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117 lines
2.3 KiB
C
117 lines
2.3 KiB
C
/*
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* rtm_map.c
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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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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include "rt_names.h"
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#include "utils.h"
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char *rtnl_rtntype_n2a(int id, char *buf, int len)
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{
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switch (id) {
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case RTN_UNSPEC:
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return "none";
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case RTN_UNICAST:
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return "unicast";
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case RTN_LOCAL:
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return "local";
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case RTN_BROADCAST:
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return "broadcast";
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case RTN_ANYCAST:
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return "anycast";
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case RTN_MULTICAST:
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return "multicast";
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case RTN_BLACKHOLE:
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return "blackhole";
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case RTN_UNREACHABLE:
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return "unreachable";
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case RTN_PROHIBIT:
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return "prohibit";
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case RTN_THROW:
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return "throw";
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case RTN_NAT:
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return "nat";
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case RTN_XRESOLVE:
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return "xresolve";
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default:
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snprintf(buf, len, "%d", id);
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return buf;
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}
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}
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int rtnl_rtntype_a2n(int *id, char *arg)
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{
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char *end;
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unsigned long res;
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if (strcmp(arg, "local") == 0)
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res = RTN_LOCAL;
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else if (strcmp(arg, "nat") == 0)
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res = RTN_NAT;
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else if (matches(arg, "broadcast") == 0 ||
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strcmp(arg, "brd") == 0)
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res = RTN_BROADCAST;
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else if (matches(arg, "anycast") == 0)
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res = RTN_ANYCAST;
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else if (matches(arg, "multicast") == 0)
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res = RTN_MULTICAST;
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else if (matches(arg, "prohibit") == 0)
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res = RTN_PROHIBIT;
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else if (matches(arg, "unreachable") == 0)
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res = RTN_UNREACHABLE;
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else if (matches(arg, "blackhole") == 0)
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res = RTN_BLACKHOLE;
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else if (matches(arg, "xresolve") == 0)
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res = RTN_XRESOLVE;
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else if (matches(arg, "unicast") == 0)
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res = RTN_UNICAST;
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else if (strcmp(arg, "throw") == 0)
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res = RTN_THROW;
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else {
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res = strtoul(arg, &end, 0);
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if (!end || end == arg || *end || res > 255)
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return -1;
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}
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*id = res;
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return 0;
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}
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int get_rt_realms(__u32 *realms, char *arg)
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{
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__u32 realm = 0;
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char *p = strchr(arg, '/');
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*realms = 0;
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if (p) {
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*p = 0;
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if (rtnl_rtrealm_a2n(realms, arg)) {
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*p = '/';
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return -1;
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}
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*realms <<= 16;
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*p = '/';
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arg = p+1;
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}
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if (*arg && rtnl_rtrealm_a2n(&realm, arg))
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return -1;
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*realms |= realm;
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return 0;
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}
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