osmocom-net-gprs June 2025

osmocom-net-gprs@lists.osmocom.org

7 participants
6 discussions

RFC: unit tests for kernel GTP module
by Harald Welte 31 Dec '25

31 Dec '25

Dear GTP-interested folks, I would love to somehow get towards some degree of unit testing (or even "continuous integration") for teh kernel GTP code. We currently have the original code in the kernel, we had some recent small fixes and now are getting more patches into place. With relatively few active users out there (and probably none of them in production yet), it's particularly easy to introduce regressions while working on the code. Also, having tested new code even against a test set with limited covrage could help to get more confidence in new patches and thus get them merged sooner. Using tools like sgsnemu of OpenGGSN and the command line tools included in libgtpnl, it should be possibel to cook up some scripts for testing. Even the most basic set of tests would be an improvement over what we have now. One could also think about pcap replay to test with hand-crafted or real-world packets from other GTP implementations. As much as I'd like to put something like this into place myself, I don't think I will be able to work much on this in the near future. The GTP module at this point is a pure hobby and contrary to some years ago while I started it, I don't have any contract work in the GTP area at this point, so other projects currently unfortunately get more attention. So in case somebody among the GTP-interested parties (Travelping, OAI, ...) would want to do something in terms of testing, I'd be more than happy if somebody would step ahead. Otherwise it's all just vapourware going to end up on my ever-growing TODO list :/ Also, if netdev folks have some ideas/pointers about possible frameworks/tools for this kind of testing [it must exist for at least some other kernel networking code?]: Please let me know. I'd be interested to have a look if there's something that can be used as a basis (starting network namespaces, sending/transmitting packets, test case startup/teardown, ...) My "old school" approach would have been to start one or multiple user-mode-linux kernels (those that are to be tested), and then have scripts that set up a gtp socket and gtp tunnels via the libgtp command line tools, and throw packets at that. But I'm sure there must be quite powerful frameworks for that kind of testing in the 21st century? How do other tunneling implementations handle this? Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

4 5

[PATCH net-next v3 06/15] net: ipv6: Add a flags argument to ip6tunnel_xmit(), udp_tunnel6_xmit_skb()
by Petr Machata 16 Jun '25

