From 0d6ff71ae3c7ac3a446d295ef71884a05093b37c Mon Sep 17 00:00:00 2001 From: Guillaume Subiron Date: Tue, 15 Mar 2016 10:31:19 +0100 Subject: slirp: Adding IPv6, ICMPv6 Echo and NDP autoconfiguration This patch adds the functions needed to handle IPv6 packets. ICMPv6 and NDP headers are implemented. Slirp is now able to send NDP Router or Neighbor Advertisement when it receives Router or Neighbor Solicitation. Using a 64bit-sized IPv6 prefix, the guest is now able to perform stateless autoconfiguration (SLAAC) and to compute its IPv6 address. This patch adds an ndp_table, mainly inspired by arp_table, to keep an NDP cache and manage network address resolution. Slirp regularly sends NDP Neighbor Advertisement, as recommended by the RFC, to make the guest refresh its route. This also adds ip6_cksum() to compute ICMPv6 checksums using IPv6 pseudo-header. Some #define ETH_* are moved upper in slirp.h to make them accessible to other slirp/*.h Signed-off-by: Guillaume Subiron Signed-off-by: Samuel Thibault Reviewed-by: Thomas Huth --- slirp/ip6_input.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 slirp/ip6_input.c (limited to 'slirp/ip6_input.c') diff --git a/slirp/ip6_input.c b/slirp/ip6_input.c new file mode 100644 index 0000000000..add9e6a73a --- /dev/null +++ b/slirp/ip6_input.c @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#include "qemu/osdep.h" +#include "slirp.h" +#include "ip6_icmp.h" + +/* + * IP initialization: fill in IP protocol switch table. + * All protocols not implemented in kernel go to raw IP protocol handler. + */ +void ip6_init(Slirp *slirp) +{ + icmp6_init(slirp); +} + +void ip6_cleanup(Slirp *slirp) +{ + icmp6_cleanup(slirp); +} + +void ip6_input(struct mbuf *m) +{ + struct ip6 *ip6; + + DEBUG_CALL("ip6_input"); + DEBUG_ARG("m = %lx", (long)m); + DEBUG_ARG("m_len = %d", m->m_len); + + if (m->m_len < sizeof(struct ip6)) { + goto bad; + } + + ip6 = mtod(m, struct ip6 *); + + if (ip6->ip_v != IP6VERSION) { + goto bad; + } + + /* check ip_ttl for a correct ICMP reply */ + if (ip6->ip_hl == 0) { + /*icmp_error(m, ICMP_TIMXCEED,ICMP_TIMXCEED_INTRANS, 0,"ttl");*/ + goto bad; + } + + /* + * Switch out to protocol's input routine. + */ + switch (ip6->ip_nh) { + case IPPROTO_TCP: + /*tcp_input(m, hlen, (struct socket *)NULL);*/ + break; + case IPPROTO_UDP: + /*udp_input(m, hlen);*/ + break; + case IPPROTO_ICMPV6: + icmp6_input(m); + break; + default: + m_free(m); + } + return; +bad: + m_free(m); +} -- cgit v1.2.1