diff options
Diffstat (limited to 'sys/net/if_gif.c')
| -rw-r--r-- | sys/net/if_gif.c | 192 |
1 files changed, 128 insertions, 64 deletions
diff --git a/sys/net/if_gif.c b/sys/net/if_gif.c index aba00a8e73a..36512c6b400 100644 --- a/sys/net/if_gif.c +++ b/sys/net/if_gif.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_gif.c,v 1.40 2007/02/10 15:34:22 claudio Exp $ */ +/* $OpenBSD: if_gif.c,v 1.41 2007/02/22 15:31:44 claudio Exp $ */ /* $KAME: if_gif.c,v 1.43 2001/02/20 08:51:07 itojun Exp $ */ /* @@ -45,14 +45,17 @@ #ifdef INET #include <netinet/in.h> +#include <netinet/in_systm.h> #include <netinet/in_var.h> #include <netinet/in_gif.h> +#include <netinet/ip.h> #endif /* INET */ #ifdef INET6 #ifndef INET #include <netinet/in.h> #endif +#include <netinet/ip6.h> #include <netinet6/in6_gif.h> #endif /* INET6 */ @@ -104,7 +107,8 @@ gif_clone_create(ifc, unit) sc->gif_if.if_start = gif_start; sc->gif_if.if_output = gif_output; sc->gif_if.if_type = IFT_GIF; - sc->gif_if.if_snd.ifq_maxlen = ifqmaxlen; + IFQ_SET_MAXLEN(&sc->gif_if.if_snd, ifqmaxlen); + IFQ_SET_READY(&sc->gif_if.if_snd); sc->gif_if.if_softc = sc; if_attach(&sc->gif_if); if_alloc_sadl(&sc->gif_if); @@ -147,42 +151,123 @@ void gif_start(ifp) struct ifnet *ifp; { -#if NBRIDGE > 0 - struct sockaddr dst; -#endif /* NBRIDGE */ - + struct gif_softc *sc = (struct gif_softc*)ifp; struct mbuf *m; + struct m_tag *mtag; + int family; int s; + u_int8_t tp; -#if NBRIDGE > 0 - bzero(&dst, sizeof(dst)); + /* is interface up and running? */ + if ((ifp->if_flags & (IFF_OACTIVE | IFF_UP)) != IFF_UP || + sc->gif_psrc == NULL || sc->gif_pdst == NULL) + return; - /* - * XXX The assumption here is that only the ethernet bridge - * uses the start routine of this interface, and it's thus - * safe to do this. - */ - dst.sa_family = AF_LINK; -#endif /* NBRIDGE */ + /* are the tunnel endpoints valid? */ +#ifdef INET + if (sc->gif_psrc->sa_family != AF_INET) +#endif +#ifdef INET6 + if (sc->gif_psrc->sa_family != AF_INET6) +#endif + return; + + s = splnet(); + ifp->if_flags |= IFF_OACTIVE; + splx(s); - while (ifp->if_snd.ifq_head) { + while (1) { s = splnet(); - IF_DEQUEUE(&ifp->if_snd, m); + IFQ_DEQUEUE(&ifp->if_snd, m); splx(s); if (m == NULL) - return; + break; + + /* + * gif may cause infinite recursion calls when misconfigured. + * We'll prevent this by detecting loops. + */ + for (mtag = m_tag_find(m, PACKET_TAG_GIF, NULL); mtag; + mtag = m_tag_find(m, PACKET_TAG_GIF, mtag)) { + if (!bcmp((caddr_t)(mtag + 1), &ifp, + sizeof(struct ifnet *))) { + IF_DROP(&ifp->if_snd); + log(LOG_NOTICE, "gif_output: " + "recursively called too many times\n"); + m_freem(m); + continue; + } + } + + mtag = m_tag_get(PACKET_TAG_GIF, sizeof(caddr_t), M_NOWAIT); + if (mtag == NULL) { + m_freem(m); + break; + } + bcopy(&ifp, mtag + 1, sizeof(caddr_t)); + m_tag_prepend(m, mtag); + + /* + * remove multicast and broadcast flags or encapsulated paket + * ends up as multicast or broadcast packet. + */ + m->m_flags &= ~(M_BCAST|M_MCAST); + + /* extract address family */ + tp = *mtod(m, u_int8_t *); + tp = (tp >> 4) & 0xff; /* Get the IP version number. */ +#ifdef INET + if (tp == IPVERSION) + family = AF_INET; +#endif +#ifdef INET6 + if (tp == (IPV6_VERSION >> 4)) + family = AF_INET6; +#endif #if NBRIDGE > 0 - /* Sanity check -- interface should be member of a bridge */ - if (ifp->if_bridge == NULL) + /* + * Check if the packet is comming via bridge and needs + * etherip encapsulation or not. + */ + if (ifp->if_bridge) + for (mtag = m_tag_find(m, PACKET_TAG_BRIDGE, NULL); + mtag; + mtag = m_tag_find(m, PACKET_TAG_BRIDGE, mtag)) { + if (!bcmp(&ifp->if_bridge, mtag + 1, + sizeof(caddr_t))) { + family = AF_LINK; + break; + } + } +#endif + +#if NBPFILTER > 0 + if (ifp->if_bpf) + bpf_mtap_af(ifp->if_bpf, family, m, BPF_DIRECTION_OUT); +#endif + ifp->if_opackets++; + ifp->if_obytes += m->m_pkthdr.len; + + switch (sc->gif_psrc->sa_family) { +#ifdef INET + case AF_INET: + in_gif_output(ifp, family, m); + break; +#endif +#ifdef INET6 + case AF_INET6: + in6_gif_output(ifp, family, m); + break; +#endif + default: m_freem(m); - else - gif_output(ifp, m, &dst, NULL); -#else - m_freem(m); -#endif /* NBRIDGE */ + break; + } } + + ifp->if_flags &= ~IFF_OACTIVE; } int @@ -194,7 +279,7 @@ gif_output(ifp, m, dst, rt) { struct gif_softc *sc = (struct gif_softc*)ifp; int error = 0; - struct m_tag *mtag; + int s; if (!(ifp->if_flags & IFF_UP) || sc->gif_psrc == NULL || sc->gif_pdst == NULL) { @@ -203,58 +288,37 @@ gif_output(ifp, m, dst, rt) goto end; } - /* - * gif may cause infinite recursion calls when misconfigured. - * We'll prevent this by detecting loops. - */ - for (mtag = m_tag_find(m, PACKET_TAG_GIF, NULL); mtag; - mtag = m_tag_find(m, PACKET_TAG_GIF, mtag)) { - if (!bcmp((caddr_t)(mtag + 1), &ifp, sizeof(struct ifnet *))) { - IF_DROP(&ifp->if_snd); - log(LOG_NOTICE, - "gif_output: recursively called too many times\n"); - m_freem(m); - error = EIO; /* is there better errno? */ - goto end; - } - } - - mtag = m_tag_get(PACKET_TAG_GIF, sizeof(struct ifnet *), M_NOWAIT); - if (mtag == NULL) { - IF_DROP(&ifp->if_snd); - m_freem(m); - error = ENOMEM; - goto end; - } - bcopy(&ifp, (caddr_t)(mtag + 1), sizeof(struct ifnet *)); - m_tag_prepend(m, mtag); - - m->m_flags &= ~(M_BCAST|M_MCAST); - -#if NBPFILTER > 0 - if (ifp->if_bpf) - bpf_mtap_af(ifp->if_bpf, dst->sa_family, m, BPF_DIRECTION_OUT); -#endif - ifp->if_opackets++; - ifp->if_obytes += m->m_pkthdr.len; - switch (sc->gif_psrc->sa_family) { #ifdef INET case AF_INET: - error = in_gif_output(ifp, dst->sa_family, m); break; #endif #ifdef INET6 case AF_INET6: - error = in6_gif_output(ifp, dst->sa_family, m); break; #endif default: m_freem(m); error = ENETDOWN; - break; + goto end; } + s = splnet(); + /* + * Queue message on interface, and start output if interface + * not yet active. + */ + IFQ_ENQUEUE(&ifp->if_snd, m, NULL, error); + if (error) { + /* mbuf is already freed */ + splx(s); + return (error); + } + if ((ifp->if_flags & IFF_OACTIVE) == 0) + (*ifp->if_start)(ifp); + splx(s); + return (error); + end: if (error) ifp->if_oerrors++; |