1d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes/* $NetBSD: getnameinfo.c,v 1.53 2012/09/26 23:13:00 christos Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $KAME: getnameinfo.c,v 1.45 2000/09/25 22:43:56 itojun Exp $ */ 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 2000 Ben Harris. 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the project nor the names of its contributors 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Issues to be discussed: 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - Thread safe-ness must be checked 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - RFC2553 says that we should raise error on short buffer. X/Open says 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * we need to truncate the result. We obey RFC2553 (and X/Open should be 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modified). ipngwg rough consensus seems to follow RFC2553. 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - What is "local" in NI_FQDN? 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - NI_NAMEREQD and NI_NUMERICHOST conflict with each other. 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - (KAME extension) always attach textual scopeid (fe80::1%lo0), if 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * sin6_scope_id is filled - standardization status? 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * XXX breaks backward compat for code that expects no scopeid. 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * beware on merge. 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/cdefs.h> 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#if defined(LIBC_SCCS) && !defined(lint) 50d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes__RCSID("$NetBSD: getnameinfo.c,v 1.53 2012/09/26 23:13:00 christos Exp $"); 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif /* LIBC_SCCS and not lint */ 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/types.h> 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/socket.h> 55d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes#include <sys/un.h> 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <net/if.h> 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <net/if_ieee1394.h> 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <net/if_types.h> 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <netinet/in.h> 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <arpa/inet.h> 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <assert.h> 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <limits.h> 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <netdb.h> 64d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes#include "arpa_nameser.h" 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "resolv_private.h" 66149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk#include <sys/system_properties.h> 67149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk#include <stdlib.h> 68149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk#include <unistd.h> 69149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk#include <errno.h> 70d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes#define MIN(x,y) ((x) < (y) ? (x) : (y)) 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stddef.h> 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <string.h> 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const struct afd { 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int a_af; 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project socklen_t a_addrlen; 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project socklen_t a_socklen; 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int a_off; 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} afdl [] = { 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef INET6 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6), 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project offsetof(struct sockaddr_in6, sin6_addr)}, 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in), 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project offsetof(struct sockaddr_in, sin_addr)}, 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project {0, 0, 0, 0}, 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project}; 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstruct sockinet { 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u_char si_len; 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u_char si_family; 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u_short si_port; 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project}; 941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 95d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesstatic int getnameinfo_inet(const struct sockaddr *, socklen_t, char *, 96c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker socklen_t, char *, socklen_t, int, const char*, int); 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef INET6 98d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesstatic int ip6_parsenumeric(const struct sockaddr *, const char *, char *, 99d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes socklen_t, int); 100d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesstatic int ip6_sa2str(const struct sockaddr_in6 *, char *, size_t, int); 1015056f1fad1187cd67729bb04ba72397d78256f03Elliott Hughes#endif 102d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesstatic int getnameinfo_local(const struct sockaddr *, socklen_t, char *, 103d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes socklen_t, char *, socklen_t, int); 10406e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun 1051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 1061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Top-level getnameinfo() code. Look at the address family, and pick an 1071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * appropriate function to call. 1081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 1091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint getnameinfo(const struct sockaddr* sa, socklen_t salen, char* host, size_t hostlen, char* serv, size_t servlen, int flags) 1101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 111c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker return android_getnameinfoforiface(sa, salen, host, hostlen, serv, servlen, flags, NULL, 0); 112c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk} 113c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 114c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubakerint android_getnameinfoforiface(const struct sockaddr* sa, socklen_t salen, char* host, size_t hostlen, char* serv, size_t servlen, int flags, const char* iface, int mark) 115c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk{ 1161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (sa->sa_family) { 1171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 1181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 1191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return getnameinfo_inet(sa, salen, host, hostlen, 120c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker serv, servlen, flags, iface, mark); 121d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes case AF_LOCAL: 122d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes return getnameinfo_local(sa, salen, host, hostlen, 123b002a2ff77759b3852a0aa38aa95c07a066faecfRobert Greenwalt serv, servlen, flags); 1241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 1251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_FAMILY; 1261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 128b002a2ff77759b3852a0aa38aa95c07a066faecfRobert Greenwalt 129d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes/* 130d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes * getnameinfo_local(): 131d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes * Format an local address into a printable format. 