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nftables: backport a few ICMP & ICMPv6 fixes
- assign network ctx for ICMP & ICMPv6 - additional ICMPv6 types - allow update of net base w. meta l4proto ipv6-icmp - l4 proto fixes The initial trigger was that ICMPv6 type 143 (mld2-listener-report) wasn't working as expected. Signed-off-by: André Draszik <adraszik@tycoint.com> Acked-by: Sylvain Lemieux <slemieux@tycoint.com> Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
This commit is contained in:
André Draszik
Armin Kuster
parent
0a2c51bf8c
commit
2a1179c429
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@ -0,0 +1,323 @@
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From 0011985554e269e1cc8f8e5b41eb9dcd795ebe8c Mon Sep 17 00:00:00 2001
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From: Arturo Borrero Gonzalez <arturo@debian.org>
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Date: Wed, 25 Jan 2017 12:51:08 +0100
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Subject: [PATCH] payload: explicit network ctx assignment for icmp/icmp6 in
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special families
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In the inet, bridge and netdev families, we can add rules like these:
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% nft add rule inet t c ip protocol icmp icmp type echo-request
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% nft add rule inet t c ip6 nexthdr icmpv6 icmpv6 type echo-request
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However, when we print the ruleset:
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% nft list ruleset
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table inet t {
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chain c {
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icmpv6 type echo-request
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icmp type echo-request
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}
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}
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These rules we obtain can't be added again:
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% nft add rule inet t c icmp type echo-request
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<cmdline>:1:19-27: Error: conflicting protocols specified: inet-service vs. icmp
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add rule inet t c icmp type echo-request
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^^^^^^^^^
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% nft add rule inet t c icmpv6 type echo-request
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<cmdline>:1:19-29: Error: conflicting protocols specified: inet-service vs. icmpv6
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add rule inet t c icmpv6 type echo-request
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^^^^^^^^^^^
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Since I wouldn't expect an IP packet carrying ICMPv6, or IPv6 packet
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carrying ICMP, if the link layer is inet, the network layer protocol context
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can be safely update to 'ip' or 'ip6'.
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Moreover, nft currently generates a 'meta nfproto ipvX' depedency when
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using icmp or icmp6 in the inet family, and similar in netdev and bridge
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families.
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While at it, a bit of code factorization is introduced.
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Fixes: https://bugzilla.netfilter.org/show_bug.cgi?id=1073
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Signed-off-by: Arturo Borrero Gonzalez <arturo@debian.org>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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---
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Upstream-Status: Backport
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Signed-off-by: André Draszik <adraszik@tycoint.com>
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src/payload.c | 70 ++++++++++++++++---------------------
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tests/py/any/icmpX.t.netdev | 8 +++++
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tests/py/any/icmpX.t.netdev.payload | 36 +++++++++++++++++++
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tests/py/bridge/icmpX.t | 8 +++++
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tests/py/bridge/icmpX.t.payload | 36 +++++++++++++++++++
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tests/py/inet/icmpX.t | 8 +++++
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tests/py/inet/icmpX.t.payload | 36 +++++++++++++++++++
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7 files changed, 162 insertions(+), 40 deletions(-)
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create mode 100644 tests/py/any/icmpX.t.netdev
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create mode 100644 tests/py/any/icmpX.t.netdev.payload
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create mode 100644 tests/py/bridge/icmpX.t
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create mode 100644 tests/py/bridge/icmpX.t.payload
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create mode 100644 tests/py/inet/icmpX.t
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create mode 100644 tests/py/inet/icmpX.t.payload
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diff --git a/src/payload.c b/src/payload.c
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index af533b2..74f8254 100644
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--- a/src/payload.c
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+++ b/src/payload.c
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@@ -223,6 +223,34 @@ static int payload_add_dependency(struct eval_ctx *ctx,
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return 0;
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}
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+static const struct proto_desc *
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+payload_gen_special_dependency(struct eval_ctx *ctx, const struct expr *expr)
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+{
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+ switch (expr->payload.base) {
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+ case PROTO_BASE_LL_HDR:
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+ switch (ctx->pctx.family) {
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+ case NFPROTO_INET:
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+ return &proto_inet;
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+ case NFPROTO_BRIDGE:
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+ return &proto_eth;
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+ case NFPROTO_NETDEV:
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+ return &proto_netdev;
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+ default:
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+ break;
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+ }
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+ break;
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+ case PROTO_BASE_TRANSPORT_HDR:
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+ if (expr->payload.desc == &proto_icmp)
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+ return &proto_ip;
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+ if (expr->payload.desc == &proto_icmp6)
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+ return &proto_ip6;
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+ return &proto_inet_service;
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+ default:
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+ break;
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+ }
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+ return NULL;
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+}
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+
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/**
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* payload_gen_dependency - generate match expression on payload dependency
