src/bnetd/adbanner.c

/*
 * Copyright (C) 1999  Ross Combs (rocombs@cs.nmsu.edu)
 *
 * 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.
 */
#define ADBANNER_INTERNAL_ACCESS
#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
#ifdef HAVE_ASSERT_H
# include <assert.h>
#endif
#include "compat/strrchr.h"
#include "compat/strdup.h"
#include "compat/strcasecmp.h"
#include <errno.h>
#include "compat/strerror.h"
#include "common/tag.h"
#include "common/bn_type.h"
#include "common/eventlog.h"
#include "common/list.h"
#include "common/util.h"
#include "common/xalloc.h"
#include "connection.h"
#include "adbanner.h"
#include "common/setup_after.h"


static t_list * adbannerlist_init_head=NULL;
static t_list * adbannerlist_start_head=NULL;
static t_list * adbannerlist_norm_head=NULL;
static unsigned int adbannerlist_init_count=0;
static unsigned int adbannerlist_start_count=0;
static unsigned int adbannerlist_norm_count=0;


static t_adbanner * adbanner_create(unsigned int id, unsigned int next_id, unsigned int delay, bn_int tag, char const * filename, char const * link, char const * client);
static int adbanner_destroy(t_adbanner const * ad);
static int adbannerlist_insert(t_list * head, unsigned int * count, char const * filename, unsigned int delay, char const * link, unsigned int next_id, char const * client);
static t_adbanner * adbannerlist_find_adbanner_by_id(t_list const * head, unsigned int id, t_clienttag clienttag);
static t_adbanner * adbannerlist_get_random(t_list const * head, t_clienttag client);


static t_adbanner * adbanner_create(unsigned int id, unsigned int next_id, unsigned int delay, bn_int tag, char const * filename, char const * link, char const * client)
{
    t_adbanner * ad;
    
    if (!filename)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL filename");
        return NULL;
    }
    if (!link)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL link");
        return NULL;
    }
    if (!client)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL client");
        return NULL;
    }
    
    ad = xmalloc(sizeof(t_adbanner));
    
    ad->id           = id;
    ad->extensiontag = bn_int_get(tag);
    ad->delay        = delay;
    ad->next         = next_id;
    ad->filename = xstrdup(filename);
    ad->link = xstrdup(link);

    if (strcasecmp(client,"NULL")==0)
        ad->client = 0;
    else
        ad->client = clienttag_str_to_uint(client);

    /* I'm aware that this statement looks stupid */
    if (ad->client && (!tag_check_client(ad->client)))
    {
        eventlog(eventlog_level_error,__FUNCTION__,"banner with invalid clienttag \"%s\"encountered",client);
        xfree((void *)ad->link);
        xfree((void *)ad->filename); /* avoid warning */
        xfree(ad);
        return NULL;
    }


    eventlog(eventlog_level_debug,__FUNCTION__,"created ad id=0x%08x filename=\"%s\" extensiontag=0x%04x delay=%u link=\"%s\" next_id=0x%08x client=\"%s\"",ad->id,ad->filename,ad->extensiontag,ad->delay,ad->link,ad->next,ad->client?client:"");
    return ad;
}


static int adbanner_destroy(t_adbanner const * ad)
{
    if (!ad)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
        return -1;
    }
    
    xfree((void *)ad->filename); /* avoid warning */
    xfree((void *)ad->link); /* avoid warning */
    xfree((void *)ad); /* avoid warning */
    
    return 0;
}

extern t_adbanner * adbanner_get(t_connection const * c, unsigned int id)
{
  t_adbanner * banner;
  t_clienttag ctag = conn_get_clienttag(c);

  banner = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,id,ctag);
  if (!banner) banner = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,id,ctag);
  if (!banner) banner = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,id,ctag);

  return banner;
}

extern t_adbanner * adbanner_pick(t_connection const * c, unsigned int prev_id)
{
    t_adbanner const * prev;
    unsigned int       next_id;
    t_clienttag ctag;
    
    if (!c)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return NULL;
    }

    ctag = conn_get_clienttag(c);

