File: [local] / src / usr.sbin / ldpctl / parser.c (download)
Revision 1.12, Mon May 23 19:06:03 2016 UTC (8 years ago) by renato
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, HEAD Changes since 1.11: +15 -1 lines
Introduce the 'ldpctl clear neighbors' command.
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/* $OpenBSD: parser.c,v 1.12 2016/05/23 19:06:03 renato Exp $ */
/*
* Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include "ldpd.h"
#include "parser.h"
enum token_type {
NOTOKEN,
ENDTOKEN,
KEYWORD,
FAMILY,
ADDRESS,
FLAG,
IFNAME
};
struct token {
enum token_type type;
const char *keyword;
int value;
const struct token *next;
};
static const struct token t_main[];
static const struct token t_fib[];
static const struct token t_show[];
static const struct token t_show_iface[];
static const struct token t_show_iface_af[];
static const struct token t_show_disc[];
static const struct token t_show_disc_af[];
static const struct token t_show_nbr[];
static const struct token t_show_nbr_af[];
static const struct token t_show_lib[];
static const struct token t_show_lib_af[];
static const struct token t_show_fib[];
static const struct token t_show_fib_af[];
static const struct token t_show_l2vpn[];
static const struct token t_clear[];
static const struct token t_clear_nbr[];
static const struct token t_log[];
static const struct token t_main[] = {
{KEYWORD, "reload", RELOAD, NULL},
{KEYWORD, "fib", FIB, t_fib},
{KEYWORD, "show", SHOW, t_show},
{KEYWORD, "clear", CLEAR_NBR, t_clear},
{KEYWORD, "log", NONE, t_log},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_fib[] = {
{ KEYWORD, "couple", FIB_COUPLE, NULL},
{ KEYWORD, "decouple", FIB_DECOUPLE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "interfaces", SHOW_IFACE, t_show_iface},
{KEYWORD, "discovery", SHOW_DISC, t_show_disc},
{KEYWORD, "neighbor", SHOW_NBR, t_show_nbr},
{KEYWORD, "lib", SHOW_LIB, t_show_lib},
{KEYWORD, "fib", SHOW_FIB, t_show_fib},
{KEYWORD, "l2vpn", NONE, t_show_l2vpn},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_iface[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "family", NONE, t_show_iface_af},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_iface_af[] = {
{FAMILY, "", NONE, t_show_iface},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_disc[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "family", NONE, t_show_disc_af},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_disc_af[] = {
{FAMILY, "", NONE, t_show_disc},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_nbr[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "family", NONE, t_show_nbr_af},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_nbr_af[] = {
{FAMILY, "", NONE, t_show_nbr},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_lib[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "family", NONE, t_show_lib_af},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_lib_af[] = {
{FAMILY, "", NONE, t_show_lib},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_fib[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "family", NONE, t_show_fib_af},
{KEYWORD, "interface", SHOW_FIB_IFACE, t_show_iface},
{FLAG, "connected", F_CONNECTED, t_show_fib},
{FLAG, "static", F_STATIC, t_show_fib},
{ADDRESS, "", NONE, NULL},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_fib_af[] = {
{FAMILY, "", NONE, t_show_fib},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_l2vpn[] = {
{KEYWORD, "bindings", SHOW_L2VPN_BINDING, NULL},
{KEYWORD, "pseudowires", SHOW_L2VPN_PW, NULL},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_clear[] = {
