diff options
| -rw-r--r-- | include/net/sctp/sctp.h | 2 | ||||
| -rw-r--r-- | include/net/sctp/structs.h | 8 | ||||
| -rw-r--r-- | net/sctp/ipv6.c | 156 | ||||
| -rw-r--r-- | net/sctp/protocol.c | 12 | ||||
| -rw-r--r-- | net/sctp/socket.c | 33 | ||||
| -rw-r--r-- | net/sctp/transport.c | 4 | ||||
| -rw-r--r-- | net/sctp/ulpevent.c | 2 |
7 files changed, 112 insertions, 105 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index 90c1ccc..f6e7397 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -554,6 +554,8 @@ static inline void sctp_v6_map_v4(union sctp_addr *addr) static inline void sctp_v4_map_v6(union sctp_addr *addr) { addr->v6.sin6_family = AF_INET6; + addr->v6.sin6_flowinfo = 0; + addr->v6.sin6_scope_id = 0; addr->v6.sin6_port = addr->v4.sin_port; addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr; addr->v6.sin6_addr.s6_addr32[0] = 0; diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 7741d1b..4ff3f67 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -465,10 +465,6 @@ struct sctp_af { int saddr); void (*from_sk) (union sctp_addr *, struct sock *sk); - void (*to_sk_saddr) (union sctp_addr *, - struct sock *sk); - void (*to_sk_daddr) (union sctp_addr *, - struct sock *sk); void (*from_addr_param) (union sctp_addr *, union sctp_addr_param *, __be16 port, int iif); @@ -509,7 +505,9 @@ struct sctp_pf { int (*supported_addrs)(const struct sctp_sock *, __be16 *); struct sock *(*create_accept_sk) (struct sock *sk, struct sctp_association *asoc); - void (*addr_v4map) (struct sctp_sock *, union sctp_addr *); + int (*addr_to_user)(struct sctp_sock *sk, union sctp_addr *addr); + void (*to_sk_saddr)(union sctp_addr *, struct sock *sk); + void (*to_sk_daddr)(union sctp_addr *, struct sock *sk); struct sctp_af *af; }; diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 1999592..0e4198e 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -434,7 +434,7 @@ static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) /* Initialize sk->sk_rcv_saddr from sctp_addr. */ static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) { - if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { + if (addr->sa.sa_family == AF_INET) { sk->sk_v6_rcv_saddr.s6_addr32[0] = 0; sk->sk_v6_rcv_saddr.s6_addr32[1] = 0; sk->sk_v6_rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); @@ -448,7 +448,7 @@ static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) /* Initialize sk->sk_daddr from sctp_addr. */ static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) { - if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { + if (addr->sa.sa_family == AF_INET) { sk->sk_v6_daddr.s6_addr32[0] = 0; sk->sk_v6_daddr.s6_addr32[1] = 0; sk->sk_v6_daddr.s6_addr32[2] = htonl(0x0000ffff); @@ -556,8 +556,6 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) if (IPV6_ADDR_ANY == type) return 1; if (type == IPV6_ADDR_MAPPED) { - if (sp && !sp->v4mapped) - return 0; if (sp && ipv6_only_sock(sctp_opt2sk(sp))) return 0; sctp_v6_map_v4(addr); @@ -587,8 +585,6 @@ static int sctp_v6_addr_valid(union sctp_addr *addr, /* Note: This routine is used in input, so v4-mapped-v6 * are disallowed here when there is no sctp_sock. */ - if (!sp || !sp->v4mapped) - return 0; if (sp && ipv6_only_sock(sctp_opt2sk(sp))) return 0; sctp_v6_map_v4(addr); @@ -675,11 +671,23 @@ out: return newsk; } -/* Map v4 address to mapped v6 address */ -static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) +/* Format a sockaddr for return to user space. This makes sure the return is + * AF_INET or AF_INET6 depending on the SCTP_I_WANT_MAPPED_V4_ADDR option. + */ +static int sctp_v6_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr) { - if (sp->v4mapped && AF_INET == addr->sa.sa_family) - sctp_v4_map_v6(addr); + if (sp->v4mapped) { + if (addr->sa.sa_family == AF_INET) + sctp_v4_map_v6(addr); + } else { + if (addr->sa.sa_family == AF_INET6 && + ipv6_addr_v4mapped(&addr->v6.sin6_addr)) + sctp_v6_map_v4(addr); + } + + if (addr->sa.sa_family == AF_INET) + return sizeof(struct sockaddr_in); + return sizeof(struct sockaddr_in6); } /* Where