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https://github.com/sheumann/hush.git
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365 lines
6.8 KiB
C
365 lines
6.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* rt_names.c rtnetlink names DB.
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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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*/
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#include "libbb.h"
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#include "rt_names.h"
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static void rtnl_tab_initialize(char *file, const char **tab, int size)
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{
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char buf[512];
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FILE *fp;
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fp = fopen(file, "r");
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if (!fp)
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return;
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while (fgets(buf, sizeof(buf), fp)) {
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char *p = buf;
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int id;
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char namebuf[512];
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while (*p == ' ' || *p == '\t')
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p++;
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if (*p == '#' || *p == '\n' || *p == 0)
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continue;
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if (sscanf(p, "0x%x %s\n", &id, namebuf) != 2 &&
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sscanf(p, "0x%x %s #", &id, namebuf) != 2 &&
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sscanf(p, "%d %s\n", &id, namebuf) != 2 &&
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sscanf(p, "%d %s #", &id, namebuf) != 2) {
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bb_error_msg("database %s is corrupted at %s",
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file, p);
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return;
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}
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if (id < 0 || id > size)
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continue;
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tab[id] = xstrdup(namebuf);
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}
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fclose(fp);
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}
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static const char **rtnl_rtprot_tab; /* [256] */
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static void rtnl_rtprot_initialize(void)
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{
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static const char *const init_tab[] = {
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"none",
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"redirect",
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"kernel",
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"boot",
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"static",
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NULL,
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NULL,
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NULL,
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"gated",
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"ra",
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"mrt",
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"zebra",
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"bird",
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};
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if (rtnl_rtprot_tab) return;
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rtnl_rtprot_tab = xzalloc(256 * sizeof(rtnl_rtprot_tab[0]));
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memcpy(rtnl_rtprot_tab, init_tab, sizeof(init_tab));
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rtnl_tab_initialize("/etc/iproute2/rt_protos",
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rtnl_rtprot_tab, 256);
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}
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const char* rtnl_rtprot_n2a(int id, char *buf, int len)
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{
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if (id < 0 || id >= 256) {
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snprintf(buf, len, "%d", id);
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return buf;
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}
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rtnl_rtprot_initialize();
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if (rtnl_rtprot_tab[id])
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return rtnl_rtprot_tab[id];
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snprintf(buf, len, "%d", id);
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return buf;
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}
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int rtnl_rtprot_a2n(uint32_t *id, char *arg)
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{
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static const char *cache = NULL;
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static unsigned long res;
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int i;
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if (cache && strcmp(cache, arg) == 0) {
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*id = res;
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return 0;
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}
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rtnl_rtprot_initialize();
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for (i = 0; i < 256; i++) {
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if (rtnl_rtprot_tab[i] &&
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strcmp(rtnl_rtprot_tab[i], arg) == 0) {
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cache = rtnl_rtprot_tab[i];
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res = i;
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*id = res;
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return 0;
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}
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}
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res = bb_strtoul(arg, NULL, 0);
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if (errno || res > 255)
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return -1;
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*id = res;
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return 0;
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}
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static const char **rtnl_rtscope_tab; /* [256] */
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static void rtnl_rtscope_initialize(void)
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{
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if (rtnl_rtscope_tab) return;
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rtnl_rtscope_tab = xzalloc(256 * sizeof(rtnl_rtscope_tab[0]));
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rtnl_rtscope_tab[0] = "global";
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rtnl_rtscope_tab[255] = "nowhere";
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rtnl_rtscope_tab[254] = "host";
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rtnl_rtscope_tab[253] = "link";
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rtnl_rtscope_tab[200] = "site";
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rtnl_tab_initialize("/etc/iproute2/rt_scopes",
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rtnl_rtscope_tab, 256);
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}
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const char* rtnl_rtscope_n2a(int id, char *buf, int len)
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{
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if (id < 0 || id >= 256) {
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snprintf(buf, len, "%d", id);
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return buf;
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}
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rtnl_rtscope_initialize();
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if (rtnl_rtscope_tab[id])
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return rtnl_rtscope_tab[id];
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snprintf(buf, len, "%d", id);
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return buf;
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}
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int rtnl_rtscope_a2n(uint32_t *id, char *arg)
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{
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static const char *cache = NULL;
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static unsigned long res;
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int i;
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if (cache && strcmp(cache, arg) == 0) {
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*id = res;
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return 0;
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}
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rtnl_rtscope_initialize();
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for (i = 0; i < 256; i++) {
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if (rtnl_rtscope_tab[i] &&
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strcmp(rtnl_rtscope_tab[i], arg) == 0) {
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cache = rtnl_rtscope_tab[i];
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res = i;
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*id = res;
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return 0;
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}
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}
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res = bb_strtoul(arg, NULL, 0);
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if (errno || res > 255)
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return -1;
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*id = res;
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return 0;