16 Jun '25

ip6tunnel_xmit() erases the contents of the SKB control block. In order to be able to set particular IP6CB flags on the SKB, add a corresponding parameter, and propagate it to udp_tunnel6_xmit_skb() as well. In one of the following patches, VXLAN driver will use this facility to mark packets as subject to IPv6 multicast routing. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> --- Notes: CC: Pablo Neira Ayuso <pablo(a)netfilter.org> CC: osmocom-net-gprs(a)lists.osmocom.org CC: Andrew Lunn <andrew+netdev(a)lunn.ch> CC: Antonio Quartulli <antonio(a)openvpn.net> CC: "Jason A. Donenfeld" <Jason(a)zx2c4.com> CC: wireguard(a)lists.zx2c4.com CC: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> CC: linux-sctp(a)vger.kernel.org CC: Jon Maloy <jmaloy(a)redhat.com> CC: tipc-discussion(a)lists.sourceforge.net drivers/net/bareudp.c | 3 ++- drivers/net/geneve.c | 3 ++- drivers/net/gtp.c | 2 +- drivers/net/ovpn/udp.c | 2 +- drivers/net/vxlan/vxlan_core.c | 3 ++- drivers/net/wireguard/socket.c | 2 +- include/net/ip6_tunnel.h | 3 ++- include/net/udp_tunnel.h | 3 ++- net/ipv6/ip6_tunnel.c | 2 +- net/ipv6/ip6_udp_tunnel.c | 5 +++-- net/sctp/ipv6.c | 2 +- net/tipc/udp_media.c | 2 +- 12 files changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c index 5e613080d3f8..0df3208783ad 100644 --- a/drivers/net/bareudp.c +++ b/drivers/net/bareudp.c @@ -431,7 +431,8 @@ static int bareudp6_xmit_skb(struct sk_buff *skb, struct net_device *dev, &saddr, &daddr, prio, ttl, info->key.label, sport, bareudp->port, !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + info->key.tun_flags), + 0); return 0; free_dst: diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index c668e8b00ed2..f6bd155aae7f 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -1014,7 +1014,8 @@ static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, &saddr, &key->u.ipv6.dst, prio, ttl, info->key.label, sport, geneve->cfg.info.key.tp_dst, !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + info->key.tun_flags), + 0); return 0; } #endif diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index 14584793fe4e..4b668ebaa0f7 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -1316,7 +1316,7 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) ip6_dst_hoplimit(&pktinfo.rt->dst), 0, pktinfo.gtph_port, pktinfo.gtph_port, - false); + false, 0); #else goto tx_err; #endif diff --git a/drivers/net/ovpn/udp.c b/drivers/net/ovpn/udp.c index d866e6bfda70..254cc94c4617 100644 --- a/drivers/net/ovpn/udp.c +++ b/drivers/net/ovpn/udp.c @@ -274,7 +274,7 @@ static int ovpn_udp6_output(struct ovpn_peer *peer, struct ovpn_bind *bind, skb->ignore_df = 1; udp_tunnel6_xmit_skb(dst, sk, skb, skb->dev, &fl.saddr, &fl.daddr, 0, ip6_dst_hoplimit(dst), 0, fl.fl6_sport, - fl.fl6_dport, udp_get_no_check6_tx(sk)); + fl.fl6_dport, udp_get_no_check6_tx(sk), 0); ret = 0; err: local_bh_enable(); diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 1cc18acd242d..b22f9866be8e 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -2586,7 +2586,8 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, &saddr, &pkey->u.ipv6.dst, tos, ttl, - pkey->label, src_port, dst_port, !udp_sum); + pkey->label, src_port, dst_port, !udp_sum, + 0); #endif } vxlan_vnifilter_count(vxlan, vni, NULL, VXLAN_VNI_STATS_TX, pkt_len); diff --git a/drivers/net/wireguard/socket.c b/drivers/net/wireguard/socket.c index 88e685667bc0..253488f8c00f 100644 --- a/drivers/net/wireguard/socket.c +++ b/drivers/net/wireguard/socket.c @@ -151,7 +151,7 @@ static int send6(struct wg_device *wg, struct sk_buff *skb, skb->ignore_df = 1; udp_tunnel6_xmit_skb(dst, sock, skb, skb->dev, &fl.saddr, &fl.daddr, ds, ip6_dst_hoplimit(dst), 0, fl.fl6_sport, - fl.fl6_dport, false); + fl.fl6_dport, false, 0); goto out; err: diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h index 399592405c72..dd163495f353 100644 --- a/include/net/ip6_tunnel.h +++ b/include/net/ip6_tunnel.h @@ -152,11 +152,12 @@ int ip6_tnl_get_iflink(const struct net_device *dev); int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu); static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, - struct net_device *dev) + struct net_device *dev, u16 ip6cb_flags) { int pkt_len, err; memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); + IP6CB(skb)->flags = ip6cb_flags; pkt_len = skb->len - skb_inner_network_offset(skb); err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb); diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h index 0b01f6ade20d..e3c70b579095 100644 --- a/include/net/udp_tunnel.h +++ b/include/net/udp_tunnel.h @@ -158,7 +158,8 @@ void udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, const struct in6_addr *saddr, const struct in6_addr *daddr, __u8 prio, __u8 ttl, __be32 label, - __be16 src_port, __be16 dst_port, bool nocheck); + __be16 src_port, __be16 dst_port, bool nocheck, + u16 ip6cb_flags); void udp_tunnel_sock_release(struct socket *sock); diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 894d3158a6f0..a885bb5c98ea 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1278,7 +1278,7 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, ipv6h->nexthdr = proto; ipv6h->saddr = fl6->saddr; ipv6h->daddr = fl6->daddr; - ip6tunnel_xmit(NULL, skb, dev); + ip6tunnel_xmit(NULL, skb, dev, 0); return 0; tx_err_link_failure: DEV_STATS_INC(dev, tx_carrier_errors); diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c index 21681718b7bb..8ebe17a6058a 100644 --- a/net/ipv6/ip6_udp_tunnel.c +++ b/net/ipv6/ip6_udp_tunnel.c @@ -80,7 +80,8 @@ void udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, const struct in6_addr *saddr, const struct in6_addr *daddr, __u8 prio, __u8 ttl, __be32 label, - __be16 src_port, __be16 dst_port, bool nocheck) + __be16 src_port, __be16 dst_port, bool nocheck, + u16 ip6cb_flags) { struct udphdr *uh; struct ipv6hdr *ip6h; @@ -108,7 +109,7 @@ void udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, ip6h->daddr = *daddr; ip6h->saddr = *saddr; - ip6tunnel_xmit(sk, skb, dev); + ip6tunnel_xmit(sk, skb, dev, ip6cb_flags); } EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb); diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index d1ecf7454827..3336dcfb4515 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -263,7 +263,7 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *t) udp_tunnel6_xmit_skb(dst, sk, skb, NULL, &fl6->saddr, &fl6->daddr, tclass, ip6_dst_hoplimit(dst), label, - sctp_sk(sk)->udp_port, t->encap_port, false); + sctp_sk(sk)->udp_port, t->encap_port, false, 0); return 0; } diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index 414713fcd8c5..a024fcc8c0cb 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -219,7 +219,7 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, ttl = ip6_dst_hoplimit(ndst); udp_tunnel6_xmit_skb(ndst, ub->ubsock->sk, skb, NULL, &src->ipv6, &dst->ipv6, 0, ttl, 0, - src->port, dst->port, false); + src->port, dst->port, false, 0); #endif } local_bh_enable(); -- 2.49.0

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[PATCH net-next v3 01/15] net: ipv4: Add a flags argument to iptunnel_xmit(), udp_tunnel_xmit_skb()
by Petr Machata 16 Jun '25

