hydra/src/virthost.c

/*
 *  Boa, an http server
 *  Copyright (C) 1995 Paul Phillips <paulp@go2net.com>
 *  Some changes Copyright (C) 1996 Larry Doolittle <ldoolitt@boa.org>
 *  Some changes Copyright (C) 1996 Russ Nelson <nelson@crynwr.com>
 *  Some changes Copyright (C) 1996-2002 Jon Nelson <jnelson@boa.org>
 *  Portions Copyright (C) 2002 Nikos Mavroyanopoulos <nmav@gnutls.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 1, or (at your option)
 *  any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/* $Id: virthost.c,v 1.2 2002/09/22 09:07:57 nmav Exp $ */

#include "boa.h"

static virthost *virthost_hashtable[ALIAS_HASHTABLE_SIZE];

/*
 * Name: get_host_hash_value
 *
 * Here we simply use the algorithm used in get_alias_hash_value();
 */

int get_host_hash_value(const char *file)
{
    unsigned int hash = 0;
    unsigned int index = 0;
    unsigned char c;

    hash = file[index++];
    while ((c = file[index++]) && c != '/')
        hash += (unsigned int) c;

    return hash % VIRTHOST_HASHTABLE_SIZE;
}

/*
 * Name: add_virthost
 *
 * Description: add a virtual host to the virthost hash table.
 */

void add_virthost(const char *host, const char *ip, const char* document_root,
        const char* user_dir)
{
    int hash;
    virthost *old, *new;
    int hostlen, iplen, document_root_len, user_dir_len = 0;

    /* sanity checking */
    if (host == NULL || ip == NULL || document_root == NULL) {
        DIE("NULL values sent to add_virthost");
    }

    iplen = strlen(ip);
    
    if (iplen > NI_MAXHOST) {
        DIE("IP in virthost is tooooo long");
    }
    hostlen = strlen(host);
    document_root_len = strlen( document_root);
    if (user_dir) user_dir_len = strlen( user_dir);

    if (iplen == 0 || hostlen == 0 || document_root_len == 0) {
        DIE("empty values sent to add_virthost");
    }

    hash = get_host_hash_value( host);

    old = virthost_hashtable[hash];

    if (old) {
        while (old->next) {
            if (!strcmp( host, old->host)) /* don't add twice */
                return;
            old = old->next;
        }
    }

    new = (virthost *) malloc(sizeof (virthost));
    if (!new) {
        DIE("out of memory adding virthost to hash");
    }

    if (old)
        old->next = new;
    else
        virthost_hashtable[hash] = new;

    new->host = strdup( host);
    if (!new->host) {
        DIE("failed strdup");
    }
    new->host_len = hostlen;

    if (user_dir && user_dir_len > 0) {
        new->user_dir = strdup(user_dir);
        new->user_dir_len = user_dir_len;
    } else {
        new->user_dir = NULL;
        new->user_dir_len = 0;
    }

    if (iplen == 0 || !strchr( ip, '*')) { /* if the IP part is '*' then 
                             * we don't bind this virthost to a
                             * specific ip */
        new->ip = strdup( ip);
        if (!new->ip) {
           DIE("failed strdup");
        }
        new->ip_len = iplen;
    } else {
        new->ip = NULL;
        new->ip_len = 0;
    }

    /* check for "here" */
    if (document_root[0] == '.' && document_root[1] == '/') {
        new->document_root = normalize_path( (char*)(document_root+2));
        if (!new->document_root) {
            /* superfluous - normalize_path checks for NULL return values. */
            DIE("normalize_path returned NULL");
        }
        document_root_len = strlen(new->document_root);
    } else {
        new->document_root = strdup(document_root);
        if (!new->document_root) {
            DIE("strdup of document_root failed");
        }
    }
    new->document_root_len = document_root_len;

    new->next = NULL;
}

/*
 * Name: find_virthost
 *
 * Description: Locates host in the virthost hashtable if it exists.
 *
 * Returns:
 *
 * virthost structure or NULL if not found
 */

virthost *find_virthost(const char *host, int hostlen)
{
    virthost *current;
    int hash;

