diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index e62d6cbdf9bc6..427b91aca50d3 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -50,8 +51,14 @@ struct pdp_ctx { u8 gtp_version; u16 af; - struct in_addr ms_addr_ip4; - struct in_addr peer_addr_ip4; + union { + struct in_addr addr; + struct in6_addr addr6; + } ms; + union { + struct in_addr addr; + struct in6_addr addr6; + } peer; struct sock *sk; struct net_device *dev; @@ -80,9 +87,15 @@ struct gtp_dev { }; struct echo_info { - struct in_addr ms_addr_ip4; - struct in_addr peer_addr_ip4; + u16 af; u8 gtp_version; + + union { + struct in_addr addr; + } ms; + union { + struct in_addr addr; + } peer; }; static unsigned int gtp_net_id __read_mostly; @@ -121,8 +134,14 @@ static inline u32 ipv4_hashfn(__be32 ip) return jhash_1word((__force u32)ip, gtp_h_initval); } +static u32 ipv6_hashfn(const struct in6_addr *ip6) +{ + return jhash_2words((__force u32)ip6->s6_addr32[0], + (__force u32)ip6->s6_addr32[1], gtp_h_initval); +} + /* Resolve a PDP context structure based on the 64bit TID. */ -static struct pdp_ctx *gtp0_pdp_find(struct gtp_dev *gtp, u64 tid) +static struct pdp_ctx *gtp0_pdp_find(struct gtp_dev *gtp, u64 tid, u16 family) { struct hlist_head *head; struct pdp_ctx *pdp; @@ -130,7 +149,8 @@ static struct pdp_ctx *gtp0_pdp_find(struct gtp_dev *gtp, u64 tid) head = >p->tid_hash[gtp0_hashfn(tid) % gtp->hash_size]; hlist_for_each_entry_rcu(pdp, head, hlist_tid) { - if (pdp->gtp_version == GTP_V0 && + if (pdp->af == family && + pdp->gtp_version == GTP_V0 && pdp->u.v0.tid == tid) return pdp; } @@ -138,7 +158,7 @@ static struct pdp_ctx *gtp0_pdp_find(struct gtp_dev *gtp, u64 tid) } /* Resolve a PDP context structure based on the 32bit TEI. */ -static struct pdp_ctx *gtp1_pdp_find(struct gtp_dev *gtp, u32 tid) +static struct pdp_ctx *gtp1_pdp_find(struct gtp_dev *gtp, u32 tid, u16 family) { struct hlist_head *head; struct pdp_ctx *pdp; @@ -146,7 +166,8 @@ static struct pdp_ctx *gtp1_pdp_find(struct gtp_dev *gtp, u32 tid) head = >p->tid_hash[gtp1u_hashfn(tid) % gtp->hash_size]; hlist_for_each_entry_rcu(pdp, head, hlist_tid) { - if (pdp->gtp_version == GTP_V1 && + if (pdp->af == family && + pdp->gtp_version == GTP_V1 && pdp->u.v1.i_tei == tid) return pdp; } @@ -163,7 +184,42 @@ static struct pdp_ctx *ipv4_pdp_find(struct gtp_dev *gtp, __be32 ms_addr) hlist_for_each_entry_rcu(pdp, head, hlist_addr) { if (pdp->af == AF_INET && - pdp->ms_addr_ip4.s_addr == ms_addr) + pdp->ms.addr.s_addr == ms_addr) + return pdp; + } + + return NULL; +} + +/* 3GPP TS 29.060: PDN Connection: the association between a MS represented by + * [...] one IPv6 *prefix* and a PDN represented by an APN. + * + * Then, 3GPP TS 29.061, Section 11.2.1.3 says: The size of the prefix shall be + * according to the maximum prefix length for a global IPv6 address as + * specified in the IPv6 Addressing Architecture, see RFC 4291. + * + * Finally, RFC 4291 section 2.5.4 states: All Global Unicast addresses other + * than those that start with binary 000 have a 64-bit interface ID field + * (i.e., n + m = 64). + */ +static bool ipv6_pdp_addr_equal(const struct in6_addr *a, + const struct in6_addr *b) +{ + return a->s6_addr32[0] == b->s6_addr32[0] && + a->s6_addr32[1] == b->s6_addr32[1]; +} + +static struct pdp_ctx *ipv6_pdp_find(struct gtp_dev *gtp, + const struct in6_addr *ms_addr) +{ + struct hlist_head *head; + struct pdp_ctx *pdp; + + head = >p->addr_hash[ipv6_hashfn(ms_addr) % gtp->hash_size]; + + hlist_for_each_entry_rcu(pdp, head, hlist_addr) { + if (pdp->af == AF_INET6 && + ipv6_pdp_addr_equal(&pdp->ms.addr6, ms_addr)) return pdp; } @@ -181,34 +237,85 @@ static bool gtp_check_ms_ipv4(struct sk_buff *skb, struct pdp_ctx *pctx, iph = (struct iphdr *)(skb->data + hdrlen); if (role == GTP_ROLE_SGSN) - return iph->daddr == pctx->ms_addr_ip4.s_addr; + return iph->daddr == pctx->ms.addr.s_addr; else - return iph->saddr == pctx->ms_addr_ip4.s_addr; + return iph->saddr == pctx->ms.addr.s_addr; +} + +static bool gtp_check_ms_ipv6(struct sk_buff *skb, struct pdp_ctx *pctx, + unsigned int hdrlen, unsigned int role) +{ + struct ipv6hdr *ip6h; + int ret; + + if (!pskb_may_pull(skb, hdrlen + sizeof(struct ipv6hdr))) + return false; + + ip6h = (struct ipv6hdr *)(skb->data + hdrlen); + + if ((ipv6_addr_type(&ip6h->saddr) & IPV6_ADDR_LINKLOCAL) || + (ipv6_addr_type(&ip6h->daddr) & IPV6_ADDR_LINKLOCAL)) + return false; + + if (role == GTP_ROLE_SGSN) { + ret = ipv6_pdp_addr_equal(&ip6h->daddr, &pctx->ms.addr6); + } else { + ret = ipv6_pdp_addr_equal(&ip6h->saddr, &pctx->ms.addr6); + } + + return ret; } /* Check if the inner IP address in this packet is assigned to any * existing mobile subscriber. */ static bool gtp_check_ms(struct sk_buff *skb, struct pdp_ctx *pctx, - unsigned int hdrlen, unsigned int role) + unsigned int hdrlen, unsigned int role, + __u16 inner_proto) { - switch (ntohs(skb->protocol)) { + switch (inner_proto) { case ETH_P_IP: return gtp_check_ms_ipv4(skb, pctx, hdrlen, role); + case ETH_P_IPV6: + return gtp_check_ms_ipv6(skb, pctx, hdrlen, role); } return false; } +static int gtp_inner_proto(struct sk_buff *skb, unsigned int hdrlen, + __u16 *inner_proto) +{ + __u8 *ip_version, _ip_version; + + ip_version = skb_header_pointer(skb, hdrlen, sizeof(*ip_version), + &_ip_version); + if (!ip_version) + return -1; + + switch (*ip_version & 0xf0) { + case 0x40: + *inner_proto = ETH_P_IP; + break; + case 0x60: + *inner_proto = ETH_P_IPV6; + break; + default: + return -1; + } + + return 0; +} + static int gtp_rx(struct pdp_ctx *pctx, struct sk_buff *skb, - unsigned int hdrlen, unsigned int role) + unsigned int hdrlen, unsigned int role, __u16 inner_proto) { - if (!gtp_check_ms(skb, pctx, hdrlen, role)) { + if (!gtp_check_ms(skb, pctx, hdrlen, role, inner_proto)) { netdev_dbg(pctx->dev, "No PDP ctx for this MS\n"); return 1; } /* Get rid of the GTP + UDP headers. */ - if (iptunnel_pull_header(skb, hdrlen, skb->protocol, + if (iptunnel_pull_header(skb, hdrlen, htons(inner_proto), !net_eq(sock_net(pctx->sk), dev_net(pctx->dev)))) { pctx->dev->stats.rx_length_errors++; goto err; @@ -250,6 +357,27 @@ static struct rtable *ip4_route_output_gtp(struct flowi4 *fl4, return ip_route_output_key(sock_net(sk), fl4); } +static struct rt6_info *ip6_route_output_gtp(struct net *net, + struct flowi6 *fl6, + const struct sock *sk, + const struct in6_addr *daddr, + struct in6_addr *saddr) +{ + struct dst_entry *dst; + + memset(fl6, 0, sizeof(*fl6)); + fl6->flowi6_oif = sk->sk_bound_dev_if; + fl6->daddr = *daddr; + fl6->saddr = *saddr; + fl6->flowi6_proto = sk->sk_protocol; + + dst = ipv6_stub->ipv6_dst_lookup_flow(net, sk, fl6, NULL); + if (IS_ERR(dst)) + return ERR_PTR(-ENETUNREACH); + + return (struct rt6_info *)dst; +} + /* GSM TS 09.60. 7.3 * In all Path Management messages: * - TID: is not used and shall be set to 0. @@ -292,13 +420,39 @@ static void gtp0_build_echo_msg(struct gtp0_header *hdr, __u8 msg_type) hdr->length = 0; } +static int gtp0_send_echo_resp_ip(struct gtp_dev *gtp, struct sk_buff *skb) +{ + struct iphdr *iph = ip_hdr(skb); + struct flowi4 fl4; + struct rtable *rt; + + /* find route to the sender, + * src address becomes dst address and vice versa. + */ + rt = ip4_route_output_gtp(&fl4, gtp->sk0, iph->saddr, iph->daddr); + if (IS_ERR(rt)) { + netdev_dbg(gtp->dev, "no route for echo response from %pI4\n", + &iph->saddr); + return -1; + } + + udp_tunnel_xmit_skb(rt, gtp->sk0, skb, + fl4.saddr, fl4.daddr, + iph->tos, + ip4_dst_hoplimit(&rt->dst), + 0, + htons(GTP0_PORT), htons(GTP0_PORT), + !net_eq(sock_net(gtp->sk1u), + dev_net(gtp->dev)), + false); + + return 0; +} + static int gtp0_send_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) { struct gtp0_packet *gtp_pkt; struct gtp0_header *gtp0; - struct rtable *rt; - struct flowi4 fl4; - struct iphdr *iph; __be16 seq; gtp0 = (struct gtp0_header *)(skb->data + sizeof(struct udphdr)); @@ -325,27 +479,15 @@ static int gtp0_send_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) gtp_pkt->ie.tag = GTPIE_RECOVERY; gtp_pkt->ie.val = gtp->restart_count; - iph = ip_hdr(skb); - - /* find route to the sender, - * src address becomes dst address and vice versa. - */ - rt = ip4_route_output_gtp(&fl4, gtp->sk0, iph->saddr, iph->daddr); - if (IS_ERR(rt)) { - netdev_dbg(gtp->dev, "no route for echo response from %pI4\n", - &iph->saddr); + switch (gtp->sk0->sk_family) { + case AF_INET: + if (gtp0_send_echo_resp_ip(gtp, skb) < 0) + return -1; + break; + case AF_INET6: return -1; } - udp_tunnel_xmit_skb(rt, gtp->sk0, skb, - fl4.saddr, fl4.daddr, - iph->tos, - ip4_dst_hoplimit(&rt->dst), - 0, - htons(GTP0_PORT), htons(GTP0_PORT), - !net_eq(sock_net(gtp->sk1u), - dev_net(gtp->dev)), - false); return 0; } @@ -360,8 +502,8 @@ static int gtp_genl_fill_echo(struct sk_buff *skb, u32 snd_portid, u32 snd_seq, goto failure; if (nla_put_u32(skb, GTPA_VERSION, echo.gtp_version) || - nla_put_be32(skb, GTPA_PEER_ADDRESS, echo.peer_addr_ip4.s_addr) || - nla_put_be32(skb, GTPA_MS_ADDRESS, echo.ms_addr_ip4.s_addr)) + nla_put_be32(skb, GTPA_PEER_ADDRESS, echo.peer.addr.s_addr) || + nla_put_be32(skb, GTPA_MS_ADDRESS, echo.ms.addr.s_addr)) goto failure; genlmsg_end(skb, genlh); @@ -372,12 +514,20 @@ static int gtp_genl_fill_echo(struct sk_buff *skb, u32 snd_portid, u32 snd_seq, return -EMSGSIZE; } +static void