16 Jun '25

iptunnel_xmit() erases the contents of the SKB control block. In order to be able to set particular IPCB flags on the SKB, add a corresponding parameter, and propagate it to udp_tunnel_xmit_skb() as well. In one of the following patches, VXLAN driver will use this facility to mark packets as subject to IP multicast routing. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> Acked-by: Antonio Quartulli <antonio(a)openvpn.net> --- Notes: CC: Pablo Neira Ayuso <pablo(a)netfilter.org> CC: osmocom-net-gprs(a)lists.osmocom.org CC: Andrew Lunn <andrew+netdev(a)lunn.ch> CC: Taehee Yoo <ap420073(a)gmail.com> CC: Antonio Quartulli <antonio(a)openvpn.net> CC: "Jason A. Donenfeld" <Jason(a)zx2c4.com> CC: wireguard(a)lists.zx2c4.com CC: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> CC: linux-sctp(a)vger.kernel.org CC: Jon Maloy <jmaloy(a)redhat.com> CC: tipc-discussion(a)lists.sourceforge.net drivers/net/amt.c | 9 ++++++--- drivers/net/bareudp.c | 4 ++-- drivers/net/geneve.c | 4 ++-- drivers/net/gtp.c | 10 ++++++---- drivers/net/ovpn/udp.c | 2 +- drivers/net/vxlan/vxlan_core.c | 2 +- drivers/net/wireguard/socket.c | 2 +- include/net/ip_tunnels.h | 2 +- include/net/udp_tunnel.h | 2 +- net/ipv4/ip_tunnel.c | 4 ++-- net/ipv4/ip_tunnel_core.c | 4 +++- net/ipv4/udp_tunnel_core.c | 5 +++-- net/ipv6/sit.c | 2 +- net/sctp/protocol.c | 3 ++- net/tipc/udp_media.c | 2 +- 15 files changed, 33 insertions(+), 24 deletions(-) diff --git a/drivers/net/amt.c b/drivers/net/amt.c index fb130fde68c0..ed86537b2f61 100644 --- a/drivers/net/amt.c +++ b/drivers/net/amt.c @@ -1046,7 +1046,8 @@ static bool amt_send_membership_update(struct amt_dev *amt, amt->gw_port, amt->relay_port, false, - false); + false, + 0); amt_update_gw_status(amt, AMT_STATUS_SENT_UPDATE, true); return false; } @@ -1103,7 +1104,8 @@ static void amt_send_multicast_data(struct amt_dev *amt, amt->relay_port, tunnel->source_port, false, - false); + false, + 0); } static bool amt_send_membership_query(struct amt_dev *amt, @@ -1161,7 +1163,8 @@ static bool amt_send_membership_query(struct amt_dev *amt, amt->relay_port, tunnel->source_port, false, - false); + false, + 0); amt_update_relay_status(tunnel, AMT_STATUS_SENT_QUERY, true); return false; } diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c index a9dffdcac805..5e613080d3f8 100644 --- a/drivers/net/bareudp.c +++ b/drivers/net/bareudp.c @@ -362,8 +362,8 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, sock->sk, skb, saddr, info->key.u.ipv4.dst, tos, ttl, df, sport, bareudp->port, !net_eq(bareudp->net, dev_net(bareudp->dev)), - !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + !test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags), + 0); return 0; free_dst: diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index ffc15a432689..c668e8b00ed2 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -921,8 +921,8 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, saddr, info->key.u.ipv4.dst, tos, ttl, df, sport, geneve->cfg.info.key.tp_dst, !net_eq(geneve->net, dev_net(geneve->dev)), - !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + !test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags), + 0); return 0; } diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index d4dec741c7f4..14584793fe4e 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -446,7 +446,8 @@ static int gtp0_send_echo_resp_ip(struct gtp_dev *gtp, struct sk_buff *skb) htons(GTP0_PORT), htons(GTP0_PORT), !net_eq(sock_net(gtp->sk1u), dev_net(gtp->dev)), - false); + false, + 0); return 0; } @@ -704,7 +705,8 @@ static int gtp1u_send_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) htons(GTP1U_PORT), htons(GTP1U_PORT), !net_eq(sock_net(gtp->sk1u), dev_net(gtp->dev)), - false); + false, + 0); return 0; } @@ -1304,7 +1306,7 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) pktinfo.gtph_port, pktinfo.gtph_port, !net_eq(sock_net(pktinfo.pctx->sk), dev_net(dev)), - false); + false, 0); break; case AF_INET6: #if IS_ENABLED(CONFIG_IPV6) @@ -2405,7 +2407,7 @@ static int gtp_genl_send_echo_req(struct sk_buff *skb, struct genl_info *info) port, port, !net_eq(sock_net(sk), dev_net(gtp->dev)), - false); + false, 0); return 0; } diff --git a/drivers/net/ovpn/udp.c b/drivers/net/ovpn/udp.c index bff00946eae2..d866e6bfda70 100644 --- a/drivers/net/ovpn/udp.c +++ b/drivers/net/ovpn/udp.c @@ -199,7 +199,7 @@ static int ovpn_udp4_output(struct ovpn_peer *peer, struct ovpn_bind *bind, transmit: udp_tunnel_xmit_skb(rt, sk, skb, fl.saddr, fl.daddr, 0, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, - fl.fl4_dport, false, sk->sk_no_check_tx); + fl.fl4_dport, false, sk->sk_no_check_tx, 0); ret = 0; err: local_bh_enable(); diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 97792de896b7..1cc18acd242d 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -2522,7 +2522,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, saddr, pkey->u.ipv4.dst, tos, ttl, df, - src_port, dst_port, xnet, !udp_sum); + src_port, dst_port, xnet, !udp_sum, 0); #if IS_ENABLED(CONFIG_IPV6) } else { struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); diff --git a/drivers/net/wireguard/socket.c b/drivers/net/wireguard/socket.c index 0414d7a6ce74..88e685667bc0 100644 --- a/drivers/net/wireguard/socket.c +++ b/drivers/net/wireguard/socket.c @@ -84,7 +84,7 @@ static int send4(struct wg_device *wg, struct sk_buff *skb, skb->ignore_df = 1; udp_tunnel_xmit_skb(rt, sock, skb, fl.saddr, fl.daddr, ds, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, - fl.fl4_dport, false, false); + fl.fl4_dport, false, false, 0); goto out; err: diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index 0c3d571a04a1..8cf1380f3656 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -603,7 +603,7 @@ static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, u8 proto, - u8 tos, u8 ttl, __be16 df, bool xnet); + u8 tos, u8 ttl, __be16 df, bool xnet, u16 ipcb_flags); struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, gfp_t flags); int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst, diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h index 2df3b8344eb5..28102c8fd8a8 100644 --- a/include/net/udp_tunnel.h +++ b/include/net/udp_tunnel.h @@ -150,7 +150,7 @@ static inline void udp_tunnel_drop_rx_info(struct net_device *dev) void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, - bool xnet, bool nocheck); + bool xnet, bool nocheck, u16 ipcb_flags); int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb, diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 678b8f96e3e9..aaeb5d16f0c9 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -668,7 +668,7 @@ void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_adj_headroom(dev, headroom); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, proto, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return; tx_error: DEV_STATS_INC(dev, tx_errors); @@ -857,7 +857,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_adj_headroom(dev, max_headroom); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return; #if IS_ENABLED(CONFIG_IPV6) diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index f65d2f727381..cc9915543637 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -49,7 +49,8 @@ EXPORT_SYMBOL(ip6tun_encaps); void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, __u8 proto, - __u8 tos, __u8 ttl, __be16 df, bool xnet) + __u8 tos, __u8 ttl, __be16 df, bool xnet, + u16 ipcb_flags) { int pkt_len = skb->len - skb_inner_network_offset(skb); struct net *net = dev_net(rt->dst.dev); @@ -62,6 +63,7 @@ void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, skb_clear_hash_if_not_l4(skb); skb_dst_set(skb, &rt->dst); memset(IPCB(skb), 0, sizeof(*IPCB(skb))); + IPCB(skb)->flags = ipcb_flags; /* Push down and install the IP header. */ skb_push(skb, sizeof(struct iphdr)); diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c index 2326548997d3..9efd62505916 100644 --- a/net/ipv4/udp_tunnel_core.c +++ b/net/ipv4/udp_tunnel_core.c @@ -169,7 +169,7 @@ EXPORT_SYMBOL_GPL(udp_tunnel_notify_del_rx_port); void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, - bool xnet, bool nocheck) + bool xnet, bool nocheck, u16 ipcb_flags) { struct udphdr *uh; @@ -185,7 +185,8 @@ void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb udp_set_csum(nocheck, skb, src, dst, skb->len); - iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet); + iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet, + ipcb_flags); } EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb); diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index a72dbca9e8fc..12496ba1b7d4 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1035,7 +1035,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, skb_set_inner_ipproto(skb, IPPROTO_IPV6); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return NETDEV_TX_OK; tx_error_icmp: diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index f402f90eb6b6..a5ccada55f2b 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1103,7 +1103,8 @@ static inline int sctp_v4_xmit(struct sk_buff *skb, struct sctp_transport *t) skb_set_inner_ipproto(skb, IPPROTO_SCTP); udp_tunnel_xmit_skb(dst_rtable(dst), sk, skb, fl4->saddr, fl4->daddr, dscp, ip4_dst_hoplimit(dst), df, - sctp_sk(sk)->udp_port, t->encap_port, false, false); + sctp_sk(sk)->udp_port, t->encap_port, false, false, + 0); return 0; } diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index 108a4cc2e001..87e8c1e6d550 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -197,7 +197,7 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, ttl = ip4_dst_hoplimit(&rt->dst); udp_tunnel_xmit_skb(rt, ub->ubsock->sk, skb, src->ipv4.s_addr, dst->ipv4.s_addr, 0, ttl, 0, src->port, - dst->port, false, true); + dst->port, false, true, 0); #if IS_ENABLED(CONFIG_IPV6) } else { if (!ndst) { -- 2.49.0

