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|
/* $OpenBSD: parse.y,v 1.20 2007/01/30 10:12:06 pyr Exp $ */
/*
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
* Copyright (c) 2001 Theo de Raadt. All rights reserved.
*
* 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 <sys/queue.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <openssl/ssl.h>
#include "hoststated.h"
struct hoststated *conf = NULL;
static FILE *fin = NULL;
static int lineno = 1;
static int errors = 0;
const char *infile;
char *start_state;
objid_t last_service_id = 0;
objid_t last_table_id = 0;
objid_t last_host_id = 0;
static struct service *service = NULL;
static struct table *table = NULL;
int yyerror(const char *, ...);
int yyparse(void);
int kw_cmp(const void *, const void *);
int lookup(char *);
int lgetc(FILE *, int *);
int lungetc(int);
int findeol(void);
int yylex(void);
TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
struct sym {
TAILQ_ENTRY(sym) entries;
int used;
int persist;
char *nam;
char *val;
};
int symset(const char *, const char *, int);
char *symget(const char *);
int cmdline_symset(char *);
struct address *host_v4(const char *);
struct address *host_v6(const char *);
int host_dns(const char *, struct addresslist *,
int, in_port_t, const char *);
int host(const char *, struct addresslist *,
int, in_port_t, const char *);
typedef struct {
union {
u_int32_t number;
char *string;
struct host *host;
struct timeval tv;
} v;
int lineno;
} YYSTYPE;
%}
%token SERVICE TABLE BACKUP HOST REAL
%token CHECK HTTP HTTPS TCP ICMP EXTERNAL
%token TIMEOUT CODE DIGEST PORT TAG INTERFACE
%token VIRTUAL IP INTERVAL DISABLE STICKYADDR
%token SEND EXPECT NOTHING USE SSL
%token ERROR
%token <v.string> STRING
%type <v.string> interface
%type <v.number> number port http_type
%type <v.host> host
%type <v.tv> timeout
%%
grammar : /* empty */
| grammar '\n'
| grammar varset '\n'
| grammar main '\n'
| grammar service '\n'
| grammar table '\n'
| grammar error '\n' { errors++; }
;
number : STRING {
const char *estr;
$$ = strtonum($1, 0, UINT_MAX, &estr);
if (estr) {
yyerror("cannot parse number %s : %s",
$1, estr);
free($1);
YYERROR;
}
free($1);
}
;
http_type : HTTP { $$ = 0; }
| HTTPS { $$ = 1; }
;
port : PORT STRING {
const char *estr;
struct servent *servent;
$$ = strtonum($2, 1, USHRT_MAX, &estr);
if (estr) {
if (errno == ERANGE) {
yyerror("port %s is out of range", $2);
free($2);
YYERROR;
}
servent = getservbyname($2, "tcp");
if (servent == NULL) {
yyerror("port %s is invalid", $2);
free($2);
YYERROR;
}
$$ = servent->s_port;
} else
$$ = htons($$);
free($2);
}
| PORT http_type {
struct servent *servent;
int port;
const char *sport;
if ($2) {
port = 443;
sport = "https";
} else {
port = 80;
sport = "http";
}
servent = getservbyname(sport, "tcp");
if (servent == NULL)
$$ = htons(port);
else
$$ = servent->s_port;
}
;
varset : STRING '=' STRING {
if (symset($1, $3, 0) == -1)
fatal("cannot store variable");
free($1);
