LXR qemu/slirp/ip6

   1/*
   2 * Copyright (c) 2013
   3 * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
   4 */
   5
   6#include "qemu/osdep.h"
   7#include "slirp.h"
   8#include "ip6_icmp.h"
   9
  10/*
  11 * IP initialization: fill in IP protocol switch table.
  12 * All protocols not implemented in kernel go to raw IP protocol handler.
  13 */
  14void ip6_init(Slirp *slirp)
  15{
  16    icmp6_init(slirp);
  17}
  18
  19void ip6_cleanup(Slirp *slirp)
  20{
  21    icmp6_cleanup(slirp);
  22}
  23
  24void ip6_input(struct mbuf *m)
  25{
  26    struct ip6 *ip6;
  27    Slirp *slirp = m->slirp;
  28
  29    if (!slirp->in6_enabled) {
  30        goto bad;
  31    }
  32
  33    DEBUG_CALL("ip6_input");
  34    DEBUG_ARG("m = %lx", (long)m);
  35    DEBUG_ARG("m_len = %d", m->m_len);
  36
  37    if (m->m_len < sizeof(struct ip6)) {
  38        goto bad;
  39    }
  40
  41    ip6 = mtod(m, struct ip6 *);
  42
  43    if (ip6->ip_v != IP6VERSION) {
  44        goto bad;
  45    }
  46
  47    if (ntohs(ip6->ip_pl) > IF_MTU) {
  48        icmp6_send_error(m, ICMP6_TOOBIG, 0);
  49        goto bad;
  50    }
  51
  52    /* check ip_ttl for a correct ICMP reply */
  53    if (ip6->ip_hl == 0) {
  54        icmp6_send_error(m, ICMP6_TIMXCEED, ICMP6_TIMXCEED_INTRANS);
  55        goto bad;
  56    }
  57
  58    /*
  59     * Switch out to protocol's input routine.
  60     */
  61    switch (ip6->ip_nh) {
  62    case IPPROTO_TCP:
  63        NTOHS(ip6->ip_pl);
  64        tcp_input(m, sizeof(struct ip6), (struct socket *)NULL, AF_INET6);
  65        break;
  66    case IPPROTO_UDP:
  67        udp6_input(m);
  68        break;
  69    case IPPROTO_ICMPV6:
  70        icmp6_input(m);
  71        break;
  72    default:
  73        m_free(m);
  74    }
  75    return;
  76bad:
  77    m_free(m);
  78}
  79