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/*
* P3Scan v2.3.2
*
* (C) 2003-2005 by Jack S. Lai <laitcg@cox.net>
*
* It's intent is to provide a follow on program to POP3-Virusscan-Proxy 0.4
* by Folke Ashberg <folke@ashberg.de>.
*
* It is based upon his program but provides numerous changes to include
* scanning pop3 mail for spam, hardening the program, addaption to todays
* email environment, and many other changes.
*
* The initial release of p3scan includes patches made and submitted to the
* original project but were never incorporated. Please see the README for
* further information.
*
* 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
*
* This program is released under the GPL with the additional exemption that
* compiling, linking, and/or using OpenSSL is allowed."
* (http://www.openssl.org/support/faq.html#LEGAL2)
*
*/
#ifndef _P3SCAN_H
#define _P3SCAN_H
#include <syslog.h> /* do_log */
#include <arpa/inet.h> /* config */
#include "getline_ssl.h"
#define PROGNAME "P3Scan"
#define VERSION "2.3.2"
#define MAX_PSEUDO_ARGV 50
#define MESSAGE_NOVIRINFO "<no virusinfo could be examined>"
#define FILEDEL "The infected message has been deleted."
#define SVRCMD "NOOP"
#define PERIOD "."
#define BOGUSX "X-P3Scan: Due to an extremely large attachment you see this message line."
#define NUL '\0'
#define LEN 65536 /* for substr() */
#define CONFIG_STATE_CMDPRE 1
#define CONFIG_STATE_FILE 2
#define CONFIG_STATE_CMD 3
#define SCANNER_INIT_NO 0
#define SCANNER_INIT_OK 1
#define SCANNER_INIT_NULL 2 /* scanner needs no init */
#define SCANNER_INIT_ERR -1
#define SCANNER_RET_OK 0
#define SCANNER_RET_ERR -1
#define SCANNER_RET_VIRUS 2
#define SCANNER_RET_CRIT 3
#define MAX_VIRUS_CODES 16
#if defined(__USE_FILE_OFFSET64) || defined(__USE_LARGEFILE64)
#define FSTAT(a, b) fstat64(a,b)
#define LSTAT(a, b) lstat64(a,b)
#define STAT(a, b) stat64(a,b)
#define stat_t stat64
#else
#define FSTAT(a, b) fstat(a,b)
#define LSTAT(a, b) lstat(a,b)
#define STAT(a, b) stat(a,b)
#define stat_t stat
#endif
#ifndef TMP_MAX
# define TMP_MAX 238328
#endif
#define SETIFNULL(a,b) if (!a) a=b /* wow, that's magic */
#define NONULL(x) ( x==NULL ? "" : x) /* this is nice, found in the mutt code */
#define TRIM(a) \
{ \
int len=0; \
while ((a)[len] && isspace((a)[len])) len++; \
memmove((a),&(a)[len], strlen(&(a)[len])+1); \
while ((len=strlen(a))>0 && isspace((a)[len-1])) (a)[len-1]='\0'; \
}
/* default configuration, anything can be changed at runtime */
#define LETTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
#define PORT_NUMBER 8110
#define SMTP_PORT 25
#define POP3_PORT 110
#define POP3SPORT 995
#define MAX_CHILDS 10
#define TIMEOUT 30
#define RUNAS_USER "mail"
#define VIRUS_DIR "/var/spool/p3scan"
#define ABORTFILE "/var/spool/p3scan/p3scan.abort"
#define NOTIFY_MAIL_DIR "/var/spool/p3scan/notify"
#define VIRUS_SCANNER NULL
#define VIRUS_SCANNER_VIRUSCODE 1
#define PID_FILE "/var/run/p3scan/p3scan.pid"
#define SYSLOG_NAME "p3scan"
#define CONFIGFILE "/etc/p3scan/p3scan.conf"
#define VIRUS_TEMPLATE "/etc/p3scan/p3scan.mail"
#define DEBUG 0
#define QUIET 0
#define OVERWRITE NULL
#define CHECKSPAM 0
#define SPAMCHECK "/usr/bin/spamc"
#define MINSPACE 10000
#define DELIT 0
#define SUBJECT "[Virus] found in a mail to you:"
#define NOTIFY "Per instruction, the message has been deleted."
#define SMTPRSET "Virus detected! P3scan rejected message!"
#define XMAIL "/bin/mail"
#define FOOTER "/etc/p3scan/p3scan.footer"
#define EXTRA "/etc/p3scan/p3scan.extra"
#define EMERGCON "root@localhost postmaster@localhost"
/* Defaut maximum mail size for scanning. ZERO for no limit! */
#define MAX_SIZE_SCAN 0
/* TOS: do not set, or use IPTOS_[LOWDELAY|THROUGHPUT|RELIABILITY|LOWCOST] */
#define SET_TOS IPTOS_THROUGHPUT
#define MOVEIT "/bin/mv"
#define COPYIT "/bin/cp"
#define POK "+OK"
#undef DEBUG_MEM /* print meminfo every log message when debugging */
#undef DEBUG_MESSAGE /* print message lines */
#undef DEBUG_SCANNING /* print message lines while scanning */
#undef DEBUG_FOOTER /* print virus scanner version info */
#undef DEBUG_SMTP /* print smtp messages lines */
/* undef this to not use the ripmime library
You also need to change the symlink for Makefile to the proper
Makefile. Either Makefile-ripmime or Makefile-noripmime */
#define DEMIME
/* print TIME with debug output */
#define DTIME
// Logging options defaults
#ifndef LOGOPT
#define LOGOPT LOG_PID|LOG_CONS
#endif
#ifndef LOGFAC
#define LOGFAC LOG_DAEMON
/* To log to file:
In the Makefile, change LOG_DAEMON to:
LOGFAC="LOG_LOCAL0"
or if not defined there, comment above and uncommment below.
Add to /etc/syslog.conf (and restart it):
local0.* -/var/log/p3scan
*/
//#define LOGFAC LOCAL0
#endif
/* default configuration ends here */
typedef struct proxycontext {
struct linebuf *serverbuf;
struct linebuf *clientbuf;
struct linebuf *hdrbuf;
struct sockaddr_in client_addr;
struct sockaddr_in server_addr;
struct hostent *server_host;
size_t socksize;
off_t hdroffset;
time_t now;
int client_fd;
int server_fd;
int header_fd;
int ismail;
unsigned int msgnum;
int header_exists;
int fakehdrdone;
int notified;
int noop;
int errmsg;
struct paramlist *params;
int mailcount;
unsigned long bytecount;
int gobogus;
int boguspos;
int hdrdate;
int hdrfrom;
int hdrto;
char mailfile[4096];
char maildir[4096]; /* mailfile.content */
char p3shdrfile[4096];
char cbuff[1];
char * filename;
char * scanthis; /* depending on demime linked to mailfile / maildir */
char * virinfo; /* has to be filled from the scanner */
char * filestatus; /* infected mail kept or deleted */
int scannerinit; /* see SCANNER_INIT_* */
char * extrasubj; /* extra notification subject line */
int cksmtp; /* if scanning an smtp submission */
int checksmtp; /* used to bypass checking for smtp */
int topping;
int posttop;
int usessl;
SSL * ssl;
SSL_CTX * ctx;
BIO * sbio;
char vnmsg[4096];
char * dspamuser;
char * actsvr;
int actport;
int extra;
} proxycontext;
typedef struct scanner_t {
char *name;
char *descr;
int (*init1)(void);
int (*init2)(struct proxycontext *);
int (*scan)(struct proxycontext *, char ** virname);
void (*uninit2)(struct proxycontext *);
void (*uninit1)(void);
int dirscan;
} scanner_t;
typedef struct configuration_t {
int maxchilds;
char * renattach;
char * runasuser;
char * virusdirbase;
char * virusdir;
char * notifydir;
char * virustemplate;
char * virusscanner;
int viruscode[MAX_VIRUS_CODES + 1];
int gvcode[MAX_VIRUS_CODES + 1];
char * virusregexp;
int virusregexpsub;
int demime;
char * pidfile;
char * syslogname;
char * configfile;
int debug;
char * overwrite;
struct sockaddr_in addr;
struct sockaddr_in targetaddr;
scanner_t * scanner;
int scannerenabled;
int quiet;
int checkspam;
char * spamcheck;
unsigned long freespace;
int delit;
int ispam;
int broken;
char * subject;
char * notify;
char * ispspam;
char * extra;
char * smtprset;
int smtpsize;
char * clamdserver;
char * clamdport;
int sslport;
char * mail;
int timeout;
char * footer;
int altemail;
int smtpport;
int enabletop;
int child;
int useurl;
char * emergcon;
char * emergency;
} configuration_t;
extern void do_log(int level, const char *fmt,...);
void context_uninit(struct proxycontext * p);
// The structure we use to maintain a list of allocated memory
typedef struct memory_list {
void *address;
size_t size;
struct memory_list *next;
struct memory_list *prev;
} memory_list;
// The global memory allocation list used by the memory management wrappers
memory_list *memory_list_head;
// The global couter indicating the number of bytes allocated
unsigned long global_memory_count;
// A one-time initialization function to setup the memory list and global memory count variables
void w_memory_init(void);
typedef void Sigfunc(int);
#endif
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