From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Herbert Subject: [PATCH 5/5] ip link gre: Add support to configure FOU and GUE Date: Fri, 3 Oct 2014 08:55:18 -0700 Message-ID: <1412351718-22921-6-git-send-email-therbert@google.com> References: <1412351718-22921-1-git-send-email-therbert@google.com> To: davem@davemloft.net, stephen@networkplumber.org, netdev@vger.kernel.org Return-path: Received: from mail-pd0-f176.google.com ([209.85.192.176]:61513 "EHLO mail-pd0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754114AbaJCP4M (ORCPT ); Fri, 3 Oct 2014 11:56:12 -0400 Received: by mail-pd0-f176.google.com with SMTP id fp1so2710944pdb.7 for ; Fri, 03 Oct 2014 08:56:12 -0700 (PDT) In-Reply-To: <1412351718-22921-1-git-send-email-therbert@google.com> Sender: netdev-owner@vger.kernel.org List-ID: This patch adds support to configure foo-over-udp (FOU) and Generic UDP Encapsulation for GRE tunnels. This configuration allows selection of FOU or GUE for the tunnel, specification of the source and destination ports for UDP tunnel, and enabling TX checksum. This configuration only affects the transmit side of a tunnel. Example: ip link add name tun1 type gre remote 192.168.1.1 local 192.168.1.2 \ ttl 225 encap fou encap-sport auto encap-dport 7777 encap-csum This would create an GRE tunnel in GUE encapsulation where the source port is automatically selected (based on hash of inner packet) and checksums in the encapsulating UDP header are enabled. Signed-off-by: Tom Herbert --- ip/link_gre.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/ip/link_gre.c b/ip/link_gre.c index fda84d8..cd80333 100644 --- a/ip/link_gre.c +++ b/ip/link_gre.c @@ -30,6 +30,9 @@ static void usage(void) fprintf(stderr, " type { gre | gretap } [ remote ADDR ] [ local ADDR ]\n"); fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"); fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n"); + fprintf(stderr, " [ noencap ] [ encap { fou | gue | none } ]\n"); + fprintf(stderr, " [ encap-sport PORT ] [ encap-dport PORT ]\n"); + fprintf(stderr, " [ [no]encap-csum ] [ [no]encap-csum6 ]\n"); fprintf(stderr, "\n"); fprintf(stderr, "Where: NAME := STRING\n"); fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n"); @@ -62,6 +65,10 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv, __u8 ttl = 0; __u8 tos = 0; int len; + __u16 encaptype = 0; + __u16 encapflags = 0; + __u16 encapsport = 0; + __u16 encapdport = 0; if (!(n->nlmsg_flags & NLM_F_CREATE)) { memset(&req, 0, sizeof(req)); @@ -127,6 +134,15 @@ get_failed: if (greinfo[IFLA_GRE_LINK]) link = rta_getattr_u8(greinfo[IFLA_GRE_LINK]); + + if (greinfo[IFLA_GRE_ENCAP_TYPE]) + encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]); + if (greinfo[IFLA_GRE_ENCAP_FLAGS]) + encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]); + if (greinfo[IFLA_GRE_ENCAP_SPORT]) + encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]); + if (greinfo[IFLA_GRE_ENCAP_DPORT]) + encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]); } while (argc > 0) { @@ -236,6 +252,36 @@ get_failed: tos = uval; } else tos = 1; + } else if (strcmp(*argv, "noencap") == 0) { + encaptype = TUNNEL_ENCAP_NONE; + } else if (strcmp(*argv, "encap") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "fou") == 0) + encaptype = TUNNEL_ENCAP_FOU; + else if (strcmp(*argv, "gue") == 0) + encaptype = TUNNEL_ENCAP_GUE; + else if (strcmp(*argv, "none") == 0) + encaptype = TUNNEL_ENCAP_NONE; + else + invarg("Invalid encap type.", *argv); + } else if (strcmp(*argv, "encap-sport") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "auto") == 0) + encapsport = 0; + else if (get_u16(&encapsport, *argv, 0)) + invarg("Invalid source port.", *argv); + } else if (strcmp(*argv, "encap-dport") == 0) { + NEXT_ARG(); + if (get_u16(&encapdport, *argv, 0)) + invarg("Invalid destination port.", *argv); + } else if (strcmp(*argv, "encap-csum") == 0) { + encapflags |= TUNNEL_ENCAP_FLAG_CSUM; + } else if (strcmp(*argv, "noencap-csum") == 0) { + encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM; + } else if (strcmp(*argv, "encap-udp6-csum") == 0) { + encapflags |= TUNNEL_ENCAP_FLAG_CSUM6; + } else if (strcmp(*argv, "noencap-udp6-csum") == 0) { + encapflags |= ~TUNNEL_ENCAP_FLAG_CSUM6; } else usage(); argc--; argv++; @@ -266,6 +312,11 @@ get_failed: addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1); addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1); + addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype); + addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags); + addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport)); + addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport)); + return 0; } @@ -352,6 +403,44 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) fputs("icsum ", f); if (oflags & GRE_CSUM) fputs("ocsum ", f); + + if (tb[IFLA_GRE_ENCAP_TYPE] && + *(__u16 *)RTA_DATA(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) { + __u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]); + __u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]); + __u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]); + __u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]); + + fputs("encap ", f); + switch (type) { + case TUNNEL_ENCAP_FOU: + fputs("fou ", f); + break; + case TUNNEL_ENCAP_GUE: + fputs("gue ", f); + break; + default: + fputs("unknown ", f); + break; + } + + if (sport == 0) + fputs("encap-sport auto ", f); + else + fprintf(f, "encap-sport %u", sport); + + fprintf(f, "encap-dport %u ", dport); + + if (flags & TUNNEL_ENCAP_FLAG_CSUM) + fputs("encap-csum ", f); + else + fputs("noencap-csum ", f); + + if (flags & TUNNEL_ENCAP_FLAG_CSUM6) + fputs("encap-csum6 ", f); + else + fputs("noencap-csum6 ", f); + } } struct link_util gre_link_util = { -- 2.1.0.rc2.206.gedb03e5