File: [local] / src / usr.sbin / bgpctl / parser.c (download)
Revision 1.134, Mon Nov 20 14:18:21 2023 UTC (6 months, 2 weeks ago) by claudio
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, HEAD
Changes since 1.133: +3 -3 lines
KNF
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/* $OpenBSD: parser.c,v 1.134 2023/11/20 14:18:21 claudio Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2016 Job Snijders <job@instituut.net>
* Copyright (c) 2016 Peter Hessler <phessler@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 <endian.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "parser.h"
enum token_type {
ENDTOKEN,
NOTOKEN,
ANYTOKEN,
KEYWORD,
ADDRESS,
PEERADDRESS,
FLAG,
ASNUM,
ASTYPE,
PREFIX,
PEERDESC,
GROUPDESC,
RIBNAME,
COMMUNICATION,
COMMUNITY,
EXTCOMMUNITY,
LRGCOMMUNITY,
LOCALPREF,
MED,
NEXTHOP,
PFTABLE,
PREPNBR,
PREPSELF,
WEIGHT,
RD,
FAMILY,
RTABLE,
FILENAME,
PATHID,
FLOW_PROTO,
FLOW_SRC,
FLOW_DST,
FLOW_SRCPORT,
FLOW_DSTPORT,
FLOW_ICMPTYPE,
FLOW_ICMPCODE,
FLOW_LENGTH,
FLOW_DSCP,
FLOW_FLAGS,
FLOW_FRAGS,
};
struct token {
enum token_type type;
const char *keyword;
int value;
const struct token *next;
};
static const struct token *prevtable;
static const struct token t_main[];
static const struct token t_show[];
static const struct token t_show_summary[];
static const struct token t_show_fib[];
static const struct token t_show_rib[];
static const struct token t_show_avs[];
static const struct token t_show_ovs[];
static const struct token t_show_mrt[];
static const struct token t_show_mrt_file[];
static const struct token t_show_rib_neigh[];
static const struct token t_show_mrt_neigh[];
static const struct token t_show_rib_rib[];
static const struct token t_show_neighbor[];
static const struct token t_show_neighbor_modifiers[];
static const struct token t_fib[];
static const struct token t_neighbor[];
static const struct token t_neighbor_modifiers[];
static const struct token t_show_rib_as[];
static const struct token t_show_mrt_as[];
static const struct token t_show_prefix[];
static const struct token t_show_ip[];
static const struct token t_network[];
static const struct token t_flowspec[];
static const struct token t_flowfamily[];
static const struct token t_flowrule[];
static const struct token t_flowsrc[];
static const struct token t_flowdst[];
static const struct token t_flowsrcport[];
static const struct token t_flowdstport[];
static const struct token t_flowicmp[];
static const struct token t_bulk[];
static const struct token t_network_show[];
static const struct token t_prefix[];
static const struct token t_set[];
static const struct token t_nexthop[];
static const struct token t_pftable[];
static const struct token t_log[];
static const struct token t_communication[];
static const struct token t_main[] = {
{ KEYWORD, "fib", FIB, t_fib},
{ KEYWORD, "flowspec", NONE, t_flowspec},
{ KEYWORD, "log", NONE, t_log},
{ KEYWORD, "neighbor", NEIGHBOR, t_neighbor},
{ KEYWORD, "network", NONE, t_network},
{ KEYWORD, "reload", RELOAD, t_communication},
{ KEYWORD, "show", SHOW, t_show},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show[] = {
{ NOTOKEN, "", NONE, NULL},
{ KEYWORD, "fib", SHOW_FIB, t_show_fib},
{ KEYWORD, "flowspec", FLOWSPEC_SHOW, t_network_show},
{ KEYWORD, "interfaces", SHOW_INTERFACE, NULL},
{ KEYWORD, "ip", NONE, t_show_ip},
{ KEYWORD, "metrics", SHOW_METRICS, NULL},
{ KEYWORD, "mrt", SHOW_MRT, t_show_mrt},
{ KEYWORD, "neighbor", SHOW_NEIGHBOR, t_show_neighbor},
{ KEYWORD, "network", NETWORK_SHOW, t_network_show},
{ KEYWORD, "nexthop", SHOW_NEXTHOP, NULL},
{ KEYWORD, "rib", SHOW_RIB, t_show_rib},
{ KEYWORD, "rtr", SHOW_RTR, NULL},
{ KEYWORD, "sets", SHOW_SET, NULL},
{ KEYWORD, "summary", SHOW_SUMMARY, t_show_summary},
{ KEYWORD, "tables", SHOW_FIB_TABLES, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_summary[] = {
{ NOTOKEN, "", NONE, NULL},
{ KEYWORD, "terse", SHOW_SUMMARY_TERSE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_fib[] = {
{ NOTOKEN, "", NONE, NULL},
{ FLAG, "bgp", F_BGPD, t_show_fib},
{ FLAG, "connected", F_CONNECTED, t_show_fib},
{ FLAG, "nexthop", F_NEXTHOP, t_show_fib},
{ FLAG, "static", F_STATIC, t_show_fib},
{ RTABLE, "table", NONE, t_show_fib},
{ FAMILY, "", NONE, t_show_fib},
{ ADDRESS, "", NONE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_rib[] = {
{ NOTOKEN, "", NONE, NULL},
{ ASTYPE, "as", AS_ALL, t_show_rib_as},
{ KEYWORD, "avs", NONE, t_show_avs},
{ FLAG, "best", F_CTL_BEST, t_show_rib},
{ COMMUNITY, "community", NONE, t_show_rib},
{ FLAG, "detail", F_CTL_DETAIL, t_show_rib},
{ FLAG, "disqualified", F_CTL_INELIGIBLE, t_show_rib},
{ ASTYPE, "empty-as", AS_EMPTY, t_show_rib},
{ FLAG, "error", F_CTL_INVALID, t_show_rib},
{ EXTCOMMUNITY, "ext-community", NONE, t_show_rib},
