1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 3*0Sstevel@tonic-gate * Use is subject to license terms. 4*0Sstevel@tonic-gate */ 5*0Sstevel@tonic-gate 6*0Sstevel@tonic-gate /* 7*0Sstevel@tonic-gate * Issues to be discussed: 8*0Sstevel@tonic-gate * - Thread safe-ness must be checked 9*0Sstevel@tonic-gate */ 10*0Sstevel@tonic-gate 11*0Sstevel@tonic-gate /* 12*0Sstevel@tonic-gate * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 13*0Sstevel@tonic-gate * All rights reserved. 14*0Sstevel@tonic-gate * 15*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 16*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 17*0Sstevel@tonic-gate * are met: 18*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright 19*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 20*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 21*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 22*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 23*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 24*0Sstevel@tonic-gate * must display the following acknowledgement: 25*0Sstevel@tonic-gate * This product includes software developed by WIDE Project and 26*0Sstevel@tonic-gate * its contributors. 27*0Sstevel@tonic-gate * 4. Neither the name of the project nor the names of its contributors 28*0Sstevel@tonic-gate * may be used to endorse or promote products derived from this software 29*0Sstevel@tonic-gate * without specific prior written permission. 30*0Sstevel@tonic-gate * 31*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 32*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 35*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41*0Sstevel@tonic-gate * SUCH DAMAGE. 42*0Sstevel@tonic-gate */ 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate #include <port_before.h> 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #include <sys/types.h> 49*0Sstevel@tonic-gate #include <sys/socket.h> 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate #include <netinet/in.h> 52*0Sstevel@tonic-gate #include <arpa/nameser.h> 53*0Sstevel@tonic-gate #include <arpa/inet.h> 54*0Sstevel@tonic-gate #include <net/if.h> 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate #include <netdb.h> 57*0Sstevel@tonic-gate #include <resolv.h> 58*0Sstevel@tonic-gate #include <string.h> 59*0Sstevel@tonic-gate #include <stddef.h> 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate #include <port_after.h> 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* 64*0Sstevel@tonic-gate * Note that a_off will be dynamically adjusted so that to be consistent 65*0Sstevel@tonic-gate * with the definition of sockaddr_in{,6}. 66*0Sstevel@tonic-gate * The value presented below is just a guess. 