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Diffstat (limited to 'contrib/idn/idnkit-1.0-src/tools/runidn/stub.c')
| -rw-r--r-- | contrib/idn/idnkit-1.0-src/tools/runidn/stub.c | 387 |
1 files changed, 387 insertions, 0 deletions
diff --git a/contrib/idn/idnkit-1.0-src/tools/runidn/stub.c b/contrib/idn/idnkit-1.0-src/tools/runidn/stub.c new file mode 100644 index 0000000..0ec1685 --- /dev/null +++ b/contrib/idn/idnkit-1.0-src/tools/runidn/stub.c @@ -0,0 +1,387 @@ +#ifndef lint +static char *rcsid = "$Id: stub.c,v 1.1.1.1 2003/06/04 00:27:13 marka Exp $"; +#endif + +/* + * Copyright (c) 2001 Japan Network Information Center. All rights reserved. + * + * By using this file, you agree to the terms and conditions set forth bellow. + * + * LICENSE TERMS AND CONDITIONS + * + * The following License Terms and Conditions apply, unless a different + * license is obtained from Japan Network Information Center ("JPNIC"), + * a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda, + * Chiyoda-ku, Tokyo 101-0047, Japan. + * + * 1. Use, Modification and Redistribution (including distribution of any + * modified or derived work) in source and/or binary forms is permitted + * under this License Terms and Conditions. + * + * 2. Redistribution of source code must retain the copyright notices as they + * appear in each source code file, this License Terms and Conditions. + * + * 3. Redistribution in binary form must reproduce the Copyright Notice, + * this License Terms and Conditions, in the documentation and/or other + * materials provided with the distribution. For the purposes of binary + * distribution the "Copyright Notice" refers to the following language: + * "Copyright (c) 2000-2002 Japan Network Information Center. All rights reserved." + * + * 4. The name of JPNIC may not be used to endorse or promote products + * derived from this Software without specific prior written approval of + * JPNIC. + * + * 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JPNIC BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + */ + +#include <config.h> + +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netdb.h> +#include <errno.h> +#ifdef HAVE_DLFCN_H +#include <dlfcn.h> +#endif + +#include <idn/logmacro.h> +#include <idn/debug.h> + +#include "stub.h" + +#ifndef RTLD_NEXT +typedef struct { + const char *name; + void *handle; +} shared_obj_t; + +static shared_obj_t shobj[] = { +#ifdef SOPATH_LIBC + { SOPATH_LIBC }, +#endif +#ifdef SOPATH_LIBNSL + { SOPATH_LIBNSL }, +#endif + { NULL }, +}; +#endif + +static void *shared_obj_findsym(void *handle, const char *name); +static void *shared_obj_findsymx(void *handle, const char *name); +static void *get_func_addr(const char *name); + +#ifndef RTLD_NEXT +static void * +shared_obj_open(const char *path) { +#ifdef HAVE_DLOPEN + return (dlopen(path, RTLD_LAZY)); +#endif + FATAL(("stub: no way to load shared object file\n")); + return (NULL); +} +#endif + +static void * +shared_obj_findsym(void *handle, const char *name) { + char namebuf[100]; + void *addr; + static int need_leading_underscore = -1; + + /* Prepend underscore. */ + namebuf[0] = '_'; + (void)strcpy(namebuf + 1, name); + name = namebuf; + + if (need_leading_underscore < 0) { + /* First try without one. */ + if ((addr = shared_obj_findsymx(handle, name + 1)) != NULL) { + need_leading_underscore = 0; + return (addr); + } + /* Then try