From patchwork Sat Sep 28 07:32:51 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: xeb@mail.ru X-Patchwork-Id: 278719 X-Patchwork-Delegate: shemminger@vyatta.com Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 9F8662C009E for ; Sat, 28 Sep 2013 17:44:03 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752445Ab3I1Hn7 (ORCPT ); Sat, 28 Sep 2013 03:43:59 -0400 Received: from fallback1.mail.ru ([94.100.176.18]:40746 "EHLO fallback1.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751814Ab3I1Hn5 (ORCPT ); Sat, 28 Sep 2013 03:43:57 -0400 X-Greylist: delayed 631 seconds by postgrey-1.27 at vger.kernel.org; Sat, 28 Sep 2013 03:43:56 EDT Received: from smtp49.i.mail.ru (smtp49.i.mail.ru [94.100.177.109]) by fallback1.mail.ru (mPOP.Fallback_MX) with ESMTP id 2DA962969D23 for ; Sat, 28 Sep 2013 11:33:21 +0400 (MSK) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.ru; s=mail2; h=Content-Transfer-Encoding:Content-Type:Mime-Version:Message-ID:Subject:Cc:To:From:Date; bh=xCL5qSNgkINm5Ze9C1pKzas53cajDI4rB87u6TvJR9I=; b=u0vETq7Cd8z+SCNOZiuateWEVFviMMyl54nF1Whv7WkF/jaE6p7s08UCOy0ly96ZdUdNnmFpgnTFMci5aRd5OSEYliYW7LvOAo3gFNIrZpIo7bfyjofKX1+2Be9l7eYRDUin/9HxG984vw0Z5qp27KhSIzjnJC/TasZCYUag5S8=; Received: from [109.195.51.211] (port=50542 helo=comp1) by smtp49.i.mail.ru with esmtpa (envelope-from ) id 1VPp1K-0002QC-Ag; Sat, 28 Sep 2013 11:32:54 +0400 Date: Sat, 28 Sep 2013 11:32:51 +0400 From: Dmitry Kozlov To: Hannes Frederic Sowa Cc: "Templin, Fred L" , Stephen Hemminger , netdev@vger.kernel.org Subject: [PATCH RESEND] iproute2: GRE over IPv6 tunnel support. Message-ID: <20130928113251.75738a49@comp1> Mime-Version: 1.0 X-Spam: Not detected X-Mras: Ok Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org GRE over IPv6 tunnel support. Signed-off-by: Dmitry Kozlov --- ip/Makefile | 3 +- ip/ip6tunnel.c | 131 ++++++++++++++++--- ip/iplink.c | 7 +- ip/link_gre6.c | 398 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 516 insertions(+), 23 deletions(-) create mode 100644 ip/link_gre6.c diff --git a/ip/Makefile b/ip/Makefile index 48bd4a1..f10d22f 100644 --- a/ip/Makefile +++ b/ip/Makefile @@ -5,7 +5,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \ iplink_vlan.o link_veth.o link_gre.o iplink_can.o \ iplink_macvlan.o iplink_macvtap.o ipl2tp.o link_vti.o \ iplink_vxlan.o tcp_metrics.o iplink_ipoib.o ipnetconf.o link_ip6tnl.o \ - link_iptnl.o + link_iptnl.o link_gre6.o RTMONOBJ=rtmon.o @@ -23,7 +23,6 @@ all: $(TARGETS) $(SCRIPTS) ip: $(IPOBJ) $(LIBNETLINK) - rtmon: $(RTMONOBJ) install: all diff --git a/ip/ip6tunnel.c b/ip/ip6tunnel.c index 216e982..463be42 100644 --- a/ip/ip6tunnel.c +++ b/ip/ip6tunnel.c @@ -48,11 +48,12 @@ static void usage(void) __attribute__((noreturn)); static void usage(void) { fprintf(stderr, "Usage: ip -f inet6 tunnel { add | change | del | show } [ NAME ]\n"); - fprintf(stderr, " [ mode { ip6ip6 | ipip6 | any } ]\n"); + fprintf(stderr, " [ mode { ip6ip6 | ipip6 | ip6gre | any } ]\n"); fprintf(stderr, " [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n"); fprintf(stderr, " [ encaplimit ELIM ]\n"); fprintf(stderr ," [ hoplimit TTL ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n"); fprintf(stderr, " [ dscp inherit ]\n"); + fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"); fprintf(stderr, "\n"); fprintf(stderr, "Where: NAME := STRING\n"); fprintf(stderr, " ADDR := IPV6_ADDRESS\n"); @@ -62,10 +63,11 @@ static void usage(void) DEFAULT_TNL_HOP_LIMIT); fprintf(stderr, " TCLASS := { 0x0..0xff | inherit }\n"); fprintf(stderr, " FLOWLABEL := { 0x0..0xfffff | inherit }\n"); + fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n"); exit(-1); } -static void print_tunnel(struct ip6_tnl_parm *p) +static void print_tunnel(struct ip6_tnl_parm2 *p) { char remote[64]; char local[64]; @@ -104,9 +106,29 @@ static void print_tunnel(struct ip6_tnl_parm *p) if (p->flags & IP6_TNL_F_RCV_DSCP_COPY) printf(" dscp inherit"); + + if (p->proto == IPPROTO_GRE) { + if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key) + printf(" key %u", ntohl(p->i_key)); + else if ((p->i_flags|p->o_flags)&GRE_KEY) { + if (p->i_flags&GRE_KEY) + printf(" ikey %u ", ntohl(p->i_key)); + if (p->o_flags&GRE_KEY) + printf(" okey %u ", ntohl(p->o_key)); + } + + if (p->i_flags&GRE_SEQ) + printf("%s Drop packets out of sequence.\n", _SL_); + if (p->i_flags&GRE_CSUM) + printf("%s Checksum in received packet is required.", _SL_); + if (p->o_flags&GRE_SEQ) + printf("%s Sequence packets on output.", _SL_); + if (p->o_flags&GRE_CSUM) + printf("%s Checksum output packets.", _SL_); + } } -static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm *p) +static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm2 *p) { int count = 0; char medium[IFNAMSIZ]; @@ -124,6 +146,9 @@ static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm *p) strcmp(*argv, "ipip6") == 0 || strcmp(*argv, "ip4ip6") == 0) p->proto = IPPROTO_IPIP; + else if (strcmp(*argv, "ip6gre") == 0 || + strcmp(*argv, "gre/ipv6") == 0) + p->proto = IPPROTO_GRE; else if (strcmp(*argv, "any/ipv6") == 0 || strcmp(*argv, "any") == 0) p->proto = 0; @@ -202,6 +227,60 @@ static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm *p) if (strcmp(*argv, "inherit") != 0) invarg("not inherit", *argv); p->flags |= IP6_TNL_F_RCV_DSCP_COPY; + } else if (strcmp(*argv, "key") == 0) { + unsigned uval; + NEXT_ARG(); + p->i_flags |= GRE_KEY; + p->o_flags |= GRE_KEY; + if (strchr(*argv, '.')) + p->i_key = p->o_key = get_addr32(*argv); + else { + if (get_unsigned(&uval, *argv, 0)<0) { + fprintf(stderr, "invalid value of \"key\"\n"); + exit(-1); + } + p->i_key = p->o_key = htonl(uval); + } + } else if (strcmp(*argv, "ikey") == 0) { + unsigned uval; + NEXT_ARG(); + p->i_flags |= GRE_KEY; + if (strchr(*argv, '.')) + p->i_key = get_addr32(*argv); + else { + if (get_unsigned(&uval, *argv, 0)<0) { + fprintf(stderr, "invalid value of \"ikey\"\n"); + exit(-1); + } + p->i_key = htonl(uval); + } + } else if (strcmp(*argv, "okey") == 0) { + unsigned uval; + NEXT_ARG(); + p->o_flags |= GRE_KEY; + if (strchr(*argv, '.')) + p->o_key = get_addr32(*argv); + else { + if (get_unsigned(&uval, *argv, 0)<0) { + fprintf(stderr, "invalid value of \"okey\"\n"); + exit(-1); + } + p->o_key = htonl(uval); + } + } else if (strcmp(*argv, "seq") == 0) { + p->i_flags |= GRE_SEQ; + p->o_flags |= GRE_SEQ; + } else if (strcmp(*argv, "iseq") == 0) { + p->i_flags |= GRE_SEQ; + } else if (strcmp(*argv, "oseq") == 0) { + p->o_flags |= GRE_SEQ; + } else if (strcmp(*argv, "csum") == 0) { + p->i_flags |= GRE_CSUM; + p->o_flags |= GRE_CSUM; + } else if (strcmp(*argv, "icsum") == 0) { + p->i_flags |= GRE_CSUM; + } else if (strcmp(*argv, "ocsum") == 0) { + p->o_flags |= GRE_CSUM; } else { if (strcmp(*argv, "name") == 0) { NEXT_ARG(); @@ -212,7 +291,7 @@ static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm *p) duparg2("name", *argv); strncpy(p->name, *argv, IFNAMSIZ - 1); if (cmd == SIOCCHGTUNNEL && count == 0) { - struct ip6_tnl_parm old_p; + struct ip6_tnl_parm2 old_p; memset(&old_p, 0, sizeof(old_p)); if (tnl_get_ioctl(*argv, &old_p)) return -1; @@ -230,7 +309,7 @@ static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm *p) return 0; } -static void ip6_tnl_parm_init(struct ip6_tnl_parm *p, int apply_default) +static void ip6_tnl_parm_init(struct ip6_tnl_parm2 *p, int apply_default) { memset(p, 0, sizeof(*p)); p->proto = IPPROTO_IPV6; @@ -244,8 +323,8 @@ static void ip6_tnl_parm_init(struct ip6_tnl_parm *p, int apply_default) * @p1: user specified parameter * @p2: database entry */ -static int ip6_tnl_parm_match(const struct ip6_tnl_parm *p1, - const struct ip6_tnl_parm *p2) +static int ip6_tnl_parm_match(const struct ip6_tnl_parm2 *p1, + const struct ip6_tnl_parm2 *p2) { return ((!p1->link || p1->link == p2->link) && (!p1->name[0] || strcmp(p1->name, p2->name) == 0) && @@ -263,7 +342,7 @@ static int ip6_tnl_parm_match(const struct ip6_tnl_parm *p1, (!p1->flags || (p1->flags & p2->flags))); } -static int do_tunnels_list(struct ip6_tnl_parm *p) +static int do_tunnels_list(struct ip6_tnl_parm2 *p) { char buf[512]; int err = -1; @@ -287,7 +366,7 @@ static int do_tunnels_list(struct ip6_tnl_parm *p) rx_fifo, rx_frame, tx_bytes, tx_packets, tx_errs, tx_drops, tx_fifo, tx_colls, tx_carrier, rx_multi; - struct ip6_tnl_parm p1; + struct ip6_tnl_parm2 p1; char *ptr; buf[sizeof(buf) - 1] = '\0'; @@ -312,10 +391,12 @@ static int do_tunnels_list(struct ip6_tnl_parm *p) fprintf(stderr, "Failed to get type of \"%s\"\n", name); continue; } - if (type != ARPHRD_TUNNEL6) + if (type != ARPHRD_TUNNEL6 && type != ARPHRD_IP6GRE) continue; memset(&p1, 0, sizeof(p1)); ip6_tnl_parm_init(&p1, 0); + if (type == ARPHRD_IP6GRE) + p1.proto = IPPROTO_GRE; strcpy(p1.name, name); p1.link = ll_name_to_index(p1.name); if (p1.link == 0) @@ -346,7 +427,7 @@ static int do_tunnels_list(struct ip6_tnl_parm *p) static int do_show(int argc, char **argv) { - struct ip6_tnl_parm p; + struct ip6_tnl_parm2 p; ll_init_map(&rth); ip6_tnl_parm_init(&p, 0); @@ -369,28 +450,44 @@ static int do_show(int argc, char **argv) static int do_add(int cmd, int argc, char **argv) { - struct ip6_tnl_parm p; + struct ip6_tnl_parm2 p; ip6_tnl_parm_init(&p, 1); if (parse_args(argc, argv, cmd, &p) < 0) return -1; - return tnl_add_ioctl(cmd, - cmd == SIOCCHGTUNNEL && p.name[0] ? - p.name : "ip6tnl0", p.name, &p); + switch (p.proto) { + case IPPROTO_IPIP: + case IPPROTO_IPV6: + return tnl_add_ioctl(cmd, "ip6tnl0", p.name, &p); + case IPPROTO_GRE: + return tnl_add_ioctl(cmd, "ip6gre0", p.name, &p); + default: + fprintf(stderr, "cannot determine tunnel mode (ip6ip6, ipip6 or gre)\n"); + } + return -1; } static int do_del(int argc, char **argv) { - struct ip6_tnl_parm p; + struct ip6_tnl_parm2 p; ip6_tnl_parm_init(&p, 1); if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0) return -1; - return tnl_del_ioctl(p.name[0] ? p.name : "ip6tnl0", p.name, &p); + switch (p.proto) { + case IPPROTO_IPIP: + case IPPROTO_IPV6: + return tnl_del_ioctl("ip6tnl0", p.name, &p); + case IPPROTO_GRE: + return tnl_del_ioctl("ip6gre0", p.name, &p); + default: + return tnl_del_ioctl(p.name, p.name, &p); + } + return -1; } int do_ip6tunnel(int argc, char **argv) diff --git a/ip/iplink.c b/ip/iplink.c index ada9d42..16cb6fe 100644 --- a/ip/iplink.c +++ b/ip/iplink.c @@ -85,7 +85,8 @@ void iplink_usage(void) if (iplink_have_newlink()) { fprintf(stderr, "\n"); fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can |\n"); - fprintf(stderr, " bridge | ipoib | ip6tnl | ipip | sit | vxlan }\n"); + fprintf(stderr, " bridge | ipoib | ip6tnl | ipip | sit | vxlan |\n"); + fprintf(stderr, " gre | gretap | ip6gre | ip6gretap }\n"); } exit(-1); } @@ -243,7 +244,7 @@ static int iplink_parse_vf(int vf, int *argcp, char ***argvp, } ivt.vf = vf; addattr_l(&req->n, sizeof(*req), IFLA_VF_TX_RATE, &ivt, sizeof(ivt)); - + } else if (matches(*argv, "spoofchk") == 0) { struct ifla_vf_spoofchk ivs; NEXT_ARG(); @@ -286,7 +287,6 @@ static int iplink_parse_vf(int vf, int *argcp, char ***argvp, return 0; } - int iplink_parse(int argc, char **argv, struct iplink_req *req, char **name, char **type, char **link, char **dev, int *group) { @@ -811,7 +811,6 @@ static int set_address(struct ifreq *ifr, int brd) return 0; } - static int do_set(int argc, char **argv) { char *dev = NULL; diff --git a/ip/link_gre6.c b/ip/link_gre6.c new file mode 100644 index 0000000..4c9c536 --- /dev/null +++ b/ip/link_gre6.c @@ -0,0 +1,398 @@ +/* + * link_gre6.c gre driver module + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: Dmitry Kozlov + * + */ + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" +#include "tunnel.h" + +#define IP6_FLOWINFO_TCLASS htonl(0x0FF00000) +#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF) + +#define DEFAULT_TNL_HOP_LIMIT (64) + +static void usage(void) __attribute__((noreturn)); +static void usage(void) +{ + fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n"); + fprintf(stderr, " type { ip6gre | ip6gretap } [ remote ADDR ] [ local ADDR ]\n"); + fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"); + fprintf(stderr, " [ hoplimit TTL ] [ encaplimit ELIM ]\n"); + fprintf(stderr, " [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n"); + fprintf(stderr, " [ dscp inherit ] [ dev PHYS_DEV ]\n"); + fprintf(stderr, "\n"); + fprintf(stderr, "Where: NAME := STRING\n"); + fprintf(stderr, " ADDR := IPV6_ADDRESS\n"); + fprintf(stderr, " TTL := { 0..255 } (default=%d)\n", + DEFAULT_TNL_HOP_LIMIT); + fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n"); + fprintf(stderr, " ELIM := { none | 0..255 }(default=%d)\n", + IPV6_DEFAULT_TNL_ENCAP_LIMIT); + fprintf(stderr, " TCLASS := { 0x0..0xff | inherit }\n"); + fprintf(stderr, " FLOWLABEL := { 0x0..0xfffff | inherit }\n"); + exit(-1); +} + +static int gre_parse_opt(struct link_util *lu, int argc, char **argv, + struct nlmsghdr *n) +{ + struct { + struct nlmsghdr n; + struct ifinfomsg i; + char buf[1024]; + } req; + struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); + struct rtattr *tb[IFLA_MAX + 1]; + struct rtattr *linkinfo[IFLA_INFO_MAX+1]; + struct rtattr *greinfo[IFLA_GRE_MAX + 1]; + __u16 iflags = 0; + __u16 oflags = 0; + unsigned ikey = 0; + unsigned okey = 0; + struct in6_addr raddr = IN6ADDR_ANY_INIT; + struct in6_addr laddr = IN6ADDR_ANY_INIT; + unsigned link = 0; + unsigned flowinfo = 0; + unsigned flags = 0; + __u8 hop_limit = DEFAULT_TNL_HOP_LIMIT; + __u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT; + int len; + + if (!(n->nlmsg_flags & NLM_F_CREATE)) { + memset(&req, 0, sizeof(req)); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)); + req.n.nlmsg_flags = NLM_F_REQUEST; + req.n.nlmsg_type = RTM_GETLINK; + req.i.ifi_family = preferred_family; + req.i.ifi_index = ifi->ifi_index; + + if (rtnl_talk(&rth, &req.n, 0, 0, &req.n) < 0) { +get_failed: + fprintf(stderr, + "Failed to get existing tunnel info.\n"); + return -1; + } + + len = req.n.nlmsg_len; + len -= NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) + goto get_failed; + + parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len); + + if (!tb[IFLA_LINKINFO]) + goto get_failed; + + parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); + + if (!linkinfo[IFLA_INFO_DATA]) + goto get_failed; + + parse_rtattr_nested(greinfo, IFLA_GRE_MAX, + linkinfo[IFLA_INFO_DATA]); + + if (greinfo[IFLA_GRE_IKEY]) + ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]); + + if (greinfo[IFLA_GRE_OKEY]) + okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]); + + if (greinfo[IFLA_GRE_IFLAGS]) + iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]); + + if (greinfo[IFLA_GRE_OFLAGS]) + oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]); + + if (greinfo[IFLA_GRE_LOCAL]) + memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr)); + + if (greinfo[IFLA_GRE_REMOTE]) + memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr)); + + if (greinfo[IFLA_GRE_TTL]) + hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]); + + if (greinfo[IFLA_GRE_LINK]) + link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]); + + if (greinfo[IFLA_GRE_ENCAP_LIMIT]) + encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]); + + if (greinfo[IFLA_GRE_FLOWINFO]) + flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]); + + if (greinfo[IFLA_GRE_FLAGS]) + flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]); + } + + while (argc > 0) { + if (!matches(*argv, "key")) { + unsigned uval; + + NEXT_ARG(); + iflags |= GRE_KEY; + oflags |= GRE_KEY; + if (strchr(*argv, '.')) + uval = get_addr32(*argv); + else { + if (get_unsigned(&uval, *argv, 0) < 0) { + fprintf(stderr, + "Invalid value for \"key\"\n"); + exit(-1); + } + uval = htonl(uval); + } + + ikey = okey = uval; + } else if (!matches(*argv, "ikey")) { + unsigned uval; + + NEXT_ARG(); + iflags |= GRE_KEY; + if (strchr(*argv, '.')) + uval = get_addr32(*argv); + else { + if (get_unsigned(&uval, *argv, 0)<0) { + fprintf(stderr, "invalid value of \"ikey\"\n"); + exit(-1); + } + uval = htonl(uval); + } + ikey = uval; + } else if (!matches(*argv, "okey")) { + unsigned uval; + + NEXT_ARG(); + oflags |= GRE_KEY; + if (strchr(*argv, '.')) + uval = get_addr32(*argv); + else { + if (get_unsigned(&uval, *argv, 0)<0) { + fprintf(stderr, "invalid value of \"okey\"\n"); + exit(-1); + } + uval = htonl(uval); + } + okey = uval; + } else if (!matches(*argv, "seq")) { + iflags |= GRE_SEQ; + oflags |= GRE_SEQ; + } else if (!matches(*argv, "iseq")) { + iflags |= GRE_SEQ; + } else if (!matches(*argv, "oseq")) { + oflags |= GRE_SEQ; + } else if (!matches(*argv, "csum")) { + iflags |= GRE_CSUM; + oflags |= GRE_CSUM; + } else if (!matches(*argv, "icsum")) { + iflags |= GRE_CSUM; + } else if (!matches(*argv, "ocsum")) { + oflags |= GRE_CSUM; + } else if (!matches(*argv, "remote")) { + inet_prefix addr; + NEXT_ARG(); + get_prefix(&addr, *argv, preferred_family); + if (addr.family == AF_UNSPEC) + invarg("\"remote\" address family is AF_UNSPEC", *argv); + memcpy(&raddr, &addr.data, sizeof(raddr)); + } else if (!matches(*argv, "local")) { + inet_prefix addr; + NEXT_ARG(); + get_prefix(&addr, *argv, preferred_family); + if (addr.family == AF_UNSPEC) + invarg("\"local\" address family is AF_UNSPEC", *argv); + memcpy(&laddr, &addr.data, sizeof(laddr)); + } else if (!matches(*argv, "dev")) { + NEXT_ARG(); + link = if_nametoindex(*argv); + if (link == 0) + exit(-1); + } else if (!matches(*argv, "ttl") || + !matches(*argv, "hoplimit")) { + __u8 uval; + NEXT_ARG(); + if (get_u8(&uval, *argv, 0)) + invarg("invalid TTL", *argv); + hop_limit = uval; + } else if (!matches(*argv, "tos") || + !matches(*argv, "tclass") || + !matches(*argv, "dsfield")) { + __u8 uval; + NEXT_ARG(); + if (strcmp(*argv, "inherit") == 0) + flags |= IP6_TNL_F_USE_ORIG_TCLASS; + else { + if (get_u8(&uval, *argv, 16)) + invarg("invalid TClass", *argv); + flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS; + flags &= ~IP6_TNL_F_USE_ORIG_TCLASS; + } + } else if (strcmp(*argv, "flowlabel") == 0 || + strcmp(*argv, "fl") == 0) { + __u32 uval; + NEXT_ARG(); + if (strcmp(*argv, "inherit") == 0) + flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL; + else { + if (get_u32(&uval, *argv, 16)) + invarg("invalid Flowlabel", *argv); + if (uval > 0xFFFFF) + invarg("invalid Flowlabel", *argv); + flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL; + flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL; + } + } else if (strcmp(*argv, "dscp") == 0) { + NEXT_ARG(); + if (strcmp(*argv, "inherit") != 0) + invarg("not inherit", *argv); + flags |= IP6_TNL_F_RCV_DSCP_COPY; + } else + usage(); + argc--; argv++; + } + + addattr32(n, 1024, IFLA_GRE_IKEY, ikey); + addattr32(n, 1024, IFLA_GRE_OKEY, okey); + addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2); + addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2); + addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr)); + addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr)); + if (link) + addattr32(n, 