132d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes */ 133d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes/* ARGSUSED */ 134d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesstatic int 135d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesgetnameinfo_local(const struct sockaddr *sa, socklen_t salen, 136d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes char *host, socklen_t hostlen, char *serv, socklen_t servlen, 137d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes int flags __attribute__((unused))) 138d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes{ 139d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes const struct sockaddr_un *sun = 140d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes (const struct sockaddr_un *)(const void *)sa; 141d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes 142d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes if (salen < (socklen_t) offsetof(struct sockaddr_un, sun_path)) { 143d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes return EAI_FAMILY; 144d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes } 145d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes 146d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes if (serv != NULL && servlen > 0) 147d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes serv[0] = '\0'; 148d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes 149d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes if (host && hostlen > 0) 150d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes strlcpy(host, sun->sun_path, 151d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes MIN((socklen_t) sizeof(sun->sun_path) + 1, hostlen)); 152d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes 153d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes return 0; 154d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes} 155d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes 156149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk/* On success length of the host name is returned. A return 157149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk * value of 0 means there's no host name associated with 158149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk * the address. On failure -1 is returned in which case 159149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk * normal execution flow shall continue. */ 160149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falkstatic int 161c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubakerandroid_gethostbyaddr_proxy(char* nameBuf, size_t nameBufLen, const void *addr, socklen_t addrLen, int addrFamily, const char* iface, int mark) 162c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk{ 163c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk struct hostent *hostResult = 164c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker android_gethostbyaddrforiface_proxy(addr, addrLen, addrFamily, iface, mark); 165149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk 166c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (hostResult == NULL) return 0; 167149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk 168c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk int lengthResult = strlen(hostResult->h_name); 169149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk 170c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (nameBuf) strncpy(nameBuf, hostResult->h_name, nameBufLen); 171c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk return lengthResult; 172149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk} 173d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes 1741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 1751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * getnameinfo_inet(): 1761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Format an IPv4 or IPv6 sockaddr into a printable string. 1771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 1781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic int 179d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesgetnameinfo_inet(const struct sockaddr* sa, socklen_t salen, 180d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes char *host, socklen_t hostlen, 181d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes char *serv, socklen_t servlen, 182c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker int flags, const char* iface, int mark) 1831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 1841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const struct afd *afd; 1851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project struct servent *sp; 1861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project struct hostent *hp; 1871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u_short port; 1881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int family, i; 1891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *addr; 190d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes uint32_t v4a; 1911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char numserv[512]; 1921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char numaddr[512]; 1931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* sa is checked below */ 1951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* host may be NULL */ 1961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* serv may be NULL */ 1971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (sa == NULL) 1991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_FAIL; 2001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project family = sa->sa_family; 2021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (i = 0; afdl[i].a_af; i++) 2031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (afdl[i].a_af == family) { 2041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project afd = &afdl[i]; 2051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project goto found; 2061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_FAMILY; 2081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project found: 210d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes // http://b/1889275: callers should be allowed to provide too much 211d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes // space, but not too little. 212d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes if (salen < afd->a_socklen) { 213d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes return EAI_FAMILY; 214d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes } 2151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* network byte order */ 2171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project port = ((const struct sockinet *)(const void *)sa)->si_port; 2181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project addr = (const char *)(const void *)sa + afd->a_off; 2191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (serv == NULL || servlen == 0) { 2211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 2221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * do nothing in this case. 2231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * in case you are wondering if "&&" is more correct than 2241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * "||" here: rfc2553bis-03 says that serv == NULL OR 2251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * servlen == 0 means that the caller does not want the result. 