{ FLAG, "in", F_CTL_ADJ_IN, t_show_rib},
{ LRGCOMMUNITY, "large-community", NONE, t_show_rib},
{ FLAG, "leaked", F_CTL_LEAKED, t_show_rib},
{ KEYWORD, "memory", SHOW_RIB_MEM, NULL},
{ KEYWORD, "neighbor", NONE, t_show_rib_neigh},
{ FLAG, "out", F_CTL_ADJ_OUT, t_show_rib},
{ KEYWORD, "ovs", NONE, t_show_ovs},
{ PATHID, "path-id", NONE, t_show_rib},
{ ASTYPE, "peer-as", AS_PEER, t_show_rib_as},
{ FLAG, "selected", F_CTL_BEST, t_show_rib},
{ ASTYPE, "source-as", AS_SOURCE, t_show_rib_as},
{ FLAG, "ssv", F_CTL_SSV, t_show_rib},
{ KEYWORD, "summary", SHOW_SUMMARY, t_show_summary},
{ KEYWORD, "table", NONE, t_show_rib_rib},
{ ASTYPE, "transit-as", AS_TRANSIT, t_show_rib_as},
{ FAMILY, "", NONE, t_show_rib},
{ PREFIX, "", NONE, t_show_prefix},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_avs[] = {
{ FLAG, "invalid", F_CTL_AVS_INVALID, t_show_rib},
{ FLAG, "unknown", F_CTL_AVS_UNKNOWN, t_show_rib},
{ FLAG, "valid" , F_CTL_AVS_VALID, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_ovs[] = {
{ FLAG, "invalid", F_CTL_OVS_INVALID, t_show_rib},
{ FLAG, "not-found", F_CTL_OVS_NOTFOUND, t_show_rib},
{ FLAG, "valid" , F_CTL_OVS_VALID, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_mrt[] = {
{ NOTOKEN, "", NONE, NULL},
{ ASTYPE, "as", AS_ALL, t_show_mrt_as},
{ FLAG, "detail", F_CTL_DETAIL, t_show_mrt},
{ ASTYPE, "empty-as", AS_EMPTY, t_show_mrt},
{ KEYWORD, "file", NONE, t_show_mrt_file},
{ KEYWORD, "neighbor", NONE, t_show_mrt_neigh},
{ ASTYPE, "peer-as", AS_PEER, t_show_mrt_as},
{ FLAG, "peers", F_CTL_NEIGHBORS,t_show_mrt},
{ ASTYPE, "source-as", AS_SOURCE, t_show_mrt_as},
{ FLAG, "ssv", F_CTL_SSV, t_show_mrt},
{ ASTYPE, "transit-as", AS_TRANSIT, t_show_mrt_as},
{ FAMILY, "", NONE, t_show_mrt},
{ PREFIX, "", NONE, t_show_prefix},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_mrt_file[] = {
{ FILENAME, "", NONE, t_show_mrt},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_rib_neigh_group[] = {
{ GROUPDESC, "", NONE, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_rib_neigh[] = {
{ KEYWORD, "group", NONE, t_show_rib_neigh_group},
{ PEERADDRESS, "", NONE, t_show_rib},
{ PEERDESC, "", NONE, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_mrt_neigh[] = {
{ PEERADDRESS, "", NONE, t_show_mrt},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_rib_rib[] = {
{ RIBNAME, "", NONE, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_neighbor_modifiers[] = {
{ NOTOKEN, "", NONE, NULL},
{ KEYWORD, "messages", SHOW_NEIGHBOR, NULL},
{ KEYWORD, "terse", SHOW_NEIGHBOR_TERSE, NULL},
{ KEYWORD, "timers", SHOW_NEIGHBOR_TIMERS, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_neighbor_group[] = {
{ GROUPDESC, "", NONE, t_show_neighbor_modifiers},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_neighbor[] = {
{ NOTOKEN, "", NONE, NULL},
{ KEYWORD, "group", NONE, t_show_neighbor_group},
{ PEERADDRESS, "", NONE, t_show_neighbor_modifiers},
{ PEERDESC, "", NONE, t_show_neighbor_modifiers},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_fib[] = {
{ KEYWORD, "couple", FIB_COUPLE, NULL},
{ KEYWORD, "decouple", FIB_DECOUPLE, NULL},
{ RTABLE, "table", NONE, t_fib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_neighbor_group[] = {
{ GROUPDESC, "", NONE, t_neighbor_modifiers},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_neighbor[] = {
{ KEYWORD, "group", NONE, t_neighbor_group},
{ PEERADDRESS, "", NONE, t_neighbor_modifiers},
{ PEERDESC, "", NONE, t_neighbor_modifiers},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_communication[] = {
{ NOTOKEN, "", NONE, NULL},
{ COMMUNICATION, "", NONE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_neighbor_modifiers[] = {
{ KEYWORD, "clear", NEIGHBOR_CLEAR, t_communication},
{ KEYWORD, "destroy", NEIGHBOR_DESTROY, NULL},
{ KEYWORD, "down", NEIGHBOR_DOWN, t_communication},
{ KEYWORD, "refresh", NEIGHBOR_RREFRESH, NULL},
{ KEYWORD, "up", NEIGHBOR_UP, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_rib_as[] = {
{ ASNUM, "", NONE, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_mrt_as[] = {
{ ASNUM, "", NONE, t_show_mrt},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_prefix[] = {
{ FLAG, "all", F_LONGER, t_show_rib},
{ FLAG, "longer-prefixes", F_LONGER, t_show_rib},
{ FLAG, "or-longer", F_LONGER, t_show_rib},
{ FLAG, "or-shorter", F_SHORTER, t_show_rib},
{ ANYTOKEN, "", NONE, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_show_ip[] = {
{ KEYWORD, "bgp", SHOW_RIB, t_show_rib},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_network[] = {
{ KEYWORD, "add", NETWORK_ADD, t_prefix},
{ KEYWORD, "bulk", NONE, t_bulk},
{ KEYWORD, "delete", NETWORK_REMOVE, t_prefix},
{ KEYWORD, "flush", NETWORK_FLUSH, NULL},
{ KEYWORD, "mrt", NETWORK_MRT, t_show_mrt},
