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/* |
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* Boa, an http server |
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* Copyright (C) 2002 Nikos Mavroyanopoulos <nmav@gnutls.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 1, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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/* $Id: virthost.c,v 1.2 2002/09/24 18:07:58 nmav Exp $ */ |
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|
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#include "boa.h" |
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|
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static virthost *virthost_hashtable[ALIAS_HASHTABLE_SIZE]; |
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|
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/* |
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* Name: get_host_hash_value |
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* |
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* Here we simply use the algorithm used in get_alias_hash_value(); |
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*/ |
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|
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int get_host_hash_value(const char *file) |
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{ |
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unsigned int hash = 0; |
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unsigned int index = 0; |
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unsigned char c; |
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|
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hash = file[index++]; |
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while ((c = file[index++]) && c != '/') |
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hash += (unsigned int) c; |
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|
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return hash % VIRTHOST_HASHTABLE_SIZE; |
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} |
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|
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/* |
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* Name: add_virthost |
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* |
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* Description: add a virtual host to the virthost hash table. |
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*/ |
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|
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void add_virthost(const char *host, const char *ip, const char* document_root, |
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const char* user_dir) |
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{ |
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int hash; |
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virthost *old, *new; |
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int hostlen, iplen, document_root_len, user_dir_len = 0; |
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|
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/* sanity checking */ |
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if (host == NULL || ip == NULL || document_root == NULL) { |
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DIE("NULL values sent to add_virthost"); |
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} |
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|
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iplen = strlen(ip); |
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|
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if (iplen > NI_MAXHOST) { |
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DIE("IP in virthost is tooooo long"); |
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} |
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hostlen = strlen(host); |
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document_root_len = strlen( document_root); |
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if (user_dir) user_dir_len = strlen( user_dir); |
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|
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if (iplen == 0 || hostlen == 0 || document_root_len == 0) { |
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DIE("empty values sent to add_virthost"); |
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} |
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|
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hash = get_host_hash_value( host); |
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|
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old = virthost_hashtable[hash]; |
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|
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if (old) { |
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while (old->next) { |
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if (!strcmp( host, old->host)) /* don't add twice */ |
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return; |
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old = old->next; |
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} |
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} |
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|
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new = (virthost *) malloc(sizeof (virthost)); |
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if (!new) { |
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DIE("out of memory adding virthost to hash"); |
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} |
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|
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if (old) |
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old->next = new; |
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else |
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virthost_hashtable[hash] = new; |
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|
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new->host = strdup( host); |
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if (!new->host) { |
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DIE("failed strdup"); |
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} |
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new->host_len = hostlen; |
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|
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if (user_dir && user_dir_len > 0) { |
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new->user_dir = strdup(user_dir); |
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new->user_dir_len = user_dir_len; |
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} else { |
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new->user_dir = NULL; |
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new->user_dir_len = 0; |
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} |
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|
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if (iplen == 0 || !strchr( ip, '*')) { /* if the IP part is '*' then |
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* we don't bind this virthost to a |
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* specific ip */ |
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new->ip = strdup( ip); |
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if (!new->ip) { |
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DIE("failed strdup"); |
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} |
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new->ip_len = iplen; |
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} else { |
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new->ip = NULL; |
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new->ip_len = 0; |
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} |
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|
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/* check for "here" */ |
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if (document_root[0] == '.' && document_root[1] == '/') { |
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new->document_root = normalize_path( (char*)(document_root+2)); |
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if (!new->document_root) { |
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/* superfluous - normalize_path checks for NULL return values. */ |
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DIE("normalize_path returned NULL"); |
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} |
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document_root_len = strlen(new->document_root); |
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} else { |
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new->document_root = strdup(document_root); |
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if (!new->document_root) { |
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DIE("strdup of document_root failed"); |
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} |
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} |
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new->document_root_len = document_root_len; |
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|
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new->next = NULL; |
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} |
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|
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/* |
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* Name: find_virthost |
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* |
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* Description: Locates host in the virthost hashtable if it exists. |
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* |
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* Returns: |
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* |
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* virthost structure or NULL if not found |
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*/ |
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|
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virthost *find_virthost(const char *host, int hostlen) |
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{ |
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virthost *current; |
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int hash; |
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|
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/* Find Hostname, IP, document root */ |
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|
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if (hostlen == 0) |
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hostlen = strlen(host); |
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|
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hash = get_host_hash_value( host); |
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|
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current = virthost_hashtable[hash]; |
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while (current) { |
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#ifdef FASCIST_LOGGING |
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fprintf(stderr, |
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"%s:%d - comparing \"%s\" (request) to \"%s\" (virthost): ", |
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__FILE__, __LINE__, host, current->host); |
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#endif |
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/* current->host_len must always be: |
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* equal to the host |
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*/ |
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if (current->host_len == hostlen && |
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!memcmp(host, current->host, current->host_len)) { |
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#ifdef FASCIST_LOGGING |
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fprintf(stderr, "Got it!\n"); |
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#endif |
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return current; |
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} |
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#ifdef FASCIST_LOGGING |
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else |
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fprintf(stderr, "Don't Got it!\n"); |
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#endif |
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current = current->next; |
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} |
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return current; |
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} |
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|
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|
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|
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/* |
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* Empties the virthost hashtable, deallocating any allocated memory. |
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*/ |
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|
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void dump_virthost(void) |
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{ |
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int i; |
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virthost *temp; |
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|
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for (i = 0; i < VIRTHOST_HASHTABLE_SIZE; ++i) { /* these limits OK? */ |
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if (virthost_hashtable[i]) { |
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temp = virthost_hashtable[i]; |
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while (temp) { |
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virthost *temp_next; |
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|
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if (temp->host) |
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free(temp->host); |
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if (temp->ip) |
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free(temp->ip); |
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if (temp->document_root) |
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free(temp->document_root); |
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if (temp->user_dir) |
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free(temp->user_dir); |
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temp_next = temp->next; |
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free(temp); |
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temp = temp_next; |
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} |
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virthost_hashtable[i] = NULL; |
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} |
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} |
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} |