1024, IFLA_GRE_LINK, link); + addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1); + addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1); + addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4); + addattr_l(n, 1024, IFLA_GRE_FLAGS, &flowinfo, 4); + + return 0; +} + +static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) +{ + char s1[1024]; + char s2[64]; + const char *local = "any"; + const char *remote = "any"; + unsigned iflags = 0; + unsigned oflags = 0; + unsigned flags = 0; + unsigned flowinfo = 0; + struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT; + + if (!tb) + return; + + if (tb[IFLA_GRE_FLAGS]) + flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]); + + if (tb[IFLA_GRE_FLOWINFO]) + flags = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]); + + if (tb[IFLA_GRE_REMOTE]) { + struct in6_addr addr; + memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr)); + + if (memcmp(&addr, &in6_addr_any, sizeof(addr))) + remote = format_host(AF_INET6, sizeof(addr), &addr, s1, sizeof(s1)); + } + + fprintf(f, "remote %s ", remote); + + if (tb[IFLA_GRE_LOCAL]) { + struct in6_addr addr; + memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr)); + + if (memcmp(&addr, &in6_addr_any, sizeof(addr))) + local = format_host(AF_INET6, sizeof(addr), &addr, s1, sizeof(s1)); + } + + fprintf(f, "local %s ", local); + + if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) { + unsigned link = rta_getattr_u32(tb[IFLA_GRE_LINK]); + const char *n = if_indextoname(link, s2); + + if (n) + fprintf(f, "dev %s ", n); + else + fprintf(f, "dev %u ", link); + } + + if (tb[IFLA_GRE_TTL] && rta_getattr_u8(tb[IFLA_GRE_TTL])) + fprintf(f, "hoplimit %d ", rta_getattr_u8(tb[IFLA_GRE_TTL])); + + if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) + fprintf(f, "encaplimit none "); + else if (tb[IFLA_GRE_ENCAP_LIMIT]) { + int encap_limit = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]); + + fprintf(f, "encaplimit %d ", encap_limit); + } + + if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) + fprintf(f, "flowlabel inherit "); + else + fprintf(f, "flowlabel 0x%05x ", ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL)); + + if (flags & IP6_TNL_F_RCV_DSCP_COPY) + fprintf(f, "dscp inherit "); + + if (tb[IFLA_GRE_IFLAGS]) + iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]); + + if (tb[IFLA_GRE_OFLAGS]) + oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]); + + if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) { + inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2)); + fprintf(f, "ikey %s ", s2); + } + + if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) { + inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2)); + fprintf(f, "okey %s ", s2); + } + + if (iflags & GRE_SEQ) + fputs("iseq ", f); + if (oflags & GRE_SEQ) + fputs("oseq ", f); + if (iflags & GRE_CSUM) + fputs("icsum ", f); + if (oflags & GRE_CSUM) + fputs("ocsum ", f); +} + +struct link_util ip6gre_link_util = { + .id = "ip6gre", + .maxattr = IFLA_GRE_MAX, + .parse_opt = gre_parse_opt, + .print_opt = gre_print_opt, +}; + +struct link_util ip6gretap_link_util = { + .id = "ip6gretap", + .maxattr = IFLA_GRE_MAX, + .parse_opt = gre_parse_opt, + .print_opt = gre_print_opt, +};