/**
* New proxied UDP conversation created.
* Global callback for udp_proxy_accept().
*/
static void
pxudp_pcb_accept(void *arg, struct udp_pcb *newpcb, struct pbuf *p,
ip_addr_t *addr, u16_t port)
{
struct pxudp *pxudp;
ipX_addr_t dst_addr;
int mapping;
int sdom;
SOCKET sock;
LWIP_ASSERT1(newpcb != NULL);
LWIP_ASSERT1(p != NULL);
LWIP_UNUSED_ARG(arg);
pxudp = pxudp_allocate();
if (pxudp == NULL) {
DPRINTF(("pxudp_allocate: failed\n"));
udp_remove(newpcb);
pbuf_free(p);
return;
}
sdom = PCB_ISIPV6(newpcb) ? PF_INET6 : PF_INET;
mapping = pxremap_outbound_ipX(PCB_ISIPV6(newpcb), &dst_addr, &newpcb->local_ip);
#if 0 /* XXX: DNS IPv6->IPv4 remapping hack */
if (mapping == PXREMAP_MAPPED
&& newpcb->local_port == 53
&& PCB_ISIPV6(newpcb))
{
/*
* "Remap" DNS over IPv6 to IPv4 since Ubuntu dnsmasq does not
* listen on IPv6.
*/
sdom = PF_INET;
ipX_addr_set_loopback(0, &dst_addr);
}
#endif /* DNS IPv6->IPv4 remapping hack */
sock = proxy_connected_socket(sdom, SOCK_DGRAM,
&dst_addr, newpcb->local_port);
if (sock == INVALID_SOCKET) {
udp_remove(newpcb);
pbuf_free(p);
return;
}
pxudp->sock = sock;
pxudp->pcb = newpcb;
udp_recv(newpcb, pxudp_pcb_recv, pxudp);
pxudp->pmhdl.callback = pxudp_pmgr_pump;
pxudp_chan_send(POLLMGR_CHAN_PXUDP_ADD, pxudp);
/* dispatch directly instead of calling pxudp_pcb_recv() */
pxudp_pcb_forward_outbound(pxudp, p, addr, port);
}
/**
* udp_recv() callback.
*/
static void
pxudp_pcb_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p,
ip_addr_t *addr, u16_t port)
{
struct pxudp *pxudp = (struct pxudp *)arg;
LWIP_ASSERT1(pxudp != NULL);
LWIP_ASSERT1(pcb == pxudp->pcb);
LWIP_UNUSED_ARG(pcb);
if (p != NULL) {
pxudp_pcb_forward_outbound(pxudp, p, addr, port);
}
else {
pxudp_pcb_expired(pxudp);
}
}