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*
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@@ -276,46 +304,8 @@ int payload_gen_dependency(struct eval_ctx *ctx, const struct expr *expr,
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desc = ctx->pctx.protocol[expr->payload.base - 1].desc;
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/* Special case for mixed IPv4/IPv6 and bridge tables */
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- if (desc == NULL) {
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- switch (ctx->pctx.family) {
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- case NFPROTO_INET:
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- switch (expr->payload.base) {
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- case PROTO_BASE_LL_HDR:
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- desc = &proto_inet;
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- break;
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- case PROTO_BASE_TRANSPORT_HDR:
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- desc = &proto_inet_service;
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- break;
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- default:
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- break;
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- }
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- break;
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- case NFPROTO_BRIDGE:
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- switch (expr->payload.base) {
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- case PROTO_BASE_LL_HDR:
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- desc = &proto_eth;
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- break;
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- case PROTO_BASE_TRANSPORT_HDR:
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- desc = &proto_inet_service;
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- break;
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- default:
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- break;
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- }
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- break;
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- case NFPROTO_NETDEV:
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- switch (expr->payload.base) {
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- case PROTO_BASE_LL_HDR:
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- desc = &proto_netdev;
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- break;
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- case PROTO_BASE_TRANSPORT_HDR:
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- desc = &proto_inet_service;
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- break;
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- default:
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- break;
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- }
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- break;
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- }
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- }
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+ if (desc == NULL)
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+ desc = payload_gen_special_dependency(ctx, expr);
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if (desc == NULL)
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return expr_error(ctx->msgs, expr,
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diff --git a/tests/py/any/icmpX.t.netdev b/tests/py/any/icmpX.t.netdev
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new file mode 100644
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index 0000000..a327ce6
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--- /dev/null
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+++ b/tests/py/any/icmpX.t.netdev
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@@ -0,0 +1,8 @@
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+:ingress;type filter hook ingress device lo priority 0
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+
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+*netdev;test-netdev;ingress
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+
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+ip protocol icmp icmp type echo-request;ok;icmp type echo-request
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+icmp type echo-request;ok
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+ip6 nexthdr icmpv6 icmpv6 type echo-request;ok;icmpv6 type echo-request
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+icmpv6 type echo-request;ok
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diff --git a/tests/py/any/icmpX.t.netdev.payload b/tests/py/any/icmpX.t.netdev.payload
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new file mode 100644
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index 0000000..8b8107c
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--- /dev/null
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+++ b/tests/py/any/icmpX.t.netdev.payload
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@@ -0,0 +1,36 @@
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+# ip protocol icmp icmp type echo-request
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+netdev test-netdev ingress
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+ [ meta load protocol => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+ [ payload load 1b @ network header + 9 => reg 1 ]
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+ [ cmp eq reg 1 0x00000001 ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+
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+# icmp type echo-request
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+netdev test-netdev ingress
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+ [ meta load protocol => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+ [ payload load 1b @ network header + 9 => reg 1 ]
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+ [ cmp eq reg 1 0x00000001 ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+
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+# ip6 nexthdr icmpv6 icmpv6 type echo-request
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+netdev test-netdev ingress
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+ [ meta load protocol => reg 1 ]
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+ [ cmp eq reg 1 0x0000dd86 ]
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+ [ payload load 1b @ network header + 6 => reg 1 ]
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+ [ cmp eq reg 1 0x0000003a ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000080 ]
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+
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+# icmpv6 type echo-request
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+netdev test-netdev ingress
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+ [ meta load protocol => reg 1 ]
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+ [ cmp eq reg 1 0x0000dd86 ]
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+ [ payload load 1b @ network header + 6 => reg 1 ]
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+ [ cmp eq reg 1 0x0000003a ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000080 ]
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+
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diff --git a/tests/py/bridge/icmpX.t b/tests/py/bridge/icmpX.t
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new file mode 100644
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index 0000000..8c0a597
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--- /dev/null
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+++ b/tests/py/bridge/icmpX.t
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@@ -0,0 +1,8 @@
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+:input;type filter hook input priority 0
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+
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+*bridge;test-bridge;input
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+
