/* * 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 * GAI_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 GAI_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 GAI_ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN GAI_ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * "#ifdef FAITH" part is local hack for supporting IPv4-v6 translator. * * Issues to be discussed: * - Thread safe-ness must be checked. * - Return values. There are nonstandard return values defined and used * in the source code. This is because RFC2133 is silent about which error * code must be returned for which situation. * - PF_UNSPEC case would be handled in getipnodebyname() with the AI_ALL flag. */ #if 0#include <sys/types.h>#include <sys/param.h>#include <sys/sysctl.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <arpa/nameser.h>#include <netdb.h>#include <resolv.h>#include <string.h>#include <stdlib.h>#include <stddef.h>#include <ctype.h>#include <unistd.h> #include "addrinfo.h"#endif #if defined(__KAME__) && defined(ENABLE_IPV6)# define FAITH#endif #define SUCCESS 0#define GAI_ANY 0#define YES 1#define NO 0 #ifdef FAITHstatic int translate = NO;static struct in6_addr faith_prefix = IN6ADDR_GAI_ANY_INIT;#endif static const char in_addrany[] = { 0, 0, 0, 0 };static const char in6_addrany[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};static const char in_loopback[] = { 127, 0, 0, 1 }; static const char in6_loopback[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}; struct sockinet { u_char si_len; u_char si_family; u_short si_port;}; static struct gai_afd { int a_af; int a_addrlen; int a_socklen; int a_off; const char *a_addrany; const char *a_loopback; } gai_afdl [] = {#ifdef ENABLE_IPV6#define N_INET6 0 {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6), offsetof(struct sockaddr_in6, sin6_addr), in6_addrany, in6_loopback},#define N_INET 1#else#define N_INET 0#endif {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in), offsetof(struct sockaddr_in, sin_addr), in_addrany, in_loopback}, {0, 0, 0, 0, NULL, NULL},}; #ifdef ENABLE_IPV6#define PTON_MAX 16#else#define PTON_MAX 4#endif #ifndef IN_MULTICAST#define IN_MULTICAST(i) (((i) & 0xf0000000U) == 0xe0000000U)#endif #ifndef IN_EXPERIMENTAL#define IN_EXPERIMENTAL(i) (((i) & 0xe0000000U) == 0xe0000000U)#endif #ifndef IN_LOOPBACKNET#define IN_LOOPBACKNET 127#endif static int get_name Py_PROTO((const char *, struct gai_afd *, struct addrinfo **, char *, struct addrinfo *, int));static int get_addr Py_PROTO((const char *, int, struct addrinfo **, struct addrinfo *, int));static int str_isnumber Py_PROTO((const char *)); static char *ai_errlist[] = { "success.", "address family for hostname not supported.", /* EAI_ADDRFAMILY */ "temporary failure in name resolution.", /* EAI_AGAIN */ "invalid value for ai_flags.", /* EAI_BADFLAGS */ "non-recoverable failure in name resolution.", /* EAI_FAIL */ "ai_family not supported.", /* EAI_FAMILY */ "memory allocation failure.", /* EAI_MEMORY */ "no address associated with hostname.", /* EAI_NODATA */ "hostname nor servname provided, or not known.",/* EAI_NONAME */ "servname not supported for ai_socktype.", /* EAI_SERVICE */ "ai_socktype not supported.", /* EAI_SOCKTYPE */ "system error returned in errno.", /* EAI_SYSTEM */ "invalid value for hints.", /* EAI_BADHINTS */ "resolved protocol is unknown.", /* EAI_PROTOCOL */ "unknown error.", /* EAI_MAX */}; #define GET_CANONNAME(ai, str) \if (pai->ai_flags & AI_CANONNAME) {\ if (((ai)->ai_canonname = (char *)malloc(strlen(str) + 1)) != NULL) {\ strcpy((ai)->ai_canonname, (str));\ } else {\ error = EAI_MEMORY;\ goto free;\ }\} #ifdef HAVE_SOCKADDR_SA_LEN#define GET_AI(ai, gai_afd, addr, port) {\ char *p;\ if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\ ((gai_afd)->a_socklen)))\ == NULL) goto free;\ memcpy(ai, pai, sizeof(struct addrinfo));\ (ai)->ai_addr = (struct sockaddr *)((ai) + 1);\ memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\ (ai)->ai_addr->sa_len = (ai)->ai_addrlen = (gai_afd)->a_socklen;\ (ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\ ((struct sockinet *)(ai)->ai_addr)->si_port = port;\ p = (char *)((ai)->ai_addr);\ memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\}#else#define GET_AI(ai, gai_afd, addr, port) {\ char *p;\ if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\ ((gai_afd)->a_socklen)))\ == NULL) goto free;\ memcpy(ai, pai, sizeof(struct addrinfo));\ (ai)->ai_addr = (struct sockaddr *)((ai) + 1);\ memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\ (ai)->ai_addrlen = (gai_afd)->a_socklen;\ (ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\ ((struct sockinet *)(ai)->ai_addr)->si_port = port;\ p = (char *)((ai)->ai_addr);\ memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\}#endif #define ERR(err) { error = (err); goto bad; } char *gai_strerror(int ecode){ if (ecode < 0 || ecode > EAI_MAX) ecode = EAI_MAX; return ai_errlist[ecode];} voidfreeaddrinfo(struct addrinfo *ai){ struct addrinfo *next; do { next = ai->ai_next; if (ai->ai_canonname) free(ai->ai_canonname); /* no need to free(ai->ai_addr) */ free(ai); } while ((ai = next) != NULL);} static intstr_isnumber(const char *p){ unsigned char *q = (unsigned char *)p; while (*q) { if (! isdigit(*q)) return NO; q++; } return YES;} intgetaddrinfo(const char*hostname, const char*servname, const struct addrinfo *hints, struct addrinfo **res){ struct addrinfo sentinel; struct addrinfo *top = NULL; struct addrinfo *cur; int i, error = 0; char pton[PTON_MAX]; struct addrinfo ai; struct addrinfo *pai; u_short port; #ifdef FAITH static int firsttime = 1; if (firsttime) { /* translator hack */ { char *q = getenv("GAI"); if (q && inet_pton(AF_INET6, q, &faith_prefix) == 1) translate = YES; } firsttime = 0; }#endif /* initialize file static vars */ sentinel.ai_next = NULL; cur = &sentinel; pai = &ai; pai->ai_flags = 0; pai->ai_family = PF_UNSPEC; pai->ai_socktype = GAI_ANY; pai->ai_protocol = GAI_ANY; pai->ai_addrlen = 0; pai->ai_canonname = NULL; pai->ai_addr = NULL; pai->ai_next = NULL; port = GAI_ANY; if (hostname == NULL && servname == NULL) return EAI_NONAME; if (hints) { /* error check for hints */ if (hints->ai_addrlen || hints->ai_canonname || hints->ai_addr || hints->ai_next) ERR(EAI_BADHINTS); /* xxx */ if (hints->ai_flags & ~AI_MASK) ERR(EAI_BADFLAGS); switch (hints->ai_family) { case PF_UNSPEC: case PF_INET:#ifdef ENABLE_IPV6 case PF_INET6:#endif break; default: ERR(EAI_FAMILY); } memcpy(pai, hints, sizeof(*pai)); switch (pai->ai_socktype) { case GAI_ANY: switch (pai->ai_protocol) { case GAI_ANY: break; case IPPROTO_UDP: pai->ai_socktype = SOCK_DGRAM; break; case IPPROTO_TCP: pai->ai_socktype = SOCK_STREAM; break; default: pai->ai_socktype = SOCK_RAW; break; } break; case SOCK_RAW: break; case SOCK_DGRAM: if (pai->ai_protocol != IPPROTO_UDP && pai->ai_protocol != GAI_ANY) ERR(EAI_BADHINTS); /*xxx*/ pai->ai_protocol = IPPROTO_UDP; break; case SOCK_STREAM: if (pai->ai_protocol != IPPROTO_TCP && pai->ai_protocol != GAI_ANY) ERR(EAI_BADHINTS); /*xxx*/ pai->ai_protocol = IPPROTO_TCP; break; default: ERR(EAI_SOCKTYPE); /* unreachable */ } } /* * service port */ if (servname) { if (str_isnumber(servname)) { if (pai->ai_socktype == GAI_ANY) { /* caller accept *GAI_ANY* socktype */ pai->ai_socktype = SOCK_DGRAM; pai->ai_protocol = IPPROTO_UDP; } port = htons((u_short)atoi(servname)); } else { struct servent *sp; char *proto; proto = NULL; switch (pai->ai_socktype) { case GAI_ANY: proto = NULL; break; case SOCK_DGRAM: proto = "udp"; break; case SOCK_STREAM: proto = "tcp"; break; default: fprintf(stderr, "panic!\n"); break; } if ((sp = getservbyname(servname, proto)) == NULL) ERR(EAI_SERVICE); port = sp->s_port; if (pai->ai_socktype == GAI_ANY) { if (strcmp(sp->s_proto, "udp") == 0) { pai->ai_socktype = SOCK_DGRAM; pai->ai_protocol = IPPROTO_UDP; } else if (strcmp(sp->s_proto, "tcp") == 0) { pai->ai_socktype = SOCK_STREAM; pai->ai_protocol = IPPROTO_TCP; } else ERR(EAI_PROTOCOL); /*xxx*/ } } } /* * hostname == NULL. * passive socket -> anyaddr (0.0.0.0 or ::) * non-passive socket -> localhost (127.0.0.1 or ::1) */ if (hostname == NULL) { struct gai_afd *gai_afd; for (gai_afd = &gai_afdl[0]; gai_afd->a_af; gai_afd++) { if (!(pai->ai_family == PF_UNSPEC || pai->ai_family == gai_afd->a_af)) { continue; } if (pai->ai_flags & AI_PASSIVE) { GET_AI(cur->ai_next, gai_afd, gai_afd->a_addrany, port); /* xxx meaningless? * GET_CANONNAME(cur->ai_next, "anyaddr"); */ } else { GET_AI(cur->ai_next, gai_afd, gai_afd->a_loopback, port); /* xxx meaningless? * GET_CANONNAME(cur->ai_next, "localhost"); */ } cur = cur->ai_next; } top = sentinel.ai_next; if (top) goto good; else ERR(EAI_FAMILY); } /* hostname as numeric name */ for (i = 0; gai_afdl[i].a_af; i++) { if (inet_pton(gai_afdl[i].a_af, hostname, pton)) { u_long v4a;#ifdef ENABLE_IPV6 u_char pfx;#endif switch (gai_afdl[i].a_af) { case AF_INET: v4a = ((struct in_addr *)pton)->s_addr; v4a = ntohl(v4a); if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a)) pai->ai_flags &= ~AI_CANONNAME; v4a >>= IN_CLASSA_NSHIFT; if (v4a == 0 || v4a == IN_LOOPBACKNET) pai->ai_flags &= ~AI_CANONNAME; break;#ifdef ENABLE_IPV6 case AF_INET6: pfx = ((struct in6_addr *)pton)->s6_addr8[0]; if (pfx == 0 || pfx == 0xfe || pfx == 0xff) pai->ai_flags &= ~AI_CANONNAME; break;#endif } if (pai->ai_family == gai_afdl[i].a_af || pai->ai_family == PF_UNSPEC) { if (! (pai->ai_flags & AI_CANONNAME)) { GET_AI(top, &gai_afdl[i], pton, port); goto good; } /* * if AI_CANONNAME and if reverse lookup * fail, return ai anyway to pacify * calling application. * * XXX getaddrinfo() is a name->address * translation function, and it looks strange * that we do addr->name translation here. */ get_name(pton, &gai_afdl[i], &top, pton, pai, port); goto good; } else ERR(EAI_FAMILY); /*xxx*/ } } if (pai->ai_flags & AI_NUMERICHOST) ERR(EAI_NONAME); /* hostname as alphabetical name */ error = get_addr(hostname, pai->ai_family, &top, pai, port); if (error == 0) { if (top) { good: *res = top; return SUCCESS; } else error = EAI_FAIL; } free: if (top) freeaddrinfo(top); bad: *res = NULL; return error;} static intget_name(addr, gai_afd, res, numaddr, pai, port0) const char *addr; struct gai_afd *gai_afd; struct addrinfo **res; char *numaddr; struct addrinfo *pai; int port0;{ u_short port = port0 & 0xffff; struct hostent *hp; struct addrinfo *cur; int error = 0;#ifdef ENABLE_IPV6 int h_error;#endif #ifdef ENABLE_IPV6Lines 1–500 of 638. 