    /* eventlog(eventlog_level_debug,__FUNCTION__,"prev_id=%u init_count=%u start_count=%u norm_count=%u",prev_id,adbannerlist_init_count,adbannerlist_start_count,adbannerlist_norm_count); */
    /* if this is the first ad, randomly choose an init sequence (if there is one) */
    if (prev_id==0 && adbannerlist_init_count>0)
        return adbannerlist_get_random(adbannerlist_init_head,ctag);
//        return list_get_data_by_pos(adbannerlist_init_head,((unsigned int)rand())%adbannerlist_init_count);
    /* eventlog(eventlog_level_debug,__FUNCTION__,"not sending init banner"); */
    
    /* find the previous adbanner */
    if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,prev_id,ctag)))
        next_id = prev->next;
    else if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,prev_id,ctag)))
        next_id = prev->next;
    else if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,prev_id,ctag)))
        next_id = prev->next;
    else
        next_id = 0;
    
    /* return its next ad if there is one */
    if (next_id)
    {
        t_adbanner * curr;
        
        if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,next_id,ctag)))
            return curr;
        if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,next_id,ctag)))
            return curr;
        if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,next_id,ctag)))
            return curr;
        
        eventlog(eventlog_level_error,__FUNCTION__,"could not locate next requested ad with id 0x%06x",next_id);
    }
    /* eventlog(eventlog_level_debug,__FUNCTION__,"not sending next banner"); */
    
    /* otherwise choose another starting point randomly */
    if (adbannerlist_start_count>0)
        return adbannerlist_get_random(adbannerlist_start_head,ctag);

    /* eventlog(eventlog_level_debug,__FUNCTION__,"not sending start banner... nothing to return"); */
    return NULL; /* nothing else to return */
}


extern unsigned int adbanner_get_id(t_adbanner const * ad)
{
    if (!ad)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
        return 0;
    }
    return ad->id;
}


extern unsigned int adbanner_get_extensiontag(t_adbanner const * ad)
{
    if (!ad)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
        return 0;
    }
    return ad->extensiontag;
}


extern char const * adbanner_get_filename(t_adbanner const * ad)
{
    if (!ad)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
        return NULL;
    }
    return ad->filename;
}


extern char const * adbanner_get_link(t_adbanner const * ad)
{
    if (!ad)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
        return NULL;
    }
    return ad->link;
}


extern t_clienttag adbanner_get_client(t_adbanner const * ad)
{
    if (!ad)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
        return CLIENTTAG_UNKNOWN_UINT;
    }
    return ad->client;
}


static t_adbanner * adbannerlist_find_adbanner_by_id(t_list const * head, unsigned int id, t_clienttag clienttag)
{
    t_elem const * curr;
    t_adbanner *   temp;
    
    if (!head)
        return NULL;
    
    LIST_TRAVERSE_CONST(head,curr)
    {
        if (!(temp = elem_get_data(curr)))
        {
            eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in list");
            continue;
        }
        if (temp->id==id && (temp->client == 0 || temp->client == clienttag))
            return temp;
    }
    
    return NULL;
}

/*
 * Dizzy: maybe we should use a temporary list, right now we parse the list for
 * 2 times. It should not matter for servers without more than 20 ads :)
*/
static t_adbanner * adbannerlist_get_random(t_list const * head, t_clienttag client)
{
    t_elem const * curr;
    t_adbanner *   temp;
    unsigned int ccount, ocount, pos;

    if (!head)
        return NULL;