1 0

Error in PCU Loopback
by M. Suhendy Martondi Nasution 14 Jun '25

14 Jun '25

Hello Mr/Mrs, I am Suhendy, I am master degree student from university of indonesia I have project to make GPRS private network using OSMOCOM I have trouble in osmo-pcu which my log said like this DLNS ERROR GPRS-NS2-VC(NSE01234-NSVC-UDP-0_0_0_0:23000-127_0_0_1:23000){BLOCKED}: Event RX-RESET_ACK not permitted (gprs_ns2_vc_fsm.c:937) my osmo pcu make loop communication so my osmo-pcu and osmo-sgsn cant connect each other. this is my osmo-pcu.cfg log stderr logging color 1 logging print category-hex 0 logging print category 1 logging timestamp 0 logging print file basename last logging print level 1 ns timer tns-block 10 timer tns-block-retries 3 timer tns-reset 10 timer tns-reset-retries 3 timer tns-test 60 timer tns-alive 5 timer tns-alive-retries 10 pcu flow-control-interval 10 cs 2 alloc-algorithm dynamic alpha 0 gamma 0 Please help me to solve this problem. Thank you

3 2

[PATCH net-next v2 01/14] net: ipv4: Add a flags argument to iptunnel_xmit(), udp_tunnel_xmit_skb()
by Petr Machata 13 Jun '25