free($3);
}
;
sendbuf : NOTHING {
table->sendbuf = NULL;
}
| STRING {
table->sendbuf = strdup($1);
if (table->sendbuf == NULL)
fatal("out of memory");
free($1);
}
;
main : INTERVAL number { conf->interval.tv_sec = $2; }
| TIMEOUT timeout {
bcopy(&$2, &conf->timeout, sizeof(struct timeval));
}
;
service : SERVICE STRING {
struct service *srv;
TAILQ_FOREACH(srv, &conf->services, entry)
if (!strcmp(srv->name, $2))
break;
if (srv != NULL) {
yyerror("service %s defined twice", $2);
free($2);
YYERROR;
}
if ((srv = calloc(1, sizeof (*srv))) == NULL)
fatal("out of memory");
if (strlcpy(srv->name, $2, sizeof(srv->name)) >=
sizeof(srv->name)) {
yyerror("service name truncated");
YYERROR;
}
free($2);
srv->id = last_service_id++;
if (last_service_id == UINT_MAX) {
yyerror("too many services defined");
YYERROR;
}
service = srv;
} '{' optnl serviceopts_l '}' {
if (service->table == NULL) {
yyerror("service %s has no table",
service->name);
YYERROR;
}
if (TAILQ_EMPTY(&service->virts)) {
yyerror("service %s has no virtual ip",
service->name);
YYERROR;
}
conf->servicecount++;
if (service->backup == NULL)
service->backup = &conf->empty_table;
else if (service->backup->port !=
service->table->port) {
yyerror("service %s uses two different ports "
"for its table and backup table",
service->name);
YYERROR;
}
if (!(service->flags & F_DISABLE))
service->flags |= F_ADD;
TAILQ_INSERT_HEAD(&conf->services, service, entry);
}
;
serviceopts_l : serviceopts_l serviceoptsl nl
| serviceoptsl optnl
;
serviceoptsl : TABLE STRING {
struct table *tb;
TAILQ_FOREACH(tb, &conf->tables, entry)
if (!strcmp(tb->name, $2))
break;
if (tb == NULL) {
yyerror("no such table: %s", $2);
free($2);
YYERROR;
} else {
service->table = tb;
service->table->serviceid = service->id;
service->table->flags |= F_USED;
free($2);
}
}
| BACKUP TABLE STRING {
struct table *tb;
if (service->backup) {
yyerror("backup already specified");
free($3);
YYERROR;
}
TAILQ_FOREACH(tb, &conf->tables, entry)
if (!strcmp(tb->name, $3))
break;
if (tb == NULL) {
yyerror("no such table: %s", $3);
free($3);
YYERROR;
} else {
service->backup = tb;
service->backup->serviceid = service->id;
service->backup->flags |= (F_USED|F_BACKUP);
free($3);
}
}
| VIRTUAL IP STRING port interface {
if (host($3, &service->virts,
SRV_MAX_VIRTS, $4, $5) <= 0) {
yyerror("invalid virtual ip: %s", $3);
free($3);
free($5);
YYERROR;
}
free($3);
free($5);
}
| DISABLE { service->flags |= F_DISABLE; }
| STICKYADDR { service->flags |= F_STICKY; }
| TAG STRING {
if (strlcpy(service->tag, $2, sizeof(service->tag)) >=
sizeof(service->tag)) {
yyerror("service tag name truncated");
free($2);
YYERROR;
}
free($2);
}
;
table : TABLE STRING {
struct table *tb;
TAILQ_FOREACH(tb, &conf->tables, entry)
if (!strcmp(tb->name, $2))
break;
if (tb != NULL) {
yyerror("table %s defined twice");
free($2);
YYERROR;
}
if ((tb = calloc(1, sizeof (*tb))) == NULL)
fatal("out of memory");
if (strlcpy(tb->name, $2, sizeof(tb->name)) >=
