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);

        /* sowater, 2005-04-14 */
        if(ctag=clienttag_str_to_uint("D2XP")) {
                char checknum;
                unsigned int id=0;
                t_connection const * t=c;
                t_adbanner * adbanner_checknum;
                checknum=conn_get_checknum(t);
                id|=checknum;
                eventlog(eventlog_level_debug,__FUNCTION__,"got checknum: %c, banner id: %u",checknum,id);
                if(adbanner_checknum=adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,id,ctag)) 
                        return adbanner_checknum;
                eventlog(eventlog_level_debug,__FUNCTION__,"not sending checknum banner");
                return NULL;
        }else{
    
    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	sysadm	1.2
160	sysadm	1.1	if (!c)
161			{
162			eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
163			return NULL;
164			}
165
166			ctag = conn_get_clienttag(c);
167
168	sysadm	1.2	/* sowater, 2005-04-14 */
169			if(ctag=clienttag_str_to_uint("D2XP")) {
170			char checknum;
171			unsigned int id=0;
172			t_connection const * t=c;
173			t_adbanner * adbanner_checknum;
174			checknum=conn_get_checknum(t);
175			id\|=checknum;
176			eventlog(eventlog_level_debug,__FUNCTION__,"got checknum: %c, banner id: %u",checknum,id);
177			if(adbanner_checknum=adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,id,ctag))
178			return adbanner_checknum;
179			eventlog(eventlog_level_debug,__FUNCTION__,"not sending checknum banner");
180			return NULL;
181			}else{
182
183			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);
184	sysadm	1.1	/* if this is the first ad, randomly choose an init sequence (if there is one) */
185			if (prev_id==0 && adbannerlist_init_count>0)
186			return adbannerlist_get_random(adbannerlist_init_head,ctag);
187			// return list_get_data_by_pos(adbannerlist_init_head,((unsigned int)rand())%adbannerlist_init_count);
188	sysadm	1.2	eventlog(eventlog_level_debug,__FUNCTION__,"not sending init banner");
189	sysadm	1.1
190			/* find the previous adbanner */
191			if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,prev_id,ctag)))
192			next_id = prev->next;
193			else if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,prev_id,ctag)))
194			next_id = prev->next;
195			else if ((prev = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,prev_id,ctag)))
196			next_id = prev->next;
197			else
198			next_id = 0;
199
200			/* return its next ad if there is one */
201			if (next_id)
202			{
203			t_adbanner * curr;
204
205			if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_init_head,next_id,ctag)))
206			return curr;
207			if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_start_head,next_id,ctag)))
208			return curr;
209			if ((curr = adbannerlist_find_adbanner_by_id(adbannerlist_norm_head,next_id,ctag)))
210			return curr;
211
212			eventlog(eventlog_level_error,__FUNCTION__,"could not locate next requested ad with id 0x%06x",next_id);
213			}
214			/* eventlog(eventlog_level_debug,__FUNCTION__,"not sending next banner"); */
215
216			/* otherwise choose another starting point randomly */
217			if (adbannerlist_start_count>0)
218			return adbannerlist_get_random(adbannerlist_start_head,ctag);
219
220	sysadm	1.2	eventlog(eventlog_level_debug,__FUNCTION__,"not sending start banner... nothing to return");
221	sysadm	1.1	return NULL; /* nothing else to return */
222	sysadm	1.2
223			}
224	sysadm	1.1	}
225
226
227			extern unsigned int adbanner_get_id(t_adbanner const * ad)
228			{
229			if (!ad)
230			{
231			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
232			return 0;
233			}
234			return ad->id;
235			}
236
237
238			extern unsigned int adbanner_get_extensiontag(t_adbanner const * ad)
239			{
240			if (!ad)
241			{
242			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
243			return 0;
244			}
245			return ad->extensiontag;
246			}
247
248
249			extern char const * adbanner_get_filename(t_adbanner const * ad)
250			{
251			if (!ad)
252			{
253			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
254			return NULL;
255			}
256			return ad->filename;
257			}