    ocount = 0; ccount = 0;
    LIST_TRAVERSE_CONST(head,curr)
    {
        if (!(temp = elem_get_data(curr)))
        {
            eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in list");
            continue;
        }
        if ((adbanner_get_client(temp) == client))
            ccount++;
        else if ((adbanner_get_client(temp) == 0))
            ocount++;
    }
    if (ccount) {
        pos = ((unsigned int)rand())%ccount;
        ccount = 0;
        LIST_TRAVERSE_CONST(head,curr)
        {
            if (!(temp = elem_get_data(curr))) continue;
            if ((adbanner_get_client(temp) == client))
                if (ccount++ == pos) return temp;
        }
        eventlog(eventlog_level_error,__FUNCTION__,"found client ads but couldnt locate random chosed!");
    } else if (ocount) {
        pos = ((unsigned int)rand())%ocount;
        ocount = 0;
        LIST_TRAVERSE_CONST(head,curr)
        {
            if (!(temp = elem_get_data(curr))) continue;
            if ((adbanner_get_client(temp) == 0))
                if (ocount++ == pos) return temp; 
        }
        eventlog(eventlog_level_error,__FUNCTION__,"couldnt locate random chosed!");
    }

    return NULL;
}


static int adbannerlist_insert(t_list * head, unsigned int * count, char const * filename, unsigned int delay, char const * link, unsigned int next_id, char const * client)
{
    t_adbanner * ad;
    unsigned int id;
    char *       ext;
    bn_int       bntag;
    
    assert(head != NULL);
    assert(count != NULL);
    assert(filename != NULL);
    assert(link != NULL);

    if (strlen(filename)<7)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got bad ad filename \"%s\"",filename);
        return -1;
    }
    
    ext = xmalloc(strlen(filename));
    
    if (sscanf(filename,"%*c%*c%x.%s",&id,ext)!=2)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got bad ad filename \"%s\"",filename);
        xfree(ext);
        return -1;
    }
    
    if (strcasecmp(ext,"pcx")==0)
        bn_int_tag_set(&bntag,EXTENSIONTAG_PCX);
    else if (strcasecmp(ext,"mng")==0)
        bn_int_tag_set(&bntag,EXTENSIONTAG_MNG);
    else if (strcasecmp(ext,"smk")==0)
        bn_int_tag_set(&bntag,EXTENSIONTAG_SMK);
    else
    {
        eventlog(eventlog_level_error,__FUNCTION__,"unknown extension on filename \"%s\"",filename);
        xfree(ext);
        return -1;
    }
    xfree(ext);
    
    if (!(ad = adbanner_create(id,next_id,delay,bntag,filename,link,client)))
    {
        eventlog(eventlog_level_error,__FUNCTION__,"could not create ad");
        return -1;
    }
    
    list_prepend_data(head,ad);

    (*count)++;
    
    return 0;
}


extern int adbannerlist_create(char const * filename)
{
    FILE *          fp;
    unsigned int    line;
    unsigned int    pos;
    unsigned int    len;
    char *          buff;
    char *          name;
    char *          when;
    char *          link;
    char *          client;
    char *          temp;
    unsigned int    delay;
    unsigned int    next_id;
    
    if (!filename)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL filename");
        return -1;
    }
    
    adbannerlist_init_head = list_create();
    adbannerlist_start_head = list_create();
    adbannerlist_norm_head = list_create();
    
    if (!(fp = fopen(filename,"r")))
    {
        eventlog(eventlog_level_error,__FUNCTION__,"could not open adbanner file \"%s\" for reading (fopen: %s)",filename,pstrerror(errno));
        list_destroy(adbannerlist_norm_head);
        list_destroy(adbannerlist_start_head);
        list_destroy(adbannerlist_init_head);
        adbannerlist_init_head=adbannerlist_start_head=adbannerlist_norm_head = NULL;
        return -1;
    }
    
    for (line=1; (buff = file_get_line(fp)); line++)
    {
        for (pos=0; buff[pos]=='\t' || buff[pos]==' '; pos++);
        if (buff[pos]=='\0' || buff[pos]=='#')
        {
            continue;
        }
        if ((temp = strrchr(buff,'#')))
        {
            unsigned int endpos;
            