gtp0_handle_echo_resp_ip(struct sk_buff *skb, struct echo_info *echo) +{ + struct iphdr *iph = ip_hdr(skb); + + echo->ms.addr.s_addr = iph->daddr; + echo->peer.addr.s_addr = iph->saddr; + echo->gtp_version = GTP_V0; +} + static int gtp0_handle_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) { struct gtp0_header *gtp0; struct echo_info echo; struct sk_buff *msg; - struct iphdr *iph; int ret; gtp0 = (struct gtp0_header *)(skb->data + sizeof(struct udphdr)); @@ -385,10 +535,13 @@ static int gtp0_handle_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) if (!gtp0_validate_echo_hdr(gtp0)) return -1; - iph = ip_hdr(skb); - echo.ms_addr_ip4.s_addr = iph->daddr; - echo.peer_addr_ip4.s_addr = iph->saddr; - echo.gtp_version = GTP_V0; + switch (gtp->sk0->sk_family) { + case AF_INET: + gtp0_handle_echo_resp_ip(skb, &echo); + break; + case AF_INET6: + return -1; + } msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!msg) @@ -404,6 +557,21 @@ static int gtp0_handle_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) msg, 0, GTP_GENL_MCGRP, GFP_ATOMIC); } +static int gtp_proto_to_family(__u16 proto) +{ + switch (proto) { + case ETH_P_IP: + return AF_INET; + case ETH_P_IPV6: + return AF_INET6; + default: + WARN_ON_ONCE(1); + break; + } + + return AF_UNSPEC; +} + /* 1 means pass up to the stack, -1 means drop and 0 means decapsulated. */ static int gtp0_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb) { @@ -411,6 +579,7 @@ static int gtp0_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb) sizeof(struct gtp0_header); struct gtp0_header *gtp0; struct pdp_ctx *pctx; + __u16 inner_proto; if (!pskb_may_pull(skb, hdrlen)) return -1; @@ -433,13 +602,19 @@ static int gtp0_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb) if (gtp0->type != GTP_TPDU) return 1; - pctx = gtp0_pdp_find(gtp, be64_to_cpu(gtp0->tid)); + if (gtp_inner_proto(skb, hdrlen, &inner_proto) < 0) { + netdev_dbg(gtp->dev, "GTP packet does not encapsulate an IP packet\n"); + return -1; + } + + pctx = gtp0_pdp_find(gtp, be64_to_cpu(gtp0->tid), + gtp_proto_to_family(inner_proto)); if (!pctx) { netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb); return 1; } - return gtp_rx(pctx, skb, hdrlen, gtp->role); + return gtp_rx(pctx, skb, hdrlen, gtp->role, inner_proto); } /* msg_type has to be GTP_ECHO_REQ or GTP_ECHO_RSP */ @@ -549,8 +724,8 @@ static int gtp1u_handle_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) return -1; iph = ip_hdr(skb); - echo.ms_addr_ip4.s_addr = iph->daddr; - echo.peer_addr_ip4.s_addr = iph->saddr; + echo.ms.addr.s_addr = iph->daddr; + echo.peer.addr.s_addr = iph->saddr; echo.gtp_version = GTP_V1; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); @@ -567,12 +742,50 @@ static int gtp1u_handle_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) msg, 0, GTP_GENL_MCGRP, GFP_ATOMIC); } +static int gtp_parse_exthdrs(struct sk_buff *skb, unsigned int *hdrlen) +{ + struct gtp_ext_hdr *gtp_exthdr, _gtp_exthdr; + unsigned int offset = *hdrlen; + __u8 *next_type, _next_type; + + /* From 29.060: "The Extension Header Length field specifies the length + * of the particular Extension header in 4 octets units." + * + * This length field includes length field size itself (1 byte), + * payload (variable length) and next type (1 byte). The extension + * header is aligned to to 4 bytes. + */ + + do { + gtp_exthdr = skb_header_pointer(skb, offset, sizeof(*gtp_exthdr), + &_gtp_exthdr); + if (!gtp_exthdr || !gtp_exthdr->len) + return -1; + + offset += gtp_exthdr->len * 4; + + /* From 29.060: "If no such Header follows, then the value of + * the Next Extension Header Type shall be 0." + */ + next_type = skb_header_pointer(skb, offset - 1, + sizeof(_next_type), &_next_type); + if (!next_type) + return -1; + + } while (*next_type != 0); + + *hdrlen = offset; + + return 0; +} + static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb) { unsigned int hdrlen = sizeof(struct udphdr) + sizeof(struct gtp1_header); struct gtp1_header *gtp1; struct pdp_ctx *pctx; + __u16 inner_proto; if (!pskb_may_pull(skb, hdrlen)) return -1; @@ -608,15 +821,25 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb) if (!pskb_may_pull(skb, hdrlen)) return -1; + if (gtp_inner_proto(skb, hdrlen, &inner_proto) < 0) { + netdev_dbg(gtp->dev, "GTP packet does not encapsulate an IP packet\n"); + return -1; + } + gtp1 = (struct gtp1_header *)(skb->data + sizeof(struct udphdr)); - pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid)); + pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid), + gtp_proto_to_family(inner_proto)); if (!pctx) { netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb); return 