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/*
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* ipila.c ILA (Identifier Locator Addressing) support
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Tom Herbert <tom@herbertland.com>
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*/
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <net/if.h>
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#include <linux/ila.h>
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#include <linux/genetlink.h>
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#include <linux/ip.h>
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#include <arpa/inet.h>
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#include "libgenl.h"
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#include "utils.h"
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#include "ip_common.h"
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#include "ila_common.h"
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#include "json_print.h"
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static void usage(void)
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{
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fprintf(stderr,
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"Usage: ip ila add loc_match LOCATOR_MATCH loc LOCATOR [ dev DEV ] OPTIONS\n"
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" ip ila del loc_match LOCATOR_MATCH [ loc LOCATOR ] [ dev DEV ]\n"
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" ip ila list\n"
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"OPTIONS := [ csum-mode { adj-transport | neutral-map | neutral-map-auto | no-action } ]\n"
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" [ ident-type { luid | use-format } ]\n");
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exit(-1);
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}
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/* netlink socket */
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static struct rtnl_handle genl_rth = { .fd = -1 };
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static int genl_family = -1;
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#define ILA_REQUEST(_req, _bufsiz, _cmd, _flags) \
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GENL_REQUEST(_req, _bufsiz, genl_family, 0, \
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ILA_GENL_VERSION, _cmd, _flags)
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#define ILA_RTA(g) ((struct rtattr *)(((char *)(g)) + \
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NLMSG_ALIGN(sizeof(struct genlmsghdr))))
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static void print_addr64(__u64 addr, char *buff, size_t len)
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{
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__u16 *words = (__u16 *)&addr;
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__u16 v;
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int i, ret;
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size_t written = 0;
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char *sep = ":";
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for (i = 0; i < 4; i++) {
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v = ntohs(words[i]);
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if (i == 3)
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sep = "";
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ret = snprintf(&buff[written], len - written, "%x%s", v, sep);
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written += ret;
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}
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}
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static void print_ila_locid(const char *tag, int attr, struct rtattr *tb[])
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{
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char abuf[256];
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if (tb[attr])
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print_addr64(rta_getattr_u64(tb[attr]),
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abuf, sizeof(abuf));
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else
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snprintf(abuf, sizeof(abuf), "-");
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/* 20 = sizeof("xxxx:xxxx:xxxx:xxxx") */
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print_string(PRINT_ANY, tag, "%-20s", abuf);
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}
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static int print_ila_mapping(struct nlmsghdr *n, void *arg)
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{
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struct genlmsghdr *ghdr;
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struct rtattr *tb[ILA_ATTR_MAX + 1];
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int len = n->nlmsg_len;
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if (n->nlmsg_type != genl_family)
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return 0;
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len -= NLMSG_LENGTH(GENL_HDRLEN);
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if (len < 0)
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return -1;
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ghdr = NLMSG_DATA(n);
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parse_rtattr(tb, ILA_ATTR_MAX, (void *) ghdr + GENL_HDRLEN, len);
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open_json_object(NULL);
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print_ila_locid("locator_match", ILA_ATTR_LOCATOR_MATCH, tb);
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print_ila_locid("locator", ILA_ATTR_LOCATOR, tb);
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if (tb[ILA_ATTR_IFINDEX]) {
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__u32 ifindex
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= rta_getattr_u32(tb[ILA_ATTR_IFINDEX]);
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print_color_string(PRINT_ANY, COLOR_IFNAME,
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"interface", "%-16s",
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ll_index_to_name(ifindex));
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} else {
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print_string(PRINT_FP, NULL, "%-10s ", "-");
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}
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if (tb[ILA_ATTR_CSUM_MODE]) {
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__u8 csum = rta_getattr_u8(tb[ILA_ATTR_CSUM_MODE]);
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print_string(PRINT_ANY, "csum_mode", "%s",
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ila_csum_mode2name(csum));
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} else
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print_string(PRINT_FP, NULL, "%-10s ", "-");
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if (tb[ILA_ATTR_IDENT_TYPE])
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print_string(PRINT_ANY, "ident_type", "%s",
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ila_ident_type2name(rta_getattr_u8(
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tb[ILA_ATTR_IDENT_TYPE])));
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else
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print_string(PRINT_FP, NULL, "%s", "-");
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print_nl();
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close_json_object();
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return 0;
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}
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#define NLMSG_BUF_SIZE 4096
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static int do_list(int argc, char **argv)
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{
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ILA_REQUEST(req, 1024, ILA_CMD_GET, NLM_F_REQUEST | NLM_F_DUMP);
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if (argc > 0) {
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fprintf(stderr, "\"ip ila show\" does not take "
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"any arguments.\n");
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return -1;
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}
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if (rtnl_send(&genl_rth, (void *)&req, req.n.nlmsg_len) < 0) {
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perror("Cannot send dump request");
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exit(1);
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}
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new_json_obj(json);
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if (rtnl_dump_filter(&genl_rth, print_ila_mapping, stdout) < 0) {
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fprintf(stderr, "Dump terminated\n");
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return 1;
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}
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delete_json_obj();
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fflush(stdout);
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return 0;
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}
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static int ila_parse_opt(int argc, char **argv, struct nlmsghdr *n,
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bool adding)