2261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 2271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 2281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (flags & NI_NUMERICSERV) 2291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project sp = NULL; 2301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else { 2311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project sp = getservbyport(port, 2321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (flags & NI_DGRAM) ? "udp" : "tcp"); 2331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (sp) { 2351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (strlen(sp->s_name) + 1 > (size_t)servlen) 2361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_MEMORY; 2371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(serv, sp->s_name, servlen); 2381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 2391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project snprintf(numserv, sizeof(numserv), "%u", ntohs(port)); 2401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (strlen(numserv) + 1 > (size_t)servlen) 2411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_MEMORY; 2421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(serv, numserv, servlen); 2431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (sa->sa_family) { 2471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 248d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes v4a = (uint32_t) 2491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ntohl(((const struct sockaddr_in *) 2501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (const void *)sa)->sin_addr.s_addr); 2511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a)) 2521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project flags |= NI_NUMERICHOST; 2531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project v4a >>= IN_CLASSA_NSHIFT; 2541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (v4a == 0) 2551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project flags |= NI_NUMERICHOST; 2561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 2571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef INET6 2581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 2591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 2601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const struct sockaddr_in6 *sin6; 2611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project sin6 = (const struct sockaddr_in6 *)(const void *)sa; 2621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (sin6->sin6_addr.s6_addr[0]) { 2631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case 0x00: 2641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ; 2661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 2671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ; 2681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 2691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project flags |= NI_NUMERICHOST; 2701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 2711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 2721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project flags |= NI_NUMERICHOST; 2741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 2761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project flags |= NI_NUMERICHOST; 2771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 2781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 2811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 2821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (host == NULL || hostlen == 0) { 2841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 2851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * do nothing in this case. 2861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * in case you are wondering if "&&" is more correct than 2871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * "||" here: rfc2553bis-03 says that host == NULL or 2881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * hostlen == 0 means that the caller does not want the result. 2891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 2901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else if (flags & NI_NUMERICHOST) { 2911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project size_t numaddrlen; 2921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* NUMERICHOST and NAMEREQD conflicts with each other */ 2941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (flags & NI_NAMEREQD) 2951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_NONAME; 2961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch(afd->a_af) { 2981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef INET6 2991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 3001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 3011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int error; 3021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((error = ip6_parsenumeric(sa, addr, host, 3041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hostlen, flags)) != 0) 3051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return(error); 3061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 3071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 3091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 3101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr)) 3111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project == NULL) 3121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_SYSTEM; 3131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project numaddrlen = strlen(numaddr); 3141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (numaddrlen + 1 > (size_t)hostlen) /* don't forget terminator */ 3151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_MEMORY; 3161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(host, numaddr, hostlen); 3171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 3181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 320149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk struct hostent android_proxy_hostent; 321149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk char android_proxy_buf[MAXDNAME]; 322149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk 32306e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun int hostnamelen = android_gethostbyaddr_proxy(android_proxy_buf, 324c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker MAXDNAME, addr, afd->a_addrlen, afd->a_af, iface, mark); 32506e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun if (hostnamelen > 0) { 32606e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun hp = &android_proxy_hostent; 32706e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun hp->h_name = android_proxy_buf; 32806e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun } else if (!hostnamelen) { 32906e1831f194389b6f56ac016ebb52ed5cd430bb2Selim Gurun hp = NULL; 330149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk } else { 331c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker hp = android_gethostbyaddrforiface(addr, afd->a_addrlen, afd->a_af, 332c39214e0ac49b9f7de6fd9989331145c6e1cd584Chad Brubaker iface, mark); 333149f7dfe0416f19a729d83bf5cfde44b5e28e0ecMattias Falk } 3341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (hp) { 336d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes#if 0 3371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 3381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * commented out, since "for local host" is not 