1; } - return gtp_rx(pctx, skb, hdrlen, gtp->role); + if (gtp1->flags & GTP1_F_EXTHDR && + gtp_parse_exthdrs(skb, &hdrlen) < 0) + return -1; + + return gtp_rx(pctx, skb, hdrlen, gtp->role, inner_proto); } static void __gtp_encap_destroy(struct sock *sk) @@ -760,11 +983,17 @@ static inline void gtp1_push_header(struct sk_buff *skb, struct pdp_ctx *pctx) struct gtp_pktinfo { struct sock *sk; - struct iphdr *iph; - struct flowi4 fl4; - struct rtable *rt; + union { + struct flowi4 fl4; + struct flowi6 fl6; + }; + union { + struct rtable *rt; + struct rt6_info *rt6; + }; struct pdp_ctx *pctx; struct net_device *dev; + __u8 tos; __be16 gtph_port; }; @@ -783,64 +1012,61 @@ static void gtp_push_header(struct sk_buff *skb, struct gtp_pktinfo *pktinfo) } static inline void gtp_set_pktinfo_ipv4(struct gtp_pktinfo *pktinfo, - struct sock *sk, struct iphdr *iph, + struct sock *sk, __u8 tos, struct pdp_ctx *pctx, struct rtable *rt, struct flowi4 *fl4, struct net_device *dev) { pktinfo->sk = sk; - pktinfo->iph = iph; + pktinfo->tos = tos; pktinfo->pctx = pctx; pktinfo->rt = rt; pktinfo->fl4 = *fl4; pktinfo->dev = dev; } -static int gtp_build_skb_ip4(struct sk_buff *skb, struct net_device *dev, - struct gtp_pktinfo *pktinfo) +static void gtp_set_pktinfo_ipv6(struct gtp_pktinfo *pktinfo, + struct sock *sk, __u8 tos, + struct pdp_ctx *pctx, struct rt6_info *rt6, + struct flowi6 *fl6, + struct net_device *dev) +{ + pktinfo->sk = sk; + pktinfo->tos = tos; + pktinfo->pctx = pctx; + pktinfo->rt6 = rt6; + pktinfo->fl6 = *fl6; + pktinfo->dev = dev; +} + +static int gtp_build_skb_outer_ip4(struct sk_buff *skb, struct net_device *dev, + struct gtp_pktinfo *pktinfo, + struct pdp_ctx *pctx, __u8 tos, + __be16 frag_off) { - struct gtp_dev *gtp = netdev_priv(dev); - struct pdp_ctx *pctx; struct rtable *rt; struct flowi4 fl4; - struct iphdr *iph; __be16 df; int mtu; - /* Read the IP destination address and resolve the PDP context. - * Prepend PDP header with TEI/TID from PDP ctx. - */ - iph = ip_hdr(skb); - if (gtp->role == GTP_ROLE_SGSN) - pctx = ipv4_pdp_find(gtp, iph->saddr); - else - pctx = ipv4_pdp_find(gtp, iph->daddr); - - if (!pctx) { - netdev_dbg(dev, "no PDP ctx found for %pI4, skip\n", - &iph->daddr); - return -ENOENT; - } - netdev_dbg(dev, "found PDP context %p\n", pctx); - - rt = ip4_route_output_gtp(&fl4, pctx->sk, pctx->peer_addr_ip4.s_addr, + rt = ip4_route_output_gtp(&fl4, pctx->sk, pctx->peer.addr.s_addr, inet_sk(pctx->sk)->inet_saddr); if (IS_ERR(rt)) { netdev_dbg(dev, "no route to SSGN %pI4\n", - &pctx->peer_addr_ip4.s_addr); + &pctx->peer.addr.s_addr); dev->stats.tx_carrier_errors++; goto err; } if (rt->dst.dev == dev) { netdev_dbg(dev, "circular route to SSGN %pI4\n", - &pctx->peer_addr_ip4.s_addr); + &pctx->peer.addr.s_addr); dev->stats.collisions++; goto err_rt; } /* This is similar to tnl_update_pmtu(). */ - df = iph->frag_off; + df = frag_off; if (df) { mtu = dst_mtu(&rt->dst) - dev->hard_header_len - sizeof(struct iphdr) - sizeof(struct udphdr); @@ -858,7 +1084,7 @@ static int gtp_build_skb_ip4(struct sk_buff *skb, struct net_device *dev, skb_dst_update_pmtu_no_confirm(skb, mtu); - if (iph->frag_off & htons(IP_DF) && + if (frag_off & htons(IP_DF) && ((!skb_is_gso(skb) && skb->len > mtu) || (skb_is_gso(skb) && !skb_gso_validate_network_len(skb, mtu)))) { netdev_dbg(dev, "packet too big, fragmentation needed\n"); @@ -867,7 +1093,7 @@ static int gtp_build_skb_ip4(struct sk_buff *skb, struct net_device *dev, goto err_rt; } - gtp_set_pktinfo_ipv4(pktinfo, pctx->sk, iph, pctx, rt, &fl4, dev); + gtp_set_pktinfo_ipv4(pktinfo, pctx->sk, tos, pctx, rt, &fl4, dev); gtp_push_header(skb, pktinfo); return 0; @@ -877,6 +1103,162 @@ static int gtp_build_skb_ip4(struct sk_buff *skb, struct net_device *dev, return -EBADMSG; } +static int gtp_build_skb_outer_ip6(struct net *net, struct sk_buff *skb, + struct net_device *dev, + struct gtp_pktinfo *pktinfo, + struct pdp_ctx *pctx, __u8 tos) +{ + struct dst_entry *dst; + struct rt6_info *rt; + struct flowi6 fl6; + int mtu; + + rt = ip6_route_output_gtp(net, &fl6, pctx->sk, &pctx->peer.addr6, + &inet6_sk(pctx->sk)->saddr); + if (IS_ERR(rt)) { + netdev_dbg(dev, "no route to SSGN %pI6\n", + &pctx->peer.addr6); + dev->stats.tx_carrier_errors++; + goto err; + } + dst = &rt->dst; + + if (rt->dst.dev == dev) { + netdev_dbg(dev, "circular route to SSGN %pI6\n", + &pctx->peer.addr6); + dev->stats.collisions++; + goto err_rt; + } + + mtu = dst_mtu(&rt->dst) - dev->hard_header_len - + sizeof(struct ipv6hdr) - sizeof(struct udphdr); + switch (pctx->gtp_version) { + case GTP_V0: + mtu -= sizeof(struct gtp0_header); + break; + case GTP_V1: + mtu -= sizeof(struct