with one. */ + if ((addr = shared_obj_findsymx(handle, name)) != NULL) { + need_leading_underscore = 1; + return (addr); + } + } else if (need_leading_underscore) { + return (shared_obj_findsymx(handle, name)); + } else { + return (shared_obj_findsymx(handle, name + 1)); + } + return (NULL); +} + +static void * +shared_obj_findsymx(void *handle, const char *name) { +#ifdef HAVE_DLSYM + return (dlsym(handle, name)); +#endif + /* logging */ + FATAL(("stub: no way to get symbol address\n")); + return (NULL); +} + +static void * +get_func_addr(const char *name) { +#ifdef RTLD_NEXT + void *addr = shared_obj_findsym(RTLD_NEXT, name); + + if (addr != NULL) { + TRACE(("stub: %s found in the subsequent objects\n", name)); + return (addr); + } +#else + int i; + + for (i = 0; shobj[i].name != NULL; i++) { + if (shobj[i].handle == NULL) { + TRACE(("stub: loading %s\n", shobj[i].name)); + shobj[i].handle = shared_obj_open(shobj[i].name); + } + if (shobj[i].handle != NULL) { + void *addr = shared_obj_findsym(shobj[i].handle, name); + if (addr != NULL) { + TRACE(("stub: %s found in %s\n", + name, shobj[i].name)); + return (addr); + } + } + } +#endif + TRACE(("stub: %s not found\n", name)); + return (NULL); +} + +#ifdef HAVE_GETHOSTBYNAME +struct hostent * +idn_stub_gethostbyname(const char *name) { + static struct hostent *(*fp)(const char *name); + + if (fp == NULL) + fp = get_func_addr("gethostbyname"); + if (fp != NULL) + return ((*fp)(name)); + return (NULL); +} +#endif + +#ifdef HAVE_GETHOSTBYNAME2 +struct hostent * +idn_stub_gethostbyname2(const char *name, int af) { + static struct hostent *(*fp)(const char *name, int af); + + if (fp == NULL) + fp = get_func_addr("gethostbyname2"); + if (fp != NULL) + return ((*fp)(name, af)); + return (NULL); +} +#endif + +#ifdef HAVE_GETHOSTBYADDR +struct hostent * +idn_stub_gethostbyaddr(GHBA_ADDR_T addr, GHBA_ADDRLEN_T len, int type) { + static struct hostent *(*fp)(GHBA_ADDR_T name, + GHBA_ADDRLEN_T len, int type); + + if (fp == NULL) + fp = get_func_addr("gethostbyaddr"); + if (fp != NULL) + return ((*fp)(addr, len, type)); + return (NULL); +} +#endif + +#ifdef GETHOST_R_GLIBC_FLAVOR + +#ifdef HAVE_GETHOSTBYNAME_R +int +idn_stub_gethostbyname_r(const char *name, struct hostent *result, + char *buffer, size_t buflen, + struct hostent **rp, int *errp) +{ + static int (*fp)(const char *name, struct hostent *result, + char *buffer, size_t buflen, + struct hostent **rp, int *errp); + + if (fp == NULL) + fp = get_func_addr("gethostbyname_r"); + if (fp != NULL) + return ((*fp)(name, result, buffer, buflen, rp, errp)); + return (ENOENT); /* ??? */ +} +#endif + +#ifdef HAVE_GETHOSTBYNAME2_R +int +idn_stub_gethostbyname2_r(const char *name, int af, struct hostent *result, + char *buffer, size_t buflen, + struct hostent **rp, int *errp) +{ + static int (*fp)(const char *name, int af, struct hostent *result, + char *buffer, size_t buflen, + struct hostent **rp, int *errp); + + if (fp == NULL) + fp = get_func_addr("gethostbyname2_r"); + if (fp != NULL) + return ((*fp)(name, af, result, buffer, buflen, rp, errp)); + return (ENOENT); /* ??? */ +} +#endif + +#ifdef HAVE_GETHOSTBYADDR_R +int +idn_stub_gethostbyaddr_r(GHBA_ADDR_T addr, GHBA_ADDRLEN_T len, int type, + struct hostent *result, char *buffer, + size_t buflen, struct hostent **rp, int *errp) +{ + static int (*fp)(GHBA_ADDR_T addr, GHBA_ADDRLEN_T len, int