diff options
Diffstat (limited to 'lib/libc/net/getnameinfo.c')
-rw-r--r-- | lib/libc/net/getnameinfo.c | 464 |
1 files changed, 0 insertions, 464 deletions
diff --git a/lib/libc/net/getnameinfo.c b/lib/libc/net/getnameinfo.c deleted file mode 100644 index ffd34a1..0000000 --- a/lib/libc/net/getnameinfo.c +++ /dev/null @@ -1,464 +0,0 @@ -/* $KAME: getnameinfo.c,v 1.61 2002/06/27 09:25:47 itojun Exp $ */ - -/* - * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. - * Copyright (c) 2000 Ben Harris. - * 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> -__FBSDID("$FreeBSD$"); - -#include <sys/types.h> -#include <sys/socket.h> -#include <net/if.h> -#include <net/if_dl.h> -#include <net/if_types.h> -#include <net/firewire.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> - -static int getnameinfo_inet(const struct sockaddr *, socklen_t, char *, - size_t, char *, size_t, int); -#ifdef INET6 -static int ip6_parsenumeric(const struct sockaddr *, const char *, char *, - size_t, int); -static int ip6_sa2str(const struct sockaddr_in6 *, char *, size_t, int); -#endif -static int getnameinfo_link(const struct sockaddr *, socklen_t, char *, - size_t, char *, size_t, int); -static int hexname(const u_int8_t *, size_t, char *, size_t); - -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: -#ifdef INET6 - case AF_INET6: -#endif - return getnameinfo_inet(sa, salen, host, hostlen, serv, - servlen, flags); - case AF_LINK: - return getnameinfo_link(sa, salen, host, hostlen, serv, - servlen, flags); - default: - return EAI_FAMILY; - } -} - -static const struct afd { - int a_af; - size_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}, -}; - -struct sockinet { - u_char si_len; - u_char si_family; - u_short si_port; -}; - -static int -getnameinfo_inet(const struct sockaddr *sa, socklen_t salen, - char *host, size_t hostlen, char *serv, size_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; - int h_error; - char numserv[512]; - char numaddr[512]; - - if (sa == NULL) - return EAI_FAIL; - - 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 *)sa)->si_port; - addr = (const 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: 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 > servlen) - return EAI_MEMORY; - strlcpy(serv, sp->s_name, servlen); - } else { - snprintf(numserv, sizeof(numserv), "%u", ntohs(port)); - if (strlen(numserv) + 1 > servlen) - return EAI_MEMORY; - strlcpy(serv, numserv, servlen); - } - } - - switch (sa->sa_family) { - case AF_INET: - v4a = (u_int32_t) - ntohl(((const 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: - { - const struct sockaddr_in6 *sin6; - sin6 = (const 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: 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 > hostlen) /* don't forget terminator */ - return EAI_MEMORY; - strlcpy(host, numaddr, hostlen); - break; - } - } else { - hp = getipnodebyaddr(addr, afd->a_addrlen, afd->a_af, &h_error); - - 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 > hostlen) { - freehostent(hp); - return EAI_MEMORY; - } - strlcpy(host, hp->h_name, hostlen); - freehostent(hp); - } 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(const struct sockaddr *sa, const char *addr, - char *host, size_t hostlen, int flags) -{ - size_t numaddrlen; - char numaddr[512]; - - 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 *)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 (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(const struct sockaddr_in6 *sa6, char *buf, size_t bufsiz, int flags) -{ - unsigned int ifindex; - const struct in6_addr *a6; - int n; - - 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) || - IN6_IS_ADDR_MC_NODELOCAL(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, size_t hostlen, char *serv, size_t servlen, int flags) -{ - const struct sockaddr_dl *sdl = - (const struct sockaddr_dl *)(const void *)sa; - const struct fw_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#%d", sdl->sdl_index); - if (n > hostlen) { - *host = '\0'; - return EAI_MEMORY; - } - return 0; - } - - switch (sdl->sdl_type) { - case IFT_IEEE1394: - if (sdl->sdl_alen < sizeof(iha->sender_unique_ID_hi) + - sizeof(iha->sender_unique_ID_lo)) - return EAI_FAMILY; - iha = (const struct fw_hwaddr *)(const void *)LLADDR(sdl); - return hexname((const u_int8_t *)&iha->sender_unique_ID_hi, - sizeof(iha->sender_unique_ID_hi) + - sizeof(iha->sender_unique_ID_lo), - 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_BRIDGE (net/if_bridge.h> - */ - /* - * The following use IPv4 addresses as link-layer addresses: - * IFT_OTHER (net/if_gre.c) - * IFT_OTHER (netinet/ip_ipip.c) - */ - /* default below is believed correct for all these. */ - case IFT_ARCNET: - case IFT_ETHER: - case IFT_FDDI: - case IFT_HIPPI: - case IFT_ISO88025: - default: - return hexname((u_int8_t *)LLADDR(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, hostlen; -{ - int i, n; - char *outp = host; - - *outp = '\0'; - for (i = 0; i < len; i++) { - n = snprintf(outp, hostlen, "%s%02x", - i ? ":" : "", cp[i]); - if (n < 0 || n >= hostlen) { - *host = '\0'; - return EAI_MEMORY; - } - outp += n; - hostlen -= n; - } - return 0; -} |