sizeof(tb->name)) {
yyerror("table name truncated");
YYERROR;
}
tb->id = last_table_id++;
bcopy(&conf->timeout, &tb->timeout,
sizeof(struct timeval));
if (last_table_id == UINT_MAX) {
yyerror("too many tables defined");
YYERROR;
}
free($2);
table = tb;
} '{' optnl tableopts_l '}' {
if (table->port == 0) {
yyerror("table %s has no port", table->name);
YYERROR;
}
if (TAILQ_EMPTY(&table->hosts)) {
yyerror("table %s has no hosts", table->name);
YYERROR;
}
if (table->check == CHECK_NOCHECK) {
yyerror("table %s has no check", table->name);
YYERROR;
}
conf->tablecount++;
TAILQ_INSERT_HEAD(&conf->tables, table, entry);
}
;
tableopts_l : tableopts_l tableoptsl nl
| tableoptsl optnl
;
tableoptsl : host {
$1->tableid = table->id;
$1->tablename = table->name;
TAILQ_INSERT_HEAD(&table->hosts, $1, entry);
}
| TIMEOUT timeout {
bcopy(&$2, &table->timeout, sizeof(struct timeval));
}
| CHECK ICMP {
table->check = CHECK_ICMP;
}
| CHECK TCP {
table->check = CHECK_TCP;
}
| CHECK SSL {
table->check = CHECK_TCP;
conf->flags |= F_SSL;
table->flags |= F_SSL;
}
| CHECK http_type STRING CODE number {
if ($2) {
conf->flags |= F_SSL;
table->flags |= F_SSL;
}
table->check = CHECK_HTTP_CODE;
table->retcode = $5;
asprintf(&table->sendbuf, "HEAD %s HTTP/1.0\r\n\r\n",
$3);
free($3);
if (table->sendbuf == NULL)
fatal("out of memory");
}
| CHECK http_type STRING DIGEST STRING {
if ($2) {
conf->flags |= F_SSL;
table->flags |= F_SSL;
}
table->check = CHECK_HTTP_DIGEST;
asprintf(&table->sendbuf, "GET %s HTTP/1.0\r\n\r\n",
$3);
free($3);
if (table->sendbuf == NULL)
fatal("out of memory");
if (strlcpy(table->digest, $5,
sizeof(table->digest)) >= sizeof(table->digest)) {
yyerror("http digest truncated");
free($5);
YYERROR;
}
free($5);
}
| CHECK SEND sendbuf EXPECT STRING {
table->check = CHECK_SEND_EXPECT;
if (strlcpy(table->exbuf, $5, sizeof(table->exbuf))
>= sizeof(table->exbuf)) {
yyerror("yyparse: expect buffer truncated");
free($5);
YYERROR;
}
free($5);
}
| REAL port {
table->port = $2;
}
| DISABLE { table->flags |= F_DISABLE; }
| USE SSL {
table->flags |= F_SSL;
conf->flags |= F_SSL;
}
;
interface : /*empty*/ { $$ = NULL; }
| INTERFACE STRING { $$ = $2; }
;
host : HOST STRING {
struct address *a;
struct addresslist al;
if (($$ = calloc(1, sizeof(*($$)))) == NULL)
fatal("out of memory");
TAILQ_INIT(&al);
if (host($2, &al, 1, 0, NULL) <= 0) {
yyerror("invalid host %s", $2);
free($2);
free($$);
YYERROR;
}
a = TAILQ_FIRST(&al);
memcpy(&$$->ss, &a->ss, sizeof($$->ss));
free(a);
if (strlcpy($$->name, $2, sizeof($$->name)) >=
sizeof($$->name)) {
yyerror("host name truncated");
free($2);
free($$);
YYERROR;
}
free($2);
$$->id = last_host_id++;
if (last_host_id == UINT_MAX) {
yyerror("too many hosts defined");
free($$);
YYERROR;
}
}
;
timeout : number
{
$$.tv_sec = $1 / 1000;
$$.tv_usec = ($1 % 1000) * 1000;
}
;
optnl : '\n' optnl
|
;
nl : '\n' optnl
;
%%
struct keywords {
const char *k_name;
int k_val;
};
int
yyerror(const char *fmt, ...)
