diff options
Diffstat (limited to 'sysdeps/posix/getaddrinfo.c')
| -rw-r--r-- | sysdeps/posix/getaddrinfo.c | 289 |
1 files changed, 233 insertions, 56 deletions
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c index 90af24f..042e0a5 100644 --- a/sysdeps/posix/getaddrinfo.c +++ b/sysdeps/posix/getaddrinfo.c @@ -42,21 +42,43 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. /* This software is Copyright 1996 by Craig Metz, All Rights Reserved. */ +/* getaddrinfo() v1.13 */ + +/* To do what POSIX says, even when it's broken: */ +/* #define BROKEN_LIKE_POSIX 1 */ +#define LOCAL 1 +#define INET6 1 +#define HOSTTABLE 0 +#define RESOLVER 1 + #include <sys/types.h> -#include <sys/socket.h> #include <stdlib.h> +#include <unistd.h> +#include <sys/socket.h> +#if LOCAL +#include <stdio.h> +#include <string.h> +#include <sys/utsname.h> +#include <sys/un.h> +#endif /* LOCAL */ #include <netinet/in.h> -#ifdef INET6 -#include <netinet6/in6.h> -#endif /* INET6 */ #include <netdb.h> -#include <arpa/inet.h> -#include <string.h> +#include <errno.h> + +#ifndef AF_LOCAL +#define AF_LOCAL AF_UNIX +#endif /* AF_LOCAL */ +#ifndef PF_LOCAL +#define PF_LOCAL PF_UNIX +#endif /* PF_LOCAL */ +#ifndef UNIX_PATH_MAX +#define UNIX_PATH_MAX 108 +#endif /* UNIX_PATH_MAX */ #define GAIH_OKIFUNSPEC 0x0100 #define GAIH_EAI ~(GAIH_OKIFUNSPEC) -#ifdef HOSTTABLE +#if HOSTTABLE struct hostent *_hostname2addr_hosts(const char *name, int); struct hostent *_addr2hostname_hosts(const char *name, int, int); #endif /* HOSTTABLE */ @@ -66,7 +88,7 @@ static struct addrinfo nullreq = struct gaih_service { char *name; - unsigned long num; + int num; }; struct gaih_servtuple { @@ -86,18 +108,69 @@ struct gaih_addrtuple { char addr[16]; }; -static struct gaih_addrtuple nulladdr; - struct gaih_typeproto { int socktype; int protocol; - const char *name; + char *name; }; +#if LOCAL +static int gaih_local(const char *name, const struct gaih_service *service, + const struct addrinfo *req, struct addrinfo **pai) +{ + struct utsname utsname; + + if (name || (req->ai_flags & AI_CANONNAME)) + if (uname(&utsname)) + return -EAI_SYSTEM; + if (name) { + if (strcmp(name, "localhost") && strcmp(name, "local") && strcmp(name, "unix") && strcmp(name, utsname.nodename)) + return (GAIH_OKIFUNSPEC | -EAI_NONAME); + }; + + if (!(*pai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_un) + ((req->ai_flags & AI_CANONNAME) ? (strlen(utsname.nodename) + 1): 0)))) + return -EAI_MEMORY; + + (*pai)->ai_next = NULL; + (*pai)->ai_flags = req->ai_flags; + (*pai)->ai_family = AF_LOCAL; + (*pai)->ai_socktype = req->ai_socktype ? req->ai_socktype : SOCK_STREAM; + (*pai)->ai_protocol = req->ai_protocol; + (*pai)->ai_addrlen = sizeof(struct sockaddr_un); + (*pai)->ai_addr = (void *)(*pai) + sizeof(struct addrinfo); +#if SALEN + ((struct sockaddr_un *)(*pai)->ai_addr)->sun_len = sizeof(struct sockaddr_un); +#endif /* SALEN */ + ((struct sockaddr_un *)(*pai)->ai_addr)->sun_family = AF_LOCAL; + memset(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, 0, UNIX_PATH_MAX); + if (service) { + char *c; + if (c = strchr(service->name, '/')) { + if (strlen(service->name) >= sizeof(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path)) + return (GAIH_OKIFUNSPEC | -EAI_SERVICE); + strcpy(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, service->name); + } else { + if (strlen(P_tmpdir "/") + 1 + strlen(service->name) >= sizeof(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path)) + return (GAIH_OKIFUNSPEC | -EAI_SERVICE); + strcpy(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, P_tmpdir "/"); + strcat(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, service->name); + }; + } else { + if (!tmpnam(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path)) + return -EAI_SYSTEM; + }; + if (req->ai_flags & AI_CANONNAME) + strcpy((*pai)->ai_canonname = (char *)(*pai) + sizeof(struct addrinfo) + sizeof(struct sockaddr_un), utsname.nodename); + else + (*pai)->ai_canonname = NULL; + return 0; +}; +#endif /* LOCAL */ + static struct gaih_typeproto gaih_inet_typeproto[] = { { 0, 0, NULL }, - { SOCK_STREAM, IPPROTO_TCP, "tcp" }, - { SOCK_DGRAM, IPPROTO_UDP, "udp" }, + { SOCK_STREAM, IPPROTO_TCP, (char *)"tcp" }, + { SOCK_DGRAM, IPPROTO_UDP, (char *)"udp" }, { 0, 0, NULL } }; @@ -124,12 +197,12 @@ static int gaih_inet(const char *name, const struct gaih_service *service, { struct gaih_typeproto *tp = gaih_inet_typeproto; struct gaih_servtuple *st = &nullserv; - struct gaih_addrtuple *at = &nulladdr; + struct gaih_addrtuple *at = NULL; int i; if (req->ai_protocol || req->ai_socktype) { for (tp++; tp->name && - ((req->ai_socktype != tp->socktype) || !req->ai_socktype) && + ((req->ai_socktype != tp->socktype) || !req->ai_socktype) && ((req->ai_protocol != tp->protocol) || !req->ai_protocol); tp++); if (!tp->name) if (req->ai_socktype) @@ -139,7 +212,7 @@ static int gaih_inet(const char *name, const struct gaih_service *service, } if (service) { - if (service->name) { + if (service->num < 0) { if (tp->name) { if (i = gaih_inet_serv(service->name, tp, &st)) return i; @@ -182,18 +255,18 @@ static int gaih_inet(const char *name, const struct gaih_service *service, if (inet_pton(AF_INET, name, at->addr) > 0) at->family = AF_INET; -#ifdef INET6 +#if INET6 if (!at->family && (!req->ai_family || (req->ai_family == AF_INET6))) if (inet_pton(AF_INET6, name, at->addr) > 0) at->family = AF_INET6; #endif /* INET6 */ -#ifdef HOSTTABLE +#if HOSTTABLE if (!at->family) { struct hostent *h; struct gaih_addrtuple **pat = &at; -#ifdef INET6 +#if INET6 if (!req->ai_family || (req->ai_family == AF_INET6)) if (h = _hostname2addr_hosts(name, AF_INET6)) { for (i = 0; h->h_addr_list[i]; i++) { @@ -229,14 +302,35 @@ static int gaih_inet(const char *name, const struct gaih_service *service, } #endif /* HOSTTABLE */ -#ifdef RESOLVER +#if RESOLVER if (!at->family) { struct hostent *h; struct gaih_addrtuple **pat = &at; -#ifdef INET6 - if (!req->ai_family || (req->ai_family == AF_INET6)) - if (h = gethostbyname2(name, AF_INET6)) { +#if INET6 + if (!req->ai_family || (req->ai_family == AF_INET6)) { + int herrno; + int tmpbuflen = 1024; + struct hostent th; + char *tmpbuf = __alloca(tmpbuflen); + while (__gethostbyname2_r(name, AF_INET6, &th, tmpbuf, tmpbuflen, + &h, &herrno)) { + if (herrno == NETDB_INTERNAL) { + if (errno == ERANGE) { + /* Need more buffer */ + tmpbuflen *= 2; + tmpbuf = __alloca(tmpbuflen); + } else { + /* Bail out */ + __set_h_errno(herrno); + i = -EAI_SYSTEM; + goto ret; + } + } else { + break; + } + } + if (h) { for (i = 0; h->h_addr_list[i]; i++) { if (!