3391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * implemented here - see RFC2553 p30 3401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 3411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (flags & NI_NOFQDN) { 3421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char *p; 3431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project p = strchr(hp->h_name, '.'); 3441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (p) 3451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *p = '\0'; 3461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 3481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (strlen(hp->h_name) + 1 > (size_t)hostlen) { 3491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_MEMORY; 3501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(host, hp->h_name, hostlen); 3521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 3531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (flags & NI_NAMEREQD) 3541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_NONAME; 3551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch(afd->a_af) { 3561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef INET6 3571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 3581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 3591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int error; 3601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((error = ip6_parsenumeric(sa, addr, host, 3621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hostlen, 3631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project flags)) != 0) 3641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return(error); 3651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 3661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 3681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 3691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (inet_ntop(afd->a_af, addr, host, 3701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hostlen) == NULL) 3711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_SYSTEM; 3721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 3731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return(0); 3771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 3781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef INET6 3801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic int 381d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesip6_parsenumeric(const struct sockaddr *sa, const char *addr, char *host, 382d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughes socklen_t hostlen, int flags) 3831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 3841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project size_t numaddrlen; 3851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char numaddr[512]; 3861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project assert(sa != NULL); 3881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project assert(addr != NULL); 3891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project assert(host != NULL); 3901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL) 3921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_SYSTEM; 3931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project numaddrlen = strlen(numaddr); 39550ace4fec5e8cb5afcbc656a4556fa528adfd760David 'Digit' Turner if (numaddrlen + 1 > (size_t)hostlen) /* don't forget terminator */ 3961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_OVERFLOW; 3971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(host, numaddr, hostlen); 3981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 3991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (((const struct sockaddr_in6 *)(const void *)sa)->sin6_scope_id) { 4001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char zonebuf[MAXHOSTNAMELEN]; 4011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int zonelen; 4021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project zonelen = ip6_sa2str( 4041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (const struct sockaddr_in6 *)(const void *)sa, 4051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project zonebuf, sizeof(zonebuf), flags); 4061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (zonelen < 0) 4071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_OVERFLOW; 40850ace4fec5e8cb5afcbc656a4556fa528adfd760David 'Digit' Turner if ((size_t) zonelen + 1 + numaddrlen + 1 > (size_t)hostlen) 4091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return EAI_OVERFLOW; 4101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* construct <numeric-addr><delim><zoneid> */ 4111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project memcpy(host + numaddrlen + 1, zonebuf, 4121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (size_t)zonelen); 4131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project host[numaddrlen] = SCOPE_DELIMITER; 4141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project host[numaddrlen + 1 + zonelen] = '\0'; 4151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return 0; 4181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 4191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* ARGSUSED */ 4211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic int 422d8213bb5738ac778fcb5d696d1294b0f8ddae7f3Elliott Hughesip6_sa2str(const struct sockaddr_in6 *sa6, char *buf, size_t bufsiz, int flags) 4231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 4241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project unsigned int ifindex; 4251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const struct in6_addr *a6; 4261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int n; 4271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project assert(sa6 != NULL); 4291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project assert(buf != NULL); 4301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ifindex = (unsigned int)sa6->sin6_scope_id; 4321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project a6 = &sa6->sin6_addr; 4331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef NI_NUMERICSCOPE 4351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((flags & NI_NUMERICSCOPE) != 0) { 4361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id); 4371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n < 0 || n >= bufsiz) 4381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 4391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 4401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return n; 4411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 4431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* if_indextoname() does not take buffer size. not a good api... */ 4451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6)) && 4461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bufsiz >= IF_NAMESIZE) { 4471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char *p = if_indextoname(ifindex, buf); 4481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (p) { 4491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return(strlen(p)); 4501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* last resort */ 4541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id); 4551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n < 0 || (size_t) n >= bufsiz) 4561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 4571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 4581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return n; 4591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 4601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif /* INET6 */ 461