summaryrefslogtreecommitdiffstats
path: root/ip/iplink_geneve.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--ip/iplink_geneve.c395
1 files changed, 395 insertions, 0 deletions
diff --git a/ip/iplink_geneve.c b/ip/iplink_geneve.c
new file mode 100644
index 0000000..98099cc
--- /dev/null
+++ b/ip/iplink_geneve.c
@@ -0,0 +1,395 @@
+/*
+ * iplink_geneve.c GENEVE device support
+ *
+ * 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: John W. Linville <linville@tuxdriver.com>
+ */
+
+#include <stdio.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+#define GENEVE_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
+
+static void print_explain(FILE *f)
+{
+ fprintf(f,
+ "Usage: ... geneve id VNI\n"
+ " remote ADDR\n"
+ " [ ttl TTL ]\n"
+ " [ tos TOS ]\n"
+ " [ df DF ]\n"
+ " [ flowlabel LABEL ]\n"
+ " [ dstport PORT ]\n"
+ " [ [no]external ]\n"
+ " [ [no]udpcsum ]\n"
+ " [ [no]udp6zerocsumtx ]\n"
+ " [ [no]udp6zerocsumrx ]\n"
+ " [ innerprotoinherit ]\n"
+ "\n"
+ "Where: VNI := 0-16777215\n"
+ " ADDR := IP_ADDRESS\n"
+ " TOS := { NUMBER | inherit }\n"
+ " TTL := { 1..255 | auto | inherit }\n"
+ " DF := { unset | set | inherit }\n"
+ " LABEL := 0-1048575\n"
+ );
+}
+
+static void explain(void)
+{
+ print_explain(stderr);
+}
+
+static void check_duparg(__u64 *attrs, int type, const char *key,
+ const char *argv)
+{
+ if (!GENEVE_ATTRSET(*attrs, type)) {
+ *attrs |= (1L << type);
+ return;
+ }
+ duparg2(key, argv);
+}
+
+static int geneve_parse_opt(struct link_util *lu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ inet_prefix daddr;
+ __u32 vni = 0;
+ __u32 label = 0;
+ __u8 ttl = 0;
+ __u8 tos = 0;
+ __u16 dstport = 0;
+ bool metadata = 0;
+ __u8 udpcsum = 0;
+ __u8 udp6zerocsumtx = 0;
+ __u8 udp6zerocsumrx = 0;
+ __u64 attrs = 0;
+ bool set_op = (n->nlmsg_type == RTM_NEWLINK &&
+ !(n->nlmsg_flags & NLM_F_CREATE));
+ bool inner_proto_inherit = false;
+
+ inet_prefix_reset(&daddr);
+
+ while (argc > 0) {
+ if (!matches(*argv, "id") ||
+ !matches(*argv, "vni")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_ID, "id", *argv);
+ if (get_u32(&vni, *argv, 0) ||
+ vni >= 1u << 24)
+ invarg("invalid id", *argv);
+ } else if (!matches(*argv, "remote")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_REMOTE, "remote",
+ *argv);
+ get_addr(&daddr, *argv, AF_UNSPEC);
+ if (!is_addrtype_inet_not_multi(&daddr))
+ invarg("invalid remote address", *argv);
+ } else if (!matches(*argv, "ttl") ||
+ !matches(*argv, "hoplimit")) {
+ unsigned int uval;
+
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_TTL, "ttl", *argv);
+ if (strcmp(*argv, "inherit") == 0) {
+ addattr8(n, 1024, IFLA_GENEVE_TTL_INHERIT, 1);
+ } else if (strcmp(*argv, "auto") != 0) {
+ if (get_unsigned(&uval, *argv, 0))
+ invarg("invalid TTL", *argv);
+ if (uval > 255)
+ invarg("TTL must be <= 255", *argv);
+ ttl = uval;
+ }
+ } else if (!matches(*argv, "tos") ||
+ !matches(*argv, "dsfield")) {
+ __u32 uval;
+
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_TOS, "tos", *argv);
+ if (strcmp(*argv, "inherit") != 0) {
+ if (rtnl_dsfield_a2n(&uval, *argv))
+ invarg("bad TOS value", *argv);
+ tos = uval;
+ } else
+ tos = 1;
+ } else if (!matches(*argv, "df")) {
+ enum ifla_geneve_df df;
+
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_DF, "df", *argv);
+ if (strcmp(*argv, "unset") == 0)
+ df = GENEVE_DF_UNSET;
+ else if (strcmp(*argv, "set") == 0)
+ df = GENEVE_DF_SET;
+ else if (strcmp(*argv, "inherit") == 0)
+ df = GENEVE_DF_INHERIT;
+ else
+ invarg("DF must be 'unset', 'set' or 'inherit'",
+ *argv);
+
+ addattr8(n, 1024, IFLA_GENEVE_DF, df);
+ } else if (!matches(*argv, "label") ||
+ !matches(*argv, "flowlabel")) {
+ __u32 uval;
+