            *temp = '\0';
            len = strlen(buff)+1;
            for (endpos=len-1;  buff[endpos]=='\t' || buff[endpos]==' '; endpos--);
            buff[endpos+1] = '\0';
        }
        len = strlen(buff)+1;

        name = xmalloc(len);
        when = xmalloc(len);
        link = xmalloc(len);
        client = xmalloc(len);
        
        if (sscanf(buff," \"%[^\"]\" %[a-z] %u \"%[^\"]\" %x \"%[^\"]\"",name,when,&delay,link,&next_id,client)!=6)
            {
                eventlog(eventlog_level_error,__FUNCTION__,"malformed line %u in file \"%s\"",line,filename);
                xfree(client);
                xfree(link);
                xfree(name);
                xfree(when);
                continue;
            }
        
        if (strcmp(when,"init")==0)
            adbannerlist_insert(adbannerlist_init_head,&adbannerlist_init_count,name,delay,link,next_id,client);
        else if (strcmp(when,"start")==0)
            adbannerlist_insert(adbannerlist_start_head,&adbannerlist_start_count,name,delay,link,next_id,client);
        else if (strcmp(when,"norm")==0)
            adbannerlist_insert(adbannerlist_norm_head,&adbannerlist_norm_count,name,delay,link,next_id,client);
        else
            eventlog(eventlog_level_error,__FUNCTION__,"when field has unknown value on line %u in file \"%s\"",line,filename);
        
        xfree(client);
        xfree(link);
        xfree(name);
        xfree(when);
    }
    
    file_get_line(NULL); // clear file_get_line buffer
    if (fclose(fp)<0)
        eventlog(eventlog_level_error,__FUNCTION__,"could not close adbanner file \"%s\" after reading (fclose: %s)",filename,pstrerror(errno));
    return 0;
}


extern int adbannerlist_destroy(void)
{
    t_elem *     curr;
    t_adbanner * ad;
    
    if (adbannerlist_init_head)
    {
        LIST_TRAVERSE(adbannerlist_init_head,curr)
        {
            if (!(ad = elem_get_data(curr)))
                eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in init list");
            else
                adbanner_destroy(ad);
            list_remove_elem(adbannerlist_init_head,&curr);
        }
        list_destroy(adbannerlist_init_head);
        adbannerlist_init_head = NULL;
        adbannerlist_init_count = 0;
    }
    
    if (adbannerlist_start_head)
    {
        LIST_TRAVERSE(adbannerlist_start_head,curr)
        {
            if (!(ad = elem_get_data(curr)))
                eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in start list");
            else
                adbanner_destroy(ad);
            list_remove_elem(adbannerlist_start_head,&curr);
        }
        list_destroy(adbannerlist_start_head);
        adbannerlist_start_head = NULL;
        adbannerlist_start_count = 0;
    }
    
    if (adbannerlist_norm_head)
    {
        LIST_TRAVERSE(adbannerlist_norm_head,curr)
        {
            if (!(ad = elem_get_data(curr)))
                eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in norm list");
            else
                adbanner_destroy(ad);
            list_remove_elem(adbannerlist_norm_head,&curr);
        }
        list_destroy(adbannerlist_norm_head);
        adbannerlist_norm_head = NULL;
        adbannerlist_norm_count = 0;
    }
    