13 Jun '25

iptunnel_xmit() erases the contents of the SKB control block. In order to be able to set particular IPCB flags on the SKB, add a corresponding parameter, and propagate it to udp_tunnel_xmit_skb() as well. In one of the following patches, VXLAN driver will use this facility to mark packets as subject to IP multicast routing. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor(a)blackwall.org> Acked-by: Antonio Quartulli <antonio(a)openvpn.net> --- Notes: CC: Pablo Neira Ayuso <pablo(a)netfilter.org> CC: osmocom-net-gprs(a)lists.osmocom.org CC: Andrew Lunn <andrew+netdev(a)lunn.ch> CC: Taehee Yoo <ap420073(a)gmail.com> CC: Antonio Quartulli <antonio(a)openvpn.net> CC: "Jason A. Donenfeld" <Jason(a)zx2c4.com> CC: wireguard(a)lists.zx2c4.com CC: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> CC: linux-sctp(a)vger.kernel.org CC: Jon Maloy <jmaloy(a)redhat.com> CC: tipc-discussion(a)lists.sourceforge.net drivers/net/amt.c | 9 ++++++--- drivers/net/bareudp.c | 4 ++-- drivers/net/geneve.c | 4 ++-- drivers/net/gtp.c | 10 ++++++---- drivers/net/ovpn/udp.c | 2 +- drivers/net/vxlan/vxlan_core.c | 2 +- drivers/net/wireguard/socket.c | 2 +- include/net/ip_tunnels.h | 2 +- include/net/udp_tunnel.h | 2 +- net/ipv4/ip_tunnel.c | 4 ++-- net/ipv4/ip_tunnel_core.c | 4 +++- net/ipv4/udp_tunnel_core.c | 5 +++-- net/ipv6/sit.c | 2 +- net/sctp/protocol.c | 3 ++- net/tipc/udp_media.c | 2 +- 15 files changed, 33 insertions(+), 24 deletions(-) diff --git a/drivers/net/amt.c b/drivers/net/amt.c index 734a0b3242a9..d0f719531499 100644 --- a/drivers/net/amt.c +++ b/drivers/net/amt.c @@ -1046,7 +1046,8 @@ static bool amt_send_membership_update(struct amt_dev *amt, amt->gw_port, amt->relay_port, false, - false); + false, + 0); amt_update_gw_status(amt, AMT_STATUS_SENT_UPDATE, true); return false; } @@ -1103,7 +1104,8 @@ static void amt_send_multicast_data(struct amt_dev *amt, amt->relay_port, tunnel->source_port, false, - false); + false, + 0); } static bool amt_send_membership_query(struct amt_dev *amt, @@ -1161,7 +1163,8 @@ static bool amt_send_membership_query(struct amt_dev *amt, amt->relay_port, tunnel->source_port, false, - false); + false, + 0); amt_update_relay_status(tunnel, AMT_STATUS_SENT_QUERY, true); return false; } diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c index a9dffdcac805..5e613080d3f8 100644 --- a/drivers/net/bareudp.c +++ b/drivers/net/bareudp.c @@ -362,8 +362,8 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, sock->sk, skb, saddr, info->key.u.ipv4.dst, tos, ttl, df, sport, bareudp->port, !net_eq(bareudp->net, dev_net(bareudp->dev)), - !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + !test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags), + 0); return 0; free_dst: diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index ffc15a432689..c668e8b00ed2 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -921,8 +921,8 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, saddr, info->key.u.ipv4.dst, tos, ttl, df, sport, geneve->cfg.info.key.tp_dst, !net_eq(geneve->net, dev_net(geneve->dev)), - !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + !test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags), + 0); return 0; } diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index d4dec741c7f4..14584793fe4e 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -446,7 +446,8 @@ static int gtp0_send_echo_resp_ip(struct gtp_dev *gtp, struct sk_buff *skb) htons(GTP0_PORT), htons(GTP0_PORT), !net_eq(sock_net(gtp->sk1u), dev_net(gtp->dev)), - false); + false, + 0); return 0; } @@ -704,7 +705,8 @@ static int gtp1u_send_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) htons(GTP1U_PORT), htons(GTP1U_PORT), !net_eq(sock_net(gtp->sk1u), dev_net(gtp->dev)), - false); + false, + 0); return 0; } @@ -1304,7 +1306,7 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) pktinfo.gtph_port, pktinfo.gtph_port, !net_eq(sock_net(pktinfo.pctx->sk), dev_net(dev)), - false); + false, 0); break; case AF_INET6: #if IS_ENABLED(CONFIG_IPV6) @@ -2405,7 +2407,7 @@ static int gtp_genl_send_echo_req(struct sk_buff *skb, struct genl_info *info) port, port, !net_eq(sock_net(sk), dev_net(gtp->dev)), - false); + false, 0); return 0; } diff --git a/drivers/net/ovpn/udp.c b/drivers/net/ovpn/udp.c index bff00946eae2..d866e6bfda70 100644 --- a/drivers/net/ovpn/udp.c +++ b/drivers/net/ovpn/udp.c @@ -199,7 +199,7 @@ static int ovpn_udp4_output(struct ovpn_peer *peer, struct ovpn_bind *bind, transmit: udp_tunnel_xmit_skb(rt, sk, skb, fl.saddr, fl.daddr, 0, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, - fl.fl4_dport, false, sk->sk_no_check_tx); + fl.fl4_dport, false, sk->sk_no_check_tx, 0); ret = 0; err: local_bh_enable(); diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index a56d7239b127..d7a5d8873a1b 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -2522,7 +2522,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, saddr, pkey->u.ipv4.dst, tos, ttl, df, - src_port, dst_port, xnet, !udp_sum); + src_port, dst_port, xnet, !udp_sum, 0); #if IS_ENABLED(CONFIG_IPV6) } else { struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); diff --git a/drivers/net/wireguard/socket.c b/drivers/net/wireguard/socket.c index 0414d7a6ce74..88e685667bc0 100644 --- a/drivers/net/wireguard/socket.c +++ b/drivers/net/wireguard/socket.c @@ -84,7 +84,7 @@ static int send4(struct wg_device *wg, struct sk_buff *skb, skb->ignore_df = 1; udp_tunnel_xmit_skb(rt, sock, skb, fl.saddr, fl.daddr, ds, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, - fl.fl4_dport, false, false); + fl.fl4_dport, false, false, 0); goto out; err: diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index 0c3d571a04a1..8cf1380f3656 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -603,7 +603,7 @@ static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, u8 proto, - u8 tos, u8 ttl, __be16 df, bool xnet); + u8 tos, u8 ttl, __be16 df, bool xnet, u16 ipcb_flags); struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, gfp_t flags); int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst, diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h index 2df3b8344eb5..28102c8fd8a8 100644 --- a/include/net/udp_tunnel.h +++ b/include/net/udp_tunnel.h @@ -150,7 +150,7 @@ static inline void udp_tunnel_drop_rx_info(struct net_device *dev) void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, - bool xnet, bool nocheck); + bool xnet, bool nocheck, u16 ipcb_flags); int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb, diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 678b8f96e3e9..aaeb5d16f0c9 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -668,7 +668,7 @@ void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_adj_headroom(dev, headroom); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, proto, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return; tx_error: DEV_STATS_INC(dev, tx_errors); @@ -857,7 +857,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_adj_headroom(dev, max_headroom); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return; #if IS_ENABLED(CONFIG_IPV6) diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index f65d2f727381..cc9915543637 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -49,7 +49,8 @@ EXPORT_SYMBOL(ip6tun_encaps); void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, __u8 proto, - __u8 tos, __u8 ttl, __be16 df, bool xnet) + __u8 tos, __u8 ttl, __be16 df, bool xnet, + u16 ipcb_flags) { int pkt_len = skb->len - skb_inner_network_offset(skb); struct net *net = dev_net(rt->dst.dev); @@ -62,6 +63,7 @@ void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, skb_clear_hash_if_not_l4(skb); skb_dst_set(skb, &rt->dst); memset(IPCB(skb), 0, sizeof(*IPCB(skb))); + IPCB(skb)->flags = ipcb_flags; /* Push down and install the IP header. */ skb_push(skb, sizeof(struct iphdr)); diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c index 2326548997d3..9efd62505916 100644 --- a/net/ipv4/udp_tunnel_core.c +++ b/net/ipv4/udp_tunnel_core.c @@ -169,7 +169,7 @@ EXPORT_SYMBOL_GPL(udp_tunnel_notify_del_rx_port); void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, - bool xnet, bool nocheck) + bool xnet, bool nocheck, u16 ipcb_flags) { struct udphdr *uh; @@ -185,7 +185,8 @@ void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb udp_set_csum(nocheck, skb, src, dst, skb->len); - iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet); + iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet, + ipcb_flags); } EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb); diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index a72dbca9e8fc..12496ba1b7d4 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1035,7 +1035,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, skb_set_inner_ipproto(skb, IPPROTO_IPV6); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return NETDEV_TX_OK; tx_error_icmp: diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 8c3b80c4d40b..bfbb73e359f5 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1103,7 +1103,8 @@ static inline int sctp_v4_xmit(struct sk_buff *skb, struct sctp_transport *t) skb_set_inner_ipproto(skb, IPPROTO_SCTP); udp_tunnel_xmit_skb(dst_rtable(dst), sk, skb, fl4->saddr, fl4->daddr, dscp, ip4_dst_hoplimit(dst), df, - sctp_sk(sk)->udp_port, t->encap_port, false, false); + sctp_sk(sk)->udp_port, t->encap_port, false, false, + 0); return 0; } diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index 108a4cc2e001..87e8c1e6d550 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -197,7 +197,7 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, ttl = ip4_dst_hoplimit(&rt->dst); udp_tunnel_xmit_skb(rt, ub->ubsock->sk, skb, src->ipv4.s_addr, dst->ipv4.s_addr, 0, ttl, 0, src->port, - dst->port, false, true); + dst->port, false, true, 0); #if IS_ENABLED(CONFIG_IPV6) } else { if (!ndst) { -- 2.49.0