{ KEYWORD, "show", NETWORK_SHOW, t_network_show},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowspec[] = {
{ KEYWORD, "add", FLOWSPEC_ADD, t_flowfamily},
{ KEYWORD, "delete", FLOWSPEC_REMOVE,t_flowfamily},
{ KEYWORD, "flush", FLOWSPEC_FLUSH, NULL},
{ KEYWORD, "show", FLOWSPEC_SHOW, t_network_show},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowfamily[] = {
{ FAMILY, "", NONE, t_flowrule},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowrule[] = {
{ NOTOKEN, "", NONE, NULL},
{ FLOW_FLAGS, "flags", NONE, t_flowrule},
{ FLOW_FRAGS, "fragment", NONE, t_flowrule},
{ KEYWORD, "from", NONE, t_flowsrc},
{ FLOW_ICMPTYPE,"icmp-type", NONE, t_flowicmp},
{ FLOW_LENGTH, "length", NONE, t_flowrule},
{ FLOW_PROTO, "proto", NONE, t_flowrule},
{ KEYWORD, "set", NONE, t_set},
{ KEYWORD, "to", NONE, t_flowdst},
{ FLOW_DSCP, "dscp", NONE, t_flowrule},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowsrc[] = {
{ KEYWORD, "any", NONE, t_flowsrcport},
{ FLOW_SRC, "", NONE, t_flowsrcport},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowdst[] = {
{ KEYWORD, "any", NONE, t_flowdstport},
{ FLOW_DST, "", NONE, t_flowdstport},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowsrcport[] = {
{ FLOW_SRCPORT, "port", NONE, t_flowrule},
{ ANYTOKEN, "", NONE, t_flowrule},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowdstport[] = {
{ FLOW_DSTPORT, "port", NONE, t_flowrule},
{ ANYTOKEN, "", NONE, t_flowrule},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_flowicmp[] = {
{ FLOW_ICMPCODE,"code", NONE, t_flowrule},
{ ANYTOKEN, "", NONE, t_flowrule},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_bulk[] = {
{ KEYWORD, "add", NETWORK_BULK_ADD, t_set},
{ KEYWORD, "delete", NETWORK_BULK_REMOVE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_prefix[] = {
{ PREFIX, "", NONE, t_set},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_network_show[] = {
{ NOTOKEN, "", NONE, NULL},
{ FAMILY, "", NONE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_rd[] = {
{ RD, "", NONE, t_set},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_set[] = {
{ NOTOKEN, "", NONE, NULL},
{ COMMUNITY, "community", NONE, t_set},
{ EXTCOMMUNITY, "ext-community", NONE, t_set},
{ LRGCOMMUNITY, "large-community", NONE, t_set},
{ LOCALPREF, "localpref", NONE, t_set},
{ MED, "med", NONE, t_set},
{ MED, "metric", NONE, t_set},
{ KEYWORD, "nexthop", NONE, t_nexthop},
{ KEYWORD, "pftable", NONE, t_pftable},
{ PREPNBR, "prepend-neighbor", NONE, t_set},
{ PREPSELF, "prepend-self", NONE, t_set},
{ KEYWORD, "rd", NONE, t_rd},
{ WEIGHT, "weight", NONE, t_set},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_nexthop[] = {
{ NEXTHOP, "", NONE, t_set},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_pftable[] = {
{ PFTABLE, "", NONE, t_set},
{ ENDTOKEN, "", NONE, NULL}
};
static const struct token t_log[] = {
{ KEYWORD, "brief", LOG_BRIEF, NULL},
{ KEYWORD, "verbose", LOG_VERBOSE, NULL},
{ ENDTOKEN, "", NONE, NULL}
};
static struct parse_result res;
const struct token *match_token(int, char *[], const struct token [],
int *);
void show_valid_args(const struct token []);
int parse_addr(const char *, struct bgpd_addr *);
int parse_asnum(const char *, size_t, uint32_t *);
int parse_number(const char *, struct parse_result *, enum token_type);
void parsecommunity(struct community *c, char *s);
void parselargecommunity(struct community *c, char *s);
void parseextcommunity(struct community *c, const char *t, char *s);
int parse_nexthop(const char *, struct parse_result *);
int parse_flow_numop(int, char *[], struct parse_result *, enum token_type);
struct parse_result *
parse(int argc, char *argv[])
{
const struct token *table = t_main;
const struct token *match;
int used;
memset(&res, 0, sizeof(res));
res.rtableid = getrtable();
TAILQ_INIT(&res.set);
while (argc >= 0) {
if ((match = match_token(argc, argv, table, &used)) == NULL) {
fprintf(stderr, "valid commands/args:\n");
show_valid_args(table);
return (NULL);
}
if (match->type == ANYTOKEN) {
if (prevtable == NULL)
prevtable = table;
table = match->next;
continue;
}
argc -= used;
argv += used;
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(int argc, char *argv[], const struct token table[], int *argsused)
{
u_int i, match;
const struct token *t = NULL;
struct filter_set *fs;
const char *word = argv[0];
size_t wordlen = 0;
*argsused = 1;
match = 0;
if (word != NULL)
wordlen = strlen(word);
for (i = 0; table[i].type != ENDTOKEN; i++) {
switch (table[i].type) {
case NOTOKEN:
if (word == NULL || wordlen == 0) {
match++;
t = &table[i];
}
break;
case ANYTOKEN:
/* match anything if nothing else matched before */
if (match == 0) {
match++;
t = &table[i];
}
break;
case KEYWORD:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0) {