*pat) { if (!(*pat = malloc(sizeof(struct gaih_addrtuple)))) { @@ -250,10 +344,32 @@ static int gaih_inet(const char *name, const struct gaih_service *service, pat = &((*pat)->next); } } + } #endif /* INET6 */ - if (!req->ai_family || (req->ai_family == AF_INET)) - if (h = gethostbyname2(name, AF_INET)) { + if (!req->ai_family || (req->ai_family == AF_INET)) { + int herrno; + struct hostent th; + int tmpbuflen = 1024; + char *tmpbuf = __alloca(tmpbuflen); + while (__gethostbyname2_r(name, AF_INET, &th, tmpbuf, tmpbuflen, + &h, &herrno)) { + if (herrno == NETDB_INTERNAL) { + if (errno == ERANGE) { + /* Need more buffer */ + tmpbuflen *= 2; + tmpbuf = __alloca(tmpbuflen); + } else { + /* Bail out */ + __set_h_errno(herrno); + i = -EAI_SYSTEM; + goto ret; + } + } else { + break; + } + } + if (h) { for (i = 0; h->h_addr_list[i]; i++) { if (!*pat) { if (!(*pat = malloc(sizeof(struct gaih_addrtuple)))) { @@ -267,20 +383,39 @@ static int gaih_inet(const char *name, const struct gaih_service *service, pat = &((*pat)->next); } } + } } #endif /* RESOLVER */ if (!at->family) return (GAIH_OKIFUNSPEC | -EAI_NONAME); } else { - memset(&nulladdr, 0, sizeof(nulladdr)); -#ifdef INET6 - if (!req->ai_family || (req->ai_family == AF_INET6)) - nulladdr.family = AF_INET6; - else + if (!(at = malloc(sizeof(struct gaih_addrtuple)))) { + i = -EAI_MEMORY; + goto ret; + }; + + memset(at, 0, sizeof(struct gaih_addrtuple)); + +#if INET6 + if (!(at->next = malloc(sizeof(struct gaih_addrtuple)))) { + i = -EAI_MEMORY; + goto ret; + }; + + at->family = AF_INET6; + + memset(at->next, 0, sizeof(struct gaih_addrtuple)); + at->next->family = AF_INET; +#else /* INET6 */ + at->family = AF_INET; #endif /* INET6 */ - nulladdr.family = AF_INET; - } + }; + + if (!pai) { + i = 0; + goto ret; + }; { const char *c = NULL; @@ -288,7 +423,7 @@ static int gaih_inet(const char *name, const struct gaih_service *service, struct gaih_addrtuple *at2 = at; int j; #ifndef MAXHOSTNAMELEN -# define MAXHOSTNAMELEN 128 +#define MAXHOSTNAMELEN 128 #endif /* MAXHOSTNAMELEN */ char buffer[MAXHOSTNAMELEN]; @@ -296,24 +431,44 @@ static int gaih_inet(const char *name, const struct gaih_service *service, if (req->ai_flags & AI_CANONNAME) { struct hostent *h = NULL; -#ifdef RESOLVER - h = gethostbyaddr(at2->addr, -#ifdef INET6 - (at2->family == AF_INET6) ? sizeof(struct in6_addr) : +#if RESOLVER + int herrno; + struct hostent th; + int tmpbuflen = 1024; + char *tmpbuf = __alloca(tmpbuflen); + while (__gethostbyaddr_r(at2->addr, +#if INET6 + (at2->family == AF_INET6) ? sizeof(struct in6_addr) : #endif /* INET6 */ - sizeof(struct in_addr), at2->family); + sizeof(struct in_addr), at2->family, + &th, tmpbuf, tmpbuflen, &h, &herrno)) { + if (herrno == NETDB_INTERNAL) { + if (errno == ERANGE) { + /* Need more buffer */ + tmpbuflen *= 2; + tmpbuf = __alloca(tmpbuflen); + } else { + /* Bail out */ + __set_h_errno(herrno); + i = -EAI_SYSTEM; + goto ret; + } + } else { + break; + } + } #endif /* RESOLVER */ -#ifdef HOSTTABLE +#if HOSTTABLE if (!h) h = _addr2hostname_hosts(at2->addr, -#ifdef INET6 - (at2->family == AF_INET6) ? sizeof(struct in6_addr) : +#if INET6 + (at2->family == AF_INET6) ? sizeof(struct in6_addr) : #endif /* INET6 */ sizeof(struct