{
va_list ap;
errors = 1;
va_start(ap, fmt);
fprintf(stderr, "%s:%d: ", infile, yylval.lineno);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
return (0);
}
int
kw_cmp(const void *k, const void *e)
{
return (strcmp(k, ((const struct keywords *)e)->k_name));
}
int
lookup(char *s)
{
/* this has to be sorted always */
static const struct keywords keywords[] = {
{ "backup", BACKUP },
{ "check", CHECK },
{ "code", CODE },
{ "digest", DIGEST },
{ "disable", DISABLE },
{ "expect", EXPECT },
{ "external", EXTERNAL },
{ "host", HOST },
{ "http", HTTP },
{ "https", HTTPS },
{ "icmp", ICMP },
{ "interface", INTERFACE },
{ "interval", INTERVAL },
{ "ip", IP },
{ "nothing", NOTHING },
{ "port", PORT },
{ "real", REAL },
{ "send", SEND },
{ "service", SERVICE },
{ "ssl", SSL },
{ "sticky-address", STICKYADDR },
{ "table", TABLE },
{ "tag", TAG },
{ "tcp", TCP },
{ "timeout", TIMEOUT },
{ "use", USE },
{ "virtual", VIRTUAL }
};
const struct keywords *p;
p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
sizeof(keywords[0]), kw_cmp);
if (p)
return (p->k_val);
else
return (STRING);
}
#define MAXPUSHBACK 128
char *parsebuf;
int parseindex;
char pushback_buffer[MAXPUSHBACK];
int pushback_index = 0;
int
lgetc(FILE *f, int *keep)
{
int c, next;
*keep = 0;
if (parsebuf) {
/* Read character from the parsebuffer instead of input. */
if (parseindex >= 0) {
c = parsebuf[parseindex++];
if (c != '\0')
return (c);
parsebuf = NULL;
} else
parseindex++;
}
if (pushback_index)
return (pushback_buffer[--pushback_index]);
while ((c = getc(f)) == '\\') {
next = getc(f);
if (next == 'n') {
*keep = 1;
c = '\n';
break;
} else if (next == 'r') {
*keep = 1;
c = '\r';
break;
} else if (next != '\n') {
c = next;
break;
}
yylval.lineno = lineno;
lineno++;
}
if (c == '\t' || c == ' ') {
/* Compress blanks to a single space. */
do {
c = getc(f);
} while (c == '\t' || c == ' ');
ungetc(c, f);
c = ' ';
}
return (c);
}
int
lungetc(int c)
{
if (c == EOF)
return (EOF);
if (parsebuf) {
parseindex--;
if (parseindex >= 0)
return (c);
}
if (pushback_index < MAXPUSHBACK-1)
return (pushback_buffer[pushback_index++] = c);
else
return (EOF);
}
int
findeol(void)
{
int c;
int k;
parsebuf = NULL;
pushback_index = 0;
/* skip to either EOF or the first real EOL */
while (1) {
c = lgetc(fin, &k);
if (c == '\n' && k == 0) {
lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
int
yylex(void)
{
char buf[8096];
char *p, *val;
int endc, c;
int token;
int keep;
top:
p = buf;
while ((c = lgetc(fin, &keep)) == ' ')
; /* nothing */
yylval.lineno = lineno;
if (c == '#')
do {
while ((c = lgetc(fin, &keep)) != '\n' && c != EOF)
; /* nothing */
} while (keep == 1);
if (c == '$' && parsebuf == NULL) {
while (1) {
if ((c = lgetc(fin, &keep)) == EOF)
return (0);
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
if (isalnum(c) || c == '_') {
*p++ = (char)c;
continue;
}
*p = '\0';
lungetc(c);
break;
}
val = symget(buf);
if (val == NULL) {
yyerror("macro '%s' not defined", buf);
return (findeol());
}
parsebuf = val;
parseindex = 0;
goto top;
}
switch (c) {
case '\'':
case '"':
endc = c;
while (1) {
if ((c = lgetc(fin, &keep)) == EOF)
return (0);
if (c == endc) {
*p = '\0';
break;
}
if (c == '\n' && keep == 0) {
