Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 465 insertions, 0 deletions

diff --git a/ip/link_ip6tnl.c b/ip/link_ip6tnl.c
new file mode 100644
index 0000000..2fcc13e
--- /dev/null
+++ b/ip/link_ip6tnl.c
@@ -0,0 +1,465 @@
+/*
+ * link_ip6tnl.c	ip6tnl 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:	Nicolas Dichtel <nicolas.dichtel@6wind.com>
+ *
+ */
+
+#include <string.h>
+#include <net/if.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#include <linux/ip.h>
+#include <linux/if_tunnel.h>
+#include <linux/ip6_tunnel.h>
+#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 ip6tunnel_print_help(struct link_util *lu, int argc, char **argv,
+				 FILE *f)
+{
+	fprintf(f,
+		"Usage: ... %-6s	[ remote ADDR ]\n"
+		"			[ local ADDR ]\n"
+		"			[ encaplimit ELIM ]\n"
+		"			[ hoplimit HLIM ]\n"
+		"			[ tclass TCLASS ]\n"
+		"			[ flowlabel FLOWLABEL ]\n"
+		"			[ dscp inherit ]\n"
+		"			[ [no]allow-localremote ]\n"
+		"			[ dev PHYS_DEV ]\n"
+		"			[ fwmark MARK ]\n"
+		"			[ external ]\n"
+		"			[ noencap ]\n"
+		"			[ encap { fou | gue | none } ]\n"
+		"			[ encap-sport PORT ]\n"
+		"			[ encap-dport PORT ]\n"
+		"			[ [no]encap-csum ]\n"
+		"			[ [no]encap-csum6 ]\n"
+		"			[ [no]encap-remcsum ]\n"
+		"			[ mode { ip6ip6 | ipip6 | any } ]\n"
+		"\n"
+		"Where:	ADDR	  := IPV6_ADDRESS\n"
+		"	ELIM	  := { none | 0..255 }(default=%d)\n"
+		"	HLIM	  := 0..255 (default=%d)\n"
+		"	TCLASS    := { 0x0..0xff | inherit }\n"
+		"	FLOWLABEL := { 0x0..0xfffff | inherit }\n"
+		"	MARK	  := { 0x0..0xffffffff | inherit }\n",
+		lu->id,
+		IPV6_DEFAULT_TNL_ENCAP_LIMIT, DEFAULT_TNL_HOP_LIMIT);
+}
+
+static int ip6tunnel_parse_opt(struct link_util *lu, int argc, char **argv,
+			       struct nlmsghdr *n)
+{
+	struct ifinfomsg *ifi = NLMSG_DATA(n);
+	struct {
+		struct nlmsghdr n;
+		struct ifinfomsg i;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
+	struct nlmsghdr *answer;
+	struct rtattr *tb[IFLA_MAX + 1];
+	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
+	struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
+	int len;
+	inet_prefix saddr, daddr;
+	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
+	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
+	__u32 flowinfo = 0;
+	__u32 flags = 0;
+	__u8 proto = 0;
+	__u32 link = 0;
+	__u16 encaptype = 0;
+	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
+	__u16 encapsport = 0;
+	__u16 encapdport = 0;
+	__u8 metadata = 0;
+	__u32 fwmark = 0;
+
+	inet_prefix_reset(&saddr);
+	inet_prefix_reset(&daddr);
+
+	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
+		const struct rtattr *rta;
+
+		if (rtnl_talk(&rth, &req.n, &answer) < 0) {
+get_failed:
+			fprintf(stderr,
+				"Failed to get existing tunnel info.\n");
+			return -1;
+		}
+
+		len = answer->nlmsg_len;
+		len -= NLMSG_LENGTH(sizeof(*ifi));
+		if (len < 0)
+			goto get_failed;
+
+		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), 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(iptuninfo, IFLA_IPTUN_MAX,
+				    linkinfo[IFLA_INFO_DATA]);
+
+		rta = iptuninfo[IFLA_IPTUN_LOCAL];
+		if (rta && get_addr_rta(&saddr, rta, AF_INET6))
+			goto get_failed;
+
+		rta = iptuninfo[IFLA_IPTUN_REMOTE];
+		if (rta && get_addr_rta(&daddr, rta, AF_INET6))
+			goto get_failed;
+
+		if (iptuninfo[IFLA_IPTUN_TTL])
+			hop_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);
+
+		if (iptuninfo[IFLA_IPTUN_ENCAP_LIMIT])
+			encap_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_ENCAP_LIMIT]);
+
+		if (iptuninfo[IFLA_IPTUN_FLOWINFO])
+			flowinfo = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLOWINFO]);
+
+		if (iptuninfo[IFLA_IPTUN_FLAGS])
+			flags = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLAGS]);
+
+		if (iptuninfo[IFLA_IPTUN_LINK])
+			link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);
+
+		if (iptuninfo[IFLA_IPTUN_PROTO])