type, + struct hostent *result, char *buffer, + size_t buflen, struct hostent **rp, int *errp); + + if (fp == NULL) + fp = get_func_addr("gethostbyaddr_r"); + if (fp != NULL) + return ((*fp)(addr, len, type, result, + buffer, buflen, rp, errp)); + return (ENOENT); /* ??? */ +} +#endif + +#else /* GETHOST_R_GLIBC_FLAVOR */ + +#ifdef HAVE_GETHOSTBYNAME_R +struct hostent * +idn_stub_gethostbyname_r(const char *name, struct hostent *result, + char *buffer, int buflen, int *errp) +{ + static struct hostent *(*fp)(const char *name, struct hostent *result, + char *buffer, int buflen, int *errp); + + if (fp == NULL) + fp = get_func_addr("gethostbyname_r"); + if (fp != NULL) + return ((*fp)(name, result, buffer, buflen, errp)); + return (NULL); +} +#endif + +#ifdef HAVE_GETHOSTBYADDR_R +struct hostent * +idn_stub_gethostbyaddr_r(GHBA_ADDR_T addr, int len, int type, + struct hostent *result, char *buffer, + int buflen, int *errp) +{ + static struct hostent *(*fp)(GHBA_ADDR_T addr, int len, int type, + struct hostent *result, char *buffer, + int buflen, int *errp); + + if (fp == NULL) + fp = get_func_addr("gethostbyaddr_r"); + if (fp != NULL) + return ((*fp)(addr, len, type, result, buffer, buflen, errp)); + return (NULL); +} +#endif + +#endif /* GETHOST_R_GLIBC_FLAVOR */ + +#ifdef HAVE_GETIPNODEBYNAME +struct hostent * +idn_stub_getipnodebyname(const char *name, int af, int flags, int *errp) { + static struct hostent *(*fp)(const char *name, int af, int flags, + int *errp); + + if (fp == NULL) + fp = get_func_addr("getipnodebyname"); + if (fp != NULL) + return ((*fp)(name, af, flags, errp)); + return (NULL); +} +#endif + +#ifdef HAVE_GETIPNODEBYADDR +struct hostent * +idn_stub_getipnodebyaddr(const void *src, size_t len, int af, int *errp) { + static struct hostent *(*fp)(const void *src, size_t len, int af, + int *errp); + + if (fp == NULL) + fp = get_func_addr("getipnodebyaddr"); + if (fp != NULL) + return ((*fp)(src, len, af, errp)); + return (NULL); +} +#endif + +#ifdef HAVE_FREEHOSTENT +void +idn_stub_freehostent(struct hostent *hp) { + static void (*fp)(struct hostent *hp); + + if (fp == NULL) + fp = get_func_addr("freehostent"); + if (fp != NULL) + (*fp)(hp); +} +#endif + +#ifdef HAVE_GETADDRINFO +int +idn_stub_getaddrinfo(const char *nodename, const char *servname, + const struct addrinfo *hints, struct addrinfo **res) +{ + static int (*fp)(const char *nodename, const char *servname, + const struct addrinfo *hints, struct addrinfo **res); + + if (fp == NULL) + fp = get_func_addr("getaddrinfo"); + if (fp != NULL) + return ((*fp)(nodename, servname, hints, res)); + return (EAI_FAIL); +} +#endif + +#ifdef HAVE_FREEADDRINFO +void +idn_stub_freeaddrinfo(struct addrinfo *aip) { + static void (*fp)(struct addrinfo *aip); + + if (fp == NULL) + fp = get_func_addr("freeaddrinfo"); + if (fp != NULL) + (*fp)(aip); +} +#endif + +#ifdef HAVE_GETNAMEINFO +int +idn_stub_getnameinfo(const struct sockaddr *sa, GNI_SALEN_T salen, + char *host, GNI_HOSTLEN_T hostlen, + char *serv, GNI_SERVLEN_T servlen, GNI_FLAGS_T flags) { + static int (*fp)(const struct sockaddr *sa, GNI_SALEN_T salen, + char *host, GNI_HOSTLEN_T hostlen, + char *serv, GNI_SERVLEN_T servlen, + GNI_FLAGS_T flags); + + if (fp == NULL) + fp = get_func_addr("getnameinfo"); + if (fp != NULL) + return ((*fp)(sa, salen, host, hostlen, serv, servlen, flags)); + return (EAI_FAIL); +} +#endif |