67*0Sstevel@tonic-gate */ 68*0Sstevel@tonic-gate static struct afd { 69*0Sstevel@tonic-gate int a_af; 70*0Sstevel@tonic-gate int a_addrlen; 71*0Sstevel@tonic-gate size_t a_socklen; 72*0Sstevel@tonic-gate int a_off; 73*0Sstevel@tonic-gate } afdl [] = { 74*0Sstevel@tonic-gate /* first entry is linked last... */ 75*0Sstevel@tonic-gate {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in), 76*0Sstevel@tonic-gate offsetof(struct sockaddr_in, sin_addr)}, 77*0Sstevel@tonic-gate {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6), 78*0Sstevel@tonic-gate offsetof(struct sockaddr_in6, sin6_addr)}, 79*0Sstevel@tonic-gate {0, 0, 0, 0}, 80*0Sstevel@tonic-gate }; 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate struct sockinet { 83*0Sstevel@tonic-gate #ifdef HAVE_SA_LEN 84*0Sstevel@tonic-gate u_char si_len; 85*0Sstevel@tonic-gate #endif 86*0Sstevel@tonic-gate u_char si_family; 87*0Sstevel@tonic-gate u_short si_port; 88*0Sstevel@tonic-gate }; 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate static int ip6_parsenumeric __P((const struct sockaddr *, const char *, char *, 91*0Sstevel@tonic-gate size_t, int)); 92*0Sstevel@tonic-gate #ifdef HAVE_SIN6_SCOPE_ID 93*0Sstevel@tonic-gate static int ip6_sa2str __P((const struct sockaddr_in6 *, char *, size_t, int)); 94*0Sstevel@tonic-gate #endif 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate int 97*0Sstevel@tonic-gate getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) 98*0Sstevel@tonic-gate const struct sockaddr *sa; 99*0Sstevel@tonic-gate #ifdef ORIGINAL_ISC_CODE 100*0Sstevel@tonic-gate size_t salen; 101*0Sstevel@tonic-gate #else 102*0Sstevel@tonic-gate socklen_t salen; 103*0Sstevel@tonic-gate #endif 104*0Sstevel@tonic-gate char *host; 105*0Sstevel@tonic-gate #ifdef ORIGINAL_ISC_CODE 106*0Sstevel@tonic-gate size_t hostlen; 107*0Sstevel@tonic-gate #else 108*0Sstevel@tonic-gate socklen_t hostlen; 109*0Sstevel@tonic-gate #endif 110*0Sstevel@tonic-gate char *serv; 111*0Sstevel@tonic-gate #ifdef ORIGINAL_ISC_CODE 112*0Sstevel@tonic-gate size_t servlen; 113*0Sstevel@tonic-gate #else 114*0Sstevel@tonic-gate socklen_t servlen; 115*0Sstevel@tonic-gate #endif 116*0Sstevel@tonic-gate int flags; 117*0Sstevel@tonic-gate { 118*0Sstevel@tonic-gate struct afd *afd; 119*0Sstevel@tonic-gate struct servent *sp; 120*0Sstevel@tonic-gate struct hostent *hp; 121*0Sstevel@tonic-gate u_short port; 122*0Sstevel@tonic-gate #ifdef HAVE_SA_LEN 123*0Sstevel@tonic-gate size_t len; 124*0Sstevel@tonic-gate #endif 125*0Sstevel@tonic-gate int family, i; 126*0Sstevel@tonic-gate const char *addr; 127*0Sstevel@tonic-gate char *p; 128*0Sstevel@tonic-gate char numserv[512]; 129*0Sstevel@tonic-gate char numaddr[512]; 130*0Sstevel@tonic-gate const struct sockaddr_in6 *sin6; 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate if (sa == NULL) 133*0Sstevel@tonic-gate return EAI_FAIL; 134*0Sstevel@tonic-gate 135*0Sstevel@tonic-gate #ifdef HAVE_SA_LEN 136*0Sstevel@tonic-gate len = sa->sa_len; 137*0Sstevel@tonic-gate if (len != salen) return EAI_FAIL; 138*0Sstevel@tonic-gate #endif 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate family = sa->sa_family; 141*0Sstevel@tonic-gate for (i = 0; afdl[i].a_af; i++) 142*0Sstevel@tonic-gate if (afdl[i].a_af == family) { 143*0Sstevel@tonic-gate afd = &afdl[i]; 144*0Sstevel@tonic-gate