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Diffstat (limited to 'ip/link_gre.c')
-rw-r--r--ip/link_gre.c337
1 files changed, 231 insertions, 106 deletions
diff --git a/ip/link_gre.c b/ip/link_gre.c
index c85741f5..9ea2970c 100644
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -25,19 +25,33 @@
static void print_usage(FILE *f)
{
- fprintf(f, "Usage: ip link { add | set | change | replace | del } NAME\n");
- fprintf(f, " type { gre | gretap } [ remote ADDR ] [ local ADDR ]\n");
- fprintf(f, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
- fprintf(f, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
- fprintf(f, " [ noencap ] [ encap { fou | gue | none } ]\n");
- fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
- fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
- fprintf(f, "\n");
- fprintf(f, "Where: NAME := STRING\n");
- fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
- fprintf(f, " TOS := { NUMBER | inherit }\n");
- fprintf(f, " TTL := { 1..255 | inherit }\n");
- fprintf(f, " KEY := { DOTTED_QUAD | NUMBER }\n");
+ fprintf(f,
+ "Usage: ... { gre | gretap | erspan } [ remote ADDR ]\n"
+ " [ local ADDR ]\n"
+ " [ [i|o]seq ]\n"
+ " [ [i|o]key KEY ]\n"
+ " [ [i|o]csum ]\n"
+ " [ ttl TTL ]\n"
+ " [ tos TOS ]\n"
+ " [ [no]pmtudisc ]\n"
+ " [ [no]ignore-df ]\n"
+ " [ dev PHYS_DEV ]\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"
+ " [ fwmark MARK ]\n"
+ " [ erspan IDX ]\n"
+ "\n"
+ "Where: ADDR := { IP_ADDRESS | any }\n"
+ " TOS := { NUMBER | inherit }\n"
+ " TTL := { 1..255 | inherit }\n"
+ " KEY := { DOTTED_QUAD | NUMBER }\n"
+ " MARK := { 0x0..0xffffffff }\n"
+ );
}
static void usage(void) __attribute__((noreturn));
@@ -50,22 +64,28 @@ static void usage(void)
static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
+ struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
struct {
struct nlmsghdr n;
struct ifinfomsg i;
char buf[16384];
- } req;
- struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+ } 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 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;
- unsigned saddr = 0;
- unsigned daddr = 0;
- unsigned link = 0;
+ unsigned int ikey = 0;
+ unsigned int okey = 0;
+ unsigned int saddr = 0;
+ unsigned int daddr = 0;
+ unsigned int link = 0;
__u8 pmtudisc = 1;
__u8 ttl = 0;
__u8 tos = 0;
@@ -75,16 +95,11 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
__u16 encapsport = 0;
__u16 encapdport = 0;
__u8 metadata = 0;
+ __u8 ignore_df = 0;
+ __u32 fwmark = 0;
+ __u32 erspan_idx = 0;
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, &req.n, sizeof(req)) < 0) {
get_failed:
fprintf(stderr,
@@ -152,11 +167,21 @@ get_failed:
if (greinfo[IFLA_GRE_COLLECT_METADATA])
metadata = 1;
+
+ if (greinfo[IFLA_GRE_IGNORE_DF])
+ ignore_df =
+ !!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);
+
+ if (greinfo[IFLA_GRE_FWMARK])
+ fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
+
+ if (greinfo[IFLA_GRE_ERSPAN_INDEX])
+ erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
}
while (argc > 0) {
if (!matches(*argv, "key")) {
- unsigned uval;
+ unsigned int uval;
NEXT_ARG();
iflags |= GRE_KEY;
@@ -174,14 +199,14 @@ get_failed:
ikey = okey = uval;
} else if (!matches(*argv, "ikey")) {
- unsigned uval;
+ unsigned int uval;
NEXT_ARG();
iflags |= GRE_KEY;
if (strchr(*argv, '.'))
uval = get_addr32(*argv);
else {
- if (get_unsigned(&uval, *argv, 0)<0) {
+ if (get_unsigned(&uval, *argv, 0) < 0) {
fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
@@ -189,14 +214,14 @@ get_failed:
}
ikey = uval;
} else if (!matches(*argv, "okey")) {
- unsigned uval;
+ unsigned int uval;
NEXT_ARG();
oflags |= GRE_KEY;
if (strchr(*argv, '.'))