did this skb come from? */ @@ -706,82 +714,68 @@ static void sctp_v6_ecn_capable(struct sock *sk) inet6_sk(sk)->tclass |= INET_ECN_ECT_0; } -/* Initialize a PF_INET6 socket msg_name. */ -static void sctp_inet6_msgname(char *msgname, int *addr_len) -{ - struct sockaddr_in6 *sin6; - - sin6 = (struct sockaddr_in6 *)msgname; - sin6->sin6_family = AF_INET6; - sin6->sin6_flowinfo = 0; - sin6->sin6_scope_id = 0; /*FIXME */ - *addr_len = sizeof(struct sockaddr_in6); -} - /* Initialize a PF_INET msgname from a ulpevent. */ static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, char *msgname, int *addrlen) { - struct sockaddr_in6 *sin6, *sin6from; - - if (msgname) { - union sctp_addr *addr; - struct sctp_association *asoc; - - asoc = event->asoc; - sctp_inet6_msgname(msgname, addrlen); - sin6 = (struct sockaddr_in6 *)msgname; - sin6->sin6_port = htons(asoc->peer.port); - addr = &asoc->peer.primary_addr; + union sctp_addr *addr; + struct sctp_association *asoc; + union sctp_addr *paddr; - /* Note: If we go to a common v6 format, this code - * will change. - */ + if (!msgname) + return; - /* Map ipv4 address into v4-mapped-on-v6 address. */ - if (sctp_sk(asoc->base.sk)->v4mapped && - AF_INET == addr->sa.sa_family) { - sctp_v4_map_v6((union sctp_addr *)sin6); - sin6->sin6_addr.s6_addr32[3] = - addr->v4.sin_addr.s_addr; - return; - } + addr = (union sctp_addr *)msgname; + asoc = event->asoc; + paddr = &asoc->peer.primary_addr; - sin6from = &asoc->peer.primary_addr.v6; - sin6->sin6_addr = sin6from->sin6_addr; - if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) - sin6->sin6_scope_id = sin6from->sin6_scope_id; + if (paddr->sa.sa_family == AF_INET) { + addr->v4.sin_family = AF_INET; + addr->v4.sin_port = htons(asoc->peer.port); + addr->v4.sin_addr = paddr->v4.sin_addr; + } else { + addr->v6.sin6_family = AF_INET6; + addr->v6.sin6_flowinfo = 0; + if (ipv6_addr_type(&paddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) + addr->v6.sin6_scope_id = paddr->v6.sin6_scope_id; + else + addr->v6.sin6_scope_id = 0; + addr->v6.sin6_port = htons(asoc->peer.port); + addr->v6.sin6_addr = paddr->v6.sin6_addr; } + + *addrlen = sctp_v6_addr_to_user(sctp_sk(asoc->base.sk), addr); } /* Initialize a msg_name from an inbound skb. */ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, int *addr_len) { + union sctp_addr *addr; struct sctphdr *sh; - struct sockaddr_in6 *sin6; - - if (msgname) { - sctp_inet6_msgname(msgname, addr_len); - sin6 = (struct sockaddr_in6 *)msgname; - sh = sctp_hdr(skb); - sin6->sin6_port = sh->source; - - /* Map ipv4 address into v4-mapped-on-v6 address. */ - if (sctp_sk(skb->sk)->v4mapped && - ip_hdr(skb)->version == 4) { - sctp_v4_map_v6((union sctp_addr *)sin6); - sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; - return; - } - /* Otherwise, just copy the v6 address. */ - sin6->sin6_addr = ipv6_hdr(skb)->saddr; - if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { + if (!msgname) + return; + + addr = (union sctp_addr *)msgname; + sh = sctp_hdr(skb); + + if (ip_hdr(skb)->version == 4) { + addr->v4.sin_family = AF_INET; + addr->v4.sin_port = sh->source; + addr->v4.sin_addr.s_addr = ip_hdr(skb)->saddr; + } else { + addr->v6.sin6_family = AF_INET6; + addr->v6.sin6_flowinfo = 0; + addr->v6.sin6_port = sh->source; + addr->v6.sin6_addr = ipv6_hdr(skb)->saddr; + if (ipv6_addr_type(&addr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { struct sctp_ulpevent *ev = sctp_skb2event(skb); - sin6->sin6_scope_id = ev->iif; + addr->v6.sin6_scope_id = ev->iif; } } + + *addr_len = sctp_v6_addr_to_user(sctp_sk(skb->sk), addr); } /* Do we support this AF? */ @@ -857,9 +851,6 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) return 0; } rcu_read_unlock(); - } else if (type == IPV6_ADDR_MAPPED) { - if (!opt->v4mapped) - return 0; } af = opt->pf->af; @@ -914,6 +905,23 @@ static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, return 1; } +/* Handle SCTP_I_WANT_MAPPED_V4_ADDR for getpeername() and getsockname() */ +static int sctp_getname(struct socket *sock, struct sockaddr *uaddr, + int *uaddr_len, int peer) +{ + int rc; + + rc = inet6_getname(sock, uaddr, uaddr_len, peer); + + if (rc != 0) + return rc; + + *uaddr_len = sctp_v6_addr_to_user(sctp_sk(sock->sk), + (union sctp_addr *)uaddr); + + return rc; +} + static const struct proto_ops inet6_seqpacket_ops = { .family = PF_INET6, .owner = THIS_MODULE, @@ -922,7 +930,7 @@ static const struct proto_ops inet6_seqpacket_ops = { .connect = inet_dgram_connect, .socketpair = sock_no_socketpair, .accept = inet_accept, - .getname = inet6_getname, + .getname = sctp_getname, .poll = sctp_poll, .ioctl = inet6_ioctl, .listen = sctp_inet_listen, @@ -974,8 +982,6 @@ static struct sctp_af sctp_af_inet6 = { .copy_addrlist = sctp_v6_copy_addrlist, .from_skb = sctp_v6_from_skb, .from_sk = sctp_v6_from_sk, - .to_sk_saddr = sctp_v6_to_sk_saddr, - .to_sk_daddr = sctp_v6_to_sk_daddr, .from_addr_param = sctp_v6_from_addr_param, .to_addr_param = sctp_v6_to_addr_param, .cmp_addr = sctp_v6_cmp_addr, @@ -1005,7 +1011,9 @@ static struct sctp_pf sctp_pf_inet6 = { .send_verify = sctp_inet6_send_verify, .supported_addrs = sctp_inet6_supported_addrs, .create_accept_sk = sctp_v6_create_accept_sk, - .addr_v4map = sctp_v6_addr_v4map, + .addr_to_user = sctp_v6_addr_to_user, + .to_sk_saddr = sctp_v6_to_sk_saddr, + .to_sk_daddr = sctp_v6_to_sk_daddr, .af = &sctp_af_inet6, }; diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 6789d785..6240834 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -576,10 +576,10 @@ out: return newsk; } -/* Map address, empty for v4 family */ -static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) +static int sctp_v4_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr) { - /* Empty */ + /* No address mapping for V4 sockets */ + return sizeof(struct sockaddr_in); } /* Dump the v4 addr to the seq file. */ @@ -976,7 +976,9 @@ static struct sctp_pf sctp_pf_inet = { .send_verify = sctp_inet_send_verify, .supported_addrs = sctp_inet_supported_addrs, .create_accept_sk = sctp_v4_create_accept_sk, - .addr_v4map = sctp_v4_addr_v4map, + .addr_to_user = sctp_v4_addr_to_user, + .to_sk_saddr = sctp_v4_to_sk_saddr, + .to_sk_daddr = sctp_v4_to_sk_daddr, .af = &sctp_af_inet }; @@ -1047,8 +1049,6 @@ static struct sctp_af sctp_af_inet = { .copy_addrlist = sctp_v4_copy_addrlist, .from_skb = sctp_v4_from_skb, .from_sk = sctp_v4_from_sk, - .to_sk_saddr = sctp_v4_to_sk_saddr, - .to_sk_daddr = sctp_v4_to_sk_daddr, .from_addr_param = sctp_v4_from_addr_param, .to_addr_param = sctp_v4_to_addr_param, .cmp_addr = sctp_v4_cmp_addr, diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 743308f..eb71d49 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -254,7 +254,7 @@ static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, if (id_asoc && (id_asoc != addr_asoc)) return NULL; - sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), + sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), (union sctp_addr *)addr); return transport; @@ -396,7 +396,7 @@ static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) /* Copy back into socket for getsockname() use. */ if (!ret) { inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); - af->to_sk_saddr(addr, sk); + sp->pf->to_sk_saddr(addr, sk); } return ret; @@ -1053,7 +1053,6 @@ static int __sctp_connect(struct sock *sk, struct sctp_association *asoc2; struct sctp_transport *transport; union sctp_addr to; - struct sctp_af *af; sctp_scope_t scope; long timeo; int err = 0; @@ -1081,6 +1080,8 @@ static int __sctp_connect(struct sock *sk, /* Walk through the addrs buffer and count the number of addresses. */ addr_buf = kaddrs; while (walk_size < addrs_size) { + struct sctp_af *af; + if (walk_size + sizeof(sa_family_t) > addrs_size) { err = -EINVAL; goto out_free; @@ -1205,8 +1206,7 @@ static int __sctp_connect(struct sock *sk, /* Initialize sk's dport and daddr for getpeername() */ inet_sk(sk)->inet_dport = htons(asoc->peer.port); - af = sctp_get_af_specific(sa_addr->sa.sa_family); - af->to_sk_daddr(sa_addr, sk); + sp->pf->to_sk_daddr(sa_addr, sk); sk->sk_err = 0; /* in-kernel sockets don't