goto found; 145*0Sstevel@tonic-gate } 146*0Sstevel@tonic-gate return EAI_FAMILY; 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate found: 149*0Sstevel@tonic-gate if (salen != afd->a_socklen) return EAI_FAIL; 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate port = ((const struct sockinet *)sa)->si_port; /* network byte order */ 152*0Sstevel@tonic-gate addr = (const char *)sa + afd->a_off; 153*0Sstevel@tonic-gate 154*0Sstevel@tonic-gate if (serv == NULL || servlen == 0) { 155*0Sstevel@tonic-gate /* 156*0Sstevel@tonic-gate * rfc2553bis says that serv == NULL or servlen == 0 means that 157*0Sstevel@tonic-gate * the caller does not want the result. 158*0Sstevel@tonic-gate */ 159*0Sstevel@tonic-gate } else if (flags & NI_NUMERICSERV) { 160*0Sstevel@tonic-gate sprintf(numserv, "%d", ntohs(port)); 161*0Sstevel@tonic-gate if (strlen(numserv) > servlen) 162*0Sstevel@tonic-gate return EAI_MEMORY; 163*0Sstevel@tonic-gate strcpy(serv, numserv); 164*0Sstevel@tonic-gate } else { 165*0Sstevel@tonic-gate sp = getservbyport(port, (flags & NI_DGRAM) ? "udp" : "tcp"); 166*0Sstevel@tonic-gate if (sp) { 167*0Sstevel@tonic-gate if (strlen(sp->s_name) + 1 > servlen) 168*0Sstevel@tonic-gate return EAI_MEMORY; 169*0Sstevel@tonic-gate strcpy(serv, sp->s_name); 170*0Sstevel@tonic-gate } else 171*0Sstevel@tonic-gate return EAI_NONAME; 172*0Sstevel@tonic-gate } 173*0Sstevel@tonic-gate 174*0Sstevel@tonic-gate switch (sa->sa_family) { 175*0Sstevel@tonic-gate case AF_INET: 176*0Sstevel@tonic-gate if (ntohl(*(const u_long *)addr) >> IN_CLASSA_NSHIFT == 0) 177*0Sstevel@tonic-gate flags |= NI_NUMERICHOST; 178*0Sstevel@tonic-gate break; 179*0Sstevel@tonic-gate case AF_INET6: 180*0Sstevel@tonic-gate sin6 = (const struct sockaddr_in6 *)sa; 181*0Sstevel@tonic-gate switch (sin6->sin6_addr.s6_addr[0]) { 182*0Sstevel@tonic-gate case 0x00: 183*0Sstevel@tonic-gate if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 184*0Sstevel@tonic-gate ; 185*0Sstevel@tonic-gate else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 186*0Sstevel@tonic-gate ; 187*0Sstevel@tonic-gate else 188*0Sstevel@tonic-gate flags |= NI_NUMERICHOST; 189*0Sstevel@tonic-gate break; 190*0Sstevel@tonic-gate default: 191*0Sstevel@tonic-gate if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 192*0Sstevel@tonic-gate flags |= NI_NUMERICHOST; 193*0Sstevel@tonic-gate else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 194*0Sstevel@tonic-gate flags |= NI_NUMERICHOST; 195*0Sstevel@tonic-gate break; 196*0Sstevel@tonic-gate } 197*0Sstevel@tonic-gate break; 198*0Sstevel@tonic-gate } 199*0Sstevel@tonic-gate if (host == NULL || hostlen == 0) { 200*0Sstevel@tonic-gate /* 201*0Sstevel@tonic-gate * rfc2553bis says that host == NULL or hostlen == 0 means that 202*0Sstevel@tonic-gate * the caller does not want the result. 