uval = get_addr32(*argv);
else {
- if (get_unsigned(&uval, *argv, 0)<0) {
+ if (get_unsigned(&uval, *argv, 0) < 0) {
fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
exit(-1);
}
@@ -239,7 +264,7 @@ get_failed:
}
} else if (!matches(*argv, "ttl") ||
!matches(*argv, "hoplimit")) {
- unsigned uval;
+ unsigned int uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
@@ -297,6 +322,23 @@ get_failed:
encapflags |= ~TUNNEL_ENCAP_FLAG_REMCSUM;
} else if (strcmp(*argv, "external") == 0) {
metadata = 1;
+ } else if (strcmp(*argv, "ignore-df") == 0) {
+ ignore_df = 1;
+ } else if (strcmp(*argv, "noignore-df") == 0) {
+ /*
+ *only the lsb is significant, use 2 for presence
+ */
+ ignore_df = 2;
+ } else if (strcmp(*argv, "fwmark") == 0) {
+ NEXT_ARG();
+ if (get_u32(&fwmark, *argv, 0))
+ invarg("invalid fwmark\n", *argv);
+ } else if (strcmp(*argv, "erspan") == 0) {
+ NEXT_ARG();
+ if (get_u32(&erspan_idx, *argv, 0))
+ invarg("invalid erspan index\n", *argv);
+ if (erspan_idx & ~((1<<20) - 1) || erspan_idx == 0)
+ invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
} else
usage();
argc--; argv++;
@@ -315,86 +357,106 @@ get_failed:
return -1;
}
- 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, &saddr, 4);
- addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
- addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
- if (link)
- addattr32(n, 1024, IFLA_GRE_LINK, link);
- addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
- addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
+ if (!metadata) {
+ 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, &saddr, 4);
+ addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
+ addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
+ if (link)
+ addattr32(n, 1024, IFLA_GRE_LINK, link);
+ addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
+ addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
+ addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
+ if (erspan_idx != 0)
+ addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
+ } else {
+ addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
+ }
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));
- if (metadata)
- addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
+
+ if (ignore_df)
+ addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
return 0;
}
-static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+static void gre_print_direct_opt(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;
-
- if (!tb)
- return;
+ unsigned int iflags = 0;
+ unsigned int oflags = 0;
if (tb[IFLA_GRE_REMOTE]) {
- unsigned addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]);
+ unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]);
if (addr)
- remote = format_host(AF_INET, 4, &addr, s1, sizeof(s1));
+ remote = format_host(AF_INET, 4, &addr);
}
- fprintf(f, "remote %s ", remote);
+ print_string(PRINT_ANY, "remote", "remote %s ", remote);
if (tb[IFLA_GRE_LOCAL]) {
- unsigned addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]);
+ unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]);
if (addr)
- local = format_host(AF_INET, 4, &addr, s1, sizeof(s1));
+ local = format_host(AF_INET, 4, &addr);
}
- fprintf(f, "local %s ", local);
+ print_string(PRINT_ANY, "local", "local %s ", local);
if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
- unsigned link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
+ unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
const char *n = if_indextoname(link, s2);
if (n)
- fprintf(f, "dev %s ", n);
+ print_string(PRINT_ANY, "link", "dev %s ", n);
else
- fprintf(f, "dev %u ", link);
+ print_uint(PRINT_ANY, "link_index", "dev %u ", link);
}
- if (tb[IFLA_GRE_TTL] && rta_getattr_u8(tb[IFLA_GRE_TTL]))
- fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_GRE_TTL]));
- else
- fprintf(f, "ttl inherit ");
+ if (tb[IFLA_GRE_TTL]) {
+ __u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
+
+ if (ttl)
+ print_int(PRINT_ANY, "ttl", "ttl %d ", ttl);
+ else
+ print_int(PRINT_JSON, "ttl", NULL, ttl);
+ } else {
+ print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
+ }
if (tb[IFLA_GRE_TOS] && rta_getattr_u8(tb[IFLA_GRE_TOS])) {
int tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
- fputs("tos ", f);
- if (tos == 1)
- fputs("inherit ", f);
- else
- fprintf(f, "0x%x ", tos);
+ if (is_json_context()) {
+ SPRINT_BUF(b1);