lineno++;
continue;
}
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
*p++ = (char)c;
}
yylval.v.string = strdup(buf);
if (yylval.v.string == NULL)
errx(1, "yylex: strdup");
return (STRING);
}
#define allowed_in_string(x) \
(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
x != '{' && x != '}' && \
x != '!' && x != '=' && x != '#' && \
x != ','))
if (isalnum(c) || c == ':' || c == '_') {
do {
*p++ = c;
if ((unsigned)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(fin, &keep)) != EOF &&
(allowed_in_string(c)));
lungetc(c);
*p = '\0';
if ((token = lookup(buf)) == STRING)
if ((yylval.v.string = strdup(buf)) == NULL)
err(1, "yylex: strdup");
return (token);
}
if (c == '\n') {
yylval.lineno = lineno;
lineno++;
}
if (c == EOF)
return (0);
return (c);
}
int
parse_config(struct hoststated *x_conf, const char *filename, int opts)
{
struct sym *sym, *next;
conf = x_conf;
TAILQ_INIT(&conf->services);
TAILQ_INIT(&conf->tables);
memset(&conf->empty_table, 0, sizeof(conf->empty_table));
conf->empty_table.id = EMPTY_TABLE;
conf->empty_table.flags |= F_DISABLE;
(void)strlcpy(conf->empty_table.name, "empty",
sizeof(conf->empty_table.name));
conf->timeout.tv_sec = CHECK_TIMEOUT / 1000;
conf->timeout.tv_usec = (CHECK_TIMEOUT % 1000) * 1000;
conf->interval.tv_sec = CHECK_INTERVAL;
conf->interval.tv_usec = 0;
conf->opts = opts;
if ((fin = fopen(filename, "r")) == NULL) {
warn("%s", filename);
return (0);
}
infile = filename;
setservent(1);
yyparse();
endservent();
fclose(fin);
/* Free macros and check which have not been used. */
for (sym = TAILQ_FIRST(&symhead); sym != NULL; sym = next) {
next = TAILQ_NEXT(sym, entries);
if ((conf->opts & HOSTSTATED_OPT_VERBOSE) && !sym->used)
fprintf(stderr, "warning: macro '%s' not "
"used\n", sym->nam);
if (!sym->persist) {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entries);
free(sym);
}
}
if (TAILQ_EMPTY(&conf->services)) {
log_warnx("no services, nothing to do");
errors++;
}
if (timercmp(&conf->timeout, &conf->interval, >=)) {
log_warnx("global timeout exceeds interval");
errors++;
}
/* Verify that every table is used */
TAILQ_FOREACH(table, &conf->tables, entry) {
if (!(table->flags & F_USED)) {
log_warnx("unused table: %s", table->name);
errors++;
}
if (timercmp(&table->timeout, &conf->interval, >=)) {
log_warnx("table timeout exceeds interval: %s",
table->name);
errors++;
}
}
if (errors) {
bzero(&conf, sizeof (*conf));
return (-1);
}
return (0);
}
int
symset(const char *nam, const char *val, int persist)
{
struct sym *sym;
for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
sym = TAILQ_NEXT(sym, entries))
; /* nothing */
if (sym != NULL) {
if (sym->persist == 1)
return (0);
else {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entries);
free(sym);
}
}
if ((sym = calloc(1, sizeof(*sym))) == NULL)
return (-1);
sym->nam = strdup(nam);
if (sym->nam == NULL) {
free(sym);
return (-1);
}
sym->val = strdup(val);
if (sym->val == NULL) {
free(sym->nam);
free(sym);
return (-1);
}
sym->used = 0;
sym->persist = persist;
TAILQ_INSERT_TAIL(&symhead, sym, entries);
return (0);
}
int
cmdline_symset(char *s)
{
char *sym, *val;
int ret;
size_t len;
if ((val = strrchr(s, '=')) == NULL)
return (-1);