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_LABEL, "flowlabel",
+ *argv);
+ if (get_u32(&uval, *argv, 0) ||
+ (uval & ~LABEL_MAX_MASK))
+ invarg("invalid flowlabel", *argv);
+ label = htonl(uval);
+ } else if (!matches(*argv, "dstport")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_GENEVE_PORT, "dstport",
+ *argv);
+ if (get_u16(&dstport, *argv, 0))
+ invarg("dstport", *argv);
+ } else if (!matches(*argv, "external")) {
+ check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA,
+ *argv, *argv);
+ metadata = true;
+ } else if (!matches(*argv, "noexternal")) {
+ check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA,
+ *argv, *argv);
+ metadata = false;
+ } else if (!matches(*argv, "udpcsum")) {
+ check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv,
+ *argv);
+ udpcsum = 1;
+ } else if (!matches(*argv, "noudpcsum")) {
+ check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv,
+ *argv);
+ udpcsum = 0;
+ } else if (!matches(*argv, "udp6zerocsumtx")) {
+ check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
+ *argv, *argv);
+ udp6zerocsumtx = 1;
+ } else if (!matches(*argv, "noudp6zerocsumtx")) {
+ check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
+ *argv, *argv);
+ udp6zerocsumtx = 0;
+ } else if (!matches(*argv, "udp6zerocsumrx")) {
+ check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
+ *argv, *argv);
+ udp6zerocsumrx = 1;
+ } else if (!matches(*argv, "noudp6zerocsumrx")) {
+ check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
+ *argv, *argv);
+ udp6zerocsumrx = 0;
+ } else if (!strcmp(*argv, "innerprotoinherit")) {
+ check_duparg(&attrs, IFLA_GENEVE_INNER_PROTO_INHERIT,
+ *argv, *argv);
+ inner_proto_inherit = true;
+ } else if (matches(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "geneve: unknown command \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--, argv++;
+ }
+
+ if (metadata && GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) {
+ fprintf(stderr, "geneve: both 'external' and vni cannot be specified\n");
+ return -1;
+ }
+
+ if (!metadata) {
+ /* parameter checking make sense only for full geneve tunnels */
+ if (!GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) {
+ fprintf(stderr, "geneve: missing virtual network identifier\n");
+ return -1;
+ }
+
+ /* If we are modifying the geneve device, then we only need the
+ * ID (VNI) to identify the geneve device, and we do not need
+ * the remote IP.
+ */
+ if (!set_op && !is_addrtype_inet(&daddr)) {
+ fprintf(stderr, "geneve: remote link partner not specified\n");
+ return -1;
+ }
+ }
+
+ addattr32(n, 1024, IFLA_GENEVE_ID, vni);
+ if (is_addrtype_inet(&daddr)) {
+ int type = (daddr.family == AF_INET) ? IFLA_GENEVE_REMOTE :
+ IFLA_GENEVE_REMOTE6;
+ addattr_l(n, 1024, type, daddr.data, daddr.bytelen);
+ }
+ if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_LABEL))
+ addattr32(n, 1024, IFLA_GENEVE_LABEL, label);
+ if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_TTL))
+ addattr8(n, 1024, IFLA_GENEVE_TTL, ttl);
+ if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_TOS))
+ addattr8(n, 1024, IFLA_GENEVE_TOS, tos);
+ if (dstport)
+ addattr16(n, 1024, IFLA_GENEVE_PORT, htons(dstport));
+ if (metadata)
+ addattr(n, 1024, IFLA_GENEVE_COLLECT_METADATA);
+ if (inner_proto_inherit)
+ addattr(n, 1024, IFLA_GENEVE_INNER_PROTO_INHERIT);
+ if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_CSUM))
+ addattr8(n, 1024, IFLA_GENEVE_UDP_CSUM, udpcsum);
+ if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX))
+ addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
+ if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX))
+ addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);