+
+ snprintf(b1, sizeof(b1), "0x%x", tos);
+ print_string(PRINT_JSON, "tos", NULL, b1);
+ } else {
+ fputs("tos ", f);
+ if (tos == 1)
+ fputs("inherit ", f);
+ else
+ fprintf(f, "0x%x ", tos);
+ }
}
- if (tb[IFLA_GRE_PMTUDISC] &&
- !rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
- fputs("nopmtudisc ", f);
+ if (tb[IFLA_GRE_PMTUDISC]) {
+ if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
+ print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
+ else
+ print_bool(PRINT_JSON, "pmtudisc", NULL, true);
+ }
if (tb[IFLA_GRE_IFLAGS])
iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
@@ -404,72 +466,127 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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);
+ print_string(PRINT_ANY, "ikey", "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);
+ print_string(PRINT_ANY, "okey", "okey %s ", s2);
}
if (iflags & GRE_SEQ)
- fputs("iseq ", f);
+ print_bool(PRINT_ANY, "iseq", "iseq ", true);
if (oflags & GRE_SEQ)
- fputs("oseq ", f);
+ print_bool(PRINT_ANY, "oseq", "oseq ", true);
if (iflags & GRE_CSUM)
- fputs("icsum ", f);
+ print_bool(PRINT_ANY, "icsum", "icsum ", true);
if (oflags & GRE_CSUM)
- fputs("ocsum ", f);
+ print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
+
+ if (tb[IFLA_GRE_FWMARK]) {
+ __u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
+
+ if (fwmark) {
+ snprintf(s2, sizeof(s2), "0x%x", fwmark);
- if (tb[IFLA_GRE_COLLECT_METADATA])
- fputs("external ", f);
+ print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
+ }
+ }
+}
+
+static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+ if (!tb)
+ return;
+
+ if (!tb[IFLA_GRE_COLLECT_METADATA])
+ gre_print_direct_opt(f, tb);
+ else
+ print_bool(PRINT_ANY, "external", "external ", true);
+
+ if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
+ print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);
+
+ if (tb[IFLA_GRE_ERSPAN_INDEX]) {
+ __u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
+
+ fprintf(f, "erspan_index %u ", erspan_idx);
+ }
if (tb[IFLA_GRE_ENCAP_TYPE] &&
- *(__u16 *)RTA_DATA(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
+ rta_getattr_u16(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);
+
+ open_json_object("encap");
+ print_string(PRINT_FP, NULL, "encap ", NULL);
+
switch (type) {
case TUNNEL_ENCAP_FOU:
- fputs("fou ", f);
+ print_string(PRINT_ANY, "type", "%s ", "fou");
break;
case TUNNEL_ENCAP_GUE:
- fputs("gue ", f);
+ print_string(PRINT_ANY, "type", "%s ", "gue");
break;
default:
- fputs("unknown ", f);
+ print_null(PRINT_ANY, "type", "%s ", "unknown");
break;
}
- if (sport == 0)
- fputs("encap-sport auto ", f);
- else
- fprintf(f, "encap-sport %u", ntohs(sport));
+ if (is_json_context()) {
+ print_uint(PRINT_JSON,
+ "sport",
+ NULL,
+ sport ? ntohs(sport) : 0);
+ print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
+
+ print_bool(PRINT_JSON,
+ "csum",
+ NULL,
+ flags & TUNNEL_ENCAP_FLAG_CSUM);
+
+ print_bool(PRINT_JSON,
+ "csum6",
+ NULL,
+ flags & TUNNEL_ENCAP_FLAG_CSUM6);
+
+ print_bool(PRINT_JSON,
+ "remcsum",
+ NULL,
+ flags & TUNNEL_ENCAP_FLAG_REMCSUM);
+
+ close_json_object();
+ } else {
+ if (sport == 0)
+ fputs("encap-sport auto ", f);
+ else
+ fprintf(f, "encap-sport %u", ntohs(sport));
- fprintf(f, "encap-dport %u ", ntohs(dport));
+ fprintf(f, "encap-dport %u ", ntohs(dport));
- if (flags & TUNNEL_ENCAP_FLAG_CSUM)
- fputs("encap-csum ", f);
- else
- fputs("noencap-csum ", f);
+ 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);
+ if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
+ fputs("encap-csum6 ", f);
+ else
+ fputs("noencap-csum6 ", f);
- if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
- fputs("encap-remcsum ", f);
- else
- fputs("noencap-remcsum ", f);
+ if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
+ fputs("encap-remcsum ", f);
+ else
+ fputs("noencap-remcsum ", f);
+ }
}
}
static void gre_print_help(struct link_util *lu, int argc, char **argv,
- FILE *f)
+ FILE *f)
{
print_usage(f);
}
@@ -489,3 +606,11 @@ struct link_util gretap_link_util = {
.print_opt = gre_print_opt,
.print_help = gre_print_help,
};
+
+struct link_util erspan_link_util = {
+ .id = "erspan",
+ .maxattr = IFLA_GRE_MAX,
+ .parse_opt = gre_parse_opt,
+ .print_opt = gre_print_opt,
+ .print_help = gre_print_help,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-12 15:25:44 +0000