+			proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]);
+		if (iptuninfo[IFLA_IPTUN_COLLECT_METADATA])
+			metadata = 1;
+
+		if (iptuninfo[IFLA_IPTUN_FWMARK])
+			fwmark = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FWMARK]);
+
+		free(answer);
+	}
+
+	while (argc > 0) {
+		if (strcmp(*argv, "mode") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "ipv6/ipv6") == 0 ||
+			    strcmp(*argv, "ip6ip6") == 0)
+				proto = IPPROTO_IPV6;
+			else if (strcmp(*argv, "ip/ipv6") == 0 ||
+				 strcmp(*argv, "ipv4/ipv6") == 0 ||
+				 strcmp(*argv, "ipip6") == 0 ||
+				 strcmp(*argv, "ip4ip6") == 0)
+				proto = IPPROTO_IPIP;
+			else if (strcmp(*argv, "any/ipv6") == 0 ||
+				 strcmp(*argv, "any") == 0)
+				proto = 0;
+			else
+				invarg("Cannot guess tunnel mode.", *argv);
+		} else if (strcmp(*argv, "remote") == 0) {
+			NEXT_ARG();
+			get_addr(&daddr, *argv, AF_INET6);
+		} else if (strcmp(*argv, "local") == 0) {
+			NEXT_ARG();
+			get_addr(&saddr, *argv, AF_INET6);
+		} else if (matches(*argv, "dev") == 0) {
+			NEXT_ARG();
+			link = ll_name_to_index(*argv);
+			if (!link)
+				exit(nodev(*argv));
+		} else if (strcmp(*argv, "ttl") == 0 ||
+			   strcmp(*argv, "hoplimit") == 0 ||
+			   strcmp(*argv, "hlim") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "inherit") != 0) {
+				if (get_u8(&hop_limit, *argv, 0))
+					invarg("invalid HLIM\n", *argv);
+			} else
+				hop_limit = 0;
+		} else if (strcmp(*argv, "encaplimit") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "none") == 0) {
+				flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
+			} else {
+				__u8 uval;
+
+				if (get_u8(&uval, *argv, 0) < -1)
+					invarg("invalid ELIM", *argv);
+				encap_limit = uval;
+				flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
+			}
+		} else if (strcmp(*argv, "tos") == 0 ||
+			   strcmp(*argv, "tclass") == 0 ||
+			   strcmp(*argv, "tc") == 0 ||
+			   matches(*argv, "dsfield") == 0) {
+			__u8 uval;
+
+			NEXT_ARG();
+			flowinfo &= ~IP6_FLOWINFO_TCLASS;
+			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();
+			flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
+			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 if (strcmp(*argv, "fwmark") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "inherit") == 0) {
+				flags |= IP6_TNL_F_USE_ORIG_FWMARK;
+				fwmark = 0;
+			} else {
+				if (get_u32(&fwmark, *argv, 0))
+					invarg("invalid fwmark\n", *argv);
+				flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
+			}
+		} else if (strcmp(*argv, "allow-localremote") == 0) {
+			flags |= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
+		} else if (strcmp(*argv, "noallow-localremote") == 0) {
+			flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
+		} 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 if (strcmp(*argv, "encap-remcsum") == 0) {
+			encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
+		} else if (strcmp(*argv, "noencap-remcsum") == 0) {
+			encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
+		} else if (strcmp(*argv, "external") == 0) {
+			metadata = 1;
+		} else {
+			ip6tunnel_print_help(lu, argc, argv, stderr);
+			return -1;
+		}
+		argc--, argv++;
+	}
+
+	addattr8(n, 1024, IFLA_IPTUN_PROTO, proto);
+	if (metadata) {
+		addattr_l(n, 1024, IFLA_IPTUN_COLLECT_METADATA, NULL, 0);
+		return 0;
+	}
+
+	if (is_addrtype_inet_not_unspec(&saddr)) {
+		addattr_l(n, 1024, IFLA_IPTUN_LOCAL,
+			  saddr.data, saddr.bytelen);
+	}
+	if (is_addrtype_inet_not_unspec(&daddr)) {
+		addattr_l(n, 1024, IFLA_IPTUN_REMOTE,
+			  daddr.data, daddr.bytelen);
+	}
+	addattr8(n, 1024, IFLA_IPTUN_TTL, hop_limit);
+	addattr8(n, 1024, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
+	addattr32(n, 1024, IFLA_IPTUN_FLOWINFO, flowinfo);
+	addattr32(n, 1024, IFLA_IPTUN_FLAGS, flags);
+	addattr32(n, 1024, IFLA_IPTUN_LINK, link);