{KEYWORD, "neighbors", CLEAR_NBR, t_clear_nbr},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_clear_nbr[] = {
{NOTOKEN, "", NONE, NULL},
{ADDRESS, "", NONE, NULL},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_log[] = {
{KEYWORD, "verbose", LOG_VERBOSE, NULL},
{KEYWORD, "brief", LOG_BRIEF, NULL},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token *match_token(const char *, const struct token *,
struct parse_result *);
static void show_valid_args(const struct token *);
struct parse_result *
parse(int argc, char *argv[])
{
static struct parse_result res;
const struct token *table = t_main;
const struct token *match;
memset(&res, 0, sizeof(res));
while (argc >= 0) {
if ((match = match_token(argv[0], table, &res)) == NULL) {
fprintf(stderr, "valid commands/args:\n");
show_valid_args(table);
return (NULL);
}
argc--;
argv++;
if (match->type == NOTOKEN || match->next == NULL)
break;
table = match->next;
}
if (argc > 0) {
fprintf(stderr, "superfluous argument: %s\n", argv[0]);
return (NULL);
}
return (&res);
}
static const struct token *
match_token(const char *word, const struct token *table,
struct parse_result *res)
{
uint i, match;
const struct token *t = NULL;
match = 0;
for (i = 0; table[i].type != ENDTOKEN; i++) {
switch (table[i].type) {
case NOTOKEN:
if (word == NULL || strlen(word) == 0) {
match++;
t = &table[i];
}
break;
case KEYWORD:
if (word != NULL && strncmp(word, table[i].keyword,
strlen(word)) == 0) {
match++;
t = &table[i];
if (t->value)
res->action = t->value;
}
break;
case FLAG:
if (word != NULL && strncmp(word, table[i].keyword,
strlen(word)) == 0) {
match++;
t = &table[i];
res->flags |= t->value;
}
break;
case FAMILY:
if (word == NULL)
break;
if (!strcmp(word, "inet") ||
!strcasecmp(word, "IPv4")) {
match++;
t = &table[i];
res->family = AF_INET;
}
if (!strcmp(word, "inet6") ||
!strcasecmp(word, "IPv6")) {
match++;
t = &table[i];
res->family = AF_INET6;
}
break;
case ADDRESS:
if (parse_addr(word, &res->family, &res->addr)) {
match++;
t = &table[i];
if (t->value)
res->action = t->value;
}
break;
case IFNAME:
if (!match && word != NULL && strlen(word) > 0) {
if (strlcpy(res->ifname, word,
sizeof(res->ifname)) >=
sizeof(res->ifname))
err(1, "interface name too long");
match++;
t = &table[i];
if (t->value)
res->action = t->value;
}
break;
case ENDTOKEN:
break;
}
}
if (match != 1) {
if (word == NULL)
fprintf(stderr, "missing argument:\n");
else if (match > 1)
fprintf(stderr, "ambiguous argument: %s\n", word);
else if (match < 1)
fprintf(stderr, "unknown argument: %s\n", word);
return (NULL);
}
return (t);
}
static void
show_valid_args(const struct token *table)
{
int i;
for (i = 0; table[i].type != ENDTOKEN; i++) {
switch (table[i].type) {
case NOTOKEN:
fprintf(stderr, " <cr>\n");
break;
case KEYWORD:
case FLAG:
fprintf(stderr, " %s\n", table[i].keyword);
break;
case FAMILY:
fprintf(stderr, " [ inet | inet6 | IPv4 | IPv6 ]\n");
break;
case ADDRESS:
fprintf(stderr, " <address>\n");
break;
case IFNAME:
fprintf(stderr, " <interface>\n");
case ENDTOKEN:
break;
}
}
}
int
parse_addr(const char *word, int *family, union ldpd_addr *addr)
{
struct in_addr ina;
struct addrinfo hints, *r;
struct sockaddr_in6 *sa_in6;
if (word == NULL)
return (0);
memset(addr, 0, sizeof(*addr));
memset(&ina, 0, sizeof(ina));
if (inet_net_pton(AF_INET, word, &ina, sizeof(ina)) != -1) {
*family = AF_INET;
addr->v4.s_addr = ina.s_addr;
return (1);
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
hints.ai_flags = AI_NUMERICHOST;
if (getaddrinfo(word, "0", &hints, &r) == 0) {
sa_in6 = (struct sockaddr_in6 *)r->ai_addr;
*family = AF_INET6;
addr->v6 = sa_in6->sin6_addr;
freeaddrinfo(r);
return (1);
}
return (0);
}