    return 0;
}
1	sysadm	1.1	/*
2			* Copyright (C) 1999 Ross Combs (rocombs@cs.nmsu.edu)
3			*
4			* This program is free software; you can redistribute it and/or
5			* modify it under the terms of the GNU General Public License
6			* as published by the Free Software Foundation; either version 2
7			* of the License, or (at your option) any later version.
8			*
9			* This program is distributed in the hope that it will be useful,
10			* but WITHOUT ANY WARRANTY; without even the implied warranty of
11			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12			* GNU General Public License for more details.
13			*
14			* You should have received a copy of the GNU General Public License
15			* along with this program; if not, write to the Free Software
16			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17			*/
18			#define ADBANNER_INTERNAL_ACCESS
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			#ifdef HAVE_ASSERT_H
43			# include <assert.h>
44			#endif
45			#include "compat/strrchr.h"
46			#include "compat/strdup.h"
47			#include "compat/strcasecmp.h"
48			#include <errno.h>
49			#include "compat/strerror.h"
50			#include "common/tag.h"
51			#include "common/bn_type.h"
52			#include "common/eventlog.h"
53			#include "common/list.h"
54			#include "common/util.h"
55			#include "common/xalloc.h"
56			#include "connection.h"
57			#include "adbanner.h"
58			#include "common/setup_after.h"
59
60
61			static t_list * adbannerlist_init_head=NULL;
62			static t_list * adbannerlist_start_head=NULL;
63			static t_list * adbannerlist_norm_head=NULL;
64			static unsigned int adbannerlist_init_count=0;
65			static unsigned int adbannerlist_start_count=0;
66			static unsigned int adbannerlist_norm_count=0;
67
68
69			static t_adbanner * adbanner_create(unsigned int id, unsigned int next_id, unsigned int delay, bn_int tag, char const * filename, char const * link, char const * client);
70			static int adbanner_destroy(t_adbanner const * ad);
71			static int adbannerlist_insert(t_list * head, unsigned int * count, char const * filename, unsigned int delay, char const * link, unsigned int next_id, char const * client);
72			static t_adbanner * adbannerlist_find_adbanner_by_id(t_list const * head, unsigned int id, t_clienttag clienttag);
73			static t_adbanner * adbannerlist_get_random(t_list const * head, t_clienttag client);
74
75
76			static t_adbanner * adbanner_create(unsigned int id, unsigned int next_id, unsigned int delay, bn_int tag, char const * filename, char const * link, char const * client)
77			{
78			t_adbanner * ad;
79
80			if (!filename)
81			{
82			eventlog(eventlog_level_error,__FUNCTION__,"got NULL filename");
83			return NULL;
84			}
85			if (!link)
86			{
87			eventlog(eventlog_level_error,__FUNCTION__,"got NULL link");
88			return NULL;
89			}
90			if (!client)
91			{
92			eventlog(eventlog_level_error,__FUNCTION__,"got NULL client");
93			return NULL;
94			}
95
96			ad = xmalloc(sizeof(t_adbanner));
97
98			ad->id = id;
99			ad->extensiontag = bn_int_get(tag);
100			ad->delay = delay;
101			ad->next = next_id;
102			ad->filename = xstrdup(filename);
103			ad->link = xstrdup(link);
104
105			if (strcasecmp(client,"NULL")==0)
106			ad->client = 0;
107			else
108			ad->client = clienttag_str_to_uint(client);
109
110			/* I'm aware that this statement looks stupid */
111			if (ad->client && (!tag_check_client(ad->client)))
112			{
113			eventlog(eventlog_level_error,__FUNCTION__,"banner with invalid clienttag \"%s\"encountered",client);
114			xfree((void *)ad->link);
115			xfree((void )ad->filename); / avoid warning */
116			xfree(ad);
117			return NULL;
118			}
119
120
121			eventlog(eventlog_level_debug,__FUNCTION__,"created ad id=0x%08x filename=\"%s\" extensiontag=0x%04x delay=%u link=\"%s\" next_id=0x%08x client=\"%s\"",ad->id,ad->filename,ad->extensiontag,ad->delay,ad->link,ad->next,ad->client?client:"");
122			return ad;
123			}
124
125
126			static int adbanner_destroy(t_adbanner const * ad)
127			{
128			if (!ad)
129			{