    /* Find Hostname, IP, document root */

    if (hostlen == 0)
        hostlen = strlen(host);

    hash = get_host_hash_value( host);

    current = virthost_hashtable[hash];
    while (current) {
#ifdef FASCIST_LOGGING
        fprintf(stderr,
                "%s:%d - comparing \"%s\" (request) to \"%s\" (virthost): ",
                __FILE__, __LINE__, host, current->host);
#endif
        /* current->host_len must always be:
         *  equal to the host
         */
        if (current->host_len == hostlen &&
            !memcmp(host, current->host, current->host_len)) {
#ifdef FASCIST_LOGGING
                fprintf(stderr, "Got it!\n");
#endif
                return current;
        }
#ifdef FASCIST_LOGGING
        else
            fprintf(stderr, "Don't Got it!\n");
#endif
        current = current->next;
    }
    return current;
}


/*
 * Empties the virthost hashtable, deallocating any allocated memory.
 */

void dump_virthost(void)
{
    int i;
    virthost *temp;

    for (i = 0; i < VIRTHOST_HASHTABLE_SIZE; ++i) { /* these limits OK? */
        if (virthost_hashtable[i]) {
            temp = virthost_hashtable[i];
            while (temp) {
                virthost *temp_next;

                if (temp->host)
                    free(temp->host);
                if (temp->ip)
                    free(temp->ip);
                if (temp->document_root)
                    free(temp->document_root);
                temp_next = temp->next;
                free(temp);
                temp = temp_next;
            }
            virthost_hashtable[i] = NULL;
        }
    }
}
1	nmav	1.1	/*
2			* Boa, an http server
3			* Copyright (C) 1995 Paul Phillips <paulp@go2net.com>
4			* Some changes Copyright (C) 1996 Larry Doolittle <ldoolitt@boa.org>
5			* Some changes Copyright (C) 1996 Russ Nelson <nelson@crynwr.com>
6			* Some changes Copyright (C) 1996-2002 Jon Nelson <jnelson@boa.org>
7			* Portions Copyright (C) 2002 Nikos Mavroyanopoulos <nmav@gnutls.org>
8			*
9			* This program is free software; you can redistribute it and/or modify
10			* it under the terms of the GNU General Public License as published by
11			* the Free Software Foundation; either version 1, or (at your option)
12			* any later version.
13			*
14			* This program is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17			* GNU General Public License for more details.
18			*
19			* You should have received a copy of the GNU General Public License
20			* along with this program; if not, write to the Free Software
21			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22			*
23			*/
24
25			/* $Id: virthost.c,v 1.2 2002/09/22 09:07:57 nmav Exp $ */
26
27			#include "boa.h"
28
29			static virthost *virthost_hashtable[ALIAS_HASHTABLE_SIZE];
30
31			/*
32			* Name: get_host_hash_value
33			*
34			* Here we simply use the algorithm used in get_alias_hash_value();
35			*/
36
37			int get_host_hash_value(const char *file)
38			{
39			unsigned int hash = 0;
40			unsigned int index = 0;
41			unsigned char c;
42
43			hash = file[index++];
44			while ((c = file[index++]) && c != '/')
45			hash += (unsigned int) c;
46
47			return hash % VIRTHOST_HASHTABLE_SIZE;
48			}
49
50			/*
51			* Name: add_virthost
52			*
53			* Description: add a virtual host to the virthost hash table.
54			*/
55
56			void add_virthost(const char host, const char ip, const char* document_root,
57			const char* user_dir)
58			{
59			int hash;
60			virthost old, new;
61			int hostlen, iplen, document_root_len, user_dir_len = 0;
62
63			/* sanity checking */
64			if (host == NULL \|\| ip == NULL \|\| document_root == NULL) {
65			DIE("NULL values sent to add_virthost");
66			}
67
68			iplen = strlen(ip);
69
70			if (iplen > NI_MAXHOST) {
71			DIE("IP in virthost is tooooo long");
72			}
73			hostlen = strlen(host);
74			document_root_len = strlen( document_root);
75			if (user_dir) user_dir_len = strlen( user_dir);
76
77			if (iplen == 0 \|\| hostlen == 0 \|\| document_root_len == 0) {
78			DIE("empty values sent to add_virthost");
79			}
80
81			hash = get_host_hash_value( host);
82
83			old = virthost_hashtable[hash];
84
85			if (old) {
86			while (old->next) {
87			if (!strcmp( host, old->host)) /* don't add twice */
88			return;
89			old = old->next;
90			}
91			}
92
93			new = (virthost *) malloc(sizeof (virthost));
94			if (!new) {
95			DIE("out of memory adding virthost to hash");
96			}
97
98			if (old)
99			old->next = new;
100			else
101			virthost_hashtable[hash] = new;
102
103			new->host = strdup( host);
104			if (!new->host) {
105			DIE("failed strdup");
106			}
107			new->host_len = hostlen;
108
109			if (user_dir && user_dir_len > 0) {
110			new->user_dir = strdup(user_dir);
111			new->user_dir_len = user_dir_len;
112			} else {
113			new->user_dir = NULL;
114			new->user_dir_len = 0;
115			}
116
117			if (iplen == 0 \|\| !strchr( ip, '')) { / if the IP part is '*' then
118			* we don't bind this virthost to a
119			* specific ip */
120			new->ip = strdup( ip);
121			if (!new->ip) {
122			DIE("failed strdup");
123			}
124			new->ip_len = iplen;
125			} else {
126			new->ip = NULL;
127			new->ip_len = 0;
128			}
129
130			/* check for "here" */
131			if (document_root[0] == '.' && document_root[1] == '/') {
132			new->document_root = normalize_path( (char*)(document_root+2));
133			if (!new->document_root) {
134			/* superfluous - normalize_path checks for NULL return values. */
135			DIE("normalize_path returned NULL");
136			}
137			document_root_len = strlen(new->document_root);
138			} else {
139			new->document_root = strdup(document_root);
140			if (!new->document_root) {
141			DIE("strdup of document_root failed");
142			}
143			}
144			new->document_root_len = document_root_len;
145
146			new->next = NULL;
147			}
148
149			/*
150			* Name: find_virthost
151			*
152			* Description: Locates host in the virthost hashtable if it exists.
153			*
154			* Returns:
155			*
156			* virthost structure or NULL if not found
157			*/
158
159			virthost find_virthost(const char host, int hostlen)
160			{
161			virthost *current;
162			int hash;
163
164			/* Find Hostname, IP, document root */
165
166			if (hostlen == 0)
167			hostlen = strlen(host);
168
169			hash = get_host_hash_value( host);
170
171			current = virthost_hashtable[hash];
172			while (current) {
173			#ifdef FASCIST_LOGGING
174			fprintf(stderr,
175			"%s:%d - comparing \"%s\" (request) to \"%s\" (virthost): ",
176			__FILE__, __LINE__, host, current->host);
177			#endif
178			/* current->host_len must always be:
179			* equal to the host
180			*/
181			if (current->host_len == hostlen &&
182			!memcmp(host, current->host, current->host_len)) {
183			#ifdef FASCIST_LOGGING
184			fprintf(stderr, "Got it!\n");
185			#endif
186			return current;
187			}
188			#ifdef FASCIST_LOGGING
189			else
190			fprintf(stderr, "Don't Got it!\n");
191			#endif
192			current = current->next;
193			}
194			return current;
195			}
196
197
198
199			/*
200			* Empties the virthost hashtable, deallocating any allocated memory.
201			*/
202
203			void dump_virthost(void)
204			{
205			int i;
206			virthost *temp;
207
208			for (i = 0; i < VIRTHOST_HASHTABLE_SIZE; ++i) { /* these limits OK? */
209			if (virthost_hashtable[i]) {
210			temp = virthost_hashtable[i];
211			while (temp) {
212			virthost *temp_next;
213
214			if (temp->host)
215			free(temp->host);
216			if (temp->ip)
217			free(temp->ip);
218			if (temp->document_root)
219			free(temp->document_root);
220			temp_next = temp->next;
221			free(temp);
222			temp = temp_next;
223			}
224			virthost_hashtable[i] = NULL;
225			}
226			}
227			}