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-rw-r--r--ip/ipila.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/ip/ipila.c b/ip/ipila.c
new file mode 100644
index 0000000..475c35b
--- /dev/null
+++ b/ip/ipila.c
@@ -0,0 +1,308 @@
+/*
+ * ipila.c ILA (Identifier Locator Addressing) 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: Tom Herbert <tom@herbertland.com>
+ */
+
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <net/if.h>
+#include <linux/ila.h>
+#include <linux/genetlink.h>
+#include <linux/ip.h>
+#include <arpa/inet.h>
+
+#include "libgenl.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "ila_common.h"
+#include "json_print.h"
+
+static void usage(void)
+{
+ fprintf(stderr,
+ "Usage: ip ila add loc_match LOCATOR_MATCH loc LOCATOR [ dev DEV ] OPTIONS\n"
+ " ip ila del loc_match LOCATOR_MATCH [ loc LOCATOR ] [ dev DEV ]\n"
+ " ip ila list\n"
+ "OPTIONS := [ csum-mode { adj-transport | neutral-map |\n"
+ " neutral-map-auto | no-action } ]\n"
+ " [ ident-type { luid | use-format } ]\n");
+
+ exit(-1);
+}
+
+/* netlink socket */
+static struct rtnl_handle genl_rth = { .fd = -1 };
+static int genl_family = -1;
+
+#define ILA_REQUEST(_req, _bufsiz, _cmd, _flags) \
+ GENL_REQUEST(_req, _bufsiz, genl_family, 0, \
+ ILA_GENL_VERSION, _cmd, _flags)
+
+#define ILA_RTA(g) ((struct rtattr *)(((char *)(g)) + \
+ NLMSG_ALIGN(sizeof(struct genlmsghdr))))
+
+static void print_addr64(__u64 addr, char *buff, size_t len)
+{
+ __u16 *words = (__u16 *)&addr;
+ __u16 v;
+ int i, ret;
+ size_t written = 0;
+ char *sep = ":";
+
+ for (i = 0; i < 4; i++) {
+ v = ntohs(words[i]);
+
+ if (i == 3)
+ sep = "";
+
+ ret = snprintf(&buff[written], len - written, "%x%s", v, sep);
+ written += ret;
+ }
+}
+
+static void print_ila_locid(const char *tag, int attr, struct rtattr *tb[])
+{
+ char abuf[256];
+
+ if (tb[attr])
+ print_addr64(rta_getattr_u64(tb[attr]),
+ abuf, sizeof(abuf));
+ else
+ snprintf(abuf, sizeof(abuf), "-");
+
+ /* 20 = sizeof("xxxx:xxxx:xxxx:xxxx") */
+ print_string(PRINT_ANY, tag, "%-20s", abuf);
+}
+
+static int print_ila_mapping(struct nlmsghdr *n, void *arg)
+{
+ struct genlmsghdr *ghdr;
+ struct rtattr *tb[ILA_ATTR_MAX + 1];
+ int len = n->nlmsg_len;
+
+ if (n->nlmsg_type != genl_family)
+ return 0;
+
+ len -= NLMSG_LENGTH(GENL_HDRLEN);
+ if (len < 0)
+ return -1;
+
+ ghdr = NLMSG_DATA(n);
+ parse_rtattr(tb, ILA_ATTR_MAX, (void *) ghdr + GENL_HDRLEN, len);
+
+ open_json_object(NULL);
+ print_ila_locid("locator_match", ILA_ATTR_LOCATOR_MATCH, tb);
+ print_ila_locid("locator", ILA_ATTR_LOCATOR, tb);
+
+ if (tb[ILA_ATTR_IFINDEX]) {
+ __u32 ifindex
+ = rta_getattr_u32(tb[ILA_ATTR_IFINDEX]);
+
+ print_color_string(PRINT_ANY, COLOR_IFNAME,
+ "interface", "%-16s",
+ ll_index_to_name(ifindex));
+ } else {
+ print_string(PRINT_FP, NULL, "%-10s ", "-");
+ }
+
+ if (tb[ILA_ATTR_CSUM_MODE]) {
+ __u8 csum = rta_getattr_u8(tb[ILA_ATTR_CSUM_MODE]);
+
+ print_string(PRINT_ANY, "csum_mode", "%s",
+ ila_csum_mode2name(csum));
+ } else
+ print_string(PRINT_FP, NULL, "%-10s ", "-");
+
+ if (tb[ILA_ATTR_IDENT_TYPE])
+ print_string(PRINT_ANY, "ident_type", "%s",
+ ila_ident_type2name(rta_getattr_u8(
+ tb[ILA_ATTR_IDENT_TYPE])));
+ else
+ print_string(PRINT_FP, NULL, "%s", "-");
+
+ print_nl();
+ close_json_object();
+
+ return 0;
+}
+
+#define NLMSG_BUF_SIZE 4096
+
+static int do_list(int argc, char **argv)
+{
+ ILA_REQUEST(req, 1024, ILA_CMD_GET, NLM_F_REQUEST | NLM_F_DUMP);
+
+ if (argc > 0) {