match++;
t = &table[i];
if (t->value)
res.action = t->value;
}
break;
case FLAG:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 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.aid = AID_INET;
}
if (!strcmp(word, "inet6") ||
!strcasecmp(word, "IPv6")) {
match++;
t = &table[i];
res.aid = AID_INET6;
}
if (!strcasecmp(word, "VPNv4")) {
match++;
t = &table[i];
res.aid = AID_VPN_IPv4;
}
if (!strcasecmp(word, "VPNv6")) {
match++;
t = &table[i];
res.aid = AID_VPN_IPv6;
}
break;
case ADDRESS:
if (parse_addr(word, &res.addr)) {
match++;
t = &table[i];
}
break;
case PEERADDRESS:
if (parse_addr(word, &res.peeraddr)) {
match++;
t = &table[i];
}
break;
case FLOW_SRC:
if (parse_prefix(word, wordlen, &res.flow.src,
&res.flow.srclen)) {
match++;
t = &table[i];
if (res.aid != res.flow.src.aid)
errx(1, "wrong address family in "
"flowspec rule");
}
break;
case FLOW_DST:
if (parse_prefix(word, wordlen, &res.flow.dst,
&res.flow.dstlen)) {
match++;
t = &table[i];
if (res.aid != res.flow.dst.aid)
errx(1, "wrong address family in "
"flowspec rule");
}
break;
case PREFIX:
if (parse_prefix(word, wordlen, &res.addr,
&res.prefixlen)) {
match++;
t = &table[i];
}
break;
case ASTYPE:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0) {
match++;
t = &table[i];
res.as.type = t->value;
}
break;
case ASNUM:
if (parse_asnum(word, wordlen, &res.as.as_min)) {
res.as.as_max = res.as.as_min;
match++;
t = &table[i];
}
break;
case GROUPDESC:
res.is_group = 1;
/* FALLTHROUGH */
case PEERDESC:
if (!match && word != NULL && wordlen > 0) {
if (strlcpy(res.peerdesc, word,
sizeof(res.peerdesc)) >=
sizeof(res.peerdesc))
errx(1, "neighbor description too "
"long");
match++;
t = &table[i];
}
break;
case RIBNAME:
if (!match && word != NULL && wordlen > 0) {
if (strlcpy(res.rib, word, sizeof(res.rib)) >=
sizeof(res.rib))
errx(1, "rib name too long");
match++;
t = &table[i];
}
break;
case COMMUNICATION:
if (!match && word != NULL && wordlen > 0) {
if (strlcpy(res.reason, word,
sizeof(res.reason)) >=
sizeof(res.reason))
errx(1, "shutdown reason too long");
match++;
t = &table[i];
}
break;
case COMMUNITY:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0 && argc > 1) {
parsecommunity(&res.community, argv[1]);
*argsused += 1;
if ((fs = calloc(1, sizeof(*fs))) == NULL)
err(1, NULL);
fs->type = ACTION_SET_COMMUNITY;
fs->action.community = res.community;
TAILQ_INSERT_TAIL(&res.set, fs, entry);
match++;
t = &table[i];
}
break;
case LRGCOMMUNITY:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0 && argc > 1) {
parselargecommunity(&res.community, argv[1]);
*argsused += 1;
if ((fs = calloc(1, sizeof(*fs))) == NULL)
err(1, NULL);
fs->type = ACTION_SET_COMMUNITY;
fs->action.community = res.community;
TAILQ_INSERT_TAIL(&res.set, fs, entry);
match++;
t = &table[i];
}
break;
case EXTCOMMUNITY:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0 && argc > 2) {
parseextcommunity(&res.community,
argv[1], argv[2]);
*argsused += 2;
if ((fs = calloc(1, sizeof(*fs))) == NULL)
err(1, NULL);
fs->type = ACTION_SET_COMMUNITY;
fs->action.community = res.community;
TAILQ_INSERT_TAIL(&res.set, fs, entry);
match++;
t = &table[i];
}
break;
case RD:
if (word != NULL && wordlen > 0) {
char *p = strdup(word);
struct community ext = { 0 };
uint64_t rd;
if (p == NULL)
err(1, NULL);
parseextcommunity(&ext, "rt", p);
free(p);
switch (ext.data3 >> 8) {
case EXT_COMMUNITY_TRANS_TWO_AS:
rd = (0ULL << 48);
rd |= ((uint64_t)ext.data1 & 0xffff)
<< 32;
rd |= (uint64_t)ext.data2;
break;
case EXT_COMMUNITY_TRANS_IPV4:
rd = (1ULL << 48);
rd |= (uint64_t)ext.data1 << 16;
rd |= (uint64_t)ext.data2 & 0xffff;
break;
case EXT_COMMUNITY_TRANS_FOUR_AS:
rd = (2ULL << 48);
rd |= (uint64_t)ext.data1 << 16;
rd |= (uint64_t)ext.data2 & 0xffff;
break;
default:
errx(1, "bad encoding of rd");
}
res.rd = htobe64(rd);
match++;
t = &table[i];
}
break;
case LOCALPREF:
case MED:
case PREPNBR:
case PREPSELF:
case WEIGHT:
case RTABLE:
case PATHID:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0 && argc > 1 &&
parse_number(argv[1], &res, table[i].type)) {
*argsused += 1;
match++;
t = &table[i];
}
break;
case NEXTHOP:
if (word != NULL && wordlen > 0 &&
parse_nexthop(word, &res)) {
match++;
t = &table[i];
}
break;
case PFTABLE:
if (word != NULL && wordlen > 0) {
if ((fs = calloc(1,
sizeof(struct filter_set))) == NULL)
err(1, NULL);
if (strlcpy(fs->action.pftable, word,
sizeof(fs->action.pftable)) >=
sizeof(fs->action.pftable))
errx(1, "pftable name too long");
TAILQ_INSERT_TAIL(&res.set, fs, entry);
match++;
t = &table[i];
}
break;
case FILENAME:
if (word != NULL && wordlen > 0) {
if ((res.mrtfd = open(word, O_RDONLY)) == -1) {
/*
* ignore error if path has no / and
* does not exist. In hope to print
* usage.
