int initnatpmp(natpmp_t * p)
{
int flags;
struct sockaddr_in addr;
if(!p)
return NATPMP_ERR_INVALIDARGS;
memset(p, 0, sizeof(natpmp_t));
p->s = socket(PF_INET, SOCK_DGRAM, 0);
if(p->s < 0)
return NATPMP_ERR_SOCKETERROR;
if((flags = fcntl(p->s, F_GETFL, 0)) < 0)
return NATPMP_ERR_FCNTLERROR;
if(fcntl(p->s, F_SETFL, flags | O_NONBLOCK) < 0)
return NATPMP_ERR_FCNTLERROR;
if(getdefaultgateway(&(p->gateway)) < 0)
return NATPMP_ERR_CANNOTGETGATEWAY;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(NATPMP_PORT);
addr.sin_addr.s_addr = p->gateway;
if(connect(p->s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
return NATPMP_ERR_CONNECTERR;
return 0;
}
LIBSPEC int initnatpmp(natpmp_t * p, int forcegw, in_addr_t forcedgw)
{
#ifdef WIN32
u_long ioctlArg = 1;
#else
int flags;
#endif
struct sockaddr_in addr;
if(!p)
return NATPMP_ERR_INVALIDARGS;
memset(p, 0, sizeof(natpmp_t));
p->s = socket(PF_INET, SOCK_DGRAM, 0);
if(p->s < 0)
return NATPMP_ERR_SOCKETERROR;
#ifdef WIN32
if(ioctlsocket(p->s, FIONBIO, &ioctlArg) == SOCKET_ERROR)
return NATPMP_ERR_FCNTLERROR;
#else
if((flags = fcntl(p->s, F_GETFL, 0)) < 0)
return NATPMP_ERR_FCNTLERROR;
if(fcntl(p->s, F_SETFL, flags | O_NONBLOCK) < 0)
return NATPMP_ERR_FCNTLERROR;
#endif
if(forcegw) {
p->gateway = forcedgw;
} else {
if(getdefaultgateway(&(p->gateway)) < 0)
return NATPMP_ERR_CANNOTGETGATEWAY;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(NATPMP_PORT);
addr.sin_addr.s_addr = p->gateway;
if(connect(p->s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
return NATPMP_ERR_CONNECTERR;
return 0;
}
