slirp/src/ip6_output.c

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2 /*
   3  * Copyright (c) 2013
   4  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
   5  */
   6
   7 #include "slirp.h"
   8
   9 /* Number of packets queued before we start sending
  10  * (to prevent allocing too many mbufs) */
  11 #define IF6_THRESH 10
  12
  13 /*
  14  * IPv6 output. The packet in mbuf chain m contains a IP header
  15  */
  16 int ip6_output(struct socket *so, struct mbuf *m, int fast)
  17 {
  18     struct ip6 *ip = mtod(m, struct ip6 *);
  19
  20     DEBUG_CALL("ip6_output");
  21     DEBUG_ARG("so = %p", so);
  22     DEBUG_ARG("m = %p", m);
  23
  24     /* Fill IPv6 header */
  25     ip->ip_v = IP6VERSION;
  26     ip->ip_hl = IP6_HOP_LIMIT;
  27     ip->ip_tc_hi = 0;
  28     ip->ip_tc_lo = 0;
  29     ip->ip_fl_hi = 0;
  30     ip->ip_fl_lo = 0;
  31
  32     if (fast) {
  33         if_encap(m->slirp, m);
  34     } else {
  35         if_output(so, m);
  36     }
  37
  38     return 0;
  39 }