*/
if (errno == ENOENT &&
!strchr(word, '/'))
break;
err(1, "mrt open(%s)", word);
}
match++;
t = &table[i];
}
break;
case FLOW_SRCPORT:
case FLOW_DSTPORT:
case FLOW_PROTO:
case FLOW_ICMPTYPE:
case FLOW_ICMPCODE:
case FLOW_LENGTH:
case FLOW_DSCP:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0 && argc > 1) {
*argsused += parse_flow_numop(argc, argv, &res,
table[i].type);
match++;
t = &table[i];
}
break;
case FLOW_FLAGS:
case FLOW_FRAGS:
if (word != NULL && strncmp(word, table[i].keyword,
wordlen) == 0) {
errx(1, "%s not yet implemented", word);
}
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);
}
void
show_valid_args(const struct token table[])
{
int i;
if (prevtable != NULL) {
const struct token *t = prevtable;
prevtable = NULL;
show_valid_args(t);
fprintf(stderr, "or any of\n");
}
for (i = 0; table[i].type != ENDTOKEN; i++) {
switch (table[i].type) {
case NOTOKEN:
fprintf(stderr, " <cr>\n");
break;
case ANYTOKEN:
break;
case KEYWORD:
case FLAG:
case ASTYPE:
fprintf(stderr, " %s\n", table[i].keyword);
break;
case ADDRESS:
case PEERADDRESS:
fprintf(stderr, " <address>\n");
break;
case PREFIX:
case FLOW_SRC:
case FLOW_DST:
fprintf(stderr, " <address>[/<len>]\n");
break;
case ASNUM:
fprintf(stderr, " <asnum>\n");
break;
case GROUPDESC:
case PEERDESC:
fprintf(stderr, " <neighbor description>\n");
break;
case RIBNAME:
fprintf(stderr, " <rib name>\n");
break;
case COMMUNICATION:
fprintf(stderr, " <reason>\n");
break;
case COMMUNITY:
fprintf(stderr, " %s <community>\n",
table[i].keyword);
break;
case LRGCOMMUNITY:
fprintf(stderr, " %s <large-community>\n",
table[i].keyword);
break;
case EXTCOMMUNITY:
fprintf(stderr, " %s <extended-community>\n",
table[i].keyword);
break;
case RD:
fprintf(stderr, " <route-distinguisher>\n");
break;
case LOCALPREF:
case MED:
case PREPNBR:
case PREPSELF:
case WEIGHT:
case RTABLE:
case PATHID:
fprintf(stderr, " %s <number>\n", table[i].keyword);
break;
case NEXTHOP:
fprintf(stderr, " <address>\n");
break;
case PFTABLE:
fprintf(stderr, " <pftable>\n");
break;
case FAMILY:
fprintf(stderr, " [ inet | inet6 | IPv4 | IPv6 | "
"VPNv4 | VPNv6 ]\n");
break;
case FILENAME:
fprintf(stderr, " <filename>\n");
break;
case FLOW_SRCPORT:
case FLOW_DSTPORT:
case FLOW_PROTO:
case FLOW_ICMPTYPE:
case FLOW_ICMPCODE:
case FLOW_LENGTH:
case FLOW_DSCP:
fprintf(stderr, " %s <numberspec>\n",
table[i].keyword);
break;
case FLOW_FLAGS:
case FLOW_FRAGS:
fprintf(stderr, " %s <flagspec>\n",
table[i].keyword);
break;
case ENDTOKEN:
break;
}
}
}
int
parse_addr(const char *word, struct bgpd_addr *addr)
{
struct in_addr ina;
struct addrinfo hints, *r;
if (word == NULL)
return (0);
memset(&ina, 0, sizeof(ina));
if (inet_net_pton(AF_INET, word, &ina, sizeof(ina)) != -1) {
memset(addr, 0, sizeof(*addr));
addr->aid = AID_INET;
addr->v4 = ina;
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) {
sa2addr(r->ai_addr, addr, NULL);
freeaddrinfo(r);
return (1);
}
return (0);
}
int
parse_prefix(const char *word, size_t wordlen, struct bgpd_addr *addr,
uint8_t *prefixlen)
{
struct bgpd_addr tmp;
char *p, *ps;
const char *errstr;
int mask = -1;
if (word == NULL)
return (0);
memset(&tmp, 0, sizeof(tmp));
if ((p = strrchr(word, '/')) != NULL) {
size_t plen = strlen(p);
mask = strtonum(p + 1, 0, 128, &errstr);
if (errstr)
errx(1, "netmask %s", errstr);
if ((ps = malloc(wordlen - plen + 1)) == NULL)
err(1, "parse_prefix: malloc");
strlcpy(ps, word, wordlen - plen + 1);
if (parse_addr(ps, &tmp) == 0) {
free(ps);
return (0);
}
free(ps);
} else
if (parse_addr(word, &tmp) == 0)
return (0);
switch (tmp.aid) {
case AID_INET:
if (mask == -1)
mask = 32;
if (mask > 32)
errx(1, "invalid netmask: too large");
break;
case AID_INET6:
if (mask == -1)
mask = 128;
break;
default:
return (0);
}
applymask(addr, &tmp, mask);
*prefixlen = mask;
return (1);
}
int
parse_asnum(const char *word, size_t wordlen, uint32_t *asnum)
{
const char *errstr;
char *dot, *parseword;
uint32_t uval, uvalh = 0;
if (word == NULL)
return (0);
if (wordlen < 1 || word[0] < '0' || word[0] > '9')
return (0);
parseword = strdup(word);
if ((dot = strchr(parseword, '.')) != NULL) {
