ca81c3971c
Mostly, several functions that take pointers as arguments, almost always char * pointers, had those pointers qualified with "const". Those that returned pointers to previously const-qualified arguments had their return values qualified as const. Some structure members were qualified as const to retain that attribute from the variables from which they were assigned. Minor other ISC style cleanups.
241 lines
6.2 KiB
C
241 lines
6.2 KiB
C
/*
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* Issues to be discussed:
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* - Return values. There seems to be no standard for return value (RFC2553)
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* but INRIA implementation returns EAI_xxx defined for getaddrinfo().
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*/
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by WIDE Project and
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* its contributors.
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* 4. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <config.h>
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#include <stdio.h>
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#include <string.h>
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#include <lwres/lwres.h>
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#include <lwres/net.h>
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#include <lwres/netdb.h>
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#include "assert_p.h"
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#define SUCCESS 0
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static struct afd {
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int a_af;
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size_t a_addrlen;
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size_t a_socklen;
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} afdl [] = {
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/* first entry is linked last... */
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{AF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in)},
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{AF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6)},
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{0, 0, 0},
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};
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#define ENI_NOSOCKET 0
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#define ENI_NOSERVNAME 1
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#define ENI_NOHOSTNAME 2
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#define ENI_MEMORY 3
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#define ENI_SYSTEM 4
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#define ENI_FAMILY 5
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#define ENI_SALEN 6
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/*
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* The test against 0 is there to keep the Solaris compiler
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* from complaining about "end-of-loop code not reached".
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*/
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#define ERR(code) \
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do { result = (code); \
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if (result != 0) goto cleanup; \
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} while (0)
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int
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lwres_getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
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size_t hostlen, char *serv, size_t servlen, int flags)
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{
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struct afd *afd;
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struct servent *sp;
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u_short port;
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#ifdef ISC_PLATFORM_HAVESALEN
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size_t len;
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#endif
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int family, i;
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const void *addr;
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char *p;
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#if 0
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u_long v4a;
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u_char pfx;
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#endif
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char numserv[sizeof("65000")];
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char numaddr[sizeof("abcd:abcd:abcd:abcd:abcd:abcd:255.255.255.255")];
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const char *proto;
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lwres_uint32_t lwf = 0;
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lwres_context_t *lwrctx = NULL;
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lwres_gnbaresponse_t *by = NULL;
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int result = SUCCESS;
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int n;
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if (sa == NULL)
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ERR(ENI_NOSOCKET);
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#ifdef ISC_PLATFORM_HAVESALEN
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len = sa->sa_len;
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if (len != salen)
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ERR(ENI_SALEN);
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#endif
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family = sa->sa_family;
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for (i = 0; afdl[i].a_af; i++)
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if (afdl[i].a_af == family) {
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afd = &afdl[i];
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goto found;
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}
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ERR(ENI_FAMILY);
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found:
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if (salen != afd->a_socklen)
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ERR(ENI_SALEN);
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switch (family) {
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case AF_INET:
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port = ((const struct sockaddr_in *)sa)->sin_port;
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addr = &((const struct sockaddr_in *)sa)->sin_addr.s_addr;
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break;
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case AF_INET6:
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port = ((const struct sockaddr_in6 *)sa)->sin6_port;
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addr = ((const struct sockaddr_in6 *)sa)->sin6_addr.s6_addr;
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break;
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default:
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port = 0;
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addr = NULL;
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INSIST(0);
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}
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proto = (flags & NI_DGRAM) ? "udp" : "tcp";
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if (serv == NULL || servlen == 0) {
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/*
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* Caller does not want service.
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*/
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} else if ((flags & NI_NUMERICSERV) != 0 ||
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(sp = getservbyport(port, proto)) == NULL) {
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sprintf(numserv, "%d", ntohs(port));
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if ((strlen(numserv) + 1) > servlen)
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ERR(ENI_MEMORY);
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strcpy(serv, numserv);
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} else {
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if ((strlen(sp->s_name) + 1) > servlen)
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ERR(ENI_MEMORY);
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strcpy(serv, sp->s_name);
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}
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#if 0
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switch (sa->sa_family) {
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case AF_INET:
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v4a = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
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if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
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flags |= NI_NUMERICHOST;
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v4a >>= IN_CLASSA_NSHIFT;
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if (v4a == 0 || v4a == IN_LOOPBACKNET)
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flags |= NI_NUMERICHOST;
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break;
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case AF_INET6:
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pfx = ((struct sockaddr_in6 *)sa)->sin6_addr.s6_addr[0];
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if (pfx == 0 || pfx == 0xfe || pfx == 0xff)
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flags |= NI_NUMERICHOST;
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break;
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}
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#endif
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if (host == NULL || hostlen == 0) {
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/* what should we do? */
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} else if (flags & NI_NUMERICHOST) {
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if (lwres_net_ntop(afd->a_af, addr, numaddr, sizeof(numaddr))
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== NULL)
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ERR(ENI_SYSTEM);
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if (strlen(numaddr) > hostlen)
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ERR(ENI_MEMORY);
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strcpy(host, numaddr);
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} else {
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switch (family) {
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case AF_INET:
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lwf = LWRES_ADDRTYPE_V4;
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break;
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case AF_INET6:
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lwf = LWRES_ADDRTYPE_V6;
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break;
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default:
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INSIST(0);
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}
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n = lwres_context_create(&lwrctx, NULL, NULL, NULL);
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if (n == 0)
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n = lwres_getnamebyaddr(lwrctx, lwf, afd->a_addrlen,
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addr, &by);
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if (n == 0) {
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if (flags & NI_NOFQDN) {
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p = strchr(by->realname, '.');
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if (p)
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*p = '\0';
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}
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if ((strlen(by->realname) + 1) > hostlen)
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ERR(ENI_MEMORY);
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strcpy(host, by->realname);
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} else {
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if (flags & NI_NAMEREQD)
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ERR(ENI_NOHOSTNAME);
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if (lwres_net_ntop(afd->a_af, addr, numaddr,
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sizeof(numaddr))
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== NULL)
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ERR(ENI_NOHOSTNAME);
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if ((strlen(numaddr) + 1) > hostlen)
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ERR(ENI_MEMORY);
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strcpy(host, numaddr);
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}
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lwres_context_destroy(&lwrctx);
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}
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result = SUCCESS;
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cleanup:
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if (by != NULL)
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lwres_gnbaresponse_free(lwrctx, &by);
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if (lwrctx != NULL)
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lwres_context_destroy(&lwrctx);
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return (result);
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}
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