len = strlen(s) - strlen(val) + 1;
if ((sym = malloc(len)) == NULL)
errx(1, "cmdline_symset: malloc");
strlcpy(sym, s, len);
ret = symset(sym, val + 1, 1);
free(sym);
return (ret);
}
char *
symget(const char *nam)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entries)
if (strcmp(nam, sym->nam) == 0) {
sym->used = 1;
return (sym->val);
}
return (NULL);
}
struct address *
host_v4(const char *s)
{
struct in_addr ina;
struct sockaddr_in *sain;
struct address *h;
bzero(&ina, sizeof(ina));
if (inet_pton(AF_INET, s, &ina) != 1)
return (NULL);
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(NULL);
sain = (struct sockaddr_in *)&h->ss;
sain->sin_len = sizeof(struct sockaddr_in);
sain->sin_family = AF_INET;
sain->sin_addr.s_addr = ina.s_addr;
return (h);
}
struct address *
host_v6(const char *s)
{
struct in6_addr ina6;
struct sockaddr_in6 *sin6;
struct address *h;
bzero(&ina6, sizeof(ina6));
if (inet_pton(AF_INET6, s, &ina6) != 1)
return (NULL);
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(NULL);
sin6 = (struct sockaddr_in6 *)&h->ss;
sin6->sin6_len = sizeof(struct sockaddr_in6);
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr, &ina6, sizeof(ina6));
return (h);
}
int
host_dns(const char *s, struct addresslist *al, int max,
in_port_t port, const char *ifname)
{
struct addrinfo hints, *res0, *res;
int error, cnt = 0;
struct sockaddr_in *sain;
struct sockaddr_in6 *sin6;
struct address *h;
bzero(&hints, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM; /* DUMMY */
error = getaddrinfo(s, NULL, &hints, &res0);
if (error == EAI_AGAIN || error == EAI_NODATA || error == EAI_NONAME)
return (0);
if (error) {
log_warnx("host_dns: could not parse \"%s\": %s", s,
gai_strerror(error));
return (-1);
}
for (res = res0; res && cnt < max; res = res->ai_next) {
if (res->ai_family != AF_INET &&
res->ai_family != AF_INET6)
continue;
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(NULL);
h->port = port;
if (ifname != NULL) {
if (strlcpy(h->ifname, ifname, sizeof(h->ifname)) >=
sizeof(h->ifname))
log_warnx("host_dns: interface name truncated");
return (-1);
}
h->ss.ss_family = res->ai_family;
if (res->ai_family == AF_INET) {
sain = (struct sockaddr_in *)&h->ss;
sain->sin_len = sizeof(struct sockaddr_in);
sain->sin_addr.s_addr = ((struct sockaddr_in *)
res->ai_addr)->sin_addr.s_addr;
} else {
sin6 = (struct sockaddr_in6 *)&h->ss;
sin6->sin6_len = sizeof(struct sockaddr_in6);
memcpy(&sin6->sin6_addr, &((struct sockaddr_in6 *)
res->ai_addr)->sin6_addr, sizeof(struct in6_addr));
}
TAILQ_INSERT_HEAD(al, h, entry);
cnt++;
}
if (cnt == max && res) {
log_warnx("host_dns: %s resolves to more than %d hosts",
s, max);
}
freeaddrinfo(res0);
return (cnt);
}
int
host(const char *s, struct addresslist *al, int max,
in_port_t port, const char *ifname)
{
struct address *h;
h = host_v4(s);
/* IPv6 address? */
if (h == NULL)
h = host_v6(s);
if (h != NULL) {
h->port = port;
if (ifname != NULL) {
if (strlcpy(h->ifname, ifname, sizeof(h->ifname)) >=
sizeof(h->ifname)) {
log_warnx("host: interface name truncated");
return (-1);
}
}
TAILQ_INSERT_HEAD(al, h, entry);
return (1);
}
return (host_dns(s, al, max, port, ifname));
}
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