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{
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__u64 locator = 0;
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__u64 locator_match = 0;
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int ifindex = 0;
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int csum_mode = 0;
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int ident_type = 0;
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bool loc_set = false;
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bool loc_match_set = false;
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bool ifindex_set = false;
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bool csum_mode_set = false;
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bool ident_type_set = false;
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while (argc > 0) {
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if (!matches(*argv, "loc")) {
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NEXT_ARG();
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if (get_addr64(&locator, *argv) < 0) {
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fprintf(stderr, "Bad locator: %s\n", *argv);
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return -1;
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}
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loc_set = true;
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} else if (!matches(*argv, "loc_match")) {
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NEXT_ARG();
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if (get_addr64(&locator_match, *argv) < 0) {
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fprintf(stderr, "Bad locator to match: %s\n",
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*argv);
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return -1;
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}
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loc_match_set = true;
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} else if (!matches(*argv, "csum-mode")) {
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NEXT_ARG();
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csum_mode = ila_csum_name2mode(*argv);
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if (csum_mode < 0) {
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fprintf(stderr, "Bad csum-mode: %s\n",
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*argv);
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return -1;
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}
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csum_mode_set = true;
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} else if (!matches(*argv, "ident-type")) {
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NEXT_ARG();
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ident_type = ila_ident_name2type(*argv);
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if (ident_type < 0) {
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fprintf(stderr, "Bad ident-type: %s\n",
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*argv);
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return -1;
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}
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ident_type_set = true;
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} else if (!matches(*argv, "dev")) {
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NEXT_ARG();
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ifindex = ll_name_to_index(*argv);
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if (ifindex == 0) {
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fprintf(stderr, "No such interface: %s\n",
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*argv);
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return -1;
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}
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ifindex_set = true;
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} else {
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usage();
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return -1;
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}
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argc--, argv++;
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}
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if (adding) {
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if (!loc_set) {
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fprintf(stderr, "ila: missing locator\n");
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return -1;
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}
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if (!loc_match_set) {
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fprintf(stderr, "ila: missing locator0match\n");
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return -1;
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d3f73b |
}
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d3f73b |
}
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d3f73b |
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d3f73b |
if (loc_match_set)
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d3f73b |
addattr64(n, 1024, ILA_ATTR_LOCATOR_MATCH, locator_match);
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d3f73b |
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d3f73b |
if (loc_set)
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d3f73b |
addattr64(n, 1024, ILA_ATTR_LOCATOR, locator);
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d3f73b |
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d3f73b |
if (ifindex_set)
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d3f73b |
addattr32(n, 1024, ILA_ATTR_IFINDEX, ifindex);
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d3f73b |
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d3f73b |
if (csum_mode_set)
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d3f73b |
addattr8(n, 1024, ILA_ATTR_CSUM_MODE, csum_mode);
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d3f73b |
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d3f73b |
if (ident_type_set)
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d3f73b |
addattr8(n, 1024, ILA_ATTR_IDENT_TYPE, ident_type);
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d3f73b |
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d3f73b |
return 0;
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d3f73b |
}
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d3f73b |
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d3f73b |
static int do_add(int argc, char **argv)
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d3f73b |
{
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d3f73b |
ILA_REQUEST(req, 1024, ILA_CMD_ADD, NLM_F_REQUEST);
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d3f73b |
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d3f73b |
ila_parse_opt(argc, argv, &req.n, true);
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d3f73b |
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d3f73b |
if (rtnl_talk(&genl_rth, &req.n, NULL) < 0)
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d3f73b |
return -2;
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d3f73b |
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d3f73b |
return 0;
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d3f73b |
}
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d3f73b |
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d3f73b |
static int do_del(int argc, char **argv)
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d3f73b |
{
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Packit |
d3f73b |
ILA_REQUEST(req, 1024, ILA_CMD_DEL, NLM_F_REQUEST);
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Packit |
d3f73b |
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Packit |
d3f73b |
ila_parse_opt(argc, argv, &req.n, false);
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d3f73b |
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Packit |
d3f73b |
if (rtnl_talk(&genl_rth, &req.n, NULL) < 0)
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d3f73b |
return -2;
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Packit |
d3f73b |
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Packit |
d3f73b |
return 0;
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Packit |
d3f73b |
}
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Packit |
d3f73b |
|
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Packit |
d3f73b |
int do_ipila(int argc, char **argv)
|
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Packit |
d3f73b |
{
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Packit |
d3f73b |
if (argc < 1)
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Packit |
d3f73b |
usage();
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Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (matches(*argv, "help") == 0)
|
|
Packit |
d3f73b |
usage();
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (genl_init_handle(&genl_rth, ILA_GENL_NAME, &genl_family))
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (matches(*argv, "add") == 0)
|
|
Packit |
d3f73b |
return do_add(argc-1, argv+1);
|
|
Packit |
d3f73b |
if (matches(*argv, "delete") == 0)
|
|
Packit |
d3f73b |
return do_del(argc-1, argv+1);
|
|
Packit |
d3f73b |
if (matches(*argv, "list") == 0)
|
|
Packit |
d3f73b |
return do_list(argc-1, argv+1);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
fprintf(stderr, "Command \"%s\" is unknown, try \"ip ila help\".\n",
|
|
Packit |
d3f73b |
*argv);
|
|
Packit |
d3f73b |
exit(-1);
|
|
Packit |
d3f73b |
}
|