+	addattr32(n, 1024, IFLA_IPTUN_FWMARK, fwmark);
+
+	addattr16(n, 1024, IFLA_IPTUN_ENCAP_TYPE, encaptype);
+	addattr16(n, 1024, IFLA_IPTUN_ENCAP_FLAGS, encapflags);
+	addattr16(n, 1024, IFLA_IPTUN_ENCAP_SPORT, htons(encapsport));
+	addattr16(n, 1024, IFLA_IPTUN_ENCAP_DPORT, htons(encapdport));
+
+	return 0;
+}
+
+static void ip6tunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+	char s2[64];
+	__u32 flags = 0;
+	__u32 flowinfo = 0;
+	__u8 ttl = 0;
+
+	if (!tb)
+		return;
+
+	if (tb[IFLA_IPTUN_COLLECT_METADATA]) {
+		print_bool(PRINT_ANY, "external", "external ", true);
+	}
+
+	if (tb[IFLA_IPTUN_FLAGS])
+		flags = rta_getattr_u32(tb[IFLA_IPTUN_FLAGS]);
+
+	if (tb[IFLA_IPTUN_FLOWINFO])
+		flowinfo = rta_getattr_u32(tb[IFLA_IPTUN_FLOWINFO]);
+
+	if (tb[IFLA_IPTUN_PROTO]) {
+		switch (rta_getattr_u8(tb[IFLA_IPTUN_PROTO])) {
+		case IPPROTO_IPIP:
+			print_string(PRINT_ANY, "proto", "%s ", "ipip6");
+			break;
+		case IPPROTO_IPV6:
+			print_string(PRINT_ANY, "proto", "%s ", "ip6ip6");
+			break;
+		case 0:
+			print_string(PRINT_ANY, "proto", "%s ", "any");
+			break;
+		}
+	}
+
+	tnl_print_endpoint("remote", tb[IFLA_IPTUN_REMOTE], AF_INET6);
+	tnl_print_endpoint("local", tb[IFLA_IPTUN_LOCAL], AF_INET6);
+
+	if (tb[IFLA_IPTUN_LINK]) {
+		__u32 link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
+
+		if (link) {
+			print_string(PRINT_ANY, "link", "dev %s ",
+				     ll_index_to_name(link));
+		}
+	}
+
+	if (tb[IFLA_IPTUN_TTL])
+		ttl = rta_getattr_u8(tb[IFLA_IPTUN_TTL]);
+	if (is_json_context() || ttl)
+		print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl);
+	else
+		print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");
+
+	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
+		print_bool(PRINT_ANY,
+			   "ip6_tnl_f_ign_encap_limit",
+			   "encaplimit none ",
+			   true);
+	} else if (tb[IFLA_IPTUN_ENCAP_LIMIT]) {
+		__u8 val = rta_getattr_u8(tb[IFLA_IPTUN_ENCAP_LIMIT]);
+
+		print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
+	}
+
+	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
+		print_bool(PRINT_ANY,
+			   "ip6_tnl_f_use_orig_tclass",
+			   "tclass inherit ",
+			   true);
+	} else if (tb[IFLA_IPTUN_FLOWINFO]) {
+		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
+
+		snprintf(s2, sizeof(s2), "0x%02x", val);
+		print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
+	}
+
+	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
+		print_bool(PRINT_ANY,
+			   "ip6_tnl_f_use_orig_flowlabel",
+			   "flowlabel inherit ",
+			   true);
+	} else if (tb[IFLA_IPTUN_FLOWINFO]) {
+		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);
+
+		snprintf(s2, sizeof(s2), "0x%05x", val);
+		print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
+	}
+
+	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
+		print_bool(PRINT_ANY,
+			   "ip6_tnl_f_rcv_dscp_copy",
+			   "dscp inherit ",
+			   true);
+
+	if (flags & IP6_TNL_F_MIP6_DEV)
+		print_bool(PRINT_ANY, "ip6_tnl_f_mip6_dev", "mip6 ", true);
+
+	if (flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
+		print_bool(PRINT_ANY,
+			   "ip6_tnl_f_allow_local_remote",
+			   "allow-localremote ",
+			   true);
+
+	if (flags & IP6_TNL_F_USE_ORIG_FWMARK) {
+		print_bool(PRINT_ANY,
+			   "ip6_tnl_f_use_orig_fwmark",
+			   "fwmark inherit ",
+			   true);
+	} else if (tb[IFLA_IPTUN_FWMARK]) {
+		__u32 fwmark = rta_getattr_u32(tb[IFLA_IPTUN_FWMARK]);
+
+		if (fwmark) {
+			print_0xhex(PRINT_ANY,
+				    "fwmark", "fwmark %#llx ", fwmark);
+		}
+	}
+
+	tnl_print_encap(tb,
+			IFLA_IPTUN_ENCAP_TYPE,
+			IFLA_IPTUN_ENCAP_FLAGS,
+			IFLA_IPTUN_ENCAP_SPORT,
+			IFLA_IPTUN_ENCAP_DPORT);
+}
+
+struct link_util ip6tnl_link_util = {
+	.id = "ip6tnl",
+	.maxattr = IFLA_IPTUN_MAX,
+	.parse_opt = ip6tunnel_parse_opt,
+	.print_opt = ip6tunnel_print_opt,
+	.print_help = ip6tunnel_print_help,
+};