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diff --git a/modules/mappers/mod_vhost_alias.c b/modules/mappers/mod_vhost_alias.c
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * mod_vhost_alias.c: support for dynamically configured mass virtual hosting
+ *
+ * Copyright (c) 1998-1999 Demon Internet Ltd.
+ *
+ * This software was submitted by Demon Internet to the Apache Software Foundation
+ * in May 1999. Future revisions and derivatives of this source code
+ * must acknowledge Demon Internet as the original contributor of
+ * this module. All other licensing and usage conditions are those
+ * of the Apache Software Foundation.
+ *
+ * Originally written by Tony Finch <fanf@demon.net> <dot@dotat.at>.
+ *
+ * Implementation ideas were taken from mod_alias.c. The overall
+ * concept is derived from the OVERRIDE_DOC_ROOT/OVERRIDE_CGIDIR
+ * patch to Apache 1.3b3 and a similar feature in Demon's thttpd,
+ * both written by James Grinter <jrg@blodwen.demon.co.uk>.
+ */
+
+#include "apr.h"
+#include "apr_strings.h"
+#include "ap_hooks.h"
+#include "apr_lib.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_request.h" /* for ap_hook_translate_name */
+
+
+module AP_MODULE_DECLARE_DATA vhost_alias_module;
+
+
+/*
+ * basic configuration things
+ * we abbreviate "mod_vhost_alias" to "mva" for shorter names
+ */
+
+typedef enum {
+ VHOST_ALIAS_UNSET, VHOST_ALIAS_NONE, VHOST_ALIAS_NAME, VHOST_ALIAS_IP
+} mva_mode_e;
+
+/*
+ * Per-server module config record.
+ */
+typedef struct mva_sconf_t {
+ const char *doc_root;
+ const char *cgi_root;
+ mva_mode_e doc_root_mode;
+ mva_mode_e cgi_root_mode;
+} mva_sconf_t;
+
+static void *mva_create_server_config(apr_pool_t *p, server_rec *s)
+{
+ mva_sconf_t *conf;
+
+ conf = (mva_sconf_t *) apr_pcalloc(p, sizeof(mva_sconf_t));
+ conf->doc_root = NULL;
+ conf->cgi_root = NULL;
+ conf->doc_root_mode = VHOST_ALIAS_UNSET;
+ conf->cgi_root_mode = VHOST_ALIAS_UNSET;
+ return conf;
+}
+
+static void *mva_merge_server_config(apr_pool_t *p, void *parentv, void *childv)
+{
+ mva_sconf_t *parent = (mva_sconf_t *) parentv;
+ mva_sconf_t *child = (mva_sconf_t *) childv;
+ mva_sconf_t *conf;
+
+ conf = (mva_sconf_t *) apr_pcalloc(p, sizeof(*conf));
+ if (child->doc_root_mode == VHOST_ALIAS_UNSET) {
+ conf->doc_root_mode = parent->doc_root_mode;
+ conf->doc_root = parent->doc_root;
+ }
+ else {
+ conf->doc_root_mode = child->doc_root_mode;
+ conf->doc_root = child->doc_root;
+ }
+ if (child->cgi_root_mode == VHOST_ALIAS_UNSET) {
+ conf->cgi_root_mode = parent->cgi_root_mode;
+ conf->cgi_root = parent->cgi_root;
+ }
+ else {
+ conf->cgi_root_mode = child->cgi_root_mode;
+ conf->cgi_root = child->cgi_root;
+ }
+ return conf;
+}
+
+
+/*
+ * These are just here to tell us what vhost_alias_set should do.
+ * We don't put anything into them; we just use the cell addresses.