*dot++ = '\0';
uvalh = strtonum(parseword, 0, USHRT_MAX, &errstr);
if (errstr)
errx(1, "AS number is %s: %s", errstr, word);
uval = strtonum(dot, 0, USHRT_MAX, &errstr);
if (errstr)
errx(1, "AS number is %s: %s", errstr, word);
} else {
uval = strtonum(parseword, 0, UINT_MAX, &errstr);
if (errstr)
errx(1, "AS number is %s: %s", errstr, word);
}
free(parseword);
*asnum = uval | (uvalh << 16);
return (1);
}
int
parse_number(const char *word, struct parse_result *r, enum token_type type)
{
struct filter_set *fs;
const char *errstr;
u_int uval;
if (word == NULL)
return (0);
uval = strtonum(word, 0, UINT_MAX, &errstr);
if (errstr)
errx(1, "number is %s: %s", errstr, word);
/* number was parseable */
switch (type) {
case RTABLE:
r->rtableid = uval;
return (1);
case PATHID:
r->pathid = uval;
r->flags |= F_CTL_HAS_PATHID;
return (1);
default:
break;
}
if ((fs = calloc(1, sizeof(struct filter_set))) == NULL)
err(1, NULL);
switch (type) {
case LOCALPREF:
fs->type = ACTION_SET_LOCALPREF;
fs->action.metric = uval;
break;
case MED:
fs->type = ACTION_SET_MED;
fs->action.metric = uval;
break;
case PREPNBR:
if (uval > 128) {
free(fs);
return (0);
}
fs->type = ACTION_SET_PREPEND_PEER;
fs->action.prepend = uval;
break;
case PREPSELF:
if (uval > 128) {
free(fs);
return (0);
}
fs->type = ACTION_SET_PREPEND_SELF;
fs->action.prepend = uval;
break;
case WEIGHT:
fs->type = ACTION_SET_WEIGHT;
fs->action.metric = uval;
break;
default:
errx(1, "king bula sez bad things happen");
}
TAILQ_INSERT_TAIL(&r->set, fs, entry);
return (1);
}
static void
getcommunity(char *s, int large, uint32_t *val, uint32_t *flag)
{
long long max = USHRT_MAX;
const char *errstr;
*flag = 0;
*val = 0;
if (strcmp(s, "*") == 0) {
*flag = COMMUNITY_ANY;
return;
} else if (strcmp(s, "neighbor-as") == 0) {
*flag = COMMUNITY_NEIGHBOR_AS;
return;
} else if (strcmp(s, "local-as") == 0) {
*flag = COMMUNITY_LOCAL_AS;
return;
}
if (large)
max = UINT_MAX;
*val = strtonum(s, 0, max, &errstr);
if (errstr)
errx(1, "Community %s is %s (max: %llu)", s, errstr, max);
}
static void
setcommunity(struct community *c, uint32_t as, uint32_t data,
uint32_t asflag, uint32_t dataflag)
{
c->flags = COMMUNITY_TYPE_BASIC;
c->flags |= asflag << 8;
c->flags |= dataflag << 16;
c->data1 = as;
c->data2 = data;
c->data3 = 0;
}
void
parsecommunity(struct community *c, char *s)
{
char *p;
uint32_t as, data, asflag, dataflag;
/* Well-known communities */
if (strcasecmp(s, "GRACEFUL_SHUTDOWN") == 0) {
setcommunity(c, COMMUNITY_WELLKNOWN,
COMMUNITY_GRACEFUL_SHUTDOWN, 0, 0);
return;
} else if (strcasecmp(s, "NO_EXPORT") == 0) {
setcommunity(c, COMMUNITY_WELLKNOWN,
COMMUNITY_NO_EXPORT, 0, 0);
return;
} else if (strcasecmp(s, "NO_ADVERTISE") == 0) {
setcommunity(c, COMMUNITY_WELLKNOWN,
COMMUNITY_NO_ADVERTISE, 0, 0);
return;
} else if (strcasecmp(s, "NO_EXPORT_SUBCONFED") == 0) {
setcommunity(c, COMMUNITY_WELLKNOWN,
COMMUNITY_NO_EXPSUBCONFED, 0, 0);
return;
} else if (strcasecmp(s, "NO_PEER") == 0) {
setcommunity(c, COMMUNITY_WELLKNOWN,
COMMUNITY_NO_PEER, 0, 0);
return;
} else if (strcasecmp(s, "BLACKHOLE") == 0) {
setcommunity(c, COMMUNITY_WELLKNOWN,
COMMUNITY_BLACKHOLE, 0, 0);
return;
}
if ((p = strchr(s, ':')) == NULL)
errx(1, "Bad community syntax");
*p++ = 0;
getcommunity(s, 0, &as, &asflag);
getcommunity(p, 0, &data, &dataflag);
setcommunity(c, as, data, asflag, dataflag);
}
void
parselargecommunity(struct community *c, char *s)
{
char *p, *q;
uint32_t dflag1, dflag2, dflag3;
if ((p = strchr(s, ':')) == NULL)
errx(1, "Bad community syntax");
*p++ = 0;
if ((q = strchr(p, ':')) == NULL)
errx(1, "Bad community syntax");
*q++ = 0;
getcommunity(s, 1, &c->data1, &dflag1);
getcommunity(p, 1, &c->data2, &dflag2);
getcommunity(q, 1, &c->data3, &dflag3);
c->flags = COMMUNITY_TYPE_LARGE;
c->flags |= dflag1 << 8;
c->flags |= dflag2 << 16;
c->flags |= dflag3 << 24;
}
static int
parsesubtype(const char *name, int *type, int *subtype)
{
const struct ext_comm_pairs *cp;
int found = 0;
for (cp = iana_ext_comms; cp->subname != NULL; cp++) {
if (strcmp(name, cp->subname) == 0) {
if (found == 0) {
*type = cp->type;
