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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "resolv.h"
#include "dnsres.h"
void
dnsres_setservent(struct dnsres_servent_state *state, int f)
{
if (state->servf == NULL)
state->servf = fopen(DNSRES_PATH_SERVICES, "r" );
else
rewind(state->servf);
state->stayopen |= f;
}
void
dnsres_endservent(struct dnsres_servent_state *state)
{
if (state->servf) {
fclose(state->servf);
state->servf = NULL;
}
state->stayopen = 0;
}
struct dnsres_servent *
dnsres_getservent(struct dnsres_servent_state *state)
{
char *p, *cp, **q, *endp;
long l;
size_t len;
if (state->servf == NULL &&
(state->servf = fopen(DNSRES_PATH_SERVICES, "r" )) == NULL)
return (NULL);
again:
if ((p = fgetln(state->servf, &len)) == NULL)
return (NULL);
if (p[len-1] == '\n')
len--;
if (len >= sizeof(state->line) || len == 0)
goto again;
p = memcpy(state->line, p, len);
state->line[len] = '\0';
if (*p == '#')
goto again;
if ((cp = strchr(p, '#')) != NULL)
*cp = '\0';
state->serv.s_name = p;
p = strpbrk(p, " \t");
if (p == NULL)
goto again;
*p++ = '\0';
while (*p == ' ' || *p == '\t')
p++;
cp = strpbrk(p, ",/");
if (cp == NULL)
goto again;
*cp++ = '\0';
l = strtol(p, &endp, 10);
if (endp == p || *endp != '\0' || l < 0 || l > USHRT_MAX)
goto again;
state->serv.s_port = htons((in_port_t)l);
state->serv.s_proto = cp;
q = state->serv.s_aliases = state->serv_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &state->serv_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&state->serv);
}
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