+ */
+static int vhost_alias_set_doc_root_ip,
+ vhost_alias_set_cgi_root_ip,
+ vhost_alias_set_doc_root_name,
+ vhost_alias_set_cgi_root_name;
+
+static const char *vhost_alias_set(cmd_parms *cmd, void *dummy, const char *map)
+{
+ mva_sconf_t *conf;
+ mva_mode_e mode, *pmode;
+ const char **pmap;
+ const char *p;
+
+ conf = (mva_sconf_t *) ap_get_module_config(cmd->server->module_config,
+ &vhost_alias_module);
+ /* there ought to be a better way of doing this */
+ if (&vhost_alias_set_doc_root_ip == cmd->info) {
+ mode = VHOST_ALIAS_IP;
+ pmap = &conf->doc_root;
+ pmode = &conf->doc_root_mode;
+ }
+ else if (&vhost_alias_set_cgi_root_ip == cmd->info) {
+ mode = VHOST_ALIAS_IP;
+ pmap = &conf->cgi_root;
+ pmode = &conf->cgi_root_mode;
+ }
+ else if (&vhost_alias_set_doc_root_name == cmd->info) {
+ mode = VHOST_ALIAS_NAME;
+ pmap = &conf->doc_root;
+ pmode = &conf->doc_root_mode;
+ }
+ else if (&vhost_alias_set_cgi_root_name == cmd->info) {
+ mode = VHOST_ALIAS_NAME;
+ pmap = &conf->cgi_root;
+ pmode = &conf->cgi_root_mode;
+ }
+ else {
+ return "INTERNAL ERROR: unknown command info";
+ }
+
+ if (!ap_os_is_path_absolute(cmd->pool, map)) {
+ if (strcasecmp(map, "none")) {
+ return "format string must be an absolute path, or 'none'";
+ }
+ *pmap = NULL;
+ *pmode = VHOST_ALIAS_NONE;
+ return NULL;
+ }
+
+ /* sanity check */
+ p = map;
+ while (*p != '\0') {
+ if (*p++ != '%') {
+ continue;
+ }
+ /* we just found a '%' */
+ if (*p == 'p' || *p == '%') {
+ ++p;
+ continue;
+ }
+ /* optional dash */
+ if (*p == '-') {
+ ++p;
+ }
+ /* digit N */
+ if (apr_isdigit(*p)) {
+ ++p;
+ }
+ else {
+ return "syntax error in format string";
+ }
+ /* optional plus */
+ if (*p == '+') {
+ ++p;
+ }
+ /* do we end here? */
+ if (*p != '.') {
+ continue;
+ }
+ ++p;
+ /* optional dash */
+ if (*p == '-') {
+ ++p;
+ }
+ /* digit M */
+ if (apr_isdigit(*p)) {
+ ++p;
+ }
+ else {
+ return "syntax error in format string";
+ }
+ /* optional plus */
+ if (*p == '+') {
+ ++p;
+ }
+ }
+ *pmap = map;
+ *pmode = mode;
+ return NULL;
+}
+
+static const command_rec mva_commands[] =
+{
+ AP_INIT_TAKE1("VirtualScriptAlias", vhost_alias_set,
+ &vhost_alias_set_cgi_root_name, RSRC_CONF,
+ "how to create a ScriptAlias based on the host"),
+ AP_INIT_TAKE1("VirtualDocumentRoot", vhost_alias_set,
+ &vhost_alias_set_doc_root_name, RSRC_CONF,
+ "how to create the DocumentRoot based on the host"),
+ AP_INIT_TAKE1("VirtualScriptAliasIP", vhost_alias_set,
+ &vhost_alias_set_cgi_root_ip, RSRC_CONF,
+ "how to create a ScriptAlias based on the host"),
+ AP_INIT_TAKE1("VirtualDocumentRootIP", vhost_alias_set,
+ &vhost_alias_set_doc_root_ip, RSRC_CONF,
+ "how to create the DocumentRoot based on the host"),
+ { NULL }
+};
+
+
+/*
+ * This really wants to be a nested function
+ * but C is too feeble to support them.
+ */
+static APR_INLINE void vhost_alias_checkspace(request_rec *r, char *buf,
+ char **pdest, int size)
+{
+ /* XXX: what if size > HUGE_STRING_LEN? */
+ if (*pdest + size > buf + HUGE_STRING_LEN) {
+ **pdest = '\0';
+ if (r->filename) {
+ r->filename = apr_pstrcat(r->pool, r->filename, buf, NULL);
+ }
+ else {
+ r->filename = apr_pstrdup(r->pool, buf);
+ }
+ *pdest = buf;
+ }
+}
+
+static void vhost_alias_interpolate(request_rec *r, const char *name,
+ const char *map, const char *uri)
+{
+ /* 0..9 9..0 */
+ enum { MAXDOTS = 19 };
+ const char *dots[MAXDOTS+1];
+ int ndots;
+
+ char buf[HUGE_STRING_LEN];
+ char *dest;
+ const char *docroot;
+
+ int N, M, Np, Mp, Nd, Md;
+ const char *start, *end;
+
+ const char *p;
+
+ ndots = 0;
+ dots[ndots++] = name-1; /* slightly naughty */
+ for (p = name; *p; ++p) {
+ if (*p == '.' && ndots < MAXDOTS) {
+ dots[ndots++] = p;
+ }
+ }
+ dots[ndots] = p;
+
+ r->filename = NULL;
+
+ dest = buf;
+ while (*map) {
+ if (*map != '%') {
+ /* normal characters */
+ vhost_alias_checkspace(r, buf, &dest, 1);