*subtype = cp->subtype;
}
found++;
}
}
if (found > 1)
*type = -1;
return (found);
}
static int
parseextvalue(int type, char *s, uint32_t *v, uint32_t *flag)
{
const char *errstr;
char *p;
struct in_addr ip;
uint32_t uvalh, uval;
if (type != -1) {
/* nothing */
} else if (strcmp(s, "neighbor-as") == 0) {
*flag = COMMUNITY_NEIGHBOR_AS;
*v = 0;
return EXT_COMMUNITY_TRANS_TWO_AS;
} else if (strcmp(s, "local-as") == 0) {
*flag = COMMUNITY_LOCAL_AS;
*v = 0;
return EXT_COMMUNITY_TRANS_TWO_AS;
} else if ((p = strchr(s, '.')) == NULL) {
/* AS_PLAIN number (4 or 2 byte) */
strtonum(s, 0, USHRT_MAX, &errstr);
if (errstr == NULL)
type = EXT_COMMUNITY_TRANS_TWO_AS;
else
type = EXT_COMMUNITY_TRANS_FOUR_AS;
} else if (strchr(p + 1, '.') == NULL) {
/* AS_DOT number (4-byte) */
type = EXT_COMMUNITY_TRANS_FOUR_AS;
} else {
/* more than one dot -> IP address */
type = EXT_COMMUNITY_TRANS_IPV4;
}
switch (type & EXT_COMMUNITY_VALUE) {
case EXT_COMMUNITY_TRANS_TWO_AS:
uval = strtonum(s, 0, USHRT_MAX, &errstr);
if (errstr)
errx(1, "Bad ext-community %s is %s", s, errstr);
*v = uval;
break;
case EXT_COMMUNITY_TRANS_FOUR_AS:
if ((p = strchr(s, '.')) == NULL) {
uval = strtonum(s, 0, UINT_MAX, &errstr);
if (errstr)
errx(1, "Bad ext-community %s is %s", s,
errstr);
*v = uval;
break;
}
*p++ = '\0';
uvalh = strtonum(s, 0, USHRT_MAX, &errstr);
if (errstr)
errx(1, "Bad ext-community %s is %s", s, errstr);
uval = strtonum(p, 0, USHRT_MAX, &errstr);
if (errstr)
errx(1, "Bad ext-community %s is %s", p, errstr);
*v = uval | (uvalh << 16);
break;
case EXT_COMMUNITY_TRANS_IPV4:
if (inet_aton(s, &ip) == 0)
errx(1, "Bad ext-community %s not parseable", s);
*v = ntohl(ip.s_addr);
break;
default:
errx(1, "%s: unexpected type %d", __func__, type);
}
return (type);
}
void
parseextcommunity(struct community *c, const char *t, char *s)
{
const struct ext_comm_pairs *cp;
char *p, *ep;
uint64_t ullval;
uint32_t uval, uval2, dflag1 = 0, dflag2 = 0;
int type = 0, subtype = 0;
if (strcmp(t, "*") == 0 && strcmp(s, "*") == 0) {
c->flags = COMMUNITY_TYPE_EXT;
c->flags |= COMMUNITY_ANY << 24;
return;
}
if (parsesubtype(t, &type, &subtype) == 0)
errx(1, "Bad ext-community unknown type");
switch (type) {
case EXT_COMMUNITY_TRANS_TWO_AS:
case EXT_COMMUNITY_TRANS_FOUR_AS:
case EXT_COMMUNITY_TRANS_IPV4:
case EXT_COMMUNITY_GEN_TWO_AS:
case EXT_COMMUNITY_GEN_FOUR_AS:
case EXT_COMMUNITY_GEN_IPV4:
case -1:
if (strcmp(s, "*") == 0) {
dflag1 = COMMUNITY_ANY;
break;
}
if ((p = strchr(s, ':')) == NULL)
errx(1, "Bad ext-community %s", s);
*p++ = '\0';
type = parseextvalue(type, s, &uval, &dflag1);
switch (type) {
case EXT_COMMUNITY_TRANS_TWO_AS:
case EXT_COMMUNITY_GEN_TWO_AS:
getcommunity(p, 1, &uval2, &dflag2);
break;
case EXT_COMMUNITY_TRANS_IPV4:
case EXT_COMMUNITY_TRANS_FOUR_AS:
case EXT_COMMUNITY_GEN_IPV4:
case EXT_COMMUNITY_GEN_FOUR_AS:
getcommunity(p, 0, &uval2, &dflag2);
break;
default:
errx(1, "parseextcommunity: unexpected result");
}
c->data1 = uval;
c->data2 = uval2;
break;
case EXT_COMMUNITY_TRANS_OPAQUE:
case EXT_COMMUNITY_TRANS_EVPN:
if (strcmp(s, "*") == 0) {
dflag1 = COMMUNITY_ANY;
break;
}
errno = 0;
ullval = strtoull(s, &ep, 0);
if (s[0] == '\0' || *ep != '\0')
errx(1, "Bad ext-community bad value");
if (errno == ERANGE && ullval > EXT_COMMUNITY_OPAQUE_MAX)
errx(1, "Bad ext-community value too big");
c->data1 = ullval >> 32;
c->data2 = ullval;
break;
case EXT_COMMUNITY_NON_TRANS_OPAQUE:
if (subtype == EXT_COMMUNITY_SUBTYPE_OVS) {
if (strcmp(s, "valid") == 0) {
c->data2 = EXT_COMMUNITY_OVS_VALID;
break;
} else if (strcmp(s, "invalid") == 0) {
c->data2 = EXT_COMMUNITY_OVS_INVALID;
break;
} else if (strcmp(s, "not-found") == 0) {
c->data2 = EXT_COMMUNITY_OVS_NOTFOUND;
break;
} else if (strcmp(s, "*") == 0) {
dflag1 = COMMUNITY_ANY;
break;
}
}
errx(1, "Bad ext-community %s", s);
}
c->data3 = type << 8 | subtype;
/* special handling of ext-community rt * since type is not known */
if (dflag1 == COMMUNITY_ANY && type == -1) {
c->flags = COMMUNITY_TYPE_EXT;
c->flags |= dflag1 << 8;
return;
}
/* verify type/subtype combo */
for (cp = iana_ext_comms; cp->subname != NULL; cp++) {