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+ip protocol icmp icmp type echo-request;ok;icmp type echo-request
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+icmp type echo-request;ok
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+ip6 nexthdr icmpv6 icmpv6 type echo-request;ok;icmpv6 type echo-request
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+icmpv6 type echo-request;ok
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diff --git a/tests/py/bridge/icmpX.t.payload b/tests/py/bridge/icmpX.t.payload
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new file mode 100644
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index 0000000..19efdd8
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--- /dev/null
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+++ b/tests/py/bridge/icmpX.t.payload
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@@ -0,0 +1,36 @@
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+# ip protocol icmp icmp type echo-request
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+bridge test-bridge input
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+ [ payload load 2b @ link header + 12 => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+ [ payload load 1b @ network header + 9 => reg 1 ]
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+ [ cmp eq reg 1 0x00000001 ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+
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+# icmp type echo-request
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+bridge test-bridge input
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+ [ payload load 2b @ link header + 12 => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+ [ payload load 1b @ network header + 9 => reg 1 ]
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+ [ cmp eq reg 1 0x00000001 ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000008 ]
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+
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+# ip6 nexthdr icmpv6 icmpv6 type echo-request
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+bridge test-bridge input
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+ [ payload load 2b @ link header + 12 => reg 1 ]
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+ [ cmp eq reg 1 0x0000dd86 ]
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+ [ payload load 1b @ network header + 6 => reg 1 ]
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+ [ cmp eq reg 1 0x0000003a ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000080 ]
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+
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+# icmpv6 type echo-request
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+bridge test-bridge input
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+ [ payload load 2b @ link header + 12 => reg 1 ]
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+ [ cmp eq reg 1 0x0000dd86 ]
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+ [ payload load 1b @ network header + 6 => reg 1 ]
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+ [ cmp eq reg 1 0x0000003a ]
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
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+ [ cmp eq reg 1 0x00000080 ]
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+
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diff --git a/tests/py/inet/icmpX.t b/tests/py/inet/icmpX.t
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new file mode 100644
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index 0000000..1b467a1
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--- /dev/null
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+++ b/tests/py/inet/icmpX.t
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@@ -0,0 +1,8 @@
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+:input;type filter hook input priority 0
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+
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+*inet;test-inet;input
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+
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+ip protocol icmp icmp type echo-request;ok;icmp type echo-request
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+icmp type echo-request;ok
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+ip6 nexthdr icmpv6 icmpv6 type echo-request;ok;icmpv6 type echo-request
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+icmpv6 type echo-request;ok
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diff --git a/tests/py/inet/icmpX.t.payload b/tests/py/inet/icmpX.t.payload
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new file mode 100644
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index 0000000..81ca774
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--- /dev/null
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+++ b/tests/py/inet/icmpX.t.payload
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@@ -0,0 +1,36 @@
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+# ip protocol icmp icmp type echo-request
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+inet test-inet input
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+ [ meta load nfproto => reg 1 ]
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+ [ cmp eq reg 1 0x00000002 ]
|
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+ [ payload load 1b @ network header + 9 => reg 1 ]
|
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+ [ cmp eq reg 1 0x00000001 ]
|
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
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+ [ cmp eq reg 1 0x00000008 ]
|
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+
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+# icmp type echo-request
|
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+inet test-inet input
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+ [ meta load nfproto => reg 1 ]
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+ [ cmp eq reg 1 0x00000002 ]
|
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+ [ payload load 1b @ network header + 9 => reg 1 ]
|
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+ [ cmp eq reg 1 0x00000001 ]
|
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
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+ [ cmp eq reg 1 0x00000008 ]
|
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+
|
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+# ip6 nexthdr icmpv6 icmpv6 type echo-request
|
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+inet test-inet input
|
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+ [ meta load nfproto => reg 1 ]
|
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+ [ cmp eq reg 1 0x0000000a ]
|
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+ [ payload load 1b @ network header + 6 => reg 1 ]
|
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+ [ cmp eq reg 1 0x0000003a ]
|
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
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+ [ cmp eq reg 1 0x00000080 ]
|
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+
|
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+# icmpv6 type echo-request
|
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+inet test-inet input
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+ [ meta load nfproto => reg 1 ]
|
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+ [ cmp eq reg 1 0x0000000a ]
|
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+ [ payload load 1b @ network header + 6 => reg 1 ]
|
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+ [ cmp eq reg 1 0x0000003a ]
|
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+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
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+ [ cmp eq reg 1 0x00000080 ]
|
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+
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--
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2.11.0
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|
@ -0,0 +1,147 @@
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From 9ade8fb75f8963375b45b3f2973b8bb7aa66ad76 Mon Sep 17 00:00:00 2001
|
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From: Phil Sutter <phil@nwl.cc>
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Date: Thu, 16 Mar 2017 13:43:20 +0100
|
