diff options
Diffstat (limited to 'libc/netbsd/net/getnameinfo.c')
| -rw-r--r-- | libc/netbsd/net/getnameinfo.c | 519 |
1 files changed, 0 insertions, 519 deletions
diff --git a/libc/netbsd/net/getnameinfo.c b/libc/netbsd/net/getnameinfo.c deleted file mode 100644 index db04fbf..0000000 --- a/libc/netbsd/net/getnameinfo.c +++ /dev/null @@ -1,519 +0,0 @@ -/* $NetBSD: getnameinfo.c,v 1.43 2006/02/17 15:58:26 ginsbach Exp $ */ -/* $KAME: getnameinfo.c,v 1.45 2000/09/25 22:43:56 itojun Exp $ */ - -/* - * Copyright (c) 2000 Ben Harris. - * 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 - * - 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). ipngwg rough consensus seems to follow RFC2553. - * - What is "local" in NI_FQDN? - * - NI_NAMEREQD and NI_NUMERICHOST conflict with each other. - * - (KAME extension) always attach textual scopeid (fe80::1%lo0), if - * sin6_scope_id is filled - standardization status? - * XXX breaks backward compat for code that expects no scopeid. - * beware on merge. - */ - -#include <sys/cdefs.h> -#if defined(LIBC_SCCS) && !defined(lint) -__RCSID("$NetBSD: getnameinfo.c,v 1.43 2006/02/17 15:58:26 ginsbach Exp $"); -#endif /* LIBC_SCCS and not lint */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <net/if.h> -#include <net/if_dl.h> -#include <net/if_ieee1394.h> -#include <net/if_types.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include "arpa_nameser.h" -#include <assert.h> -#include <limits.h> -#include <netdb.h> -#ifdef ANDROID_CHANGES -#include "resolv_private.h" -#else -#include <resolv.h> -#endif -#include <stddef.h> -#include <string.h> - -static const struct afd { - int a_af; - socklen_t a_addrlen; - socklen_t 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, 0}, -}; - -struct sockinet { - u_char si_len; - u_char si_family; - u_short si_port; -}; - -static int getnameinfo_inet __P((const struct sockaddr *, socklen_t, char *, - socklen_t, char *, socklen_t, int)); -#ifdef INET6 -static int ip6_parsenumeric __P((const struct sockaddr *, const char *, char *, - socklen_t, int)); -static int ip6_sa2str __P((const struct sockaddr_in6 *, char *, size_t, - int)); -#endif -static int getnameinfo_link __P((const struct sockaddr *, socklen_t, char *, - socklen_t, char *, socklen_t, int)); -static int hexname __P((const u_int8_t *, size_t, char *, socklen_t)); - -/* - * Top-level getnameinfo() code. Look at the address family, and pick an - * appropriate function to call. - */ -int getnameinfo(const struct sockaddr* sa, socklen_t salen, char* host, size_t hostlen, char* serv, size_t servlen, int flags) -{ - switch (sa->sa_family) { - case AF_INET: - case AF_INET6: - return getnameinfo_inet(sa, salen, host, hostlen, - serv, servlen, flags); -#if 0 - case AF_LINK: - return getnameinfo_link(sa, salen, host, hostlen, - serv, servlen, flags); -#endif - default: - return EAI_FAMILY; - } -} - - -/* - * getnameinfo_inet(): - * Format an IPv4 or IPv6 sockaddr into a printable string. - */ -static int -getnameinfo_inet(sa, salen, host, hostlen, serv, servlen, flags) - const struct sockaddr *sa; - socklen_t salen; - char *host; - socklen_t hostlen; - char *serv; - socklen_t servlen; - int flags; -{ - const struct afd *afd; - struct servent *sp; - struct hostent *hp; - u_short port; - int family, i; - const char *addr; - u_int32_t v4a; - char numserv[512]; - char numaddr[512]; - - /* sa is checked below */ - /* host may be NULL */ - /* serv may be NULL */ - - if (sa == NULL) - return EAI_FAIL; - -#ifdef BSD4_4 - if (sa->sa_len != salen) - return EAI_FAIL; -#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 EAI_FAMILY; - - found: - if (salen != afd->a_socklen) - return EAI_FAIL; - - /* network byte order */ - port = ((const struct sockinet *)(const void *)sa)->si_port; - addr = (const char *)(const void *)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: rfc2553bis-03 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 > (size_t)servlen) - return EAI_MEMORY; - strlcpy(serv, sp->s_name, servlen); - } else { - snprintf(numserv, sizeof(numserv), "%u", ntohs(port)); - if (strlen(numserv) + 1 > (size_t)servlen) - return EAI_MEMORY; - strlcpy(serv, numserv, servlen); - } - } - - switch (sa->sa_family) { - case AF_INET: - v4a = (u_int32_t) - ntohl(((const struct sockaddr_in *) - (const void *)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: - { - const struct sockaddr_in6 *sin6; - sin6 = (const struct sockaddr_in6 *)(const void *)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: rfc2553bis-03 says that host == NULL or - * hostlen == 0 means that the caller does not want the result. - */ - } else if (flags & NI_NUMERICHOST) { - size_t numaddrlen; - - /* NUMERICHOST and NAMEREQD conflicts with each other */ - if (flags & NI_NAMEREQD) - return EAI_NONAME; - - switch(afd->a_af) { -#ifdef INET6 - case AF_INET6: - { - int error; - - if ((error = ip6_parsenumeric(sa, addr, host, - hostlen, flags)) != 0) - return(error); - break; - } -#endif - default: - if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr)) - == NULL) - return EAI_SYSTEM; - numaddrlen = strlen(numaddr); - if (numaddrlen + 1 > (size_t)hostlen) /* don't forget terminator */ - return EAI_MEMORY; - strlcpy(host, numaddr, hostlen); - break; - } - } else { - hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af); - - if (hp) { -#if 0 - /* - * commented out, since "for local host" is not - * implemented here - see RFC2553 p30 - */ - if (flags & NI_NOFQDN) { - char *p; - p = strchr(hp->h_name, '.'); - if (p) - *p = '\0'; - } -#endif - if (strlen(hp->h_name) + 1 > (size_t)hostlen) { - return EAI_MEMORY; - } - strlcpy(host, hp->h_name, hostlen); - } else { - if (flags & NI_NAMEREQD) - return EAI_NONAME; - switch(afd->a_af) { -#ifdef INET6 - case AF_INET6: - { - int error; - - if ((error = ip6_parsenumeric(sa, addr, host, - hostlen, - flags)) != 0) - return(error); - break; - } -#endif - default: - if (inet_ntop(afd->a_af, addr, host, - hostlen) == NULL) - return EAI_SYSTEM; - break; - } - } - } - return(0); -} - -#ifdef INET6 -static int -ip6_parsenumeric(sa, addr, host, hostlen, flags) - const struct sockaddr *sa; - const char *addr; - char *host; - socklen_t hostlen; - int flags; -{ - size_t numaddrlen; - char numaddr[512]; - - assert(sa != NULL); - assert(addr != NULL); - assert(host != NULL); - - if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL) - return EAI_SYSTEM; - - numaddrlen = strlen(numaddr); - if (numaddrlen + 1 > hostlen) /* don't forget terminator */ - return EAI_OVERFLOW; - strlcpy(host, numaddr, hostlen); - - if (((const struct sockaddr_in6 *)(const void *)sa)->sin6_scope_id) { - char zonebuf[MAXHOSTNAMELEN]; - int zonelen; - - zonelen = ip6_sa2str( - (const struct sockaddr_in6 *)(const void *)sa, - zonebuf, sizeof(zonebuf), flags); - if (zonelen < 0) - return EAI_OVERFLOW; - if ((size_t) zonelen + 1 + numaddrlen + 1 > hostlen) - return EAI_OVERFLOW; - /* construct <numeric-addr><delim><zoneid> */ - memcpy(host + numaddrlen + 