+ fprintf(stderr, "\"ip ila show\" does not take "
+ "any arguments.\n");
+ return -1;
+ }
+
+ if (rtnl_send(&genl_rth, (void *)&req, req.n.nlmsg_len) < 0) {
+ perror("Cannot send dump request");
+ exit(1);
+ }
+
+ new_json_obj(json);
+ if (rtnl_dump_filter(&genl_rth, print_ila_mapping, stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ return 1;
+ }
+ delete_json_obj();
+ fflush(stdout);
+
+ return 0;
+}
+
+static int ila_parse_opt(int argc, char **argv, struct nlmsghdr *n,
+ bool adding)
+{
+ __u64 locator = 0;
+ __u64 locator_match = 0;
+ int ifindex = 0;
+ int csum_mode = 0;
+ int ident_type = 0;
+ bool loc_set = false;
+ bool loc_match_set = false;
+ bool ifindex_set = false;
+ bool csum_mode_set = false;
+ bool ident_type_set = false;
+
+ while (argc > 0) {
+ if (!matches(*argv, "loc")) {
+ NEXT_ARG();
+
+ if (get_addr64(&locator, *argv) < 0) {
+ fprintf(stderr, "Bad locator: %s\n", *argv);
+ return -1;
+ }
+ loc_set = true;
+ } else if (!matches(*argv, "loc_match")) {
+ NEXT_ARG();
+
+ if (get_addr64(&locator_match, *argv) < 0) {
+ fprintf(stderr, "Bad locator to match: %s\n",
+ *argv);
+ return -1;
+ }
+ loc_match_set = true;
+ } else if (!matches(*argv, "csum-mode")) {
+ NEXT_ARG();
+
+ csum_mode = ila_csum_name2mode(*argv);
+ if (csum_mode < 0) {
+ fprintf(stderr, "Bad csum-mode: %s\n",
+ *argv);
+ return -1;
+ }
+ csum_mode_set = true;
+ } else if (!matches(*argv, "ident-type")) {
+ NEXT_ARG();
+
+ ident_type = ila_ident_name2type(*argv);
+ if (ident_type < 0) {
+ fprintf(stderr, "Bad ident-type: %s\n",
+ *argv);
+ return -1;
+ }
+ ident_type_set = true;
+ } else if (!matches(*argv, "dev")) {
+ NEXT_ARG();
+
+ ifindex = ll_name_to_index(*argv);
+ if (ifindex == 0) {
+ fprintf(stderr, "No such interface: %s\n",
+ *argv);
+ return -1;
+ }
+ ifindex_set = true;
+ } else {
+ usage();
+ return -1;
+ }
+ argc--, argv++;
+ }
+
+ if (adding) {
+ if (!loc_set) {
+ fprintf(stderr, "ila: missing locator\n");
+ return -1;
+ }
+ if (!loc_match_set) {
+ fprintf(stderr, "ila: missing locator0match\n");
+ return -1;
+ }
+ }
+
+ if (loc_match_set)
+ addattr64(n, 1024, ILA_ATTR_LOCATOR_MATCH, locator_match);
+
+ if (loc_set)
+ addattr64(n, 1024, ILA_ATTR_LOCATOR, locator);
+
+ if (ifindex_set)
+ addattr32(n, 1024, ILA_ATTR_IFINDEX, ifindex);
+
+ if (csum_mode_set)
+ addattr8(n, 1024, ILA_ATTR_CSUM_MODE, csum_mode);
+
+ if (ident_type_set)
+ addattr8(n, 1024, ILA_ATTR_IDENT_TYPE, ident_type);
+
+ return 0;
+}
+
+static int do_add(int argc, char **argv)
+{
+ ILA_REQUEST(req, 1024, ILA_CMD_ADD, NLM_F_REQUEST);
+
+ ila_parse_opt(argc, argv, &req.n, true);
+
+ if (rtnl_talk(&genl_rth, &req.n, NULL) < 0)
+ return -2;
+
+ return 0;
+}
+
+static int do_del(int argc, char **argv)
+{
+ ILA_REQUEST(req, 1024, ILA_CMD_DEL, NLM_F_REQUEST);
+
+ ila_parse_opt(argc, argv, &req.n, false);
+
+ if (rtnl_talk(&genl_rth, &req.n, NULL) < 0)
+ return -2;
+
+ return 0;
+}
+
+int do_ipila(int argc, char **argv)
+{
+ if (argc < 1)
+ usage();
+
+ if (matches(*argv, "help") == 0)
+ usage();
+
+ if (genl_init_handle(&genl_rth, ILA_GENL_NAME, &genl_family))
+ exit(1);
+
+ if (matches(*argv, "add") == 0)
+ return do_add(argc-1, argv+1);
+ if (matches(*argv, "delete") == 0)
+ return do_del(argc-1, argv+1);
+ if (matches(*argv, "list") == 0)
+ return do_list(argc-1, argv+1);
+
+ fprintf(stderr, "Command \"%s\" is unknown, try \"ip ila help\".\n",
+ *argv);
+ exit(-1);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 01:56:58 +0000