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Subject: [PATCH] proto: Add some exotic ICMPv6 types
|
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|
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This adds support for matching on inverse ND messages as defined by
|
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RFC3122 (not implemented in Linux) and MLDv2 as defined by RFC3810.
|
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|
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Note that ICMPV6_MLD2_REPORT macro is defined in linux/icmpv6.h but
|
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including that header leads to conflicts with symbols defined in
|
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netinet/icmp6.h.
|
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|
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In addition to the above, "mld-listener-done" is introduced as an alias
|
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for "mld-listener-reduction".
|
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|
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Signed-off-by: Phil Sutter <phil@nwl.cc>
|
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
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---
|
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Upstream-Status: Backport
|
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Signed-off-by: André Draszik <adraszik@tycoint.com>
|
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src/proto.c | 8 ++++++++
|
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tests/py/ip6/icmpv6.t | 8 ++++++--
|
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tests/py/ip6/icmpv6.t.payload.ip6 | 34 +++++++++++++++++++++++++++++++++-
|
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3 files changed, 47 insertions(+), 3 deletions(-)
|
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diff --git a/src/proto.c b/src/proto.c
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index fb96530..79e9dbf 100644
|
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--- a/src/proto.c
|
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+++ b/src/proto.c
|
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@@ -632,6 +632,10 @@ const struct proto_desc proto_ip = {
|
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|
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#include <netinet/icmp6.h>
|
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|
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+#define IND_NEIGHBOR_SOLICIT 141
|
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+#define IND_NEIGHBOR_ADVERT 142
|
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+#define ICMPV6_MLD2_REPORT 143
|
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+
|
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static const struct symbol_table icmp6_type_tbl = {
|
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.base = BASE_DECIMAL,
|
||||
.symbols = {
|
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@@ -643,6 +647,7 @@ static const struct symbol_table icmp6_type_tbl = {
|
||||
SYMBOL("echo-reply", ICMP6_ECHO_REPLY),
|
||||
SYMBOL("mld-listener-query", MLD_LISTENER_QUERY),
|
||||
SYMBOL("mld-listener-report", MLD_LISTENER_REPORT),
|
||||
+ SYMBOL("mld-listener-done", MLD_LISTENER_REDUCTION),
|
||||
SYMBOL("mld-listener-reduction", MLD_LISTENER_REDUCTION),
|
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SYMBOL("nd-router-solicit", ND_ROUTER_SOLICIT),
|
||||
SYMBOL("nd-router-advert", ND_ROUTER_ADVERT),
|
||||
@@ -650,6 +655,9 @@ static const struct symbol_table icmp6_type_tbl = {
|
||||
SYMBOL("nd-neighbor-advert", ND_NEIGHBOR_ADVERT),
|
||||
SYMBOL("nd-redirect", ND_REDIRECT),
|
||||
SYMBOL("router-renumbering", ICMP6_ROUTER_RENUMBERING),
|
||||
+ SYMBOL("ind-neighbor-solicit", IND_NEIGHBOR_SOLICIT),
|
||||
+ SYMBOL("ind-neighbor-advert", IND_NEIGHBOR_ADVERT),
|
||||
+ SYMBOL("mld2-listener-report", ICMPV6_MLD2_REPORT),
|
||||
SYMBOL_LIST_END
|
||||
},
|
||||
};
|
||||
diff --git a/tests/py/ip6/icmpv6.t b/tests/py/ip6/icmpv6.t
|
||||
index afbd451..a898fe3 100644
|
||||
--- a/tests/py/ip6/icmpv6.t
|
||||
+++ b/tests/py/ip6/icmpv6.t
|
||||
@@ -11,7 +11,8 @@ icmpv6 type echo-request accept;ok
|
||||
icmpv6 type echo-reply accept;ok
|
||||
icmpv6 type mld-listener-query accept;ok
|
||||
icmpv6 type mld-listener-report accept;ok
|
||||
-icmpv6 type mld-listener-reduction accept;ok
|
||||
+icmpv6 type mld-listener-done accept;ok
|
||||
+icmpv6 type mld-listener-reduction accept;ok;icmpv6 type mld-listener-done accept
|
||||
icmpv6 type nd-router-solicit accept;ok
|
||||
icmpv6 type nd-router-advert accept;ok
|
||||
icmpv6 type nd-neighbor-solicit accept;ok
|
||||
@@ -19,8 +20,11 @@ icmpv6 type nd-neighbor-advert accept;ok
|
||||
icmpv6 type nd-redirect accept;ok
|
||||
icmpv6 type parameter-problem accept;ok
|
||||
icmpv6 type router-renumbering accept;ok
|
||||
+icmpv6 type ind-neighbor-solicit accept;ok
|
||||
+icmpv6 type ind-neighbor-advert accept;ok
|
||||
+icmpv6 type mld2-listener-report accept;ok
|
||||
icmpv6 type {destination-unreachable, time-exceeded, nd-router-solicit} accept;ok
|
||||
-icmpv6 type {router-renumbering, mld-listener-reduction, time-exceeded, nd-router-solicit} accept;ok
|
||||
+icmpv6 type {router-renumbering, mld-listener-done, time-exceeded, nd-router-solicit} accept;ok
|
||||
icmpv6 type {mld-listener-query, time-exceeded, nd-router-advert} accept;ok
|
||||
icmpv6 type != {mld-listener-query, time-exceeded, nd-router-advert} accept;ok
|
||||
|
||||
diff --git a/tests/py/ip6/icmpv6.t.payload.ip6 b/tests/py/ip6/icmpv6.t.payload.ip6
|
||||
index 9fe2496..30f58ca 100644
|
||||
--- a/tests/py/ip6/icmpv6.t.payload.ip6
|
||||
+++ b/tests/py/ip6/icmpv6.t.payload.ip6
|
||||
@@ -54,6 +54,14 @@ ip6 test-ip6 input
|
||||
[ cmp eq reg 1 0x00000083 ]
|
||||
[ immediate reg 0 accept ]
|
||||
|
||||
+# icmpv6 type mld-listener-done accept
|
||||
+ip6 test-ip6 input
|
||||
+ [ payload load 1b @ network header + 6 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000003a ]
|
||||
+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x00000084 ]
|
||||
+ [ immediate reg 0 accept ]
|
||||
+
|
||||
# icmpv6 type mld-listener-reduction accept
|
||||
ip6 test-ip6 input
|
||||
[ payload load 1b @ network header + 6 => reg 1 ]
|
||||
@@ -118,6 +126,30 @@ ip6 test-ip6 input
|
||||
[ cmp eq reg 1 0x0000008a ]
|
||||
[ immediate reg 0 accept ]
|
||||
|
||||
+# icmpv6 type ind-neighbor-solicit accept
|
||||
+ip6 test-ip6 input
|
||||
+ [ payload load 1b @ network header + 6 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000003a ]
|
||||
+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000008d ]
|
||||
+ [ immediate reg 0 accept ]
|
||||
+
|
||||
+# icmpv6 type ind-neighbor-advert accept
|
||||
+ip6 test-ip6 input
|
||||
+ [ payload load 1b @ network header + 6 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000003a ]
|
||||
+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000008e ]
|
||||
+ [ immediate reg 0 accept ]
|
||||
+
|
||||
+# icmpv6 type mld2-listener-report accept
|
||||
+ip6 test-ip6 input
|
||||
+ [ payload load 1b @ network header + 6 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000003a ]
|
||||
+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000008f ]
|
||||
+ [ immediate reg 0 accept ]
|
||||
+
|
||||
# icmpv6 type {destination-unreachable, time-exceeded, nd-router-solicit} accept
|
||||
__set%d test-ip6 3
|
||||
__set%d test-ip6 0
|
||||
@@ -129,7 +161,7 @@ ip6 test-ip6 input
|
||||
[ lookup reg 1 set __set%d ]
|
||||
[ immediate reg 0 accept ]
|
||||
|
||||
-# icmpv6 type {router-renumbering, mld-listener-reduction, time-exceeded, nd-router-solicit} accept
|
||||
+# icmpv6 type {router-renumbering, mld-listener-done, time-exceeded, nd-router-solicit} accept
|
||||
__set%d test-ip6 3
|
||||
__set%d test-ip6 0
|
||||
element 0000008a : 0 [end] element 00000084 : 0 [end] element 00000003 : 0 [end] element 00000085 : 0 [end]
|
||||
--
|
||||
2.11.0
|
||||
|
||||
|
|
@ -0,0 +1,62 @@
|
|||
From 8d8cfe5ad6ca460a5262fb15fdbef3601058c784 Mon Sep 17 00:00:00 2001
|
||||
From: Florian Westphal <fw@strlen.de>
|
||||
Date: Thu, 18 May 2017 13:30:54 +0200
|
||||
Subject: [PATCH 1/4] payload: split ll proto dependency into helper
|
||||
|
||||
will be re-used in folloup patch for icmp/icmpv6 depenency
|
||||
handling.