in_addr), at2->family); #endif /* HOSTTABLE */ if (!h) - c = inet_ntop(at2->family, at2->addr, buffer, sizeof(buffer)); + c = inet_ntop(at2->family, at2->addr, buffer, sizeof(buffer)); else c = h->h_name; @@ -326,7 +481,7 @@ static int gaih_inet(const char *name, const struct gaih_service *service, } else j = 0; -#ifdef INET6 +#if INET6 if (at2->family == AF_INET6) i = sizeof(struct sockaddr_in6); else @@ -351,7 +506,7 @@ static int gaih_inet(const char *name, const struct gaih_service *service, ((struct sockaddr_in *)(*pai)->ai_addr)->sin_family = at2->family; ((struct sockaddr_in *)(*pai)->ai_addr)->sin_port = st2->port; -#ifdef INET6 +#if INET6 if (at2->family == AF_INET6) { ((struct sockaddr_in6 *)(*pai)->ai_addr)->sin6_flowinfo = 0; memcpy(&((struct sockaddr_in6 *)(*pai)->ai_addr)->sin6_addr, at2->addr, sizeof(struct in6_addr)); @@ -361,7 +516,7 @@ static int gaih_inet(const char *name, const struct gaih_service *service, memcpy(&((struct sockaddr_in *)(*pai)->ai_addr)->sin_addr, at2->addr, sizeof(struct in_addr)); memset(((struct sockaddr_in *)(*pai)->ai_addr)->sin_zero, 0, sizeof(((struct sockaddr_in *)(*pai)->ai_addr)->sin_zero)); } - + if (c) { (*pai)->ai_canonname = (void *)(*pai) + sizeof(struct addrinfo) + i; strcpy((*pai)->ai_canonname, c); @@ -388,7 +543,7 @@ ret: st = st2; } } - if (at != &nulladdr) { + if (at) { struct gaih_addrtuple *at2 = at; while(at) { at2 = at->next; @@ -406,24 +561,34 @@ struct gaih { }; static struct gaih gaih[] = { -#ifdef INET6 +#if INET6 { PF_INET6, gaih_inet }, #endif /* INET6 */ { PF_INET, gaih_inet }, +#if LOCAL + { PF_LOCAL, gaih_local }, +#endif /* LOCAL */ { PF_UNSPEC, NULL } }; int getaddrinfo(const char *name, const char *service, const struct addrinfo *req, struct addrinfo **pai) { - int i = 0; - int j = 0; - struct addrinfo *p = NULL, **end = &p; + int i = 0, j = 0; + struct addrinfo *p = NULL, **end; struct gaih *g = gaih, *pg = NULL; struct gaih_service gaih_service, *pservice; + if (name && (name[0] == '*') && !name[1]) + name = NULL; + + if (service && (service[0] == '*') && !service[1]) + service = NULL; + +#if BROKEN_LIKE_POSIX if (!name && !service) return EAI_NONAME; +#endif /* BROKEN_LIKE_POSIX */ if (!req) req = &nullreq; @@ -437,26 +602,35 @@ int getaddrinfo(const char *name, const char *service, if (service && *service) { char *c; gaih_service.num = strtoul(gaih_service.name = (void *)service, &c, 10); - if (!*c) { - if (!req->ai_socktype) - return EAI_SERVICE; - gaih_service.name = NULL; + if (*c) { + gaih_service.num = -1; } +#if BROKEN_LIKE_POSIX + else + if (!req->ai_socktype) + return EAI_SERVICE; +#endif /* BROKEN_LIKE_POSIX */ pservice = &gaih_service; } else pservice = NULL; + if (pai) + end = &p; + else + end = NULL; + while(g->gaih) { if ((req->ai_family == g->family) || !req->ai_family) { j++; if (!((pg && (pg->gaih == g->gaih)))) { pg = g; - if ((i = g->gaih(name, pservice, req, end))) { + if (i = g->gaih(name, pservice, req, end)) { if (!req->ai_family && (i & GAIH_OKIFUNSPEC)) continue; goto gaih_err; } - while(*end) end = &((*end)->ai_next); + if (end) + while(*end) end = &((*end)->ai_next); } } g++; @@ -470,6 +644,9 @@ int getaddrinfo(const char *name, const char *service, return 0; } + if (!pai && !i) + return 0; + gaih_err: if (p) freeaddrinfo(p); |