130			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
131			return -1;
132			}
133
134			xfree((void )ad->filename); / avoid warning */
135			xfree((void )ad->link); / avoid warning */
136			xfree((void )ad); / avoid warning */
137
138			return 0;
139			}
140
141			extern t_adbanner * adbanner_get(t_connection const * c, unsigned int id)
142			{
143			t_adbanner * banner;
144			t_clienttag ctag = conn_get_clienttag(c);
145
146			banner = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,id,ctag);
147			if (!banner) banner = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,id,ctag);
148			if (!banner) banner = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,id,ctag);
149
150			return banner;
151			}
152
153			extern t_adbanner * adbanner_pick(t_connection const * c, unsigned int prev_id)
154			{
155			t_adbanner const * prev;
156			unsigned int next_id;
157			t_clienttag ctag;
158
159			if (!c)
160			{
161			eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
162			return NULL;
163			}
164
165			ctag = conn_get_clienttag(c);
166
167			/* eventlog(eventlog_level_debug,__FUNCTION__,"prev_id=%u init_count=%u start_count=%u norm_count=%u",prev_id,adbannerlist_init_count,adbannerlist_start_count,adbannerlist_norm_count); */
168			/* if this is the first ad, randomly choose an init sequence (if there is one) */
169			if (prev_id==0 && adbannerlist_init_count>0)
170			return adbannerlist_get_random(adbannerlist_init_head,ctag);
171			// return list_get_data_by_pos(adbannerlist_init_head,((unsigned int)rand())%adbannerlist_init_count);
172			/* eventlog(eventlog_level_debug,__FUNCTION__,"not sending init banner"); */
173
174			/* find the previous adbanner */
175			if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,prev_id,ctag)))
176			next_id = prev->next;
177			else if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,prev_id,ctag)))
178			next_id = prev->next;
179			else if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,prev_id,ctag)))
180			next_id = prev->next;
181			else
182			next_id = 0;
183
184			/* return its next ad if there is one */
185			if (next_id)
186			{
187			t_adbanner * curr;
188
189			if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,next_id,ctag)))
190			return curr;
191			if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,next_id,ctag)))
192			return curr;
193			if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,next_id,ctag)))
194			return curr;
195
196			eventlog(eventlog_level_error,__FUNCTION__,"could not locate next requested ad with id 0x%06x",next_id);
197			}
198			/* eventlog(eventlog_level_debug,__FUNCTION__,"not sending next banner"); */
199
200			/* otherwise choose another starting point randomly */
201			if (adbannerlist_start_count>0)
202			return adbannerlist_get_random(adbannerlist_start_head,ctag);
203
204			/* eventlog(eventlog_level_debug,__FUNCTION__,"not sending start banner... nothing to return"); */
205			return NULL; /* nothing else to return */
206			}
207
208
209			extern unsigned int adbanner_get_id(t_adbanner const * ad)
210			{
211			if (!ad)
212			{
213			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
214			return 0;
215			}
216			return ad->id;
217			}
218
219
220			extern unsigned int adbanner_get_extensiontag(t_adbanner const * ad)
221			{
222			if (!ad)
223			{
224			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
225			return 0;
226			}
227			return ad->extensiontag;
228			}
229
230
231			extern char const * adbanner_get_filename(t_adbanner const * ad)
232			{
233			if (!ad)
234			{
235			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
236			return NULL;
237			}
238			return ad->filename;
239			}
240
241
242			extern char const * adbanner_get_link(t_adbanner const * ad)
243			{
244			if (!ad)
245			{
246			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
247			return NULL;
248			}
249			return ad->link;
250			}
251
252
253			extern t_clienttag adbanner_get_client(t_adbanner const * ad)
254			{
255			if (!ad)
256			{
257			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
