From 11b35b92e3195d230bef359f6a0679ae4414716b Mon Sep 17 00:00:00 2001 From: "Jeremy T. Bouse" Date: Sat, 15 Mar 2003 01:25:35 +0000 Subject: Spent the day working on backwards compatability using getaddrinfo() Moved getaddrinfo.? and gethostbyname.? from lib/ to plugins/ due to problems with compiling into the libnagiosplug.a as it required linking against socket libraries which are unneeded except for network based plugins. This code should hopefully happily work for all systems and has been tested prior to commit on Debian GNU/Linux, SPARC Solaris 7 and SPARC Solaris 9. git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@424 f882894a-f735-0410-b71e-b25c423dba1c --- plugins/gethostbyname.c | 228 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+) create mode 100644 plugins/gethostbyname.c (limited to 'plugins/gethostbyname.c') diff --git a/plugins/gethostbyname.c b/plugins/gethostbyname.c new file mode 100644 index 00000000..d151606d --- /dev/null +++ b/plugins/gethostbyname.c @@ -0,0 +1,228 @@ +/* + * This file is a ghastly hack because nobody can agree on + * gethostbyname_r()'s prototype. + * + * Copyright (C) 2001,2002 Brian Stafford + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#define _SVID_SOURCE 1 /* Need this to get gethostbyname_r() */ + +#include + +#include +#include +#include +#include + +#include "gethostbyname.h" + +#if HAVE_GETIPNODEBYNAME + +void +free_ghbnctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + if (ctx->hostent != NULL) + freehostent (ctx->hostent); +} + +struct hostent * +gethostbyname_ctx (const char *host, struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + memset (ctx, 0, sizeof (struct ghbnctx)); + ctx->hostent = getipnodebyname (host, AF_UNSPEC, AI_ADDRCONFIG, &ctx->h_err); + return ctx->hostent; +} + +int +h_error_ctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + return ctx->h_err; +} + +#elif HAVE_GETHOSTBYNAME_R == 6 + +void +free_ghbnctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + if (ctx->hostbuf != NULL) + free (ctx->hostbuf); +} + +struct hostent * +gethostbyname_ctx (const char *host, struct ghbnctx *ctx) +{ + struct hostent *hp; + char *tmp; + int err; + + assert (ctx != NULL); + + memset (ctx, 0, sizeof (struct ghbnctx)); + ctx->hostbuf_len = 2048; + if ((ctx->hostbuf = malloc (ctx->hostbuf_len)) == NULL) + { + errno = ENOMEM; + return NULL; + } + while ((err = gethostbyname_r (host, + &ctx->hostent, ctx->hostbuf, ctx->hostbuf_len, + &hp, &ctx->h_err)) == ERANGE) + { + ctx->hostbuf_len += 1024; + if ((tmp = realloc (ctx->hostbuf, ctx->hostbuf_len)) == NULL) + { + errno = ENOMEM; + return NULL; + } + ctx->hostbuf = tmp; + } + if (err != 0) + { + errno = err; + return NULL; + } + return hp; +} + +int +h_error_ctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + return ctx->h_err; +} + +#elif HAVE_GETHOSTBYNAME_R == 5 + +void +free_ghbnctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + if (ctx->hostbuf != NULL) + free (ctx->hostbuf); +} + +struct hostent * +gethostbyname_ctx (const char *host, struct ghbnctx *ctx) +{ + struct hostent *hp; + char *tmp; + + assert (ctx != NULL); + + memset (ctx, 0, sizeof (struct ghbnctx)); + ctx->hostbuf_len = 2048; + if ((ctx->hostbuf = malloc (ctx->hostbuf_len)) == NULL) + { + errno = ENOMEM; + return NULL; + } + while ((hp = gethostbyname_r (host, &ctx->hostent, + ctx->hostbuf, ctx->hostbuf_len, + &ctx->h_err)) == NULL && errno == ERANGE) + { + ctx->hostbuf_len += 1024; + if ((tmp = realloc (ctx->hostbuf, ctx->hostbuf_len)) == NULL) + { + errno = ENOMEM; + return NULL; + } + ctx->hostbuf = tmp; + } + return hp; +} + +int +h_error_ctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + return ctx->h_err; +} + +#elif HAVE_GETHOSTBYNAME_R == 3 + +void +free_ghbnctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + /* FIXME: does this need to do anything? */ +} + +struct hostent * +gethostbyname_ctx (const char *host, struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + if (!gethostbyname_r (host, &ctx->hostent, &ctx->hostent_data)) + { + ctx->h_err = h_errno; /* FIXME: is this correct? */ + return NULL; + } + return &ctx->hostent; +} + +int +h_error_ctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + return ctx->h_err; +} + +#else + +void +free_ghbnctx (struct ghbnctx *ctx __attribute__ ((unused))) +{ + assert (ctx != NULL); +} + +struct hostent * +gethostbyname_ctx (const char *host, struct ghbnctx *ctx) +{ + struct hostent *hp; + + hp = gethostbyname (host); + if (hp == NULL) + ctx->h_err = h_errno; + return hp; +} + +int +h_error_ctx (struct ghbnctx *ctx) +{ + assert (ctx != NULL); + + return ctx->h_err; +} + +#endif -- cgit v1.2.3-74-g34f1