|
||||
|
||||
Signed-off-by: Florian Westphal <fw@strlen.de>
|
||||
---
|
||||
Upstream-Status: Backport
|
||||
Signed-off-by: André Draszik <adraszik@tycoint.com>
|
||||
src/payload.c | 29 ++++++++++++++++++-----------
|
||||
1 file changed, 18 insertions(+), 11 deletions(-)
|
||||
|
||||
diff --git a/src/payload.c b/src/payload.c
|
||||
index 55128fe..31e5a02 100644
|
||||
--- a/src/payload.c
|
||||
+++ b/src/payload.c
|
||||
@@ -224,21 +224,28 @@ static int payload_add_dependency(struct eval_ctx *ctx,
|
||||
}
|
||||
|
||||
static const struct proto_desc *
|
||||
+payload_get_get_ll_hdr(const struct eval_ctx *ctx)
|
||||
+{
|
||||
+ switch (ctx->pctx.family) {
|
||||
+ case NFPROTO_INET:
|
||||
+ return &proto_inet;
|
||||
+ case NFPROTO_BRIDGE:
|
||||
+ return &proto_eth;
|
||||
+ case NFPROTO_NETDEV:
|
||||
+ return &proto_netdev;
|
||||
+ default:
|
||||
+ break;
|
||||
+ }
|
||||
+
|
||||
+ return NULL;
|
||||
+}
|
||||
+
|
||||
+static const struct proto_desc *
|
||||
payload_gen_special_dependency(struct eval_ctx *ctx, const struct expr *expr)
|
||||
{
|
||||
switch (expr->payload.base) {
|
||||
case PROTO_BASE_LL_HDR:
|
||||
- switch (ctx->pctx.family) {
|
||||
- case NFPROTO_INET:
|
||||
- return &proto_inet;
|
||||
- case NFPROTO_BRIDGE:
|
||||
- return &proto_eth;
|
||||
- case NFPROTO_NETDEV:
|
||||
- return &proto_netdev;
|
||||
- default:
|
||||
- break;
|
||||
- }
|
||||
- break;
|
||||
+ return payload_get_get_ll_hdr(ctx);
|
||||
case PROTO_BASE_TRANSPORT_HDR:
|
||||
if (expr->payload.desc == &proto_icmp)
|
||||
return &proto_ip;
|
||||
--
|
||||
2.11.0
|
||||
|
||||
|
|
@ -0,0 +1,65 @@
|
|||
From 9a1f2bbf3cd2417e0c10d18578e224abe2071d68 Mon Sep 17 00:00:00 2001
|
||||
From: Florian Westphal <fw@strlen.de>
|
||||
Date: Tue, 21 Mar 2017 19:47:22 +0100
|
||||
Subject: [PATCH 2/4] src: allow update of net base w. meta l4proto icmpv6
|
||||
|
||||
nft add rule ip6 f i meta l4proto ipv6-icmp icmpv6 type nd-router-advert
|
||||
<cmdline>:1:50-60: Error: conflicting protocols specified: unknown vs. icmpv6
|
||||
|
||||
add icmpv6 to nexthdr list so base gets updated correctly.
|
||||
|
||||
Reported-by: Thomas Woerner <twoerner@redhat.com>
|
||||
Signed-off-by: Florian Westphal <fw@strlen.de>
|
||||
---
|
||||
Upstream-Status: Backport
|
||||
Signed-off-by: André Draszik <adraszik@tycoint.com>
|
||||
src/proto.c | 1 +
|
||||
tests/py/any/meta.t | 1 +
|
||||
tests/py/any/meta.t.payload | 7 +++++++
|
||||
3 files changed, 9 insertions(+)
|
||||
|
||||
diff --git a/src/proto.c b/src/proto.c
|
||||
index 79e9dbf..fcdfbe7 100644
|
||||
--- a/src/proto.c
|
||||
+++ b/src/proto.c
|
||||
@@ -779,6 +779,7 @@ const struct proto_desc proto_inet_service = {
|
||||
PROTO_LINK(IPPROTO_TCP, &proto_tcp),
|
||||
PROTO_LINK(IPPROTO_DCCP, &proto_dccp),
|
||||
PROTO_LINK(IPPROTO_SCTP, &proto_sctp),
|
||||
+ PROTO_LINK(IPPROTO_ICMPV6, &proto_icmp6),
|
||||
},
|
||||
.templates = {
|
||||
[0] = PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
|
||||
diff --git a/tests/py/any/meta.t b/tests/py/any/meta.t
|
||||
index c3ac0a4..2ff942f 100644
|
||||
--- a/tests/py/any/meta.t
|
||||
+++ b/tests/py/any/meta.t
|
||||
@@ -38,6 +38,7 @@ meta l4proto { 33, 55, 67, 88};ok;meta l4proto { 33, 55, 67, 88}
|
||||
meta l4proto != { 33, 55, 67, 88};ok
|
||||
meta l4proto { 33-55};ok
|
||||
meta l4proto != { 33-55};ok
|
||||
+meta l4proto ipv6-icmp icmpv6 type nd-router-advert;ok;icmpv6 type nd-router-advert
|
||||
|
||||
meta priority root;ok
|
||||
meta priority none;ok
|
||||
diff --git a/tests/py/any/meta.t.payload b/tests/py/any/meta.t.payload
|
||||
index e432656..871f1ad 100644
|
||||
--- a/tests/py/any/meta.t.payload
|
||||
+++ b/tests/py/any/meta.t.payload
|
||||
@@ -187,6 +187,13 @@ ip test-ip4 input
|
||||
[ byteorder reg 1 = hton(reg 1, 2, 1) ]
|
||||
[ lookup reg 1 set __set%d 0x1 ]
|
||||
|
||||
+# meta l4proto ipv6-icmp icmpv6 type nd-router-advert
|
||||
+ip test-ip4 input
|
||||
+ [ meta load l4proto => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x0000003a ]
|
||||
+ [ payload load 1b @ transport header + 0 => reg 1 ]
|
||||
+ [ cmp eq reg 1 0x00000086 ]
|
||||
+
|
||||
# meta mark 0x4
|
||||
ip test-ip4 input
|
||||
[ meta load mark => reg 1 ]
|
||||
--
|
||||
2.11.0
|
||||
|
||||
|
|
