NetBSD/dist/bind/lib/irs/getprotoent_r.c

188 lines
4.5 KiB
C

/* $NetBSD: getprotoent_r.c,v 1.1.1.1 1999/11/20 18:54:09 veego Exp $ */
/*
* Copyright (c) 1998-1999 by Internet Software Consortium.
*
* 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "Id: getprotoent_r.c,v 8.4 1999/01/18 07:46:52 vixie Exp";
#endif /* LIBC_SCCS and not lint */
#include <port_before.h>
#if !defined(_REENTRANT) || !defined(DO_PTHREADS)
static int getprotoent_r_not_required = 0;
#else
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netdb.h>
#include <port_after.h>
#ifdef PROTO_R_RETURN
static PROTO_R_RETURN
copy_protoent(struct protoent *, struct protoent *, PROTO_R_COPY_ARGS);
PROTO_R_RETURN
getprotobyname_r(const char *name, struct protoent *pptr, PROTO_R_ARGS) {
struct protoent *pe = getprotobyname(name);
if (pe == NULL)
return (PROTO_R_BAD);
return (copy_protoent(pe, pptr, PROTO_R_COPY));
}
PROTO_R_RETURN
getprotobynumber_r(int proto, struct protoent *pptr, PROTO_R_ARGS) {
struct protoent *pe = getprotobynumber(proto);
if (pe == NULL)
return (PROTO_R_BAD);
return (copy_protoent(pe, pptr, PROTO_R_COPY));
}
/*
* These assume a single context is in operation per thread.
* If this is not the case we will need to call irs directly
* rather than through the base functions.
*/
PROTO_R_RETURN
getprotoent_r(struct protoent *pptr, PROTO_R_ARGS) {
struct protoent *pe = getprotoent();
if (pe == NULL)
return (PROTO_R_BAD);
return (copy_protoent(pe, pptr, PROTO_R_COPY));
}
PROTO_R_SET_RETURN
#ifdef PROTO_R_ENT_ARGS
setprotoent_r(int stay_open, PROTO_R_ENT_ARGS)
#else
setprotoent_r(int stay_open)
#endif
{
setprotoent(stay_open);
#ifdef PROTO_R_SET_RESULT
return (PROTO_R_SET_RESULT);
#endif
}
PROTO_R_END_RETURN
#ifdef PROTO_R_ENT_ARGS
endprotoent_r(PROTO_R_ENT_ARGS)
#else
endprotoent_r()
#endif
{
endprotoent();
PROTO_R_END_RESULT(PROTO_R_OK);
}
/* Private */
#ifndef PROTOENT_DATA
static PROTO_R_RETURN
copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
char *cp;
int i, n;
int numptr, len;
/* Find out the amount of space required to store the answer. */
numptr = 1; /* NULL ptr */
len = (char *)ALIGN(buf) - buf;
for (i = 0; pe->p_aliases[i]; i++, numptr++) {
len += strlen(pe->p_aliases[i]) + 1;
}
len += strlen(pe->p_name) + 1;
len += numptr * sizeof(char*);
if (len > buflen) {
errno = ERANGE;
return (PROTO_R_BAD);
}
/* copy protocol value*/
pptr->p_proto = pe->p_proto;
cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
/* copy official name */
n = strlen(pe->p_name) + 1;
strcpy(cp, pe->p_name);
pptr->p_name = cp;
cp += n;
/* copy aliases */
pptr->p_aliases = (char **)ALIGN(buf);
for (i = 0 ; pe->p_aliases[i]; i++) {
n = strlen(pe->p_aliases[i]) + 1;
strcpy(cp, pe->p_aliases[i]);
pptr->p_aliases[i] = cp;
cp += n;
}
pptr->p_aliases[i] = NULL;
return (PROTO_R_OK);
}
#else /* !PROTOENT_DATA */
static int
copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
char *cp, *eob;
int i, n;
/* copy protocol value */
pptr->p_proto = pe->p_proto;
/* copy official name */
cp = pdptr->line;
eob = pdptr->line + sizeof(pdptr->line);
if ((n = strlen(pe->p_name) + 1) < (eob - cp)) {
strcpy(cp, pe->p_name);
pptr->p_name = cp;
cp += n;
} else {
return (-1);
}
/* copy aliases */
i = 0;
pptr->p_aliases = pdptr->proto_aliases;
while (pe->p_aliases[i] && i < (_MAXALIASES-1)) {
if ((n = strlen(pe->p_aliases[i]) + 1) < (eob - cp)) {
strcpy(cp, pe->p_aliases[i]);
pptr->p_aliases[i] = cp;
cp += n;
} else {
break;
}
i++;
}
pptr->p_aliases[i] = NULL;
return (PROTO_R_OK);
}
#endif /* PROTOENT_DATA */
#else /* PROTO_R_RETURN */
static int getprotoent_r_unknown_systemm = 0;
#endif /* PROTO_R_RETURN */
#endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */