src/bnetd/file.c

/*
 * Copyright (C) 1998,1999  Ross Combs (rocombs@cs.nmsu.edu)
 * Copyright (C) 1999  Rob Crittenden (rcrit@greyoak.com)
 *
 * 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 2
 * of the License, 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include "common/setup_before.h"
#include <stdio.h>
#ifdef HAVE_STDDEF_H
# include <stddef.h>
#else
# ifndef NULL
#  define NULL ((void *)0)
# endif
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
#else
# ifdef HAVE_MALLOC_H
#  include <malloc.h>
# endif
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
#  include <strings.h>
# endif
#endif
#include "compat/strchr.h"
#include <errno.h>
#include "compat/strerror.h"
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#include "common/bn_type.h"
#include "common/queue.h"
#include "connection.h"
#include "common/packet.h"
#include "common/file_protocol.h"
#include "common/eventlog.h"
#include "prefs.h"
#include "common/bnettime.h"
#include "common/util.h"
#include "common/xalloc.h"
#include "file.h"
#include "common/setup_after.h"


static char const * file_get_info(char const * rawname, unsigned int * len, bn_long * modtime);

static char * file_find_default(const char *rawname)
{
    /* Add new default files here */
    const char * defaultfiles[]={"termsofservice-",".txt",
                                 "newaccount-",".txt",
                                 "chathelp-war3-",".txt",
                                 "matchmaking-war3-",".dat",
                                 NULL,NULL};
    const char ** pattern, **extension;
    char *filename = NULL;

    for (pattern = defaultfiles, extension = defaultfiles + 1; *pattern; pattern+=2, extension+=2)
        if (!strncmp(rawname, *pattern,strlen(*pattern))) {     /* Check if there is a default file available for this kind of file */
            filename = (char*)xmalloc(strlen(prefs_get_filedir()) + 1 + strlen(*pattern) + 7 + strlen(*extension) + 1);

            strcpy(filename, prefs_get_filedir());
            strcat(filename, "/");
            strcat(filename, *pattern);
            strcat(filename, "default");
            strcat(filename, *extension);

            break;
        }

    return filename;
}

static char const * file_get_info(char const * rawname, unsigned int * len, bn_long * modtime)
{
    char *filename;
    struct stat  sfile;
    t_bnettime   bt;

    if (!rawname) {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL rawname");
        return NULL;
    }

    if (!len) {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL len");
        return NULL;
    }

    if (!modtime) {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL modtime");
        return NULL;
    }

    if (strchr(rawname,'/') || strchr(rawname,'\\')) {
        eventlog(eventlog_level_warn,__FUNCTION__,"got rawname containing '/' or '\\' \"%s\"",rawname);
        return NULL;
    }

    filename = buildpath(prefs_get_filedir(), rawname);

    if (stat(filename,&sfile)<0) { /* if it doesn't exist, try to replace with default file */
        xfree((void*)filename);
        filename = file_find_default(rawname);
        if (!filename) return NULL; /* no default version */

        if (stat(filename,&sfile)<0) { /* try again */
            /* FIXME: check for lower-case version of filename */
            xfree(filename);
            return NULL;
        }
    }

    *len = (unsigned int)sfile.st_size;
    bt = time_to_bnettime(sfile.st_mtime,0);
    bnettime_to_bn_long(bt,modtime);

    return filename;
}


extern int file_to_mod_time(char const * rawname, bn_long * modtime)
{
    char const * filename;
    unsigned int len;
    
    if (!rawname)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL rawname");
        return -1;
    }
    if (!modtime)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL modtime");
        return -1;
    }
    
    if (!(filename = file_get_info(rawname, &len, modtime)))
        return -1;
    
    xfree((void *)filename); /* avoid warning */
    
    return 0;
}


/* Send a file.  If the file doesn't exist we still need to respond
 * to the file request.  This will set filelen to 0 and send the server
 * reply message and the client will be happy and not hang.
 */
extern int file_send(t_connection * c, char const * rawname, unsigned int adid, unsigned int etag, unsigned int startoffset, int need_header)
{
    char const * filename;
    t_packet *   rpacket;
    FILE *       fp;
    unsigned int filelen;
    int          nbytes;
    
    if (!c)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return -1;
    }
    if (!rawname)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL rawname");
        return -1;
    }
    
    if (!(rpacket = packet_create(packet_class_file)))
    {
        eventlog(eventlog_level_error,__FUNCTION__,"could not create file packet");
        return -1;
    }
    packet_set_size(rpacket,sizeof(t_server_file_reply));
    packet_set_type(rpacket,SERVER_FILE_REPLY);
    
    if ((filename = file_get_info(rawname,&filelen,&rpacket->u.server_file_reply.timestamp)))
    {
        if (!(fp = fopen(filename,"rb")))
        {
            /* FIXME: check for lower-case version of filename */
            eventlog(eventlog_level_error,__FUNCTION__,"stat() succeeded yet could not open file \"%s\" for reading (fclose: %s)",filename,pstrerror(errno));
            filelen = 0;
        }
        xfree((void *)filename); /* avoid warning */
    }
    else
    {
        fp = NULL;
        filelen = 0;
        bn_long_set_a_b(&rpacket->u.server_file_reply.timestamp,0,0);
    }
    
    if (fp)
    {
        if (startoffset<filelen) {
            fseek(fp,startoffset,SEEK_SET);
        } else {
            eventlog(eventlog_level_warn,__FUNCTION__,"[%d] startoffset is beyond end of file (%u>%u)",conn_get_socket(c),startoffset,filelen);
            /* Keep the real filesize. Battle.net does it the same way ... */
            fclose(fp);
            fp = NULL;
        }
    }

    if (need_header)
    {
        /* send the header from the server with the rawname and length. */
        bn_int_set(&rpacket->u.server_file_reply.filelen,filelen);
        bn_int_set(&rpacket->u.server_file_reply.adid,adid);
        bn_int_set(&rpacket->u.server_file_reply.extensiontag,etag);
        /* rpacket->u.server_file_reply.timestamp is set above */
        packet_append_string(rpacket,rawname);
        conn_push_outqueue(c,rpacket);
    }
    packet_del_ref(rpacket);

    /* Now send the data. Since it may be longer than a packet; we use
     * the raw packet class.
     */
    if (!fp)
    {
        eventlog(eventlog_level_warn,__FUNCTION__,"[%d] sending no data for file \"%s\"",conn_get_socket(c),rawname);
        return -1;
    }
    
    eventlog(eventlog_level_info,__FUNCTION__,"[%d] sending file \"%s\" of length %d",conn_get_socket(c),rawname,filelen);
    for (;;)
    {
        if (!(rpacket = packet_create(packet_class_raw)))
        {
            eventlog(eventlog_level_error,__FUNCTION__,"could not create raw packet");
            if (fclose(fp)<0)
                eventlog(eventlog_level_error,__FUNCTION__,"could not close file \"%s\" after reading (fclose: %s)",rawname,pstrerror(errno));
            return -1;
        }
        if ((nbytes = fread(packet_get_raw_data_build(rpacket,0),1,MAX_PACKET_SIZE,fp))<(int)MAX_PACKET_SIZE)
        {
            if (nbytes>0) /* send out last portion */
            {
                packet_set_size(rpacket,nbytes);
                conn_push_outqueue(c,rpacket);
            }
            packet_del_ref(rpacket);
            if (ferror(fp))
                eventlog(eventlog_level_error,__FUNCTION__,"read failed before EOF on file \"%s\" (fread: %s)",rawname,pstrerror(errno));
            break;
        }
        packet_set_size(rpacket,nbytes);
        conn_push_outqueue(c,rpacket);
        packet_del_ref(rpacket);
    }
    
    if (fclose(fp)<0)
        eventlog(eventlog_level_error,__FUNCTION__,"could not close file \"%s\" after reading (fclose: %s)",rawname,pstrerror(errno));
    return 0;
}
1	/*
2	* Copyright (C) 1998,1999 Ross Combs (rocombs@cs.nmsu.edu)
3	* Copyright (C) 1999 Rob Crittenden (rcrit@greyoak.com)
4	*
5	* This program is free software; you can redistribute it and/or
6	* modify it under the terms of the GNU General Public License
7	* as published by the Free Software Foundation; either version 2
8	* of the License, or (at your option) any later version.
9	*
10	* This program is distributed in the hope that it will be useful,
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	* GNU General Public License for more details.
14	*
15	* You should have received a copy of the GNU General Public License
16	* along with this program; if not, write to the Free Software
17	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18	*/
19	#include "common/setup_before.h"
20	#include <stdio.h>
21	#ifdef HAVE_STDDEF_H
22	# include <stddef.h>
23	#else
24	# ifndef NULL
25	# define NULL ((void *)0)
26	# endif
27	#endif
28	#ifdef STDC_HEADERS
29	# include <stdlib.h>
30	#else
31	# ifdef HAVE_MALLOC_H
32	# include <malloc.h>
33	# endif
34	#endif
35	#ifdef HAVE_STRING_H
36	# include <string.h>
37	#else
38	# ifdef HAVE_STRINGS_H
39	# include <strings.h>
40	# endif
41	#endif
42	#include "compat/strchr.h"
43	#include <errno.h>
44	#include "compat/strerror.h"
45	#ifdef HAVE_SYS_TYPES_H
46	# include <sys/types.h>
47	#endif
48	#ifdef HAVE_SYS_STAT_H
49	# include <sys/stat.h>
50	#endif
51	#include "common/bn_type.h"
52	#include "common/queue.h"
53	#include "connection.h"
54	#include "common/packet.h"
55	#include "common/file_protocol.h"
56	#include "common/eventlog.h"
57	#include "prefs.h"
58	#include "common/bnettime.h"
59	#include "common/util.h"
60	#include "common/xalloc.h"
61	#include "file.h"
62	#include "common/setup_after.h"
63
64
65	static char const * file_get_info(char const * rawname, unsigned int * len, bn_long * modtime);
66
67	static char * file_find_default(const char *rawname)
68	{
69	/* Add new default files here */
70	const char * defaultfiles[]={"termsofservice-",".txt",
71	"newaccount-",".txt",
72	"chathelp-war3-",".txt",
73	"matchmaking-war3-",".dat",
74	NULL,NULL};
75	const char pattern, extension;
76	char *filename = NULL;
77
78	for (pattern = defaultfiles, extension = defaultfiles + 1; *pattern; pattern+=2, extension+=2)
79	if (!strncmp(rawname, pattern,strlen(pattern))) { /* Check if there is a default file available for this kind of file */
80	filename = (char)xmalloc(strlen(prefs_get_filedir()) + 1 + strlen(pattern) + 7 + strlen(*extension) + 1);
81
82	strcpy(filename, prefs_get_filedir());
83	strcat(filename, "/");
84	strcat(filename, *pattern);
85	strcat(filename, "default");
86	strcat(filename, *extension);
87
88	break;
89	}
90
91	return filename;
92	}
93
94	static char const * file_get_info(char const * rawname, unsigned int * len, bn_long * modtime)
95	{
96	char *filename;
97	struct stat sfile;
98	t_bnettime bt;
99
100	if (!rawname) {
101	eventlog(eventlog_level_error,__FUNCTION__,"got NULL rawname");
102	return NULL;
103	}
104
105	if (!len) {
106	eventlog(eventlog_level_error,__FUNCTION__,"got NULL len");
107	return NULL;
108	}
109
110	if (!modtime) {
111	eventlog(eventlog_level_error,__FUNCTION__,"got NULL modtime");
112	return NULL;
113	}
114
115	if (strchr(rawname,'/') \|\| strchr(rawname,'\\')) {
116	eventlog(eventlog_level_warn,__FUNCTION__,"got rawname containing '/' or '\\' \"%s\"",rawname);
117	return NULL;
118	}
119
120	filename = buildpath(prefs_get_filedir(), rawname);
121
122	if (stat(filename,&sfile)<0) { /* if it doesn't exist, try to replace with default file */
123	xfree((void*)filename);
124	filename = file_find_default(rawname);
125	if (!filename) return NULL; /* no default version */
126
127	if (stat(filename,&sfile)<0) { /* try again */
128	/* FIXME: check for lower-case version of filename */
129	xfree(filename);
130	return NULL;
131	}
132	}
133
134	*len = (unsigned int)sfile.st_size;
135	bt = time_to_bnettime(sfile.st_mtime,0);
136	bnettime_to_bn_long(bt,modtime);
137
138	return filename;
139	}
140
141
142	extern int file_to_mod_time(char const * rawname, bn_long * modtime)
143	{
144	char const * filename;
145	unsigned int len;
146
147	if (!rawname)
148	{
149	eventlog(eventlog_level_error,__FUNCTION__,"got NULL rawname");
150	return -1;
151	}
152	if (!modtime)
153	{
154	eventlog(eventlog_level_error,__FUNCTION__,"got NULL modtime");
155	return -1;
156	}
157
158	if (!(filename = file_get_info(rawname, &len, modtime)))
159	return -1;
160
161	xfree((void )filename); / avoid warning */
162
163	return 0;
164	}
165
166
167	/* Send a file. If the file doesn't exist we still need to respond
168	* to the file request. This will set filelen to 0 and send the server
169	* reply message and the client will be happy and not hang.
170	*/
171	extern int file_send(t_connection * c, char const * rawname, unsigned int adid, unsigned int etag, unsigned int startoffset, int need_header)
172	{
173	char const * filename;
174	t_packet * rpacket;
175	FILE * fp;
176	unsigned int filelen;
177	int nbytes;
178
179	if (!c)
180	{
181	eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
182	return -1;
183	}
184	if (!rawname)
185	{
186	eventlog(eventlog_level_error,__FUNCTION__,"got NULL rawname");
187	return -1;
188	}
189
190	if (!(rpacket = packet_create(packet_class_file)))
191	{
192	eventlog(eventlog_level_error,__FUNCTION__,"could not create file packet");
193	return -1;
194	}
195	packet_set_size(rpacket,sizeof(t_server_file_reply));
196	packet_set_type(rpacket,SERVER_FILE_REPLY);
197
198	if ((filename = file_get_info(rawname,&filelen,&rpacket->u.server_file_reply.timestamp)))
199	{
200	if (!(fp = fopen(filename,"rb")))
201	{
202	/* FIXME: check for lower-case version of filename */
203	eventlog(eventlog_level_error,__FUNCTION__,"stat() succeeded yet could not open file \"%s\" for reading (fclose: %s)",filename,pstrerror(errno));
204	filelen = 0;
205	}
206	xfree((void )filename); / avoid warning */
207	}
208	else
209	{
210	fp = NULL;
211	filelen = 0;
212	bn_long_set_a_b(&rpacket->u.server_file_reply.timestamp,0,0);
213	}
214
215	if (fp)
216	{
217	if (startoffset<filelen) {
218	fseek(fp,startoffset,SEEK_SET);
219	} else {
220	eventlog(eventlog_level_warn,__FUNCTION__,"[%d] startoffset is beyond end of file (%u>%u)",conn_get_socket(c),startoffset,filelen);
221	/* Keep the real filesize. Battle.net does it the same way ... */
222	fclose(fp);
223	fp = NULL;
224	}
225	}
226
227	if (need_header)
228	{
229	/* send the header from the server with the rawname and length. */
230	bn_int_set(&rpacket->u.server_file_reply.filelen,filelen);
231	bn_int_set(&rpacket->u.server_file_reply.adid,adid);
232	bn_int_set(&rpacket->u.server_file_reply.extensiontag,etag);
233	/* rpacket->u.server_file_reply.timestamp is set above */
234	packet_append_string(rpacket,rawname);
235	conn_push_outqueue(c,rpacket);
236	}
237	packet_del_ref(rpacket);
238
239	/* Now send the data. Since it may be longer than a packet; we use
240	* the raw packet class.
241	*/
242	if (!fp)
243	{
244	eventlog(eventlog_level_warn,__FUNCTION__,"[%d] sending no data for file \"%s\"",conn_get_socket(c),rawname);
245	return -1;
246	}
247
248	eventlog(eventlog_level_info,__FUNCTION__,"[%d] sending file \"%s\" of length %d",conn_get_socket(c),rawname,filelen);
249	for (;;)
250	{
251	if (!(rpacket = packet_create(packet_class_raw)))
252	{
253	eventlog(eventlog_level_error,__FUNCTION__,"could not create raw packet");
254	if (fclose(fp)<0)
255	eventlog(eventlog_level_error,__FUNCTION__,"could not close file \"%s\" after reading (fclose: %s)",rawname,pstrerror(errno));
256	return -1;
257	}
258	if ((nbytes = fread(packet_get_raw_data_build(rpacket,0),1,MAX_PACKET_SIZE,fp))<(int)MAX_PACKET_SIZE)
259	{
260	if (nbytes>0) /* send out last portion */
261	{
262	packet_set_size(rpacket,nbytes);
263	conn_push_outqueue(c,rpacket);
264	}
265	packet_del_ref(rpacket);
266	if (ferror(fp))
267	eventlog(eventlog_level_error,__FUNCTION__,"read failed before EOF on file \"%s\" (fread: %s)",rawname,pstrerror(errno));
268	break;
269	}
270	packet_set_size(rpacket,nbytes);
271	conn_push_outqueue(c,rpacket);
272	packet_del_ref(rpacket);
273	}
274
275	if (fclose(fp)<0)
276	eventlog(eventlog_level_error,__FUNCTION__,"could not close file \"%s\" after reading (fclose: %s)",rawname,pstrerror(errno));
277	return 0;
278	}
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