2 2

[PATCH net-next 01/14] net: ipv4: Add a flags argument to iptunnel_xmit(), udp_tunnel_xmit_skb()
by Petr Machata 12 Jun '25

12 Jun '25

iptunnel_xmit() erases the contents of the SKB control block. In order to be able to set particular IPCB flags on the SKB, add a corresponding parameter, and propagate it to udp_tunnel_xmit_skb() as well. In one of the following patches, VXLAN driver will use this facility to mark packets as subject to IP multicast routing. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> --- Notes: CC: Pablo Neira Ayuso <pablo(a)netfilter.org> CC: osmocom-net-gprs(a)lists.osmocom.org CC: Andrew Lunn <andrew+netdev(a)lunn.ch> CC: Taehee Yoo <ap420073(a)gmail.com> CC: Antonio Quartulli <antonio(a)openvpn.net> CC: "Jason A. Donenfeld" <Jason(a)zx2c4.com> CC: wireguard(a)lists.zx2c4.com CC: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> CC: linux-sctp(a)vger.kernel.org CC: Jon Maloy <jmaloy(a)redhat.com> CC: tipc-discussion(a)lists.sourceforge.net drivers/net/amt.c | 9 ++++++--- drivers/net/bareudp.c | 4 ++-- drivers/net/geneve.c | 4 ++-- drivers/net/gtp.c | 10 ++++++---- drivers/net/ovpn/udp.c | 2 +- drivers/net/vxlan/vxlan_core.c | 2 +- drivers/net/wireguard/socket.c | 2 +- include/net/ip_tunnels.h | 2 +- include/net/udp_tunnel.h | 2 +- net/ipv4/ip_tunnel.c | 4 ++-- net/ipv4/ip_tunnel_core.c | 4 +++- net/ipv4/udp_tunnel_core.c | 5 +++-- net/ipv6/sit.c | 2 +- net/sctp/protocol.c | 3 ++- net/tipc/udp_media.c | 2 +- 15 files changed, 33 insertions(+), 24 deletions(-) diff --git a/drivers/net/amt.c b/drivers/net/amt.c index 734a0b3242a9..d0f719531499 100644 --- a/drivers/net/amt.c +++ b/drivers/net/amt.c @@ -1046,7 +1046,8 @@ static bool amt_send_membership_update(struct amt_dev *amt, amt->gw_port, amt->relay_port, false, - false); + false, + 0); amt_update_gw_status(amt, AMT_STATUS_SENT_UPDATE, true); return false; } @@ -1103,7 +1104,8 @@ static void amt_send_multicast_data(struct amt_dev *amt, amt->relay_port, tunnel->source_port, false, - false); + false, + 0); } static bool amt_send_membership_query(struct amt_dev *amt, @@ -1161,7 +1163,8 @@ static bool amt_send_membership_query(struct amt_dev *amt, amt->relay_port, tunnel->source_port, false, - false); + false, + 0); amt_update_relay_status(tunnel, AMT_STATUS_SENT_QUERY, true); return false; } diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c index a9dffdcac805..5e613080d3f8 100644 --- a/drivers/net/bareudp.c +++ b/drivers/net/bareudp.c @@ -362,8 +362,8 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, sock->sk, skb, saddr, info->key.u.ipv4.dst, tos, ttl, df, sport, bareudp->port, !net_eq(bareudp->net, dev_net(bareudp->dev)), - !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + !test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags), + 0); return 0; free_dst: diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index ffc15a432689..c668e8b00ed2 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -921,8 +921,8 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, saddr, info->key.u.ipv4.dst, tos, ttl, df, sport, geneve->cfg.info.key.tp_dst, !net_eq(geneve->net, dev_net(geneve->dev)), - !test_bit(IP_TUNNEL_CSUM_BIT, - info->key.tun_flags)); + !test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags), + 0); return 0; } diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index d4dec741c7f4..14584793fe4e 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -446,7 +446,8 @@ static int gtp0_send_echo_resp_ip(struct gtp_dev *gtp, struct sk_buff *skb) htons(GTP0_PORT), htons(GTP0_PORT), !net_eq(sock_net(gtp->sk1u), dev_net(gtp->dev)), - false); + false, + 0); return 0; } @@ -704,7 +705,8 @@ static int gtp1u_send_echo_resp(struct gtp_dev *gtp, struct sk_buff *skb) htons(GTP1U_PORT), htons(GTP1U_PORT), !net_eq(sock_net(gtp->sk1u), dev_net(gtp->dev)), - false); + false, + 0); return 0; } @@ -1304,7 +1306,7 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev) pktinfo.gtph_port, pktinfo.gtph_port, !net_eq(sock_net(pktinfo.pctx->sk), dev_net(dev)), - false); + false, 0); break; case AF_INET6: #if IS_ENABLED(CONFIG_IPV6) @@ -2405,7 +2407,7 @@ static int gtp_genl_send_echo_req(struct sk_buff *skb, struct genl_info *info) port, port, !net_eq(sock_net(sk), dev_net(gtp->dev)), - false); + false, 0); return 0; } diff --git a/drivers/net/ovpn/udp.c b/drivers/net/ovpn/udp.c index bff00946eae2..d866e6bfda70 100644 --- a/drivers/net/ovpn/udp.c +++ b/drivers/net/ovpn/udp.c @@ -199,7 +199,7 @@ static int ovpn_udp4_output(struct ovpn_peer *peer, struct ovpn_bind *bind, transmit: udp_tunnel_xmit_skb(rt, sk, skb, fl.saddr, fl.daddr, 0, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, - fl.fl4_dport, false, sk->sk_no_check_tx); + fl.fl4_dport, false, sk->sk_no_check_tx, 0); ret = 0; err: local_bh_enable(); diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index a56d7239b127..d7a5d8873a1b 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -2522,7 +2522,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, saddr, pkey->u.ipv4.dst, tos, ttl, df, - src_port, dst_port, xnet, !udp_sum); + src_port, dst_port, xnet, !udp_sum, 