1, zonebuf, - (size_t)zonelen); - host[numaddrlen] = SCOPE_DELIMITER; - host[numaddrlen + 1 + zonelen] = '\0'; - } - - return 0; -} - -/* ARGSUSED */ -static int -ip6_sa2str(sa6, buf, bufsiz, flags) - const struct sockaddr_in6 *sa6; - char *buf; - size_t bufsiz; - int flags; -{ - unsigned int ifindex; - const struct in6_addr *a6; - int n; - - assert(sa6 != NULL); - assert(buf != NULL); - - ifindex = (unsigned int)sa6->sin6_scope_id; - a6 = &sa6->sin6_addr; - -#ifdef NI_NUMERICSCOPE - if ((flags & NI_NUMERICSCOPE) != 0) { - n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id); - if (n < 0 || n >= bufsiz) - return -1; - else - return n; - } -#endif - - /* if_indextoname() does not take buffer size. not a good api... */ - if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6)) && - bufsiz >= IF_NAMESIZE) { - char *p = if_indextoname(ifindex, buf); - if (p) { - return(strlen(p)); - } - } - - /* last resort */ - n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id); - if (n < 0 || (size_t) n >= bufsiz) - return -1; - else - return n; -} -#endif /* INET6 */ - - -/* - * getnameinfo_link(): - * Format a link-layer address into a printable format, paying attention to - * the interface type. - */ -/* ARGSUSED */ -static int -getnameinfo_link(const struct sockaddr *sa, socklen_t salen, - char *host, socklen_t hostlen, char *serv, socklen_t servlen, - int flags) -{ - const struct sockaddr_dl *sdl = - (const struct sockaddr_dl *)(const void *)sa; - const struct ieee1394_hwaddr *iha; - int n; - - if (serv != NULL && servlen > 0) - *serv = '\0'; - - if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && sdl->sdl_slen == 0) { - n = snprintf(host, hostlen, "link#%u", sdl->sdl_index); - if (n < 0 || (socklen_t) n > hostlen) { - *host = '\0'; - return EAI_MEMORY; - } - return 0; - } - - switch (sdl->sdl_type) { -#ifdef IFT_ECONET - case IFT_ECONET: - if (sdl->sdl_alen < 2) - return EAI_FAMILY; - if (CLLADDR(sdl)[1] == 0) - n = snprintf(host, hostlen, "%u", CLLADDR(sdl)[0]); - else - n = snprintf(host, hostlen, "%u.%u", - CLLADDR(sdl)[1], CLLADDR(sdl)[0]); - if (n < 0 || (socklen_t) n >= hostlen) { - *host = '\0'; - return EAI_MEMORY; - } else - return 0; -#endif - case IFT_IEEE1394: - if (sdl->sdl_alen < sizeof(iha->iha_uid)) - return EAI_FAMILY; - iha = - (const struct ieee1394_hwaddr *)(const void *)CLLADDR(sdl); - return hexname(iha->iha_uid, sizeof(iha->iha_uid), - host, hostlen); - /* - * The following have zero-length addresses. - * IFT_ATM (net/if_atmsubr.c) - * IFT_FAITH (net/if_faith.c) - * IFT_GIF (net/if_gif.c) - * IFT_LOOP (net/if_loop.c) - * IFT_PPP (net/if_ppp.c, net/if_spppsubr.c) - * IFT_SLIP (net/if_sl.c, net/if_strip.c) - * IFT_STF (net/if_stf.c) - * IFT_L2VLAN (net/if_vlan.c) - * IFT_PROPVIRTUAL (net/if_bridge.h> - */ - /* - * The following use IPv4 addresses as link-layer addresses: - * IFT_OTHER (net/if_gre.c) - */ - case IFT_ARCNET: /* default below is believed correct for all these. */ - case IFT_ETHER: - case IFT_FDDI: - case IFT_HIPPI: - case IFT_ISO88025: - default: - return hexname((const u_int8_t *)CLLADDR(sdl), - (size_t)sdl->sdl_alen, host, hostlen); - } -} - -static int -hexname(cp, len, host, hostlen) - const u_int8_t *cp; - char *host; - size_t len; - socklen_t hostlen; -{ - int n; - size_t i; - char *outp = host; - - *outp = '\0'; - for (i = 0; i < len; i++) { - n = snprintf(outp, hostlen, "%s%02x", - i ? ":" : "", cp[i]); - if (n < 0 || (socklen_t) n >= hostlen) { - *host = '\0'; - return EAI_MEMORY; - } - outp += n; - hostlen -= n; - } - return 0; -} |