diff options
Diffstat (limited to 'missing/getnameinfo.c')
| -rw-r--r-- | missing/getnameinfo.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/missing/getnameinfo.c b/missing/getnameinfo.c deleted file mode 100644 index c287221..0000000 --- a/missing/getnameinfo.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. - * 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 project 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 PROJECT 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 PROJECT 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. - */ - -/* - * Issues to be discussed: - * - Thread safe-ness must be checked - * - Return values. There seems to be no standard for return value (RFC2553) - * but INRIA implementation returns EAI_xxx defined for getaddrinfo(). - * - RFC2553 says that we should raise error on short buffer. X/Open says - * we need to truncate the result. We obey RFC2553 (and X/Open should be - * modified). - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/missing/getnameinfo.c,v 1.11 2003-11-16 09:36:49 guy Exp $"; -#endif - -#include <sys/types.h> -#include <sys/socket.h> -#include <net/if.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <arpa/nameser.h> -#include <netdb.h> -#include <resolv.h> -#include <string.h> -#include <stddef.h> -#include <errno.h> - -#ifdef NEED_ADDRINFO_H -#include "addrinfo.h" -#endif - -#define SUCCESS 0 -#define ANY 0 -#define YES 1 -#define NO 0 - -static struct afd { - int a_af; - int a_addrlen; - int a_socklen; - int a_off; -} afdl [] = { -#ifdef INET6 - {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6), - offsetof(struct sockaddr_in6, sin6_addr)}, -#endif - {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in), - offsetof(struct sockaddr_in, sin_addr)}, - {0, 0, 0}, -}; - -struct sockinet { - u_char si_len; - u_char si_family; - u_short si_port; -}; - -#define ENI_NOSOCKET 0 -#define ENI_NOSERVNAME 1 -#define ENI_NOHOSTNAME 2 -#define ENI_MEMORY 3 -#define ENI_SYSTEM 4 -#define ENI_FAMILY 5 -#define ENI_SALEN 6 - -int -getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) - const struct sockaddr *sa; - size_t salen; - char *host; - size_t hostlen; - char *serv; - size_t servlen; - int flags; -{ - struct afd *afd; - struct servent *sp; - struct hostent *hp; - u_short port; - int family, i; - char *addr, *p; - u_int32_t v4a; - int h_error; - char numserv[512]; - char numaddr[512]; - - if (sa == NULL) - return ENI_NOSOCKET; - -#ifdef HAVE_SA_LEN /*XXX*/ - if (sa->sa_len != salen) - return ENI_SALEN; -#endif - - family = sa->sa_family; - for (i = 0; afdl[i].a_af; i++) - if (afdl[i].a_af == family) { - afd = &afdl[i]; - goto found; - } - return ENI_FAMILY; - - found: - if (salen != afd->a_socklen) - return ENI_SALEN; - - port = ((struct sockinet *)sa)->si_port; /* network byte order */ - addr = (char *)sa + afd->a_off; - - if (serv == NULL || servlen == 0) { - /* - * do nothing in this case. - * in case you are wondering if "&&" is more correct than - * "||" here: RFC2553 says that serv == NULL OR servlen == 0 - * means that the caller does not want the result. - */ - } else { - if (flags & NI_NUMERICSERV) - sp = NULL; - else { - sp = getservbyport(port, - (flags & NI_DGRAM) ? "udp" : "tcp"); - } - if (sp) { - if (strlen(sp->s_name) + 1 > servlen) - return ENI_MEMORY; - strcpy(serv, sp->s_name); - } else { - snprintf(numserv, sizeof(numserv), "%d", ntohs(port)); - if (strlen(numserv) + 1 > servlen) - return ENI_MEMORY; - strcpy(serv, numserv); - } - } - - switch (sa->sa_family) { - case AF_INET: - v4a = (u_int32_t) - ntohl(((struct sockaddr_in *)sa)->sin_addr.s_addr); - if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a)) - flags |= NI_NUMERICHOST; - v4a >>= IN_CLASSA_NSHIFT; - if (v4a == 0) - flags |= NI_NUMERICHOST; - break; -#ifdef INET6 - case AF_INET6: - { - struct sockaddr_in6 *sin6; - sin6 = (struct sockaddr_in6 *)sa; - switch (sin6->sin6_addr.s6_addr[0]) { - case 0x00: - if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) - ; - else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) - ; - else - flags |= NI_NUMERICHOST; - break; - default: - if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { - flags |= NI_NUMERICHOST; - } - else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) - flags |= NI_NUMERICHOST; - break; - } - } - break; -#endif - } - if (host == NULL || hostlen == 0) { - /* - * do nothing in this case. - * in case you are wondering if "&&" is more correct than - * "||" here: RFC2553 says that host == NULL OR hostlen == 0 - * means that the caller does not want the result. - */ - } else if (flags & NI_NUMERICHOST) { - /* NUMERICHOST and NAMEREQD conflicts with each other */ - if (flags & NI_NAMEREQD) - return ENI_NOHOSTNAME; - if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr)) - == NULL) - return ENI_SYSTEM; - if (strlen(numaddr) + 1 > hostlen) - return ENI_MEMORY; - strcpy(host, numaddr); -#if defined(INET6) && defined(NI_WITHSCOPEID) - if (afd->a_af == AF_INET6 && - (IN6_IS_ADDR_LINKLOCAL((struct in6_addr *)addr) || - IN6_IS_ADDR_MULTICAST((struct in6_addr *)addr)) && - ((struct sockaddr_in6 *)sa)->sin6_scope_id) { -#ifndef ALWAYS_WITHSCOPE - if (flags & NI_WITHSCOPEID) -#endif /* !ALWAYS_WITHSCOPE */ - { - char *ep = strchr(host, '\0'); - unsigned int ifindex = - ((struct sockaddr_in6 *)sa)->sin6_scope_id; - - *ep = SCOPE_DELIMITER; - if ((if_indextoname(ifindex, ep + 1)) == NULL) - /* XXX what should we do? */ - strncpy(ep + 1, "???", 3); - } - } -#endif /* INET6 */ - } else { -#ifdef USE_GETIPNODEBY - hp = getipnodebyaddr(addr, afd->a_addrlen, afd->a_af, &h_error); -#else - hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af); -#ifdef HAVE_H_ERRNO - h_error = h_errno; -#else - h_error = EINVAL; -#endif -#endif - - if (hp) { - if (flags & NI_NOFQDN) { - p = strchr(hp->h_name, '.'); - if (p) *p = '\0'; - } - if (strlen(hp->h_name) + 1 > hostlen) { -#ifdef USE_GETIPNODEBY - freehostent(hp); -#endif - return ENI_MEMORY; - } - strcpy(host, hp->h_name); -#ifdef USE_GETIPNODEBY - freehostent(hp); -#endif - } else { - if (flags & NI_NAMEREQD) - return ENI_NOHOSTNAME; - if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr)) - == NULL) - return ENI_NOHOSTNAME; - if (strlen(numaddr) + 1 > hostlen) - return ENI_MEMORY; - strcpy(host, numaddr); - } - } - return SUCCESS; -} |