@ -0,0 +1,98 @@
|
|||
From 2366ed9ffcb4f5f5341f10f0a1d1a4688d37ad87 Mon Sep 17 00:00:00 2001
|
||||
From: Florian Westphal <fw@strlen.de>
|
||||
Date: Wed, 22 Mar 2017 15:08:48 +0100
|
||||
Subject: [PATCH 3/4] src: ipv6: switch implicit dependencies to meta l4proto
|
||||
|
||||
when using rule like
|
||||
|
||||
ip6 filter input tcp dport 22
|
||||
nft generates:
|
||||
[ payload load 1b @ network header + 6 => reg 1 ]
|
||||
[ cmp eq reg 1 0x00000006 ]
|
||||
[ payload load 2b @ transport header + 2 => reg 1 ]
|
||||
[ cmp eq reg 1 0x00001600 ]
|
||||
|
||||
which is: ip6 filter input ip6 nexthdr tcp dport 22
|
||||
IOW, such a rule won't match if e.g. a fragment header is in place.
|
||||
|
||||
This changes ip6_proto to use 'meta l4proto' which is the protocol header
|
||||
found by exthdr walk.
|
||||
|
||||
A side effect is that for bridge we get a shorter dependency chain as it
|
||||
no longer needs to prepend 'ether proto ipv6' for old 'ip6 nexthdr' dep.
|
||||
|
||||
Only problem:
|
||||
|
||||
ip6 nexthdr tcp tcp dport 22
|
||||
will now inject a (useless) meta l4 dependency as ip6 nexthdr is no
|
||||
longer flagged as EXPR_F_PROTOCOL, to avoid this add a small helper
|
||||
that skips the unneded meta dependency in that case.
|
||||
|
||||
Signed-off-by: Florian Westphal <fw@strlen.de>
|
||||
---
|
||||
Upstream-Status: Backport
|
||||
Signed-off-by: André Draszik <adraszik@tycoint.com>
|
||||
src/payload.c | 19 ++++++++++++++++++-
|
||||
src/proto.c | 2 +-
|
||||
2 files changed, 19 insertions(+), 2 deletions(-)
|
||||
|
||||
diff --git a/src/payload.c b/src/payload.c
|
||||
index 31e5a02..38db15e 100644
|
||||
--- a/src/payload.c
|
||||
+++ b/src/payload.c
|
||||
@@ -117,6 +117,23 @@ static const struct expr_ops payload_expr_ops = {
|
||||
.pctx_update = payload_expr_pctx_update,
|
||||
};
|
||||
|
||||
+/*
|
||||
+ * ipv6 is special case, we normally use 'meta l4proto' to fetch the last
|
||||
+ * l4 header of the ipv6 extension header chain so we will also match
|
||||
+ * tcp after a fragmentation header, for instance.
|
||||
+ *
|
||||
+ * If user specifically asks for nexthdr x, treat is as a full
|
||||
+ * dependency rather than injecting another (useless) meta l4 one.
|
||||
+ */
|
||||
+static bool proto_key_is_protocol(const struct proto_desc *desc, unsigned int type)
|
||||
+{
|
||||
+ if (type == desc->protocol_key ||
|
||||
+ (desc == &proto_ip6 && type == IP6HDR_NEXTHDR))
|
||||
+ return true;
|
||||
+
|
||||
+ return false;
|
||||
+}
|
||||
+
|
||||
struct expr *payload_expr_alloc(const struct location *loc,
|
||||
const struct proto_desc *desc,
|
||||
unsigned int type)
|
||||
@@ -129,7 +146,7 @@ struct expr *payload_expr_alloc(const struct location *loc,
|
||||
if (desc != NULL) {
|
||||
tmpl = &desc->templates[type];
|
||||
base = desc->base;
|
||||
- if (type == desc->protocol_key)
|
||||
+ if (proto_key_is_protocol(desc, type))
|
||||
flags = EXPR_F_PROTOCOL;
|
||||
} else {
|
||||
tmpl = &proto_unknown_template;
|
||||
diff --git a/src/proto.c b/src/proto.c
|
||||
index fcdfbe7..3b20a5f 100644
|
||||
--- a/src/proto.c
|
||||
+++ b/src/proto.c
|
||||
@@ -707,7 +707,6 @@ const struct proto_desc proto_icmp6 = {
|
||||
const struct proto_desc proto_ip6 = {
|
||||
.name = "ip6",
|
||||
.base = PROTO_BASE_NETWORK_HDR,
|
||||
- .protocol_key = IP6HDR_NEXTHDR,
|
||||
.protocols = {
|
||||
PROTO_LINK(IPPROTO_ESP, &proto_esp),
|
||||
PROTO_LINK(IPPROTO_AH, &proto_ah),
|
||||
@@ -720,6 +719,7 @@ const struct proto_desc proto_ip6 = {
|
||||
PROTO_LINK(IPPROTO_ICMPV6, &proto_icmp6),
|
||||
},
|
||||
.templates = {
|
||||
+ [0] = PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
|
||||
[IP6HDR_VERSION] = HDR_BITFIELD("version", &integer_type, 0, 4),
|
||||
[IP6HDR_DSCP] = HDR_BITFIELD("dscp", &dscp_type, 4, 6),
|
||||
[IP6HDR_ECN] = HDR_BITFIELD("ecn", &ecn_type, 10, 2),
|
||||
--
|
||||
2.11.0
|
||||
|
||||
|
|
@ -0,0 +1,84 @@
|
|||
From f21a7a4849b50c30341ec571813bd7fe37040ad3 Mon Sep 17 00:00:00 2001
|
||||
From: Florian Westphal <fw@strlen.de>
|
||||
Date: Thu, 18 May 2017 13:30:54 +0200
|
||||
Subject: [PATCH 4/4] payload: enforce ip/ip6 protocol depending on icmp or
|
||||
icmpv6
|
||||
|
||||
After some discussion with Pablo we agreed to treat icmp/icmpv6 specially.