gtp1_header); + break; + } + + skb_dst_update_pmtu_no_confirm(skb, mtu); + + if ((!skb_is_gso(skb) && skb->len > mtu) || + (skb_is_gso(skb) && !skb_gso_validate_network_len(skb, mtu))) { + netdev_dbg(dev, "packet too big, fragmentation needed\n"); + icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); + goto err_rt; + } + + gtp_set_pktinfo_ipv6(pktinfo, pctx->sk, tos, pctx, rt, &fl6, dev); + gtp_push_header(skb, pktinfo); + + return 0; +err_rt: + dst_release(dst); +err: + return -EBADMSG; +} + +static int gtp_build_skb_ip4(struct sk_buff *skb, struct net_device *dev, + struct gtp_pktinfo *pktinfo) +{ + struct gtp_dev *gtp = netdev_priv(dev); + struct net *net = gtp->net; + struct pdp_ctx *pctx; + struct iphdr *iph; + int ret; + + /* Read the IP destination address and resolve the PDP context. + * Prepend PDP header with TEI/TID from PDP ctx. + */ + iph = ip_hdr(skb); + if (gtp->role == GTP_ROLE_SGSN) + pctx = ipv4_pdp_find(gtp, iph->saddr); + else + pctx = ipv4_pdp_find(gtp, iph->daddr); + + if (!pctx) { + netdev_dbg(dev, "no PDP ctx found for %pI4, skip\n", + &iph->daddr); + return -ENOENT; + } + netdev_dbg(dev, "found PDP context %p\n", pctx); + + switch (pctx->sk->sk_family) { + case AF_INET: + ret = gtp_build_skb_outer_ip4(skb, dev, pktinfo, pctx, + iph->tos, iph->frag_off); + break; + case AF_INET6: + ret = gtp_build_skb_outer_ip6(net, skb, dev, pktinfo, pctx, + iph->tos); + break; + default: + ret = -1; + WARN_ON_ONCE(1); + break; + } + + if (ret < 0) + return ret; + + netdev_dbg(dev, "gtp -> IP src: %pI4 dst: %pI4\n", + &iph->saddr, &iph->daddr); + + return 0; +} + +static int gtp_build_skb_ip6(struct sk_buff *skb, struct net_device *dev, + struct gtp_pktinfo *pktinfo) +{ + struct gtp_dev *gtp = netdev_priv(dev); + struct net *net = gtp->net; + struct pdp_ctx *pctx; + struct ipv6hdr *ip6h; + __u8 tos; + int ret; + + /* Read the IP destination address and resolve the PDP context. + * Prepend PDP header with TEI/TID from PDP ctx. + */ + ip6h = ipv6_hdr(skb); + if (gtp->role == GTP_ROLE_SGSN) + pctx = ipv6_pdp_find(gtp, &ip6h->saddr); + else + pctx = ipv6_pdp_find(gtp, &ip6h->daddr); + + if (!pctx) { + netdev_dbg(dev, "no PDP ctx found for %pI6, skip\n", + &ip6h->daddr); + return -ENOENT; + } + netdev_dbg(dev, "found PDP context %p\n", pctx); + + tos = ipv6_get_dsfield(ip6h); + + switch (pctx->sk->sk_family) { + case AF_INET: + ret = gtp_build_skb_outer_ip4(skb, dev, pktinfo, pctx, tos, 0); + break; + case AF_INET6: + ret = gtp_build_skb_outer_ip6(net, skb, dev, pktinfo, pctx, tos); + break; + default: + ret = -1; + WARN_ON_ONCE(1); + break; + } + + if (ret < 0) + return ret; + + netdev_dbg(dev, "gtp -> IP src: %pI6 dst: %pI6\n", + &ip6h->saddr, &ip6h->daddr); + + return 0; +} + static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) { unsigned int proto = ntohs(skb->protocol); @@ -895,6 +1277,9 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) case ETH_P_IP: err = gtp_build_skb_ip4(skb, dev, &pktinfo); break; + case ETH_P_IPV6: + err = gtp_build_skb_ip6(skb, dev, &pktinfo); + break; default: err = -EOPNOTSUPP; break; @@ -904,13 +1289,11 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) if (err < 0) goto tx_err; - switch (proto) { - case ETH_P_IP: - netdev_dbg(pktinfo.dev, "gtp -> IP src: %pI4 dst: %pI4\n", - &pktinfo.iph->saddr, &pktinfo.iph->daddr); + switch (pktinfo.pctx->sk->sk_family) { + case AF_INET: udp_tunnel_xmit_skb(pktinfo.rt, pktinfo.sk, skb, pktinfo.fl4.saddr, pktinfo.fl4.daddr, - pktinfo.iph->tos, + pktinfo.tos, ip4_dst_hoplimit(&pktinfo.rt->dst), 0, pktinfo.gtph_port, pktinfo.gtph_port, @@ -918,6 +1301,19 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) dev_net(dev)), false); break; + case AF_INET6: +#if IS_ENABLED(CONFIG_IPV6) + udp_tunnel6_xmit_skb(&pktinfo.rt6->dst, pktinfo.sk, skb, dev, + &pktinfo.fl6.saddr, &pktinfo.fl6.daddr, + pktinfo.tos, + ip6_dst_hoplimit(&pktinfo.rt->dst), + 0, + pktinfo.gtph_port, pktinfo.gtph_port, + false); +#else + goto tx_err; +#endif + break; } return NETDEV_TX_OK; @@ -936,11 +1332,11 @@ static const struct device_type gtp_type = { .name = "gtp", }; +#define GTP_TH_MAXLEN (sizeof(struct udphdr) + sizeof(struct gtp0_header)) +#define GTP_IPV4_MAXLEN (sizeof(struct iphdr) + GTP_TH_MAXLEN) + static void gtp_link_setup(struct net_device *dev) { - unsigned int max_gtp_header_len = sizeof(struct iphdr) + - sizeof(struct udphdr) + - sizeof(struct gtp0_header); struct gtp_dev *gtp = netdev_priv(dev); dev->netdev_ops = >p_netdev_ops; @@ -949,7 +1345,7 @@ static void gtp_link_setup(struct net_device *dev) dev->hard_header_len = 0; dev->addr_len = 0; - dev->mtu = ETH_DATA_LEN - max_gtp_header_len; + dev->mtu = ETH_DATA_LEN - GTP_IPV4_MAXLEN; /* Zero header length. */ dev->type = ARPHRD_NONE; @@ -960,7 +1356,7 @@ static void gtp_link_setup(struct net_device *dev) dev->features |= NETIF_F_LLTX; netif_keep_dst(dev); - dev->needed_headroom = LL_MAX_HEADER + max_gtp_header_len; + dev->needed_headroom = LL_MAX_HEADER + GTP_IPV4_MAXLEN; gtp->dev = dev; } @@ -975,17 +1371,45 @@ static void gtp_destructor(struct net_device *dev) kfree(gtp->tid_hash); } -static struct sock *gtp_create_sock(int type, struct gtp_dev *gtp) +static int gtp_sock_udp_config(struct udp_port_cfg *udp_conf, + const struct nlattr *nla, int family) +{ + udp_conf->family = family; + + switch (udp_conf->family) { + case AF_INET: + udp_conf->local_ip.s_addr = nla_get_be32(nla); + break; +#if IS_ENABLED(CONFIG_IPV6) + case AF_INET6: + udp_conf->local_ip6 = nla_get_in6_addr(nla); + break; +#endif + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static struct sock *gtp_create_sock(int type, struct gtp_dev *gtp, + const struct nlattr *nla, int family) { struct udp_tunnel_sock_cfg tuncfg = {}; - struct udp_port_cfg udp_conf = { - .local_ip.s_addr = htonl(INADDR_ANY), - .family = AF_INET, - }; + struct udp_port_cfg udp_conf = {}; struct net *net = gtp->net; struct socket *sock; int err; + if (nla) { + err = gtp_sock_udp_config(&udp_conf, nla, family); + if (err < 0) + return ERR_PTR(err); + } else { + udp_conf.local_ip.s_addr = htonl(INADDR_ANY); + udp_conf.family = AF_INET; + } + if (type == UDP_ENCAP_GTP0) udp_conf.local_udp_port = htons(GTP0_PORT); else if (type == UDP_ENCAP_GTP1U) @@ -1007,16 +1431,17 @@ static struct sock *gtp_create_sock(int type, struct gtp_dev *gtp) return sock->sk; } -static int gtp_create_sockets(struct gtp_dev *gtp, struct nlattr *data[]) +static int gtp_create_sockets(struct gtp_dev *gtp, const struct nlattr *nla, + int family) { - struct sock *sk1u = NULL; - struct sock *sk0 = NULL; + struct sock *sk1u; + struct sock *sk0; - sk0 = gtp_create_sock(UDP_ENCAP_GTP0, gtp); + sk0 = gtp_create_sock(UDP_ENCAP_GTP0, gtp, nla, family); if (IS_ERR(sk0)) return PTR_ERR(sk0); - sk1u = gtp_create_sock(UDP_ENCAP_GTP1U, gtp); + sk1u = gtp_create_sock(UDP_ENCAP_GTP1U, gtp, nla, family); if (IS_ERR(sk1u)) { udp_tunnel_sock_release(sk0->sk_socket); return PTR_ERR(sk1u); @@ -1029,6 +1454,9 @@ static int gtp_create_sockets(struct gtp_dev *gtp, struct nlattr *data[]) return 0; } +#define GTP_TH_MAXLEN (sizeof(struct udphdr) + sizeof(struct gtp0_header)) +#define GTP_IPV6_MAXLEN (sizeof(struct ipv6hdr) + GTP_TH_MAXLEN) + static int gtp_newlink(struct net *src_net, struct net_device *dev, struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) @@ -1038,6 +1466,11 @@ static int gtp_newlink(struct net *src_net, struct net_device *dev, struct gtp_net *gn; int hashsize, err; +#if !IS_ENABLED(CONFIG_IPV6) + if (data[IFLA_GTP_LOCAL6]) + return -EAFNOSUPPORT; +#endif + gtp = netdev_priv(dev); if (!data[IFLA_GTP_PDP_HASHSIZE]) { @@ -1066,13 +1499,24 @@ static int gtp_newlink(struct net *src_net, struct net_device *dev, if (err < 0) return err; - if (data[IFLA_GTP_CREATE_SOCKETS]) - err = gtp_create_sockets(gtp, data); - else + if (data[IFLA_GTP_CREATE_SOCKETS]) { + if (data[IFLA_GTP_LOCAL6]) + err = gtp_create_sockets(gtp, data[IFLA_GTP_LOCAL6], AF_INET6); + else + err = gtp_create_sockets(gtp, data[IFLA_GTP_LOCAL], AF_INET); + } else { err = gtp_encap_enable(gtp, data); + } + if (err < 0) goto out_hashtable; + if ((gtp->sk0 && gtp->sk0->sk_family == AF_INET6) || + (gtp->sk1u && gtp->sk1u->sk_family == AF_INET6)) { + dev->mtu = ETH_DATA_LEN - GTP_IPV6_MAXLEN; + dev->needed_headroom = LL_MAX_HEADER + GTP_IPV6_MAXLEN; + } + err = register_netdevice(dev); if (err < 0) { netdev_dbg(dev, "failed to register new netdev %d\n", err); @@ -1117,6 +1561,8 @@ static const struct nla_policy gtp_policy[IFLA_GTP_MAX + 1] = { [IFLA_GTP_ROLE] = { .type = NLA_U32 }, [IFLA_GTP_CREATE_SOCKETS] = { .type = NLA_U8 }, [IFLA_GTP_RESTART_COUNT] = { .type = NLA_U8 }, + [IFLA_GTP_LOCAL] = { .type = NLA_U32 }, + [IFLA_GTP_LOCAL6] = { .len = sizeof(struct in6_addr) }, }; static int gtp_validate(struct nlattr *tb[], struct nlattr *data[], @@ -1216,6 +1662,12 @@ static struct sock *gtp_encap_enable_socket(int fd, int type, goto out_sock; } + if (sk->sk_family == AF_INET6 && + !sk->sk_ipv6only) { + sk = ERR_PTR(-EADDRNOTAVAIL); + goto out_sock; + } + lock_sock(sk); if (sk->sk_user_data) { sk = ERR_PTR(-EBUSY); @@ -1267,6 +1719,13 @@ static int gtp_encap_enable(struct gtp_dev *gtp, struct nlattr *data[]) gtp->sk0 = sk0; gtp->sk1u = sk1u; + if (sk0 && sk1u && + sk0->sk_family != sk1u->sk_family) { + gtp_encap_disable_sock(sk0); + gtp_encap_disable_sock(sk1u); + return -EINVAL; + } + return 0; } @@ -1296,14 +1755,9 @@ static struct gtp_dev *gtp_find_dev(struct net *src_net, struct nlattr *nla[]) return gtp; } -static void ipv4_pdp_fill(struct pdp_ctx *pctx, struct genl_info *info) +static void gtp_pdp_fill(struct pdp_ctx *pctx, struct genl_info *info) { pctx->gtp_version = nla_get_u32(info->attrs[GTPA_VERSION]); - pctx->af = AF_INET; - pctx->peer_addr_ip4.s_addr = - nla_get_be32(info->attrs[GTPA_PEER_ADDRESS]); - pctx->ms_addr_ip4.s_addr = - nla_get_be32(info->attrs[GTPA_MS_ADDRESS]); switch (pctx->gtp_version) { case GTP_V0: @@ -1323,29 +1777,102 @@ static void ipv4_pdp_fill(struct pdp_ctx *pctx, struct genl_info *info) } } +static void ip_pdp_peer_fill(struct pdp_ctx *pctx, struct genl_info *info) +{ + if (info->attrs[GTPA_PEER_ADDRESS]) { + pctx->peer.addr.s_addr = + nla_get_be32(info->attrs[GTPA_PEER_ADDRESS]); + } else if (info->attrs[GTPA_PEER_ADDR6]) { + pctx->peer.addr6 = nla_get_in6_addr(info->attrs[GTPA_PEER_ADDR6]); + } +} + +static void ipv4_pdp_fill(struct pdp_ctx *pctx, struct genl_info *info) +{ + ip_pdp_peer_fill(pctx, info); + pctx->ms.addr.s_addr = + nla_get_be32(info->attrs[GTPA_MS_ADDRESS]); + gtp_pdp_fill(pctx, info); +} + +static bool ipv6_pdp_fill(struct pdp_ctx *pctx, struct genl_info *info) +{ + ip_pdp_peer_fill(pctx, info); + pctx->ms.addr6 = nla_get_in6_addr(info->attrs[GTPA_MS_ADDR6]); + if (pctx->ms.addr6.s6_addr32[2] || + pctx->ms.addr6.s6_addr32[3]) + return false; + + gtp_pdp_fill(pctx, info); + + return true; +} + static struct pdp_ctx *gtp_pdp_add(struct gtp_dev *gtp, struct sock *sk, struct genl_info *info) { struct pdp_ctx *pctx, *pctx_tid = NULL; struct net_device *dev = gtp->dev; u32 hash_ms, hash_tid = 0; + struct in6_addr ms_addr6; unsigned int version; bool found = false; __be32 ms_addr; + int family; - ms_addr = nla_get_be32(info->attrs[GTPA_MS_ADDRESS]); - hash_ms = ipv4_hashfn(ms_addr) % gtp->hash_size; version = nla_get_u32(info->attrs[GTPA_VERSION]); - pctx = ipv4_pdp_find(gtp, ms_addr); + if (info->attrs[GTPA_FAMILY]) + family = nla_get_u8(info->attrs[GTPA_FAMILY]); + else + family = AF_INET; + +#if !IS_ENABLED(CONFIG_IPV6) + if (family == AF_INET6) + return ERR_PTR(-EAFNOSUPPORT); +#endif + if (!info->attrs[GTPA_PEER_ADDRESS] && + !info->attrs[GTPA_PEER_ADDR6]) + return ERR_PTR(-EINVAL); + + if ((info->attrs[GTPA_PEER_ADDRESS] && + sk->sk_family == AF_INET6) || + (info->attrs[GTPA_PEER_ADDR6] && + sk->sk_family == AF_INET)) + return ERR_PTR(-EAFNOSUPPORT); + + switch (family) { + case AF_INET: + if (!info->attrs[GTPA_MS_ADDRESS] || + info->attrs[GTPA_MS_ADDR6]) + return ERR_PTR(-EINVAL); + + ms_addr = nla_get_be32(info->attrs[GTPA_MS_ADDRESS]); + hash_ms = ipv4_hashfn(ms_addr) % gtp->hash_size; + pctx = ipv4_pdp_find(gtp, ms_addr); + break; + case AF_INET6: + if (!info->attrs[GTPA_MS_ADDR6] || + info->attrs[GTPA_MS_ADDRESS]) + return ERR_PTR(-EINVAL); + + ms_addr6 = nla_get_in6_addr(info->attrs[GTPA_MS_ADDR6]); + hash_ms = ipv6_hashfn(&ms_addr6) % gtp->hash_size; + pctx = ipv6_pdp_find(gtp, &ms_addr6); + break; + default: + return ERR_PTR(-EAFNOSUPPORT); + } if (pctx) found = true; if (version == GTP_V0) pctx_tid = gtp0_pdp_find(gtp, - nla_get_u64(info->attrs[GTPA_TID])); + nla_get_u64(info->attrs[GTPA_TID]), + family); else if (version == GTP_V1) pctx_tid = gtp1_pdp_find(gtp, - nla_get_u32(info->attrs[GTPA_I_TEI])); + nla_get_u32(info->attrs[GTPA_I_TEI]), + family); if (pctx_tid) found = true; @@ -1360,7 +1887,15 @@ static struct pdp_ctx *gtp_pdp_add(struct gtp_dev *gtp, struct sock *sk, if (!pctx) pctx = pctx_tid; - ipv4_pdp_fill(pctx, info); + switch (pctx->af) { + case AF_INET: + ipv4_pdp_fill(pctx, info); + break; + case AF_INET6: + if (!ipv6_pdp_fill(pctx, info)) + return ERR_PTR(-EADDRNOTAVAIL); + break; + } if (pctx->gtp_version == GTP_V0) netdev_dbg(dev, "GTPv0-U: update tunnel id = %llx (pdp %p)\n", @@ -1380,7 +1915,32 @@ static struct pdp_ctx *gtp_pdp_add(struct gtp_dev *gtp, struct sock *sk, sock_hold(sk); pctx->sk = sk; pctx->dev = gtp->dev; - ipv4_pdp_fill(pctx, info); + pctx->af = family; + + switch (pctx->af) { + case AF_INET: + if (!info->attrs[GTPA_MS_ADDRESS]) { + sock_put(sk); + kfree(pctx); + return ERR_PTR(-EINVAL); + } + + ipv4_pdp_fill(pctx, info); + break; + case AF_INET6: + if (!info->attrs[GTPA_MS_ADDR6]) { + sock_put(sk); + kfree(pctx); + return ERR_PTR(-EINVAL); + } + + if (!ipv6_pdp_fill(pctx, info)) { + sock_put(sk); + kfree(pctx); + return ERR_PTR(-EADDRNOTAVAIL); + } + break; + } atomic_set(&pctx->tx_seq, 0); switch (pctx->gtp_version) { @@ -1403,13 +1963,13 @@ static struct pdp_ctx *gtp_pdp_add(struct gtp_dev *gtp, struct sock *sk, switch (pctx->gtp_version) { case GTP_V0: netdev_dbg(dev, "GTPv0-U: new PDP ctx id=%llx ssgn=%pI4 ms=%pI4 (pdp=%p)\n", - pctx->u.v0.tid, &pctx->peer_addr_ip4, - &pctx->ms_addr_ip4, pctx); + pctx->u.v0.tid, &pctx->peer.addr, + &pctx->ms.addr, pctx); break; case GTP_V1: netdev_dbg(dev, "GTPv1-U: new PDP ctx id=%x/%x ssgn=%pI4 ms=%pI4 (pdp=%p)\n", pctx->u.v1.i_tei, pctx->u.v1.o_tei, - &pctx->peer_addr_ip4, &pctx->ms_addr_ip4, pctx); + &pctx->peer.addr, &pctx->ms.addr, pctx); break; } @@ -1442,9 +2002,7 @@ static int gtp_genl_new_pdp(struct sk_buff *skb, struct genl_info *info) int err; if (!info->attrs[GTPA_VERSION] || - !info->attrs[GTPA_LINK] || - !info->attrs[GTPA_PEER_ADDRESS] || - !info->attrs[GTPA_MS_ADDRESS]) + !info->attrs[GTPA_LINK]) return -EINVAL; version = nla_get_u32(info->attrs[GTPA_VERSION]); @@ -1502,6 +2060,12 @@ static struct pdp_ctx *gtp_find_pdp_by_link(struct net *net, struct nlattr *nla[]) { struct gtp_dev *gtp; + int family; + + if (nla[GTPA_FAMILY]) + family = nla_get_u8(nla[GTPA_FAMILY]); + else + family = AF_INET; gtp = gtp_find_dev(net, nla); if (!gtp) @@ -1510,14 +2074,31 @@ static struct pdp_ctx *gtp_find_pdp_by_link(struct net *net, if (nla[GTPA_MS_ADDRESS]) { __be32 ip = nla_get_be32(nla[GTPA_MS_ADDRESS]); + if (family != AF_INET) + return ERR_PTR(-EINVAL); + return ipv4_pdp_find(gtp, ip); + } else if (nla[GTPA_MS_ADDR6]) { + struct in6_addr addr = nla_get_in6_addr(nla[GTPA_MS_ADDR6]); + + if (family != AF_INET6) + return ERR_PTR(-EINVAL); + + if (addr.s6_addr32[2] || + addr.s6_addr32[3]) + return ERR_PTR(-EADDRNOTAVAIL); + + return ipv6_pdp_find(gtp, &addr); } else if (nla[GTPA_VERSION]) { u32 gtp_version = nla_get_u32(nla[GTPA_VERSION]); - if (gtp_version == GTP_V0 && nla[GTPA_TID]) - return gtp0_pdp_find(gtp, nla_get_u64(nla[GTPA_TID])); - else if (gtp_version == GTP_V1 && nla[GTPA_I_TEI]) - return gtp1_pdp_find(gtp, nla_get_u32(nla[GTPA_I_TEI])); + if (gtp_version == GTP_V0 && nla[GTPA_TID]) { + return gtp0_pdp_find(gtp, nla_get_u64(nla[GTPA_TID]), + family); + } else if (gtp_version == GTP_V1 && nla[GTPA_I_TEI]) { + return gtp1_pdp_find(gtp, nla_get_u32(nla[GTPA_I_TEI]), + family); + } } return ERR_PTR(-EINVAL); @@ -1581,10 +2162,31 @@ static int gtp_genl_fill_info(struct sk_buff *skb, u32 snd_portid, u32 snd_seq, if (nla_put_u32(skb, GTPA_VERSION, pctx->gtp_version) || nla_put_u32(skb, GTPA_LINK, pctx->dev->ifindex) || - nla_put_be32(skb, GTPA_PEER_ADDRESS, pctx->peer_addr_ip4.s_addr) || - nla_put_be32(skb, GTPA_MS_ADDRESS, pctx->ms_addr_ip4.s_addr)) + nla_put_u8(skb, GTPA_FAMILY, pctx->af)) goto nla_put_failure; + switch (pctx->af) { + case AF_INET: + if (nla_put_be32(skb, GTPA_MS_ADDRESS, pctx->ms.addr.s_addr)) + goto nla_put_failure; + break; + case AF_INET6: + if (nla_put_in6_addr(skb, GTPA_MS_ADDR6, &pctx->ms.addr6)) + goto nla_put_failure; + break; + } + + switch (pctx->sk->sk_family) { + case AF_INET: + if (nla_put_be32(skb, GTPA_PEER_ADDRESS, pctx->peer.addr.s_addr)) + goto nla_put_failure; + break; + case AF_INET6: + if (nla_put_in6_addr(skb, GTPA_PEER_ADDR6, &pctx->peer.addr6)) + goto nla_put_failure; + break; + } + switch (pctx->gtp_version) { case GTP_V0: if (nla_put_u64_64bit(skb, GTPA_TID, pctx->u.v0.tid, GTPA_PAD) || @@ -1811,6 +2413,9 @@ static const struct nla_policy gtp_genl_policy[GTPA_MAX + 1] = { [GTPA_NET_NS_FD] = { .type = NLA_U32, }, [GTPA_I_TEI] = { .type = NLA_U32, }, [GTPA_O_TEI] = { .type = NLA_U32, }, + [GTPA_PEER_ADDR6] = { .len = sizeof(struct in6_addr), }, + [GTPA_MS_ADDR6] = { .len = sizeof(struct in6_addr), }, + [GTPA_FAMILY] = { .type = NLA_U8, }, }; static const struct genl_small_ops gtp_genl_ops[] = { diff --git a/include/net/gtp.h b/include/net/gtp.h index 2a503f035d188..c0253c8702d0b 100644 --- a/include/net/gtp.h +++ b/include/net/gtp.h @@ -78,4 +78,9 @@ static inline bool netif_is_gtp(const struct net_device *dev) #define GTP1_F_EXTHDR 0x04 #define GTP1_F_MASK 0x07 +struct gtp_ext_hdr { + __u8 len; + __u8 data[]; +}; + #endif diff --git a/include/uapi/linux/gtp.h b/include/uapi/linux/gtp.h index 3dcdb9e33cba2..40f5388d6de07 100644 --- a/include/uapi/linux/gtp.h +++ b/include/uapi/linux/gtp.h @@ -31,6 +31,9 @@ enum gtp_attrs { GTPA_I_TEI, /* for GTPv1 only */ GTPA_O_TEI, /* for GTPv1 only */ GTPA_PAD, + GTPA_PEER_ADDR6, + GTPA_MS_ADDR6, + GTPA_FAMILY, __GTPA_MAX, }; #define GTPA_MAX (__GTPA_MAX - 1) diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index e9f10860ec8ec..6dc258993b177 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -1466,6 +1466,8 @@ enum { IFLA_GTP_ROLE, IFLA_GTP_CREATE_SOCKETS, IFLA_GTP_RESTART_COUNT, + IFLA_GTP_LOCAL, + IFLA_GTP_LOCAL6, __IFLA_GTP_MAX, }; #define IFLA_GTP_MAX (__IFLA_GTP_MAX - 1)