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/* * 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 * GAI_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 GAI_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 GAI_ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN GAI_ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * "#ifdef FAITH" part is local hack for supporting IPv4-v6 translator. * * Issues to be discussed: * - Thread safe-ness must be checked. * - Return values. There are nonstandard return values defined and used * in the source code. This is because RFC2133 is silent about which error * code must be returned for which situation. * - PF_UNSPEC case would be handled in getipnodebyname() with the AI_ALL flag. */ #if 0 #include <sys/types.h> #include <sys/param.h> #include <sys/sysctl.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <arpa/nameser.h> #include <netdb.h> #include <resolv.h> #include <string.h> #include <stdlib.h> #include <stddef.h> #include <ctype.h> #include <unistd.h> #include "addrinfo.h" #endif #if defined(__KAME__) && defined(ENABLE_IPV6) # define FAITH #endif #define SUCCESS 0 #define GAI_ANY 0 #define YES 1 #define NO 0 #ifdef FAITH static int translate = NO; static struct in6_addr faith_prefix = IN6ADDR_GAI_ANY_INIT; #endif static const char in_addrany[] = { 0, 0, 0, 0 }; static const char in6_addrany[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static const char in_loopback[] = { 127, 0, 0, 1 }; static const char in6_loopback[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }; struct sockinet { u_char si_len; u_char si_family; u_short si_port; }; static struct gai_afd { int a_af; int a_addrlen; int a_socklen; int a_off; const char *a_addrany; const char *a_loopback; } gai_afdl [] = { #ifdef ENABLE_IPV6 #define N_INET6 0 {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6), offsetof(struct sockaddr_in6, sin6_addr), in6_addrany, in6_loopback}, #define N_INET 1 #else #define N_INET 0 #endif {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in), offsetof(struct sockaddr_in, sin_addr), in_addrany, in_loopback}, {0, 0, 0, 0, NULL, NULL}, }; #ifdef ENABLE_IPV6 #define PTON_MAX 16 #else #define PTON_MAX 4 #endif #ifndef IN_MULTICAST #define IN_MULTICAST(i) (((i) & 0xf0000000U) == 0xe0000000U) #endif #ifndef IN_EXPERIMENTAL #define IN_EXPERIMENTAL(i) (((i) & 0xe0000000U) == 0xe0000000U) #endif #ifndef IN_LOOPBACKNET #define IN_LOOPBACKNET 127 #endif static int get_name Py_PROTO((const char *, struct gai_afd *, struct addrinfo **, char *, struct addrinfo *, int)); static int get_addr Py_PROTO((const char *, int, struct addrinfo **, struct addrinfo *, int)); static int str_isnumber Py_PROTO((const char *)); static char *ai_errlist[] = { "success.", "address family for hostname not supported.", /* EAI_ADDRFAMILY */ "temporary failure in name resolution.", /* EAI_AGAIN */ "invalid value for ai_flags.", /* EAI_BADFLAGS */ "non-recoverable failure in name resolution.", /* EAI_FAIL */ "ai_family not supported.", /* EAI_FAMILY */ "memory allocation failure.", /* EAI_MEMORY */ "no address associated with hostname.", /* EAI_NODATA */ "hostname nor servname provided, or not known.",/* EAI_NONAME */ "servname not supported for ai_socktype.", /* EAI_SERVICE */ "ai_socktype not supported.", /* EAI_SOCKTYPE */ "system error returned in errno.", /* EAI_SYSTEM */ "invalid value for hints.", /* EAI_BADHINTS */ "resolved protocol is unknown.", /* EAI_PROTOCOL */ "unknown error.", /* EAI_MAX */ }; #define GET_CANONNAME(ai, str) \ if (pai->ai_flags & AI_CANONNAME) {\ if (((ai)->ai_canonname = (char *)malloc(strlen(str) + 1)) != NULL) {\ strcpy((ai)->ai_canonname, (str));\ } else {\ error = EAI_MEMORY;\ goto free;\ }\ } #ifdef HAVE_SOCKADDR_SA_LEN #define GET_AI(ai, gai_afd, addr, port) {\ char *p;\ if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\ ((gai_afd)->a_socklen)))\ == NULL) goto free;\ memcpy(ai, pai, sizeof(struct addrinfo));\ (ai)->ai_addr = (struct sockaddr *)((ai) + 1);\ memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\ (ai)->ai_addr->sa_len = (ai)->ai_addrlen = (gai_afd)->a_socklen;\ (ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\ ((struct sockinet *)(ai)->ai_addr)->si_port = port;\ p = (char *)((ai)->ai_addr);\ memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\ } #else #define GET_AI(ai, gai_afd, addr, port) {\ char *p;\ if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\ ((gai_afd)->a_socklen)))\ == NULL) goto free;\ memcpy(ai, pai, sizeof(struct addrinfo));\ (ai)->ai_addr = (struct sockaddr *)((ai) + 1);\ memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\ (ai)->ai_addrlen = (gai_afd)->a_socklen;\ (ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\ ((struct sockinet *)(ai)->ai_addr)->si_port = port;\ p = (char *)((ai)->ai_addr);\ memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\ } #endif #define ERR(err) { error = (err); goto bad; } char * gai_strerror(int ecode) { if (ecode < 0 || ecode > EAI_MAX) ecode = EAI_MAX; return ai_errlist[ecode]; } void freeaddrinfo(struct addrinfo *ai) { struct addrinfo *next; do { next = ai->ai_next; if (ai->ai_canonname) free(ai->ai_canonname); /* no need to free(ai->ai_addr) */ free(ai); } while ((ai = next) != NULL); } static int str_isnumber(const char *p) { unsigned char *q = (unsigned char *)p; while (*q) { if (! isdigit(*q)) return NO; q++; } return YES; } int getaddrinfo(const char*hostname, const char*servname, const struct addrinfo *hints, struct addrinfo **res) { struct addrinfo sentinel; struct addrinfo *top = NULL; struct addrinfo *cur; int i, error = 0; char pton[PTON_MAX]; struct addrinfo ai; struct addrinfo *pai; u_short port; #ifdef FAITH static int firsttime = 1; if (firsttime) { /* translator hack */ { char *q = getenv("GAI"); if (q && inet_pton(AF_INET6, q, &faith_prefix) == 1) translate = YES; } firsttime = 0; } #endif /* initialize file static vars */ sentinel.ai_next = NULL; cur = &sentinel; pai = &ai; pai->ai_flags = 0; pai->ai_family = PF_UNSPEC; pai->ai_socktype = GAI_ANY; pai->ai_protocol = GAI_ANY; pai->ai_addrlen = 0; pai->ai_canonname = NULL; pai->ai_addr = NULL; pai->ai_next = NULL; port = GAI_ANY; if (hostname == NULL && servname == NULL) return EAI_NONAME; if (hints) { /* error check for hints */ if (hints->ai_addrlen || hints->ai_canonname || hints->ai_addr || hints->ai_next) ERR(EAI_BADHINTS); /* xxx */ if (hints->ai_flags & ~AI_MASK) ERR(EAI_BADFLAGS); switch (hints->ai_family) { case PF_UNSPEC: case PF_INET: #ifdef ENABLE_IPV6 case PF_INET6: #endif break; default: ERR(EAI_FAMILY); } memcpy(pai, hints, sizeof(*pai)); switch (pai->ai_socktype) { case GAI_ANY: switch (pai->ai_protocol) { case GAI_ANY: break; case IPPROTO_UDP: pai->ai_socktype = SOCK_DGRAM; break; case IPPROTO_TCP: pai->ai_socktype = SOCK_STREAM; break; default: pai->ai_socktype = SOCK_RAW; break; } break; case SOCK_RAW: break; case SOCK_DGRAM: if (pai->ai_protocol != IPPROTO_UDP && pai->ai_protocol != GAI_ANY) ERR(EAI_BADHINTS); /*xxx*/ pai->ai_protocol = IPPROTO_UDP; break; case SOCK_STREAM: if (pai->ai_protocol != IPPROTO_TCP && pai->ai_protocol != GAI_ANY) ERR(EAI_BADHINTS); /*xxx*/ pai->ai_protocol = IPPROTO_TCP; break; default: ERR(EAI_SOCKTYPE); /* unreachable */ } } /* * service port */ if (servname) { if (str_isnumber(servname)) { if (pai->ai_socktype == GAI_ANY) { /* caller accept *GAI_ANY* socktype */ pai->ai_socktype = SOCK_DGRAM; pai->ai_protocol = IPPROTO_UDP; } port = htons((u_short)atoi(servname)); } else { struct servent *sp; char *proto; proto = NULL; switch (pai->ai_socktype) { case GAI_ANY: proto = NULL; break; case SOCK_DGRAM: proto = "udp"; break; case SOCK_STREAM: proto = "tcp"; break; default: fprintf(stderr, "panic!\n"); break; } if ((sp = getservbyname(servname, proto)) == NULL) ERR(EAI_SERVICE); port = sp->s_port; if (pai->ai_socktype == GAI_ANY) { if (strcmp(sp->s_proto, "udp") == 0) { pai->ai_socktype = SOCK_DGRAM; pai->ai_protocol = IPPROTO_UDP; } else if (strcmp(sp->s_proto, "tcp") == 0) { pai->ai_socktype = SOCK_STREAM; pai->ai_protocol = IPPROTO_TCP; } else ERR(EAI_PROTOCOL); /*xxx*/ } } } /* * hostname == NULL. * passive socket -> anyaddr (0.0.0.0 or ::) * non-passive socket -> localhost (127.0.0.1 or ::1) */ if (hostname == NULL) { struct gai_afd *gai_afd; for (gai_afd = &gai_afdl[0]; gai_afd->a_af; gai_afd++) { if (!(pai->ai_family == PF_UNSPEC || pai->ai_family == gai_afd->a_af)) { continue; } if (pai->ai_flags & AI_PASSIVE) { GET_AI(cur->ai_next, gai_afd, gai_afd->a_addrany, port); /* xxx meaningless? * GET_CANONNAME(cur->ai_next, "anyaddr"); */ } else { GET_AI(cur->ai_next, gai_afd, gai_afd->a_loopback, port); /* xxx meaningless? * GET_CANONNAME(cur->ai_next, "localhost"); */ } cur = cur->ai_next; } top = sentinel.ai_next; if (top) goto good; else ERR(EAI_FAMILY); } /* hostname as numeric name */ for (i = 0; gai_afdl[i].a_af; i++) { if (inet_pton(gai_afdl[i].a_af, hostname, pton)) { u_long v4a; #ifdef ENABLE_IPV6 u_char pfx; #endif switch (gai_afdl[i].a_af) { case AF_INET: v4a = ((struct in_addr *)pton)->s_addr; v4a = ntohl(v4a); if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a)) pai->ai_flags &= ~AI_CANONNAME; v4a >>= IN_CLASSA_NSHIFT; if (v4a == 0 || v4a == IN_LOOPBACKNET) pai->ai_flags &= ~AI_CANONNAME; break; #ifdef ENABLE_IPV6 case AF_INET6: pfx = ((struct in6_addr *)pton)->s6_addr8[0]; if (pfx == 0 || pfx == 0xfe || pfx == 0xff) pai->ai_flags &= ~AI_CANONNAME; break; #endif } if (pai->ai_family == gai_afdl[i].a_af || pai->ai_family == PF_UNSPEC) { if (! (pai->ai_flags & AI_CANONNAME)) { GET_AI(top, &gai_afdl[i], pton, port); goto good; } /* * if AI_CANONNAME and if reverse lookup * fail, return ai anyway to pacify * calling application. * * XXX getaddrinfo() is a name->address * translation function, and it looks strange * that we do addr->name translation here. */ get_name(pton, &gai_afdl[i], &top, pton, pai, port); goto good; } else ERR(EAI_FAMILY); /*xxx*/ } } if (pai->ai_flags & AI_NUMERICHOST) ERR(EAI_NONAME); /* hostname as alphabetical name */ error = get_addr(hostname, pai->ai_family, &top, pai, port); if (error == 0) { if (top) { good: *res = top; return SUCCESS; } else error = EAI_FAIL; } free: if (top) freeaddrinfo(top); bad: *res = NULL; return error; } static int get_name(addr, gai_afd, res, numaddr, pai, port0) const char *addr; struct gai_afd *gai_afd; struct addrinfo **res; char *numaddr; struct addrinfo *pai; int port0; { u_short port = port0 & 0xffff; struct hostent *hp; struct addrinfo *cur; int error = 0; #ifdef ENABLE_IPV6 int h_error; #endif #ifdef ENABLE_IPV6