From 24eec64aa52b65b606d8cc0b03619f3974f12484 Mon Sep 17 00:00:00 2001 From: Andrea Claudi Date: Wed, 5 Jun 2019 13:08:41 +0200 Subject: [PATCH] gre/gre6: allow clearing {,i,o}{key,seq,csum} flags Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1714660 Upstream Status: iproute2.git commit 7f520601f59ee Conflicts: context change on ip/link_gre?.c due to missing commit ae91205c4d2a7 ("gre/gre6: Unify gre_print_help()") commit 7f520601f59ee35da2fc48b3f1b39ed2b80c9efa Author: Sabrina Dubroca Date: Fri Apr 20 10:32:00 2018 +0200 gre/gre6: allow clearing {,i,o}{key,seq,csum} flags Currently, iproute allows setting those flags, but it's impossible to clear them, since their current value is fetched from the kernel and then we OR in the additional flags passed on the command line. Add no* variants to allow clearing them. Signed-off-by: Sabrina Dubroca Signed-off-by: David Ahern --- ip/link_gre.c | 30 +++++++++++++++++++++++++++--- ip/link_gre6.c | 30 +++++++++++++++++++++++++++--- man/man8/ip-link.8.in | 27 ++++++++++++++++++--------- 3 files changed, 72 insertions(+), 15 deletions(-) diff --git a/ip/link_gre.c b/ip/link_gre.c index 1376d2e3af7de..41e2edbedb6eb 100644 --- a/ip/link_gre.c +++ b/ip/link_gre.c @@ -28,9 +28,9 @@ static void print_usage(FILE *f) fprintf(f, "Usage: ... { gre | gretap } [ remote ADDR ]\n" " [ local ADDR ]\n" - " [ [i|o]seq ]\n" - " [ [i|o]key KEY ]\n" - " [ [i|o]csum ]\n" + " [ [no][i|o]seq ]\n" + " [ [i|o]key KEY | no[i|o]key ]\n" + " [ [no][i|o]csum ]\n" " [ ttl TTL ]\n" " [ tos TOS ]\n" " [ [no]pmtudisc ]\n" @@ -171,28 +171,52 @@ get_failed: iflags |= GRE_KEY; oflags |= GRE_KEY; ikey = okey = tnl_parse_key("key", *argv); + } else if (!matches(*argv, "nokey")) { + iflags &= ~GRE_KEY; + oflags &= ~GRE_KEY; + ikey = okey = 0; } else if (!matches(*argv, "ikey")) { NEXT_ARG(); iflags |= GRE_KEY; ikey = tnl_parse_key("ikey", *argv); + } else if (!matches(*argv, "noikey")) { + iflags &= ~GRE_KEY; + ikey = 0; } else if (!matches(*argv, "okey")) { NEXT_ARG(); oflags |= GRE_KEY; okey = tnl_parse_key("okey", *argv); + } else if (!matches(*argv, "nookey")) { + oflags &= ~GRE_KEY; + okey = 0; } else if (!matches(*argv, "seq")) { iflags |= GRE_SEQ; oflags |= GRE_SEQ; + } else if (!matches(*argv, "noseq")) { + iflags &= ~GRE_SEQ; + oflags &= ~GRE_SEQ; } else if (!matches(*argv, "iseq")) { iflags |= GRE_SEQ; + } else if (!matches(*argv, "noiseq")) { + iflags &= ~GRE_SEQ; } else if (!matches(*argv, "oseq")) { oflags |= GRE_SEQ; + } else if (!matches(*argv, "nooseq")) { + oflags &= ~GRE_SEQ; } else if (!matches(*argv, "csum")) { iflags |= GRE_CSUM; oflags |= GRE_CSUM; + } else if (!matches(*argv, "nocsum")) { + iflags &= ~GRE_CSUM; + oflags &= ~GRE_CSUM; } else if (!matches(*argv, "icsum")) { iflags |= GRE_CSUM; + } else if (!matches(*argv, "noicsum")) { + iflags &= ~GRE_CSUM; } else if (!matches(*argv, "ocsum")) { oflags |= GRE_CSUM; + } else if (!matches(*argv, "noocsum")) { + oflags &= ~GRE_CSUM; } else if (!matches(*argv, "nopmtudisc")) { pmtudisc = 0; } else if (!matches(*argv, "pmtudisc")) { diff --git a/ip/link_gre6.c b/ip/link_gre6.c index 22e6e44aae29b..127e51de4ab73 100644 --- a/ip/link_gre6.c +++ b/ip/link_gre6.c @@ -35,9 +35,9 @@ static void print_usage(FILE *f) fprintf(f, "Usage: ... { ip6gre | ip6gretap } [ remote ADDR ]\n" " [ local ADDR ]\n" - " [ [i|o]seq ]\n" - " [ [i|o]key KEY ]\n" - " [ [i|o]csum ]\n" + " [ [no][i|o]seq ]\n" + " [ [i|o]key KEY | no[i|o]key ]\n" + " [ [no][i|o]csum ]\n" " [ hoplimit TTL ]\n" " [ encaplimit ELIM ]\n" " [ tclass TCLASS ]\n" @@ -185,28 +185,52 @@ get_failed: iflags |= GRE_KEY; oflags |= GRE_KEY; ikey = okey = tnl_parse_key("key", *argv); + } else if (!matches(*argv, "nokey")) { + iflags &= ~GRE_KEY; + oflags &= ~GRE_KEY; + ikey = okey = 0; } else if (!matches(*argv, "ikey")) { NEXT_ARG(); iflags |= GRE_KEY; ikey = tnl_parse_key("ikey", *argv); + } else if (!matches(*argv, "noikey")) { + iflags &= ~GRE_KEY; + ikey = 0; } else if (!matches(*argv, "okey")) { NEXT_ARG(); oflags |= GRE_KEY; okey = tnl_parse_key("okey", *argv); + } else if (!matches(*argv, "nookey")) { + oflags &= ~GRE_KEY; + okey = 0; } else if (!matches(*argv, "seq")) { iflags |= GRE_SEQ; oflags |= GRE_SEQ; + } else if (!matches(*argv, "noseq")) { + iflags &= ~GRE_SEQ; + oflags &= ~GRE_SEQ; } else if (!matches(*argv, "iseq")) { iflags |= GRE_SEQ; + } else if (!matches(*argv, "noiseq")) { + iflags &= ~GRE_SEQ; } else if (!matches(*argv, "oseq")) { oflags |= GRE_SEQ; + } else if (!matches(*argv, "nooseq")) { + oflags &= ~GRE_SEQ; } else if (!matches(*argv, "csum")) { iflags |= GRE_CSUM; oflags |= GRE_CSUM; + } else if (!matches(*argv, "nocsum")) { + iflags &= ~GRE_CSUM; + oflags &= ~GRE_CSUM; } else if (!matches(*argv, "icsum")) { iflags |= GRE_CSUM; + } else if (!matches(*argv, "noicsum")) { + iflags &= ~GRE_CSUM; } else if (!matches(*argv, "ocsum")) { oflags |= GRE_CSUM; + } else if (!matches(*argv, "noocsum")) { + oflags &= ~GRE_CSUM; } else if (!matches(*argv, "remote")) { inet_prefix addr; diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in index cfea1bdfdc030..8be5d5e1e9fd6 100644 --- a/man/man8/ip-link.8.in +++ b/man/man8/ip-link.8.in @@ -708,12 +708,14 @@ the following additional arguments are supported: .BR type " { " gre " | " gretap " }" .BI " remote " ADDR " local " ADDR [ -.RB [ i | o ] seq +.RB [ no ] "" [ i | o ] seq ] [ .RB [ i | o ] key .I KEY +| +.BR no [ i | o ] key ] [ -.RB [ i | o ] csum +.RB [ no ] "" [ i | o ] csum ] [ .BI ttl " TTL " ] [ @@ -749,7 +751,7 @@ the following additional arguments are supported: It must be an address on another interface on this host. .sp -.RB [ i | o ] seq +.RB [ no ] "" [ i | o ] seq - serialize packets. The .B oseq @@ -761,6 +763,8 @@ flag requires that all input packets are serialized. .sp .RB [ i | o ] key .I KEY +| +.BR no [ i | o ] key - use keyed GRE with key .IR KEY ". "KEY is either a number or an IPv4 address-like dotted quad. @@ -772,7 +776,7 @@ The parameters specify different keys for input and output. .sp -.RB [ i | o ] csum +.RB [ no ] "" [ i | o ] csum - generate/require checksums for tunneled packets. The .B ocsum @@ -853,12 +857,14 @@ the following additional arguments are supported: .BR type " { " ip6gre " | " ip6gretap " }" .BI remote " ADDR " local " ADDR" [ -.RB [ i | o ] seq +.RB [ no ] "" [ i | o ] seq ] [ .RB [ i | o ] key .I KEY +| +.BR no [ i | o ] key ] [ -.RB [ i | o ] csum +.RB [ no ] "" [ i | o ] csum ] [ .BI hoplimit " TTL " ] [ @@ -884,7 +890,7 @@ the following additional arguments are supported: It must be an address on another interface on this host. .sp -.RB [ i | o ] seq +.RB [ no ] "" [ i | o ] seq - serialize packets. The .B oseq @@ -894,7 +900,10 @@ The flag requires that all input packets are serialized. .sp -.RB [ i | o ] key " \fIKEY" +.RB [ i | o ] key +.I KEY +| +.BR no [ i | o ] key - use keyed GRE with key .IR KEY ". "KEY is either a number or an IPv4 address-like dotted quad. @@ -906,7 +915,7 @@ The parameters specify different keys for input and output. .sp -.RB [ i | o ] csum +.RB [ no ] "" [ i | o ] csum - generate/require checksums for tunneled packets. The .B ocsum -- 2.20.1