0); #if IS_ENABLED(CONFIG_IPV6) } else { struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); diff --git a/drivers/net/wireguard/socket.c b/drivers/net/wireguard/socket.c index 0414d7a6ce74..88e685667bc0 100644 --- a/drivers/net/wireguard/socket.c +++ b/drivers/net/wireguard/socket.c @@ -84,7 +84,7 @@ static int send4(struct wg_device *wg, struct sk_buff *skb, skb->ignore_df = 1; udp_tunnel_xmit_skb(rt, sock, skb, fl.saddr, fl.daddr, ds, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, - fl.fl4_dport, false, false); + fl.fl4_dport, false, false, 0); goto out; err: diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index 0c3d571a04a1..8cf1380f3656 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -603,7 +603,7 @@ static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, u8 proto, - u8 tos, u8 ttl, __be16 df, bool xnet); + u8 tos, u8 ttl, __be16 df, bool xnet, u16 ipcb_flags); struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, gfp_t flags); int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst, diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h index 2df3b8344eb5..28102c8fd8a8 100644 --- a/include/net/udp_tunnel.h +++ b/include/net/udp_tunnel.h @@ -150,7 +150,7 @@ static inline void udp_tunnel_drop_rx_info(struct net_device *dev) void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, - bool xnet, bool nocheck); + bool xnet, bool nocheck, u16 ipcb_flags); int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb, diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 678b8f96e3e9..aaeb5d16f0c9 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -668,7 +668,7 @@ void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_adj_headroom(dev, headroom); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, proto, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return; tx_error: DEV_STATS_INC(dev, tx_errors); @@ -857,7 +857,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ip_tunnel_adj_headroom(dev, max_headroom); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return; #if IS_ENABLED(CONFIG_IPV6) diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index f65d2f727381..cc9915543637 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -49,7 +49,8 @@ EXPORT_SYMBOL(ip6tun_encaps); void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, __u8 proto, - __u8 tos, __u8 ttl, __be16 df, bool xnet) + __u8 tos, __u8 ttl, __be16 df, bool xnet, + u16 ipcb_flags) { int pkt_len = skb->len - skb_inner_network_offset(skb); struct net *net = dev_net(rt->dst.dev); @@ -62,6 +63,7 @@ void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, skb_clear_hash_if_not_l4(skb); skb_dst_set(skb, &rt->dst); memset(IPCB(skb), 0, sizeof(*IPCB(skb))); + IPCB(skb)->flags = ipcb_flags; /* Push down and install the IP header. */ skb_push(skb, sizeof(struct iphdr)); diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c index 2326548997d3..9efd62505916 100644 --- a/net/ipv4/udp_tunnel_core.c +++ b/net/ipv4/udp_tunnel_core.c @@ -169,7 +169,7 @@ EXPORT_SYMBOL_GPL(udp_tunnel_notify_del_rx_port); void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, - bool xnet, bool nocheck) + bool xnet, bool nocheck, u16 ipcb_flags) { struct udphdr *uh; @@ -185,7 +185,8 @@ void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb udp_set_csum(nocheck, skb, src, dst, skb->len); - iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet); + iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet, + ipcb_flags); } EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb); diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index a72dbca9e8fc..12496ba1b7d4 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1035,7 +1035,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, skb_set_inner_ipproto(skb, IPPROTO_IPV6); iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, - df, !net_eq(tunnel->net, dev_net(dev))); + df, !net_eq(tunnel->net, dev_net(dev)), 0); return NETDEV_TX_OK; tx_error_icmp: diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 8c3b80c4d40b..bfbb73e359f5 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1103,7 +1103,8 @@ static inline int sctp_v4_xmit(struct sk_buff *skb, struct sctp_transport *t) skb_set_inner_ipproto(skb, IPPROTO_SCTP); udp_tunnel_xmit_skb(dst_rtable(dst), sk, skb, fl4->saddr, fl4->daddr, dscp, ip4_dst_hoplimit(dst), df, - sctp_sk(sk)->udp_port, t->encap_port, false, false); + sctp_sk(sk)->udp_port, t->encap_port, false, false, + 0); return 0; } diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index 108a4cc2e001..87e8c1e6d550 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -197,7 +197,7 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, ttl = ip4_dst_hoplimit(&rt->dst); udp_tunnel_xmit_skb(rt, ub->ubsock->sk, skb, src->ipv4.s_addr, dst->ipv4.s_addr, 0, ttl, 0, src->port, - dst->port, false, true); + dst->port, false, true, 0); #if IS_ENABLED(CONFIG_IPV6) } else { if (!ndst) { -- 2.49.0

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osmocom-net-gprs June 2025