if (cp->type == type && cp->subtype == subtype) {
c->flags = COMMUNITY_TYPE_EXT;
c->flags |= dflag1 << 8;
c->flags |= dflag2 << 16;
return;
}
}
errx(1, "Bad ext-community bad format for type");
}
int
parse_nexthop(const char *word, struct parse_result *r)
{
struct filter_set *fs;
if ((fs = calloc(1, sizeof(struct filter_set))) == NULL)
err(1, NULL);
if (strcmp(word, "blackhole") == 0)
fs->type = ACTION_SET_NEXTHOP_BLACKHOLE;
else if (strcmp(word, "reject") == 0)
fs->type = ACTION_SET_NEXTHOP_REJECT;
else if (strcmp(word, "no-modify") == 0)
fs->type = ACTION_SET_NEXTHOP_NOMODIFY;
else if (parse_addr(word, &fs->action.nexthop)) {
fs->type = ACTION_SET_NEXTHOP;
} else {
free(fs);
return (0);
}
TAILQ_INSERT_TAIL(&r->set, fs, entry);
return (1);
}
static int
unary_op(const char *op)
{
if (strcmp(op, "=") == 0)
return FLOWSPEC_OP_NUM_EQ;
if (strcmp(op, "!=") == 0)
return FLOWSPEC_OP_NUM_NOT;
if (strcmp(op, ">") == 0)
return FLOWSPEC_OP_NUM_GT;
if (strcmp(op, ">=") == 0)
return FLOWSPEC_OP_NUM_GE;
if (strcmp(op, "<") == 0)
return FLOWSPEC_OP_NUM_LT;
if (strcmp(op, "<=") == 0)
return FLOWSPEC_OP_NUM_LE;
return -1;
}
static enum comp_ops
binary_op(const char *op)
{
if (strcmp(op, "-") == 0)
return OP_RANGE;
if (strcmp(op, "><") == 0)
return OP_XRANGE;
return OP_NONE;
}
static void
push_numop(struct parse_result *r, int type, uint8_t op, int and, long long val)
{
uint8_t *comp;
void *data;
uint32_t u32;
uint16_t u16;
uint8_t u8, flag = 0;
int len, complen;
flag |= op;
if (and)
flag |= FLOWSPEC_OP_AND;
if (val < 0 || val > 0xffffffff) {
errx(1, "unsupported value for flowspec num_op");
} else if (val <= 255) {
len = 1;
u8 = val;
data = &u8;
} else if (val <= 0xffff) {
len = 2;
u16 = htons(val);
data = &u16;
flag |= 1 << FLOWSPEC_OP_LEN_SHIFT;
} else {
len = 4;
u32 = htonl(val);
data = &u32;
flag |= 2 << FLOWSPEC_OP_LEN_SHIFT;
}
complen = r->flow.complen[type];
comp = realloc(r->flow.components[type], complen + len + 1);
if (comp == NULL)
err(1, NULL);
comp[complen++] = flag;
memcpy(comp + complen, data, len);
complen += len;
r->flow.complen[type] = complen;
r->flow.components[type] = comp;
}
int
parse_flow_numop(int argc, char *argv[], struct parse_result *r,
enum token_type toktype)
{
const char *errstr;
long long val, val2;
int numargs, type;
int is_list = 0;
int op;
switch (toktype) {
case FLOW_PROTO:
type = FLOWSPEC_TYPE_PROTO;
break;
case FLOW_SRCPORT:
type = FLOWSPEC_TYPE_SRC_PORT;
break;
case FLOW_DSTPORT:
type = FLOWSPEC_TYPE_DST_PORT;
break;
case FLOW_ICMPTYPE:
type = FLOWSPEC_TYPE_ICMP_TYPE;
break;
case FLOW_ICMPCODE:
type = FLOWSPEC_TYPE_ICMP_CODE;
break;
case FLOW_LENGTH:
type = FLOWSPEC_TYPE_PKT_LEN;
break;
case FLOW_DSCP:
type = FLOWSPEC_TYPE_DSCP;
break;
default:
errx(1, "parse_flow_numop called with unsupported type");
}
/* skip keyword (which is already accounted for) */
argc--;
argv++;
numargs = argc;
while (argc > 0) {
if (strcmp(argv[0], "{") == 0) {
is_list = 1;
argc--;
argv++;
} else if (is_list && strcmp(argv[0], "}") == 0) {
is_list = 0;
argc--;
argv++;
} else if ((op = unary_op(argv[0])) != -1) {
if (argc < 2)
errx(1, "missing argument in flowspec "
"definition");
val = strtonum(argv[1], LLONG_MIN, LLONG_MAX, &errstr);
if (errstr)
errx(1, "\"%s\" invalid number: %s", argv[0],
errstr);
push_numop(r, type, op, 0, val);
argc -= 2;
argv += 2;
} else {
val = strtonum(argv[0], LLONG_MIN, LLONG_MAX, &errstr);
if (errstr)
errx(1, "\"%s\" invalid number: %s", argv[0],
errstr);
if (argc >= 3 && (op = binary_op(argv[1])) != OP_NONE) {
val2 = strtonum(argv[2], LLONG_MIN, LLONG_MAX,
&errstr);
if (errstr)
errx(1, "\"%s\" invalid number: %s",
argv[2], errstr);
switch (op) {
case OP_RANGE:
push_numop(r, type, FLOWSPEC_OP_NUM_GE,
0, val);
push_numop(r, type, FLOWSPEC_OP_NUM_LE,
1, val2);
break;
case OP_XRANGE:
push_numop(r, type, FLOWSPEC_OP_NUM_LT,
0, val);
push_numop(r, type, FLOWSPEC_OP_NUM_GT,
0, val2);
break;
}
argc -= 3;
argv += 3;
} else {
push_numop(r, type, FLOWSPEC_OP_NUM_EQ, 0, val);
argc--;
argv++;
}
}
if (is_list == 0)
break;
}
return numargs - argc;
}
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