+ *dest++ = *map++;
+ continue;
+ }
+ /* we are in a format specifier */
+ ++map;
+ /* %% -> % */
+ if (*map == '%') {
+ ++map;
+ vhost_alias_checkspace(r, buf, &dest, 1);
+ *dest++ = '%';
+ continue;
+ }
+ /* port number */
+ if (*map == 'p') {
+ ++map;
+ /* no. of decimal digits in a short plus one */
+ vhost_alias_checkspace(r, buf, &dest, 7);
+ dest += apr_snprintf(dest, 7, "%d", ap_get_server_port(r));
+ continue;
+ }
+ /* deal with %-N+.-M+ -- syntax is already checked */
+ M = 0; /* value */
+ Np = Mp = 0; /* is there a plus? */
+ Nd = Md = 0; /* is there a dash? */
+ if (*map == '-') ++map, Nd = 1;
+ N = *map++ - '0';
+ if (*map == '+') ++map, Np = 1;
+ if (*map == '.') {
+ ++map;
+ if (*map == '-') {
+ ++map, Md = 1;
+ }
+ M = *map++ - '0';
+ if (*map == '+') {
+ ++map, Mp = 1;
+ }
+ }
+ /* note that N and M are one-based indices, not zero-based */
+ start = dots[0]+1; /* ptr to the first character */
+ end = dots[ndots]; /* ptr to the character after the last one */
+ if (N != 0) {
+ if (N > ndots) {
+ start = "_";
+ end = start+1;
+ }
+ else if (!Nd) {
+ start = dots[N-1]+1;
+ if (!Np) {
+ end = dots[N];
+ }
+ }
+ else {
+ if (!Np) {
+ start = dots[ndots-N]+1;
+ }
+ end = dots[ndots-N+1];
+ }
+ }
+ if (M != 0) {
+ if (M > end - start) {
+ start = "_";
+ end = start+1;
+ }
+ else if (!Md) {
+ start = start+M-1;
+ if (!Mp) {
+ end = start+1;
+ }
+ }
+ else {
+ if (!Mp) {
+ start = end-M;
+ }
+ end = end-M+1;
+ }
+ }
+ vhost_alias_checkspace(r, buf, &dest, end - start);
+ for (p = start; p < end; ++p) {
+ *dest++ = apr_tolower(*p);
+ }
+ }
+ /* no double slashes */
+ if (dest - buf > 0 && dest[-1] == '/') {
+ --dest;
+ }
+ *dest = '\0';
+
+ if (r->filename)
+ docroot = apr_pstrcat(r->pool, r->filename, buf, NULL);
+ else
+ docroot = apr_pstrdup(r->pool, buf);
+ r->filename = apr_pstrcat(r->pool, docroot, uri, NULL);
+ ap_set_context_info(r, NULL, docroot);
+ ap_set_document_root(r, docroot);
+}
+
+static int mva_translate(request_rec *r)
+{
+ mva_sconf_t *conf;
+ const char *name, *map, *uri;
+ mva_mode_e mode;
+ const char *cgi;
+
+ conf = (mva_sconf_t *) ap_get_module_config(r->server->module_config,
+ &vhost_alias_module);
+ cgi = NULL;
+ if (conf->cgi_root) {
+ cgi = strstr(r->uri, "cgi-bin/");
+ if (cgi && (cgi != r->uri + strspn(r->uri, "/"))) {
+ cgi = NULL;
+ }
+ }
+ if (cgi) {
+ mode = conf->cgi_root_mode;
+ map = conf->cgi_root;
+ uri = cgi + strlen("cgi-bin");
+ }
+ else if (r->uri[0] == '/') {
+ mode = conf->doc_root_mode;
+ map = conf->doc_root;
+ uri = r->uri;
+ }
+ else {
+ return DECLINED;
+ }
+
+ if (mode == VHOST_ALIAS_NAME) {
+ name = ap_get_server_name(r);
+ }
+ else if (mode == VHOST_ALIAS_IP) {
+ name = r->connection->local_ip;
+ }
+ else {
+ return DECLINED;
+ }
+
+ /* ### There is an optimization available here to determine the
+ * absolute portion of the path from the server config phase,
+ * through the first % segment, and note that portion of the path
+ * canonical_path buffer.
+ */
+ r->canonical_filename = "";
+ vhost_alias_interpolate(r, name, map, uri);
+
+ if (cgi) {
+ /* see is_scriptaliased() in mod_cgi */
+ r->handler = "cgi-script";
+ apr_table_setn(r->notes, "alias-forced-type", r->handler);
+ ap_set_context_info(r, "/cgi-bin", NULL);
+ }
+
+ return OK;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+ static const char * const aszPre[]={ "mod_alias.c","mod_userdir.c",NULL };
+
+ ap_hook_translate_name(mva_translate, aszPre, NULL, APR_HOOK_MIDDLE);
+}
+
+AP_DECLARE_MODULE(vhost_alias) =
+{
+ STANDARD20_MODULE_STUFF,
+ NULL, /* dir config creater */
+ NULL, /* dir merger --- default is to override */
+ mva_create_server_config, /* server config */
+ mva_merge_server_config, /* merge server configs */
+ mva_commands, /* command apr_table_t */
+ register_hooks /* register hooks */
+};
+
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