|
||||
|
||||
in the case of a rule like 'tcp dport 22' the inet, bridge and netdev
|
||||
families only care about the lower layer protocol.
|
||||
|
||||
In the icmpv6 case however we'd like to also enforce an ipv6 protocol check
|
||||
(and ipv4 check in icmp case).
|
||||
|
||||
This extends payload_gen_special_dependency() to consider this.
|
||||
With this patch:
|
||||
|
||||
add rule $pf filter input meta l4proto icmpv6
|
||||
add rule $pf filter input meta l4proto icmpv6 icmpv6 type echo-request
|
||||
add rule $pf filter input icmpv6 type echo-request
|
||||
|
||||
will work in all tables and all families.
|
||||
For inet/bridge/netdev, an ipv6 protocol dependency is added; this will
|
||||
not match ipv4 packets with ip->protocol == icmpv6, EXCEPT in the case
|
||||
of the ip family.
|
||||
|
||||
Its still possible to match icmpv6-in-ipv4 in inet/bridge/netdev with an
|
||||
explicit dependency:
|
||||
|
||||
add rule inet f i ip protocol ipv6-icmp meta l4proto ipv6-icmp icmpv6 type ...
|
||||
|
||||
Implicit dependencies won't get removed at the moment, so
|
||||
bridge ... icmp type echo-request
|
||||
will be shown as
|
||||
ether type ip meta l4proto 1 icmp type echo-request
|
||||
|
||||
Signed-off-by: Florian Westphal <fw@strlen.de>
|
||||
---
|
||||
Upstream-Status: Backport
|
||||
Signed-off-by: André Draszik <adraszik@tycoint.com>
|
||||
src/payload.c | 27 +++++++++++++++++++++++----
|
||||
1 file changed, 23 insertions(+), 4 deletions(-)
|
||||
|
||||
diff --git a/src/payload.c b/src/payload.c
|
||||
index 38db15e..8796ee5 100644
|
||||
--- a/src/payload.c
|
||||
+++ b/src/payload.c
|
||||
@@ -264,10 +264,29 @@ payload_gen_special_dependency(struct eval_ctx *ctx, const struct expr *expr)
|
||||
case PROTO_BASE_LL_HDR:
|
||||
return payload_get_get_ll_hdr(ctx);
|
||||
case PROTO_BASE_TRANSPORT_HDR:
|
||||
- if (expr->payload.desc == &proto_icmp)
|
||||
- return &proto_ip;
|
||||
- if (expr->payload.desc == &proto_icmp6)
|
||||
- return &proto_ip6;
|
||||
+ if (expr->payload.desc == &proto_icmp ||
|
||||
+ expr->payload.desc == &proto_icmp6) {
|
||||
+ const struct proto_desc *desc, *desc_upper;
|
||||
+ struct stmt *nstmt;
|
||||
+
|
||||
+ desc = ctx->pctx.protocol[PROTO_BASE_LL_HDR].desc;
|
||||
+ if (!desc) {
|
||||
+ desc = payload_get_get_ll_hdr(ctx);
|
||||
+ if (!desc)
|
||||
+ break;
|
||||
+ }
|
||||
+
|
||||
+ desc_upper = &proto_ip6;
|
||||
+ if (expr->payload.desc == &proto_icmp)
|
||||
+ desc_upper = &proto_ip;
|
||||
+
|
||||
+ if (payload_add_dependency(ctx, desc, desc_upper,
|
||||
+ expr, &nstmt) < 0)
|
||||
+ return NULL;
|
||||
+
|
||||
+ list_add_tail(&nstmt->list, &ctx->stmt->list);
|
||||
+ return desc_upper;
|
||||
+ }
|
||||
return &proto_inet_service;
|
||||
default:
|
||||
break;
|
||||
--
|
||||
2.11.0
|
||||
|
||||
|
|
@ -0,0 +1,86 @@
|
|||
From 0825c57d571bb7121e7048e198b9b023f7e7f358 Mon Sep 17 00:00:00 2001
|
||||
From: Florian Westphal <fw@strlen.de>
|
||||
Date: Sun, 7 May 2017 03:53:30 +0200
|
||||
Subject: [PATCH] src: ip: switch implicit dependencies to meta l4proto too
|
||||
|
||||
after ip6 nexthdr also switch ip to meta l4proto instead of ip protocol.
|
||||
|
||||
While its needed for ipv6 (due to extension headers) this isn't needed
|
||||
for ip but it has the advantage that
|
||||
|
||||
tcp dport 22
|
||||
|
||||
produces same expressions for ip/ip6/inet families.