258			return CLIENTTAG_UNKNOWN_UINT;
259			}
260			return ad->client;
261			}
262
263
264			static t_adbanner * adbannerlist_find_adbanner_by_id(t_list const * head, unsigned int id, t_clienttag clienttag)
265			{
266			t_elem const * curr;
267			t_adbanner * temp;
268
269			if (!head)
270			return NULL;
271
272			LIST_TRAVERSE_CONST(head,curr)
273			{
274			if (!(temp = elem_get_data(curr)))
275			{
276			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in list");
277			continue;
278			}
279			if (temp->id==id && (temp->client == 0 \|\| temp->client == clienttag))
280			return temp;
281			}
282
283			return NULL;
284			}
285
286			/*
287			* Dizzy: maybe we should use a temporary list, right now we parse the list for
288			* 2 times. It should not matter for servers without more than 20 ads :)
289			*/
290			static t_adbanner * adbannerlist_get_random(t_list const * head, t_clienttag client)
291			{
292			t_elem const * curr;
293			t_adbanner * temp;
294			unsigned int ccount, ocount, pos;
295
296			if (!head)
297			return NULL;
298
299			ocount = 0; ccount = 0;
300			LIST_TRAVERSE_CONST(head,curr)
301			{
302			if (!(temp = elem_get_data(curr)))
303			{
304			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in list");
305			continue;
306			}
307			if ((adbanner_get_client(temp) == client))
308			ccount++;
309			else if ((adbanner_get_client(temp) == 0))
310			ocount++;
311			}
312			if (ccount) {
313			pos = ((unsigned int)rand())%ccount;
314			ccount = 0;
315			LIST_TRAVERSE_CONST(head,curr)
316			{
317			if (!(temp = elem_get_data(curr))) continue;
318			if ((adbanner_get_client(temp) == client))
319			if (ccount++ == pos) return temp;
320			}
321			eventlog(eventlog_level_error,__FUNCTION__,"found client ads but couldnt locate random chosed!");
322			} else if (ocount) {
323			pos = ((unsigned int)rand())%ocount;
324			ocount = 0;
325			LIST_TRAVERSE_CONST(head,curr)
326			{
327			if (!(temp = elem_get_data(curr))) continue;
328			if ((adbanner_get_client(temp) == 0))
329			if (ocount++ == pos) return temp;
330			}
331			eventlog(eventlog_level_error,__FUNCTION__,"couldnt locate random chosed!");
332			}
333
334			return NULL;
335			}
336
337
338			static int adbannerlist_insert(t_list * head, unsigned int * count, char const * filename, unsigned int delay, char const * link, unsigned int next_id, char const * client)
339			{
340			t_adbanner * ad;
341			unsigned int id;
342			char * ext;
343			bn_int bntag;
344
345			assert(head != NULL);
346			assert(count != NULL);
347			assert(filename != NULL);
348			assert(link != NULL);
349
350			if (strlen(filename)<7)
351			{
352			eventlog(eventlog_level_error,__FUNCTION__,"got bad ad filename \"%s\"",filename);
353			return -1;
354			}
355
356			ext = xmalloc(strlen(filename));
357
358			if (sscanf(filename,"%c%c%x.%s",&id,ext)!=2)
359			{
360			eventlog(eventlog_level_error,__FUNCTION__,"got bad ad filename \"%s\"",filename);
361			xfree(ext);
362			return -1;
363			}
364
365			if (strcasecmp(ext,"pcx")==0)
366			bn_int_tag_set(&bntag,EXTENSIONTAG_PCX);
367			else if (strcasecmp(ext,"mng")==0)
368			bn_int_tag_set(&bntag,EXTENSIONTAG_MNG);
369			else if (strcasecmp(ext,"smk")==0)
370			bn_int_tag_set(&bntag,EXTENSIONTAG_SMK);
371			else
372			{
373			eventlog(eventlog_level_error,__FUNCTION__,"unknown extension on filename \"%s\"",filename);
374			xfree(ext);
375			return -1;
376			}
377			xfree(ext);
378
379			if (!(ad = adbanner_create(id,next_id,delay,bntag,filename,link,client)))
380			{
381			eventlog(eventlog_level_error,__FUNCTION__,"could not create ad");
382			return -1;
383			}
384
385			list_prepend_data(head,ad);
386
387			(*count)++;
388
389			return 0;
390			}
391
392
393			extern int adbannerlist_create(char const * filename)
394			{
395			FILE * fp;
396			unsigned int line;
397			unsigned int pos;
398			unsigned int len;
399			char * buff;
400			char * name;
401			char * when;
402			char * link;
403			char * client;
404			char * temp;
405			unsigned int delay;
406			unsigned int next_id;
407