258
259
260			extern char const * adbanner_get_link(t_adbanner const * ad)
261			{
262			if (!ad)
263			{
264			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
265			return NULL;
266			}
267			return ad->link;
268			}
269
270
271			extern t_clienttag adbanner_get_client(t_adbanner const * ad)
272			{
273			if (!ad)
274			{
275			eventlog(eventlog_level_error,__FUNCTION__,"got NULL ad");
276			return CLIENTTAG_UNKNOWN_UINT;
277			}
278			return ad->client;
279			}
280
281
282			static t_adbanner * adbannerlist_find_adbanner_by_id(t_list const * head, unsigned int id, t_clienttag clienttag)
283			{
284			t_elem const * curr;
285			t_adbanner * temp;
286
287			if (!head)
288			return NULL;
289
290			LIST_TRAVERSE_CONST(head,curr)
291			{
292			if (!(temp = elem_get_data(curr)))
293			{
294			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in list");
295			continue;
296			}
297			if (temp->id==id && (temp->client == 0 \|\| temp->client == clienttag))
298			return temp;
299			}
300
301			return NULL;
302			}
303
304			/*
305			* Dizzy: maybe we should use a temporary list, right now we parse the list for
306			* 2 times. It should not matter for servers without more than 20 ads :)
307			*/
308			static t_adbanner * adbannerlist_get_random(t_list const * head, t_clienttag client)
309			{
310			t_elem const * curr;
311			t_adbanner * temp;
312			unsigned int ccount, ocount, pos;
313
314			if (!head)
315			return NULL;
316
317			ocount = 0; ccount = 0;
318			LIST_TRAVERSE_CONST(head,curr)
319			{
320			if (!(temp = elem_get_data(curr)))
321			{
322			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in list");
323			continue;
324			}
325			if ((adbanner_get_client(temp) == client))
326			ccount++;
327			else if ((adbanner_get_client(temp) == 0))
328			ocount++;
329			}
330			if (ccount) {
331			pos = ((unsigned int)rand())%ccount;
332			ccount = 0;
333			LIST_TRAVERSE_CONST(head,curr)
334			{
335			if (!(temp = elem_get_data(curr))) continue;
336			if ((adbanner_get_client(temp) == client))
337			if (ccount++ == pos) return temp;
338			}
339			eventlog(eventlog_level_error,__FUNCTION__,"found client ads but couldnt locate random chosed!");
340			} else if (ocount) {
341			pos = ((unsigned int)rand())%ocount;
342			ocount = 0;
343			LIST_TRAVERSE_CONST(head,curr)
344			{
345			if (!(temp = elem_get_data(curr))) continue;
346			if ((adbanner_get_client(temp) == 0))
347			if (ocount++ == pos) return temp;
348			}
349			eventlog(eventlog_level_error,__FUNCTION__,"couldnt locate random chosed!");
350			}
351
352			return NULL;
353			}
354
355
356			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)
357			{
358			t_adbanner * ad;
359			unsigned int id;
360			char * ext;
361			bn_int bntag;
362
363			assert(head != NULL);
364			assert(count != NULL);
365			assert(filename != NULL);
366			assert(link != NULL);
367
368			if (strlen(filename)<7)
369			{
370			eventlog(eventlog_level_error,__FUNCTION__,"got bad ad filename \"%s\"",filename);
371			return -1;
372			}
373
374			ext = xmalloc(strlen(filename));
375
376			if (sscanf(filename,"%c%c%x.%s",&id,ext)!=2)
377			{
378			eventlog(eventlog_level_error,__FUNCTION__,"got bad ad filename \"%s\"",filename);
379			xfree(ext);
380			return -1;
381			}
382
383			if (strcasecmp(ext,"pcx")==0)
384			bn_int_tag_set(&bntag,EXTENSIONTAG_PCX);
385			else if (strcasecmp(ext,"mng")==0)
386			bn_int_tag_set(&bntag,EXTENSIONTAG_MNG);
387			else if (strcasecmp(ext,"smk")==0)
388			bn_int_tag_set(&bntag,EXTENSIONTAG_SMK);
389			else
390			{
391			eventlog(eventlog_level_error,__FUNCTION__,"unknown extension on filename \"%s\"",filename);
392			xfree(ext);
393			return -1;
394			}
395			xfree(ext);
396
397			if (!(ad = adbanner_create(id,next_id,delay,bntag,filename,link,client)))
398			{
399			eventlog(eventlog_level_error,__FUNCTION__,"could not create ad");
400			return -1;
401			}
402
403			list_prepend_data(head,ad);
404
405			(*count)++;
406
407			return 0;
408			}
409
410
411			extern int adbannerlist_create(char const * filename)
412			{
413			FILE * fp;
414			unsigned int line;
415			unsigned int pos;
416			unsigned int len;
417			char * buff;
418			char * name;
419			char * when;
