-int udp_output(struct socket *so, struct mbuf *m,
- struct sockaddr_in *addr)
-
-{
- Slirp *slirp = so->slirp;
- struct sockaddr_in saddr, daddr;
-
- saddr = *addr;
- if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) ==
- slirp->vnetwork_addr.s_addr) {
- uint32_t inv_mask = ~slirp->vnetwork_mask.s_addr;
-
- if ((so->so_faddr.s_addr & inv_mask) == inv_mask) {
- saddr.sin_addr = slirp->vhost_addr;
- } else if (addr->sin_addr.s_addr == loopback_addr.s_addr ||
- so->so_faddr.s_addr != slirp->vhost_addr.s_addr) {
- saddr.sin_addr = so->so_faddr;
- }
- }
- daddr.sin_addr = so->so_laddr;
- daddr.sin_port = so->so_lport;
-
- return udp_output2(so, m, &saddr, &daddr, so->so_iptos);
-}
-