generally have a file allocated to them @@ -4255,7 +4255,7 @@ static int sctp_getsockopt_sctp_status(struct sock *sk, int len, memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, transport->af_specific->sockaddr_len); /* Map ipv4 address into v4-mapped-on-v6 address. */ - sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), + sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk), (union sctp_addr *)&status.sstat_primary.spinfo_address); status.sstat_primary.spinfo_state = transport->state; status.sstat_primary.spinfo_cwnd = transport->cwnd; @@ -4413,8 +4413,8 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) { struct sctp_association *asoc = sctp_id2assoc(sk, id); + struct sctp_sock *sp = sctp_sk(sk); struct socket *sock; - struct sctp_af *af; int err = 0; if (!asoc) @@ -4436,8 +4436,7 @@ int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) /* Make peeled-off sockets more like 1-1 accepted sockets. * Set the daddr and initialize id to something more random */ - af = sctp_get_af_specific(asoc->peer.primary_addr.sa.sa_family); - af->to_sk_daddr(&asoc->peer.primary_addr, sk); + sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk); /* Populate the fields of the newsk from the oldsk and migrate the * asoc to the newsk. @@ -4821,8 +4820,8 @@ static int sctp_getsockopt_peer_addrs(struct sock *sk, int len, list_for_each_entry(from, &asoc->peer.transport_addr_list, transports) { memcpy(&temp, &from->ipaddr, sizeof(temp)); - sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, &temp); - addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len; + addrlen = sctp_get_pf_specific(sk->sk_family) + ->addr_to_user(sp, &temp); if (space_left < addrlen) return -ENOMEM; if (copy_to_user(to, &temp, addrlen)) @@ -4866,9 +4865,9 @@ static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to, if (!temp.v4.sin_port) temp.v4.sin_port = htons(port); - sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), - &temp); - addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len; + addrlen = sctp_get_pf_specific(sk->sk_family) + ->addr_to_user(sctp_sk(sk), &temp); + if (space_left < addrlen) { cnt = -ENOMEM; break; @@ -4956,8 +4955,8 @@ static int sctp_getsockopt_local_addrs(struct sock *sk, int len, */ list_for_each_entry(addr, &bp->address_list, list) { memcpy(&temp, &addr->a, sizeof(temp)); - sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, &temp); - addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len; + addrlen = sctp_get_pf_specific(sk->sk_family) + ->addr_to_user(sp, &temp); if (space_left < addrlen) { err = -ENOMEM; /*fixme: right error?*/ goto out; @@ -5016,7 +5015,7 @@ static int sctp_getsockopt_primary_addr(struct sock *sk, int len, memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr, asoc->peer.primary_path->af_specific->sockaddr_len); - sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, + sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp, (union sctp_addr *)&prim.ssp_addr); if (put_user(len, optlen)) diff --git a/net/sctp/transport.c b/net/sctp/transport.c index b10e047..a0a4318 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -289,8 +289,8 @@ void sctp_transport_route(struct sctp_transport *transport, */ if (asoc && (!asoc->peer.primary_path || (transport == asoc->peer.active_path))) - opt->pf->af->to_sk_saddr(&transport->saddr, - asoc->base.sk); + opt->pf->to_sk_saddr(&transport->saddr, + asoc->base.sk); } else transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT; } diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c index e049298..d1e3830 100644 --- a/net/sctp/ulpevent.c +++ b/net/sctp/ulpevent.c @@ -341,7 +341,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change( memcpy(&spc->spc_aaddr, aaddr, sizeof(struct sockaddr_storage)); /* Map ipv4 address into v4-mapped-on-v6 address. */ - sctp_get_pf_specific(asoc->base.sk->sk_family)->addr_v4map( + sctp_get_pf_specific(asoc->base.sk->sk_family)->addr_to_user( sctp_sk(asoc->base.sk), (union sctp_addr *)&spc->spc_aaddr); 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