420			char * link;
421			char * client;
422			char * temp;
423			unsigned int delay;
424			unsigned int next_id;
425
426			if (!filename)
427			{
428			eventlog(eventlog_level_error,__FUNCTION__,"got NULL filename");
429			return -1;
430			}
431
432			adbannerlist_init_head = list_create();
433			adbannerlist_start_head = list_create();
434			adbannerlist_norm_head = list_create();
435
436			if (!(fp = fopen(filename,"r")))
437			{
438			eventlog(eventlog_level_error,__FUNCTION__,"could not open adbanner file \"%s\" for reading (fopen: %s)",filename,pstrerror(errno));
439			list_destroy(adbannerlist_norm_head);
440			list_destroy(adbannerlist_start_head);
441			list_destroy(adbannerlist_init_head);
442			adbannerlist_init_head=adbannerlist_start_head=adbannerlist_norm_head = NULL;
443			return -1;
444			}
445
446			for (line=1; (buff = file_get_line(fp)); line++)
447			{
448			for (pos=0; buff[pos]=='\t' \|\| buff[pos]==' '; pos++);
449			if (buff[pos]=='\0' \|\| buff[pos]=='#')
450			{
451			continue;
452			}
453			if ((temp = strrchr(buff,'#')))
454			{
455			unsigned int endpos;
456
457			*temp = '\0';
458			len = strlen(buff)+1;
459			for (endpos=len-1; buff[endpos]=='\t' \|\| buff[endpos]==' '; endpos--);
460			buff[endpos+1] = '\0';
461			}
462			len = strlen(buff)+1;
463
464			name = xmalloc(len);
465			when = xmalloc(len);
466			link = xmalloc(len);
467			client = xmalloc(len);
468
469			if (sscanf(buff," \"%[^\"]\" %[a-z] %u \"%[^\"]\" %x \"%[^\"]\"",name,when,&delay,link,&next_id,client)!=6)
470			{
471			eventlog(eventlog_level_error,__FUNCTION__,"malformed line %u in file \"%s\"",line,filename);
472			xfree(client);
473			xfree(link);
474			xfree(name);
475			xfree(when);
476			continue;
477			}
478
479			if (strcmp(when,"init")==0)
480			adbannerlist_insert(adbannerlist_init_head,&adbannerlist_init_count,name,delay,link,next_id,client);
481			else if (strcmp(when,"start")==0)
482			adbannerlist_insert(adbannerlist_start_head,&adbannerlist_start_count,name,delay,link,next_id,client);
483			else if (strcmp(when,"norm")==0)
484			adbannerlist_insert(adbannerlist_norm_head,&adbannerlist_norm_count,name,delay,link,next_id,client);
485			else
486			eventlog(eventlog_level_error,__FUNCTION__,"when field has unknown value on line %u in file \"%s\"",line,filename);
487
488			xfree(client);
489			xfree(link);
490			xfree(name);
491			xfree(when);
492			}
493
494			file_get_line(NULL); // clear file_get_line buffer
495			if (fclose(fp)<0)
496			eventlog(eventlog_level_error,__FUNCTION__,"could not close adbanner file \"%s\" after reading (fclose: %s)",filename,pstrerror(errno));
497			return 0;
498			}
499
500
501			extern int adbannerlist_destroy(void)
502			{
503			t_elem * curr;
504			t_adbanner * ad;
505
506			if (adbannerlist_init_head)
507			{
508			LIST_TRAVERSE(adbannerlist_init_head,curr)
509			{
510			if (!(ad = elem_get_data(curr)))
511			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in init list");
512			else
513			adbanner_destroy(ad);
514			list_remove_elem(adbannerlist_init_head,&curr);
515			}
516			list_destroy(adbannerlist_init_head);
517			adbannerlist_init_head = NULL;
518			adbannerlist_init_count = 0;
519			}
520
521			if (adbannerlist_start_head)
522			{
523			LIST_TRAVERSE(adbannerlist_start_head,curr)
524			{
525			if (!(ad = elem_get_data(curr)))
526			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in start list");
527			else
528			adbanner_destroy(ad);
529			list_remove_elem(adbannerlist_start_head,&curr);
530			}
531			list_destroy(adbannerlist_start_head);
532			adbannerlist_start_head = NULL;
533			adbannerlist_start_count = 0;
534			}
535
536			if (adbannerlist_norm_head)
537			{
538			LIST_TRAVERSE(adbannerlist_norm_head,curr)
539			{
540			if (!(ad = elem_get_data(curr)))
541			eventlog(eventlog_level_error,__FUNCTION__,"found NULL adbanner in norm list");
542			else
543			adbanner_destroy(ad);
544			list_remove_elem(adbannerlist_norm_head,&curr);
545			}
546			list_destroy(adbannerlist_norm_head);
547			adbannerlist_norm_head = NULL;
548			adbannerlist_norm_count = 0;
549			}
550
551			return 0;
552			}
553	sysadm	1.2
554
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