From patchwork Sat Jul 28 07:52:26 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: xeb@mail.ru X-Patchwork-Id: 173838 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 01FBC2C0085 for ; Sat, 28 Jul 2012 17:53:14 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751837Ab2G1Hwb (ORCPT ); Sat, 28 Jul 2012 03:52:31 -0400 Received: from smtp1.mail.ru ([94.100.176.129]:44375 "EHLO smtp1.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751536Ab2G1Hwa (ORCPT ); Sat, 28 Jul 2012 03:52:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.ru; s=mail; h=Content-Transfer-Encoding:Content-Type:Mime-Version:Message-ID:Subject:To:From:Date; bh=wzi76ahxfOHRVixhfWqlkQs7eQSXuqK+bP867fwjVBQ=; b=YZddMgw3U4PfVEmqu9FwjOYaeKI3mTYKk/07tZph0gWINL3BF3YdoDxzOzxw9sydvhnkqz7kNZHPY9ZCEP/tIS8K9iCn0Gj35fBY3x7TdXLbfAi+NIKJSKChrabRdkVV; Received: from [128.71.109.89] (port=54974 helo=comp1) by smtp1.mail.ru with esmtpa (envelope-from ) id 1Sv1p5-0003GM-IU for netdev@vger.kernel.org; Sat, 28 Jul 2012 11:52:27 +0400 Date: Sat, 28 Jul 2012 11:52:26 +0400 From: Dmitry Kozlov To: netdev@vger.kernel.org Subject: [PATCH iproute2 v2] GRE over IPv6 tunnel support Message-ID: <20120728115226.66da9d77@comp1> X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.8; x86_64-pc-linux-gnu) 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 --- Changes: Implemented 'ip link' family of commands to manage ip6gre/ip6gretap tunnels. include/linux/if_arp.h | 15 ++ include/linux/if_tunnel.h | 21 +++ include/linux/ip6_tunnel.h | 18 ++ ip/Makefile | 2 +- ip/ip6tunnel.c | 133 +++++++++++++-- ip/link_gre6.c | 397 ++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 567 insertions(+), 19 deletions(-) + 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, +}; -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h index d2de0f9..9adcc29 100644 --- a/include/linux/if_arp.h +++ b/include/linux/if_arp.h @@ -92,6 +92,7 @@ #define ARPHRD_PHONET 820 /* PhoNet media type */ #define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */ #define ARPHRD_CAIF 822 /* CAIF media type */ +#define ARPHRD_IP6GRE 823 /* GRE over IPv6 */ #define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */ #define ARPHRD_NONE 0xFFFE /* zero header length */ @@ -154,5 +155,19 @@ struct arphdr { }; +#ifdef __KERNEL__ +#include + +static inline struct arphdr *arp_hdr(const struct sk_buff *skb) +{ + return (struct arphdr *)skb_network_header(skb); +} + +static inline int arp_hdr_len(struct net_device *dev) +{ + /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ + return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2; +} +#endif #endif /* _LINUX_IF_ARP_H */ diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h index 8c819b8..8c5035a 100644 --- a/include/linux/if_tunnel.h +++ b/include/linux/if_tunnel.h @@ -4,6 +4,10 @@ #include #include +#ifdef __KERNEL__ +#include +#include +#endif #define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0) #define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1) @@ -71,9 +75,26 @@ enum { IFLA_GRE_TTL, IFLA_GRE_TOS, IFLA_GRE_PMTUDISC, + IFLA_GRE_ENCAP_LIMIT, + IFLA_GRE_FLOWINFO, + IFLA_GRE_FLAGS, __IFLA_GRE_MAX, }; #define IFLA_GRE_MAX (__IFLA_GRE_MAX - 1) +/* VTI-mode i_flags */ +#define VTI_ISVTI 0x0001 + +enum { + IFLA_VTI_UNSPEC, + IFLA_VTI_LINK, + IFLA_VTI_IKEY, + IFLA_VTI_OKEY, + IFLA_VTI_LOCAL, + IFLA_VTI_REMOTE, + __IFLA_VTI_MAX, +}; + +#define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1) #endif /* _IF_TUNNEL_H_ */ diff --git a/include/linux/ip6_tunnel.h b/include/linux/ip6_tunnel.h index bf22b03..1efe2e0 100644 --- a/include/linux/ip6_tunnel.h +++ b/include/linux/ip6_tunnel.h @@ -31,4 +31,22 @@ struct ip6_tnl_parm { struct in6_addr raddr; /* remote tunnel end-point address */ }; +struct ip6_tnl_parm2 { + char name[IFNAMSIZ]; /* name of tunnel device */ + int link; /* ifindex of underlying L2 interface */ + __u8 proto; /* tunnel protocol */ + __u8 encap_limit; /* encapsulation limit for tunnel */ + __u8 hop_limit; /* hop limit for tunnel */ + __be32 flowinfo; /* traffic class and flowlabel for tunnel */ + __u32 flags; /* tunnel flags */ + struct in6_addr laddr; /* local tunnel end-point address */ + struct in6_addr raddr; /* remote tunnel end-point address */ + + __be16 i_flags; + __be16 o_flags; + __be32 i_key; + __be32 o_key; +}; + + #endif diff --git a/ip/Makefile b/ip/Makefile index e029ea1..9c54a0b 100644 --- a/ip/Makefile +++ b/ip/Makefile @@ -3,7 +3,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \ ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o iptuntap.o \ ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o \ iplink_vlan.o link_veth.o link_gre.o iplink_can.o \ - iplink_macvlan.o iplink_macvtap.o ipl2tp.o + iplink_macvlan.o iplink_macvtap.o ipl2tp.o link_gre6.o RTMONOBJ=rtmon.o diff --git a/ip/ip6tunnel.c b/ip/ip6tunnel.c index c9720eb..399a579 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"); @@ -60,12 +61,13 @@ static void usage(void) IPV6_DEFAULT_TNL_ENCAP_LIMIT); fprintf(stderr, " TTL := 0..255 (default=%d)\n", DEFAULT_TNL_HOP_LIMIT); - fprintf(stderr, " TOS := { 0x0..0xff | inherit }\n"); + 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; @@ -199,6 +224,60 @@ 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(); @@ -209,7 +288,7 @@ 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; @@ -227,7 +306,7 @@ 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; @@ -241,8 +320,8 @@ 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) && @@ -260,7 +339,7 @@ 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; @@ -284,7 +363,7 @@ 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'; @@ -309,10 +388,12 @@ 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) @@ -343,7 +424,7 @@ 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); @@ -366,28 +447,44 @@ 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/link_gre6.c b/ip/link_gre6.c new file mode 100644 index 0000000..3ffd3ce --- /dev/null +++ b/ip/link_gre6.c @@ -0,0 +1,397 @@ +/* + * link_gre.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: Herbert Xu + * + */ + +#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, " 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]) {