203*0Sstevel@tonic-gate */ 204*0Sstevel@tonic-gate } else if (flags & NI_NUMERICHOST) { 205*0Sstevel@tonic-gate goto numeric; 206*0Sstevel@tonic-gate } else { 207*0Sstevel@tonic-gate hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af); 208*0Sstevel@tonic-gate 209*0Sstevel@tonic-gate if (hp) { 210*0Sstevel@tonic-gate if (flags & NI_NOFQDN) { 211*0Sstevel@tonic-gate p = strchr(hp->h_name, '.'); 212*0Sstevel@tonic-gate if (p) *p = '\0'; 213*0Sstevel@tonic-gate } 214*0Sstevel@tonic-gate if (strlen(hp->h_name) + 1 > hostlen) 215*0Sstevel@tonic-gate return EAI_MEMORY; 216*0Sstevel@tonic-gate strcpy(host, hp->h_name); 217*0Sstevel@tonic-gate } else { 218*0Sstevel@tonic-gate if (flags & NI_NAMEREQD) 219*0Sstevel@tonic-gate return EAI_NONAME; 220*0Sstevel@tonic-gate numeric: 221*0Sstevel@tonic-gate switch(afd->a_af) { 222*0Sstevel@tonic-gate case AF_INET6: 223*0Sstevel@tonic-gate { 224*0Sstevel@tonic-gate int error; 225*0Sstevel@tonic-gate 226*0Sstevel@tonic-gate if ((error = ip6_parsenumeric(sa, addr, host, 227*0Sstevel@tonic-gate hostlen, 228*0Sstevel@tonic-gate flags)) != 0) 229*0Sstevel@tonic-gate return(error); 230*0Sstevel@tonic-gate break; 231*0Sstevel@tonic-gate } 232*0Sstevel@tonic-gate 233*0Sstevel@tonic-gate default: 234*0Sstevel@tonic-gate if (inet_ntop(afd->a_af, addr, numaddr, 235*0Sstevel@tonic-gate sizeof(numaddr)) == NULL) 236*0Sstevel@tonic-gate return EAI_NONAME; 237*0Sstevel@tonic-gate if (strlen(numaddr) + 1 > hostlen) 238*0Sstevel@tonic-gate return EAI_MEMORY; 239*0Sstevel@tonic-gate strcpy(host, numaddr); 240*0Sstevel@tonic-gate } 241*0Sstevel@tonic-gate } 242*0Sstevel@tonic-gate } 243*0Sstevel@tonic-gate return(0); 244*0Sstevel@tonic-gate } 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate static int 247*0Sstevel@tonic-gate ip6_parsenumeric(const struct sockaddr *sa, const char *addr, char *host, 248*0Sstevel@tonic-gate size_t hostlen, int flags) 249*0Sstevel@tonic-gate { 250*0Sstevel@tonic-gate size_t numaddrlen; 251*0Sstevel@tonic-gate char numaddr[512]; 252*0Sstevel@tonic-gate 253*0Sstevel@tonic-gate #ifndef HAVE_SIN6_SCOPE_ID 254*0Sstevel@tonic-gate UNUSED(sa); 255*0Sstevel@tonic-gate UNUSED(flags); 256*0Sstevel@tonic-gate #endif 257*0Sstevel@tonic-gate 258*0Sstevel@tonic-gate if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) 259*0Sstevel@tonic-gate == NULL) 260*0Sstevel@tonic-gate return EAI_SYSTEM; 261*0Sstevel@tonic-gate 262*0Sstevel@tonic-gate numaddrlen = strlen(numaddr); 263*0Sstevel@tonic-gate if (numaddrlen + 1 > hostlen) /* don't forget terminator */ 264*0Sstevel@tonic-gate return EAI_MEMORY; 265*0Sstevel@tonic-gate strcpy(host, numaddr); 266*0Sstevel@tonic-gate 267*0Sstevel@tonic-gate #ifdef HAVE_SIN6_SCOPE_ID 268*0Sstevel@tonic-gate if (((const struct sockaddr_in6 *)sa)->sin6_scope_id) { 269*0Sstevel@tonic-gate char scopebuf[MAXHOSTNAMELEN]; /* XXX */ 270*0Sstevel@tonic-gate int scopelen; 271*0Sstevel@tonic-gate 272*0Sstevel@tonic-gate /* ip6_sa2str never fails */ 273*0Sstevel@tonic-gate scopelen = ip6_sa2str((const struct sockaddr_in6 *)sa, 274*0Sstevel@tonic-gate scopebuf, sizeof(scopebuf), flags); 275*0Sstevel@tonic-gate 276*0Sstevel@tonic-gate if (scopelen + 1 + numaddrlen + 1 > hostlen) 