+
+ return 0;
+}
+
+static void geneve_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+ __u8 ttl = 0;
+ __u8 tos = 0;
+
+ if (!tb)
+ return;
+
+ if (tb[IFLA_GENEVE_COLLECT_METADATA]) {
+ print_bool(PRINT_ANY, "external", "external ", true);
+ }
+
+ if (tb[IFLA_GENEVE_ID] &&
+ RTA_PAYLOAD(tb[IFLA_GENEVE_ID]) >= sizeof(__u32)) {
+ print_uint(PRINT_ANY, "id", "id %u ", rta_getattr_u32(tb[IFLA_GENEVE_ID]));
+ }
+
+ if (tb[IFLA_GENEVE_REMOTE]) {
+ __be32 addr = rta_getattr_u32(tb[IFLA_GENEVE_REMOTE]);
+
+ if (addr)
+ print_string(PRINT_ANY,
+ "remote",
+ "remote %s ",
+ format_host(AF_INET, 4, &addr));
+ } else if (tb[IFLA_GENEVE_REMOTE6]) {
+ struct in6_addr addr;
+
+ memcpy(&addr, RTA_DATA(tb[IFLA_GENEVE_REMOTE6]), sizeof(struct in6_addr));
+ if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {
+ if (!IN6_IS_ADDR_MULTICAST(&addr))
+ print_string(PRINT_ANY,
+ "remote6",
+ "remote %s ",
+ format_host(AF_INET6,
+ sizeof(struct in6_addr),
+ &addr));
+ }
+ }
+
+ if (tb[IFLA_GENEVE_TTL_INHERIT] &&
+ rta_getattr_u8(tb[IFLA_GENEVE_TTL_INHERIT])) {
+ print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
+ } else if (tb[IFLA_GENEVE_TTL]) {
+ ttl = rta_getattr_u8(tb[IFLA_GENEVE_TTL]);
+ if (is_json_context() || ttl)
+ print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
+ else
+ print_string(PRINT_FP, NULL, "ttl %s ", "auto");
+ }
+
+ if (tb[IFLA_GENEVE_TOS])
+ tos = rta_getattr_u8(tb[IFLA_GENEVE_TOS]);
+ if (tos) {
+ if (is_json_context() || tos != 1)
+ print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);
+ else
+ print_string(PRINT_FP, NULL, "tos %s ", "inherit");
+ }
+
+ if (tb[IFLA_GENEVE_DF]) {
+ enum ifla_geneve_df df = rta_getattr_u8(tb[IFLA_GENEVE_DF]);
+
+ if (df == GENEVE_DF_UNSET)
+ print_string(PRINT_JSON, "df", "df %s ", "unset");
+ else if (df == GENEVE_DF_SET)
+ print_string(PRINT_ANY, "df", "df %s ", "set");
+ else if (df == GENEVE_DF_INHERIT)
+ print_string(PRINT_ANY, "df", "df %s ", "inherit");
+ }
+
+ if (tb[IFLA_GENEVE_LABEL]) {
+ __u32 label = rta_getattr_u32(tb[IFLA_GENEVE_LABEL]);
+
+ if (label)
+ print_0xhex(PRINT_ANY,
+ "label", "flowlabel %#llx ",
+ ntohl(label));
+ }
+
+ if (tb[IFLA_GENEVE_PORT])
+ print_uint(PRINT_ANY,
+ "port",
+ "dstport %u ",
+ rta_getattr_be16(tb[IFLA_GENEVE_PORT]));
+
+ if (tb[IFLA_GENEVE_UDP_CSUM]) {
+ if (is_json_context()) {
+ print_bool(PRINT_JSON,
+ "udp_csum",
+ NULL,
+ rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]));
+ } else {
+ if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]))
+ fputs("no", f);
+ fputs("udpcsum ", f);
+ }
+ }
+
+ if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) {
+ if (is_json_context()) {
+ print_bool(PRINT_JSON,
+ "udp_zero_csum6_tx",
+ NULL,
+ rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]));
+ } else {
+ if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
+ fputs("no", f);
+ fputs("udp6zerocsumtx ", f);
+ }
+ }
+
+ if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) {
+ if (is_json_context()) {
+ print_bool(PRINT_JSON,
+ "udp_zero_csum6_rx",
+ NULL,
+ rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]));
+ } else {
+ if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
+ fputs("no", f);
+ fputs("udp6zerocsumrx ", f);
+ }
+ }
+
+ if (tb[IFLA_GENEVE_INNER_PROTO_INHERIT]) {
+ print_bool(PRINT_ANY, "inner_proto_inherit",
+ "innerprotoinherit ", true);
+ }
+}
+
+static void geneve_print_help(struct link_util *lu, int argc, char **argv,
+ FILE *f)
+{
+ print_explain(f);
+}
+
+struct link_util geneve_link_util = {
+ .id = "geneve",
+ .maxattr = IFLA_GENEVE_MAX,
+ .parse_opt = geneve_parse_opt,
+ .print_opt = geneve_print_opt,
+ .print_help = geneve_print_help,
+};