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}
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static const char **rtnl_rtrealm_tab; /* [256] */
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static void rtnl_rtrealm_initialize(void)
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{
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if (rtnl_rtrealm_tab) return;
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rtnl_rtrealm_tab = xzalloc(256 * sizeof(rtnl_rtrealm_tab[0]));
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rtnl_rtrealm_tab[0] = "unknown";
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rtnl_tab_initialize("/etc/iproute2/rt_realms",
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rtnl_rtrealm_tab, 256);
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}
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int rtnl_rtrealm_a2n(uint32_t *id, char *arg)
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{
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static const char *cache = NULL;
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static unsigned long res;
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int i;
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if (cache && strcmp(cache, arg) == 0) {
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*id = res;
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return 0;
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}
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rtnl_rtrealm_initialize();
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for (i = 0; i < 256; i++) {
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if (rtnl_rtrealm_tab[i] &&
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strcmp(rtnl_rtrealm_tab[i], arg) == 0) {
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cache = rtnl_rtrealm_tab[i];
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res = i;
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*id = res;
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return 0;
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}
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}
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res = bb_strtoul(arg, NULL, 0);
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if (errno || res > 255)
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return -1;
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*id = res;
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return 0;
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}
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#if ENABLE_FEATURE_IP_RULE
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const char* rtnl_rtrealm_n2a(int id, char *buf, int len)
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{
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if (id < 0 || id >= 256) {
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snprintf(buf, len, "%d", id);
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return buf;
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}
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rtnl_rtrealm_initialize();
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if (rtnl_rtrealm_tab[id])
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return rtnl_rtrealm_tab[id];
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snprintf(buf, len, "%d", id);
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return buf;
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}
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#endif
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static const char **rtnl_rtdsfield_tab; /* [256] */
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static void rtnl_rtdsfield_initialize(void)
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{
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if (rtnl_rtdsfield_tab) return;
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rtnl_rtdsfield_tab = xzalloc(256 * sizeof(rtnl_rtdsfield_tab[0]));
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rtnl_rtdsfield_tab[0] = "0";
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rtnl_tab_initialize("/etc/iproute2/rt_dsfield",
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rtnl_rtdsfield_tab, 256);
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}
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const char * rtnl_dsfield_n2a(int id, char *buf, int len)
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{
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if (id < 0 || id >= 256) {
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snprintf(buf, len, "%d", id);
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return buf;
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}
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rtnl_rtdsfield_initialize();
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if (rtnl_rtdsfield_tab[id])
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return rtnl_rtdsfield_tab[id];
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snprintf(buf, len, "0x%02x", id);
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return buf;
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}
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int rtnl_dsfield_a2n(uint32_t *id, char *arg)
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{
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static const char *cache = NULL;
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static unsigned long res;
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int i;
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if (cache && strcmp(cache, arg) == 0) {
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*id = res;
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return 0;
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}
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rtnl_rtdsfield_initialize();
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for (i = 0; i < 256; i++) {
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if (rtnl_rtdsfield_tab[i] &&
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strcmp(rtnl_rtdsfield_tab[i], arg) == 0) {
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cache = rtnl_rtdsfield_tab[i];
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res = i;
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*id = res;
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return 0;
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}
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}
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res = bb_strtoul(arg, NULL, 16);
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if (errno || res > 255)
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return -1;
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*id = res;
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return 0;
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}
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#if ENABLE_FEATURE_IP_RULE
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static const char **rtnl_rttable_tab; /* [256] */
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static void rtnl_rttable_initialize(void)
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{
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if (rtnl_rtdsfield_tab) return;
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rtnl_rttable_tab = xzalloc(256 * sizeof(rtnl_rttable_tab[0]));
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rtnl_rttable_tab[0] = "unspec";
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rtnl_rttable_tab[255] = "local";
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rtnl_rttable_tab[254] = "main";
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rtnl_rttable_tab[253] = "default";
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rtnl_tab_initialize("/etc/iproute2/rt_tables", rtnl_rttable_tab, 256);
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}
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const char *rtnl_rttable_n2a(int id, char *buf, int len)
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{
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if (id < 0 || id >= 256) {
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snprintf(buf, len, "%d", id);
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return buf;
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}
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rtnl_rttable_initialize();
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if (rtnl_rttable_tab[id])
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return rtnl_rttable_tab[id];
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snprintf(buf, len, "%d", id);
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return buf;
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}
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int rtnl_rttable_a2n(uint32_t * id, char *arg)
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{
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static char *cache = NULL;
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static unsigned long res;
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int i;
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if (cache && strcmp(cache, arg) == 0) {
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*id = res;
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return 0;
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}
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rtnl_rttable_initialize();
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for (i = 0; i < 256; i++) {
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if (rtnl_rttable_tab[i] && strcmp(rtnl_rttable_tab[i], arg) == 0) {
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cache = (char*)rtnl_rttable_tab[i];
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res = i;
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*id = res;
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return 0;
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}
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}
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i = bb_strtoul(arg, NULL, 0);
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if (errno || i > 255)
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return -1;
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*id = i;
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return 0;
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}
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#endif
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