRIOR TO THE PORT BINDING!!!!
*/
/* Bind to device */
if (bind_socket_to_device(sock, if_name) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot bind socket for OLSR PDUs to interface %s: %s (%d)\n", if_name, strerror(errno), errno);
close(sock);
olsr_exit(EXIT_FAILURE);
}
if (bindto == NULL) {
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_port = htons(port);
bindto = (union olsr_sockaddr *)&sin6;
}
if (bind(sock, &bindto->std, sizeof(*bindto)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot bind socket for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
os_socket_set_nonblocking(sock);
return sock;
}
/**
*Creates a nonblocking broadcast socket.
*@param sa sockaddr struct. Used for bind(2).
*@return the FD of the socket or -1 on error.
*/
int
os_getsocket4(const char *if_name, uint16_t port, int bufspace, union olsr_sockaddr *bindto)
{
struct sockaddr_in sin4;
int on;
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot open socket for OLSR PDUs (%s)\n", strerror(errno));
olsr_exit(EXIT_FAILURE);
}
on = 1;
#ifdef SO_BROADCAST
if (bindto) {
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot set socket for OLSR PDUs to broadcast mode (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
}
#endif
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot reuse address for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
#ifdef SO_RCVBUF
if(bufspace > 0) {
for (on = bufspace;; on -= 1024) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &on, sizeof(on)) == 0) {
OLSR_DEBUG(LOG_NETWORKING, "Set socket buffer space to %d\n", on);
break;
}
if (on <= 8 * 1024) {
OLSR_WARN(LOG_NETWORKING, "Could not set a socket buffer space for OLSR PDUs (%s)\n", strerror(errno));
break;
}
}
}
#endif
/*
* WHEN USING KERNEL 2.6 THIS MUST HAPPEN PRIOR TO THE PORT BINDING!!!!
*/
/* Bind to device */
if (bind_socket_to_device(sock, if_name) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot bind socket for OLSR PDUs to interface %s: %s (%d)\n", if_name, strerror(errno), errno);
close(sock);
olsr_exit(EXIT_FAILURE);
}
if (bindto == NULL) {
memset(&sin4, 0, sizeof(sin4));
sin4.sin_family = AF_INET;
sin4.sin_port = htons(port);
sin4.sin_addr.s_addr = 0;
bindto = (union olsr_sockaddr *)&sin4;
}
if (bind(sock, &bindto->std, sizeof(*bindto)) < 0) {
#if !defined(REMOVE_LOG_ERROR)
struct ipaddr_str buf;
#endif
OLSR_ERROR(LOG_NETWORKING, "Could not bind socket for OLSR PDUs to %s/%d: %s (%d)\n",
inet_ntop(AF_INET, &sin4.sin_addr, buf.buf, sizeof(buf)), port, strerror(errno), errno);
close(sock);
olsr_exit(EXIT_FAILURE);
}
os_socket_set_nonblocking(sock);
return sock;
}