277*0Sstevel@tonic-gate return EAI_MEMORY; 278*0Sstevel@tonic-gate 279*0Sstevel@tonic-gate /* construct <numeric-addr><delim><scopeid> */ 280*0Sstevel@tonic-gate memcpy(host + numaddrlen + 1, scopebuf, 281*0Sstevel@tonic-gate scopelen); 282*0Sstevel@tonic-gate host[numaddrlen] = SCOPE_DELIMITER; 283*0Sstevel@tonic-gate host[numaddrlen + 1 + scopelen] = '\0'; 284*0Sstevel@tonic-gate } 285*0Sstevel@tonic-gate #endif 286*0Sstevel@tonic-gate 287*0Sstevel@tonic-gate return 0; 288*0Sstevel@tonic-gate } 289*0Sstevel@tonic-gate 290*0Sstevel@tonic-gate #ifdef HAVE_SIN6_SCOPE_ID 291*0Sstevel@tonic-gate /* ARGSUSED */ 292*0Sstevel@tonic-gate static int 293*0Sstevel@tonic-gate ip6_sa2str(const struct sockaddr_in6 *sa6, char *buf, 294*0Sstevel@tonic-gate size_t bufsiz, int flags) 295*0Sstevel@tonic-gate { 296*0Sstevel@tonic-gate #ifdef USE_IFNAMELINKID 297*0Sstevel@tonic-gate unsigned int ifindex = (unsigned int)sa6->sin6_scope_id; 298*0Sstevel@tonic-gate const struct in6_addr *a6 = &sa6->sin6_addr; 299*0Sstevel@tonic-gate #endif 300*0Sstevel@tonic-gate char tmp[64]; 301*0Sstevel@tonic-gate 302*0Sstevel@tonic-gate #ifdef NI_NUMERICSCOPE 303*0Sstevel@tonic-gate if (flags & NI_NUMERICSCOPE) { 304*0Sstevel@tonic-gate sprintf(tmp, "%u", sa6->sin6_scope_id); 305*0Sstevel@tonic-gate if (bufsiz != 0) { 306*0Sstevel@tonic-gate strncpy(buf, tmp, bufsiz - 1); 307*0Sstevel@tonic-gate buf[bufsiz - 1] = '\0'; 308*0Sstevel@tonic-gate } 309*0Sstevel@tonic-gate return(strlen(tmp)); 310*0Sstevel@tonic-gate } 311*0Sstevel@tonic-gate #endif 312*0Sstevel@tonic-gate 313*0Sstevel@tonic-gate #ifdef USE_IFNAMELINKID 314*0Sstevel@tonic-gate /* 315*0Sstevel@tonic-gate * For a link-local address, convert the index to an interface 316*0Sstevel@tonic-gate * name, assuming a one-to-one mapping between links and interfaces. 317*0Sstevel@tonic-gate * Note, however, that this assumption is stronger than the 318*0Sstevel@tonic-gate * specification of the scoped address architecture; the 319*0Sstevel@tonic-gate * specficication says that more than one interfaces can belong to 320*0Sstevel@tonic-gate * a single link. 321*0Sstevel@tonic-gate */ 322*0Sstevel@tonic-gate 323*0Sstevel@tonic-gate /* if_indextoname() does not take buffer size. not a good api... */ 324*0Sstevel@tonic-gate if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6)) && 325*0Sstevel@tonic-gate bufsiz >= IF_NAMESIZE) { 326*0Sstevel@tonic-gate char *p = if_indextoname(ifindex, buf); 327*0Sstevel@tonic-gate if (p) { 328*0Sstevel@tonic-gate return(strlen(p)); 329*0Sstevel@tonic-gate } 330*0Sstevel@tonic-gate } 331*0Sstevel@tonic-gate #endif 332*0Sstevel@tonic-gate 333*0Sstevel@tonic-gate /* last resort */ 334*0Sstevel@tonic-gate sprintf(tmp, "%u", sa6->sin6_scope_id); 335*0Sstevel@tonic-gate if (bufsiz != 0) { 336*0Sstevel@tonic-gate strncpy(buf, tmp, bufsiz - 1); 337*0Sstevel@tonic-gate buf[bufsiz - 1] = '\0'; 338*0Sstevel@tonic-gate } 339*0Sstevel@tonic-gate return(strlen(tmp)); 340*0Sstevel@tonic-gate } 341*0Sstevel@tonic-gate #endif 342