|
||||
|
||||
Signed-off-by: Florian Westphal <fw@strlen.de>
|
||||
---
|
||||
Upstream-Status: Backport
|
||||
Signed-off-by: André Draszik <adraszik@tycoint.com>
|
||||
src/payload.c | 17 +++++++++++------
|
||||
src/proto.c | 3 ++-
|
||||
2 files changed, 13 insertions(+), 7 deletions(-)
|
||||
|
||||
diff --git a/src/payload.c b/src/payload.c
|
||||
index 8796ee5..11b6df3 100644
|
||||
--- a/src/payload.c
|
||||
+++ b/src/payload.c
|
||||
@@ -118,17 +118,22 @@ static const struct expr_ops payload_expr_ops = {
|
||||
};
|
||||
|
||||
/*
|
||||
- * ipv6 is special case, we normally use 'meta l4proto' to fetch the last
|
||||
- * l4 header of the ipv6 extension header chain so we will also match
|
||||
+ * We normally use 'meta l4proto' to fetch the last l4 header of the
|
||||
+ * ipv6 extension header chain so we will also match
|
||||
* tcp after a fragmentation header, for instance.
|
||||
+ * For consistency we also use meta l4proto for ipv4.
|
||||
*
|
||||
- * If user specifically asks for nexthdr x, treat is as a full
|
||||
- * dependency rather than injecting another (useless) meta l4 one.
|
||||
+ * If user specifically asks for nexthdr x, don't add another (useless)
|
||||
+ * meta dependency.
|
||||
*/
|
||||
static bool proto_key_is_protocol(const struct proto_desc *desc, unsigned int type)
|
||||
{
|
||||
- if (type == desc->protocol_key ||
|
||||
- (desc == &proto_ip6 && type == IP6HDR_NEXTHDR))
|
||||
+ if (type == desc->protocol_key)
|
||||
+ return true;
|
||||
+
|
||||
+ if (desc == &proto_ip6 && type == IP6HDR_NEXTHDR)
|
||||
+ return true;
|
||||
+ if (desc == &proto_ip && type == IPHDR_PROTOCOL)
|
||||
return true;
|
||||
|
||||
return false;
|
||||
diff --git a/src/proto.c b/src/proto.c
|
||||
index 3b20a5f..2afedf7 100644
|
||||
--- a/src/proto.c
|
||||
+++ b/src/proto.c
|
||||
@@ -587,7 +587,6 @@ const struct proto_desc proto_ip = {
|
||||
.name = "ip",
|
||||
.base = PROTO_BASE_NETWORK_HDR,
|
||||
.checksum_key = IPHDR_CHECKSUM,
|
||||
- .protocol_key = IPHDR_PROTOCOL,
|
||||
.protocols = {
|
||||
PROTO_LINK(IPPROTO_ICMP, &proto_icmp),
|
||||
PROTO_LINK(IPPROTO_ESP, &proto_esp),
|
||||
@@ -600,6 +599,7 @@ const struct proto_desc proto_ip = {
|
||||
PROTO_LINK(IPPROTO_SCTP, &proto_sctp),
|
||||
},
|
||||
.templates = {
|
||||
+ [0] = PROTO_META_TEMPLATE("l4proto", &inet_protocol_type, NFT_META_L4PROTO, 8),
|
||||
[IPHDR_VERSION] = HDR_BITFIELD("version", &integer_type, 0, 4),
|
||||
[IPHDR_HDRLENGTH] = HDR_BITFIELD("hdrlength", &integer_type, 4, 4),
|
||||
[IPHDR_DSCP] = HDR_BITFIELD("dscp", &dscp_type, 8, 6),
|
||||
@@ -779,6 +779,7 @@ const struct proto_desc proto_inet_service = {
|
||||
PROTO_LINK(IPPROTO_TCP, &proto_tcp),
|
||||
PROTO_LINK(IPPROTO_DCCP, &proto_dccp),
|
||||
PROTO_LINK(IPPROTO_SCTP, &proto_sctp),
|
||||
+ PROTO_LINK(IPPROTO_ICMP, &proto_icmp),
|
||||
PROTO_LINK(IPPROTO_ICMPV6, &proto_icmp6),
|
||||
},
|
||||
.templates = {
|
||||
--
|
||||
2.11.0
|
||||
|
||||
|
|
@ -9,6 +9,15 @@ RRECOMMENDS_${PN} += "kernel-module-nf-tables \
|
|||
|
||||
SRC_URI = "http://www.netfilter.org/projects/nftables/files/${BP}.tar.bz2 \
|
||||
file://fix-to-generate-ntf.8.patch \
|
||||
\
|
||||
file://0001-payload-explicit-network-ctx-assignment-for-icmp-icm.patch \
|
||||
file://0002-proto-Add-some-exotic-ICMPv6-types.patch \
|
||||
\
|
||||
file://0003-payload-split-ll-proto-dependency-into-helper.patch \
|
||||
file://0004-src-allow-update-of-net-base-w.-meta-l4proto-icmpv6.patch \
|
||||
file://0005-src-ipv6-switch-implicit-dependencies-to-meta-l4prot.patch \
|
||||
file://0006-payload-enforce-ip-ip6-protocol-depending-on-icmp-or.patch \
|
||||
file://0007-src-ip-switch-implicit-dependencies-to-meta-l4proto-.patch \
|
||||
"
|
||||
SRC_URI[md5sum] = "4c005e76a15a029afaba71d7db21d065"
|
||||
SRC_URI[sha256sum] = "fe639239d801ce5890397f6f4391c58a934bfc27d8b7d5ef922692de5ec4ed43"
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user