408			if (!filename)
409			{
410			eventlog(eventlog_level_error,__FUNCTION__,"got NULL filename");
411			return -1;
412			}
413
414			adbannerlist_init_head = list_create();
415			adbannerlist_start_head = list_create();
416			adbannerlist_norm_head = list_create();
417
418			if (!(fp = fopen(filename,"r")))
419			{
420			eventlog(eventlog_level_error,__FUNCTION__,"could not open adbanner file \"%s\" for reading (fopen: %s)",filename,pstrerror(errno));
421			list_destroy(adbannerlist_norm_head);
422			list_destroy(adbannerlist_start_head);
423			list_destroy(adbannerlist_init_head);
424			adbannerlist_init_head=adbannerlist_start_head=adbannerlist_norm_head = NULL;
425			return -1;
426			}
427
428			for (line=1; (buff = file_get_line(fp)); line++)
429			{
430			for (pos=0; buff[pos]=='\t' \|\| buff[pos]==' '; pos++);
431			if (buff[pos]=='\0' \|\| buff[pos]=='#')
432			{
433			continue;
434			}
435			if ((temp = strrchr(buff,'#')))
436			{
437			unsigned int endpos;
438
439			*temp = '\0';
440			len = strlen(buff)+1;
441			for (endpos=len-1; buff[endpos]=='\t' \|\| buff[endpos]==' '; endpos--);
442			buff[endpos+1] = '\0';
443			}
444			len = strlen(buff)+1;
445
446			name = xmalloc(len);
447			when = xmalloc(len);
448			link = xmalloc(len);
449			client = xmalloc(len);
450
451			if (sscanf(buff," \"%[^\"]\" %[a-z] %u \"%[^\"]\" %x \"%[^\"]\"",name,when,&delay,link,&next_id,client)!=6)
452			{
453			eventlog(eventlog_level_error,__FUNCTION__,"malformed line %u in file \"%s\"",line,filename);
454			xfree(client);
455			xfree(link);
456			xfree(name);
457			xfree(when);
458			continue;
459			}
460
461			if (strcmp(when,"init")==0)
462			adbannerlist_insert(adbannerlist_init_head,&adbannerlist_init_count,name,delay,link,next_id,client);
463			else if (strcmp(when,"start")==0)
464			adbannerlist_insert(adbannerlist_start_head,&adbannerlist_start_count,name,delay,link,next_id,client);
465			else if (strcmp(when,"norm")==0)
466			adbannerlist_insert(adbannerlist_norm_head,&adbannerlist_norm_count,name,delay,link,next_id,client);
467			else
468			eventlog(eventlog_level_error,__FUNCTION__,"when field has unknown value on line %u in file \"%s\"",line,filename);
469
470			xfree(client);
471			xfree(link);
472			xfree(name);
473			xfree(when);
474			}
475
476			file_get_line(NULL); // clear file_get_line buffer
477			if (fclose(fp)<0)
478			eventlog(eventlog_level_error,__FUNCTION__,"could not close adbanner file \"%s\" after reading (fclose: %s)",filename,pstrerror(errno));
479			return 0;
480			}
481
482
483			extern int adbannerlist_destroy(void)
484			{
485			t_elem * curr;
486			t_adbanner * ad;
487
488			if (adbannerlist_init_head)
489			{
490			LIST_TRAVERSE(adbannerlist_init_head,curr)
491			{
492			if (!(ad = elem_get_data(curr)))
493			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in init list");
494			else
495			adbanner_destroy(ad);
496			list_remove_elem(adbannerlist_init_head,&curr);
497			}
498			list_destroy(adbannerlist_init_head);
499			adbannerlist_init_head = NULL;
500			adbannerlist_init_count = 0;
501			}
502
503			if (adbannerlist_start_head)
504			{
505			LIST_TRAVERSE(adbannerlist_start_head,curr)
506			{
507			if (!(ad = elem_get_data(curr)))
508			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in start list");
509			else
510			adbanner_destroy(ad);
511			list_remove_elem(adbannerlist_start_head,&curr);
512			}
513			list_destroy(adbannerlist_start_head);
514			adbannerlist_start_head = NULL;
515			adbannerlist_start_count = 0;
516			}
517
518			if (adbannerlist_norm_head)
519			{
520			LIST_TRAVERSE(adbannerlist_norm_head,curr)
521			{
522			if (!(ad = elem_get_data(curr)))
523			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in norm list");
524			else
525			adbanner_destroy(ad);
526			list_remove_elem(adbannerlist_norm_head,&curr);
527			}
528			list_destroy(adbannerlist_norm_head);
529			adbannerlist_norm_head = NULL;
530			adbannerlist_norm_count = 0;
531			}
532
533			return 0;
534			}
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