diff options
author | norby <norby@openbsd.org> | 2006-10-18 16:15:25 +0000 |
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committer | norby <norby@openbsd.org> | 2006-10-18 16:15:25 +0000 |
commit | 8eeeb81e66eb2155c35a5cc113c5b8511e84c556 (patch) | |
tree | 2e2e1abca73c0c84a557f825215e14c3bbeb48fc /usr.sbin/ripctl/parser.c | |
parent | Welcome ripd (diff) | |
download | wireguard-openbsd-8eeeb81e66eb2155c35a5cc113c5b8511e84c556.tar.xz wireguard-openbsd-8eeeb81e66eb2155c35a5cc113c5b8511e84c556.zip |
Controller for the ripd.
All relevant information in the rip daemon can be displayed with this
controller.
Not connected to builds yet.
ok claudio@
Diffstat (limited to 'usr.sbin/ripctl/parser.c')
-rw-r--r-- | usr.sbin/ripctl/parser.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/usr.sbin/ripctl/parser.c b/usr.sbin/ripctl/parser.c new file mode 100644 index 00000000000..f6b18ed1349 --- /dev/null +++ b/usr.sbin/ripctl/parser.c @@ -0,0 +1,304 @@ +/* $OpenBSD: parser.c,v 1.1 2006/10/18 16:15:25 norby Exp $ */ + +/* + * Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it> + * 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 "ripd.h" + +#include "parser.h" + +enum token_type { + NOTOKEN, + ENDTOKEN, + KEYWORD, + ADDRESS, + FLAG, + PREFIX, + 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_db[]; +static const struct token t_show_area[]; +static const struct token t_show_nbr[]; +static const struct token t_show_rib[]; +static const struct token t_show_fib[]; + +static const struct token t_main[] = { +/* {KEYWORD, "reload", RELOAD, NULL}, */ + {KEYWORD, "fib", FIB, t_fib}, + {KEYWORD, "show", SHOW, t_show}, + {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, "neighbor", SHOW_NBR, t_show_nbr}, + {KEYWORD, "rib", SHOW_RIB, t_show_rib}, + {KEYWORD, "fib", SHOW_FIB, t_show_fib}, + {ENDTOKEN, "", NONE, NULL} +}; + +static const struct token t_show_iface[] = { + {NOTOKEN, "", NONE, NULL}, + {ENDTOKEN, "", NONE, NULL} +}; + +static const struct token t_show_nbr[] = { + {NOTOKEN, "", NONE, NULL}, + {ENDTOKEN, "", NONE, NULL} +}; + +static const struct token t_show_rib[] = { + {NOTOKEN, "", NONE, NULL}, + {ENDTOKEN, "", NONE, NULL} +}; + +static const struct token t_show_fib[] = { + {NOTOKEN, "", NONE, NULL}, + {KEYWORD, "interface", SHOW_FIB_IFACE, t_show_iface}, + {FLAG, "connected", F_CONNECTED, t_show_fib}, + {FLAG, "static", F_STATIC, t_show_fib}, + {FLAG, "rip", F_RIPD_INSERTED, t_show_fib}, + {ADDRESS, "", NONE, NULL}, + {ENDTOKEN, "", NONE, NULL} +}; + +static struct parse_result res; + +struct parse_result * +parse(int argc, char *argv[]) +{ + const struct token *table = t_main; + const struct token *match; + + bzero(&res, sizeof(res)); + + while (argc > 0) { + if ((match = match_token(argv[0], table)) == 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); +} + +const struct token * +match_token(const char *word, const struct token table[]) +{ + u_int 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 ADDRESS: + if (parse_addr(word, &res.addr)) { + match++; + t = &table[i]; + if (t->value) + res.action = t->value; + } + break; + case PREFIX: + if (parse_prefix(word, &res.addr, &res.prefixlen)) { + 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 (match > 1) + fprintf(stderr, "ambiguous argument: %s\n", word); + if (match < 1) + fprintf(stderr, "unknown argument: %s\n", word); + return (NULL); + } + + return (t); +} + +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 ADDRESS: + fprintf(stderr, " <address>\n"); + break; + case PREFIX: + fprintf(stderr, " <address>[/<len>]\n"); + break; + case IFNAME: + fprintf(stderr, " <interface>\n"); + case ENDTOKEN: + break; + } + } +} + +int +parse_addr(const char *word, struct in_addr *addr) +{ + struct in_addr ina; + + if (word == NULL) + return (0); + + bzero(addr, sizeof(struct in_addr)); + bzero(&ina, sizeof(ina)); + + if (inet_pton(AF_INET, word, &ina)) { + addr->s_addr = ina.s_addr; + return (1); + } + + return (0); +} + +int +parse_prefix(const char *word, struct in_addr *addr, u_int8_t *prefixlen) +{ + struct in_addr ina; + int bits = 32; + + if (word == NULL) + return (0); + + bzero(addr, sizeof(struct in_addr)); + bzero(&ina, sizeof(ina)); + + if (strrchr(word, '/') != NULL) { + if ((bits = inet_net_pton(AF_INET, word, + &ina, sizeof(ina))) == -1) + return (0); + addr->s_addr = ina.s_addr & htonl(prefixlen2mask(bits)); + *prefixlen = bits; + return (1); + } else { + *prefixlen = 32; + return (parse_addr(word, addr)); + } + + return (0); +} + +/* XXX local copy from kroute.c, should go to shared file */ +in_addr_t +prefixlen2mask(u_int8_t prefixlen) +{ + if (prefixlen == 0) + return (0); + + return (0xffffffff << (32 - prefixlen)); +} |