parse.c

100 病毒源碼,原始碼,無毒 ......

/*
** Modular Logfile Analyzer
** Copyright 2000 Jan Kneschke <[e-mail]>
**
** Homepage: http://www.kneschke.de/projekte/modlogan
**

    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, and provided that the above
    copyright and permission notice is included with all distributed
    copies of this or derived software.

    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

**
** $Id: parse.c,v 1.26 2001/01/11 22:34:14 jk Exp $
*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>

#include "config.h"

#ifdef HAVE_LIBADNS
#include <adns.h>
#endif

#include "mlocale.h"
#include "mplugins.h"
#include "mrecord.h"
#include "mdatatypes.h"
#include "misc.h"

#include "plugin_config.h"

const char *short_month[] = {	"Jan", "Feb", "Mar", "Apr", "May", "Jun", 
			"Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL};

int find_os (mconfig *ext_conf, char *str) {
	config_input *conf = ext_conf->input;
	mlist *l = conf->match_os;
	if (!str || !l) return 0;
	
	while (*str == ' ') str++;
	
	while (l) {
		data_Match *data = (data_Match *)l->data;
		
		if (data && strmatch(data->match, str)) {
#if 0
			printf("OS found: %s\n", str);
#endif
			return 1;
		}
		
		l = l->next;
	}
	
	return 0;
}

int find_ua (mconfig *ext_conf, char *str) {
	config_input *conf = ext_conf->input;
	mlist *l = conf->match_ua;
	if (!str || !l) return 0;
	
	while (*str == ' ') str++;
	
	while (l) {
		data_Match *data = (data_Match *)l->data;
		
		if (data && strmatch(data->match, str)) {
#if 0
			printf("UA found: %s\n", str);
#endif
			return 1;
		}
		
		l = l->next;
	}
	
	return 0;
}

int parse_timestamp(mconfig *ext_conf, const char *str, mlogrec *record) {
#define N 20 + 1
	int ovector[3 * N], n, i;
	char buf[10];
	struct tm tm;
	config_input *conf = ext_conf->input;
	
	if ((n = pcre_exec(conf->match_timestamp, conf->match_timestamp_extra, str, strlen(str), 0, 0, ovector, 3 * N)) < 0) {
		if (n == PCRE_ERROR_NOMATCH) {
			fprintf(stderr, "%s.%d: string doesn't match: %s\n", __FILE__, __LINE__, str);
		} else {
			fprintf(stderr, "%s.%d: execution error while matching: %d\n", __FILE__, __LINE__, n);
		}
		return -1;
	}
	
	/* everything has matched, take the different pieces and be happy :) */
	pcre_copy_substring(str, ovector, n, 1, buf, sizeof(buf));
	tm.tm_mday = strtol(buf, NULL, 10);
	
	pcre_copy_substring(str, ovector, n, 2, buf, sizeof(buf));
	for (i = 0; short_month[i];i++) {
		if (!strcmp(buf, short_month[i])) {
			tm.tm_mon = i;
		}
	}
	
	pcre_copy_substring(str, ovector, n, 3, buf, sizeof(buf));
	tm.tm_year = strtol(buf, NULL, 10)-1900;
	
	pcre_copy_substring(str, ovector, n, 4, buf, sizeof(buf));
	tm.tm_hour = strtol(buf, NULL, 10);
	pcre_copy_substring(str, ovector, n, 5, buf, sizeof(buf));
	tm.tm_min = strtol(buf, NULL, 10);
	pcre_copy_substring(str, ovector, n, 6, buf, sizeof(buf));
	tm.tm_sec = strtol(buf, NULL, 10);
	
	record->timestamp = mktime (&tm);
	
	return 0;
#undef  N
}

int parse_useragent(mconfig *ext_conf,const char *str, mlogrec_web_extclf *record) {
/* get user agent */
	char *pc1 = (char *)str, *pc3, *pc2 = (char *)str, *buf_copy;
	
	buf_copy = malloc(strlen(str)+1);
	strcpy(buf_copy, str);

	if ((pc3 = strchr(pc1, '(') )) {
		if (strstr(pc3, "compatible")) {
			int finished = 0;
			
			pc1 = pc2 = (pc3+1);
			
			while (!finished) {
				while (*pc2 && !(*pc2 == ';' || *pc2 == ')')) pc2++;
				if (!*pc2) {
					if (ext_conf->debug_level > 0)
						fprintf(stderr, "%s: '%s'\n", _("the 'Useragent' field of the logfile is incorrect"),buf_copy);
					free(buf_copy);
					return -1;
				} else if (*pc2 == ')') {
					finished = 1;
				}
				
				while (*pc1 == ' ') pc1++;
				
				*pc2 = '\0';
				if (!record->req_useragent && find_ua(ext_conf, pc1)) {
					record->req_useragent = malloc(pc2-pc1+1);
					strcpy(record->req_useragent, pc1);
				} else if (!record->req_useros && find_os(ext_conf, pc1)) {
					record->req_useros = malloc(pc2-pc1+1);
					strcpy(record->req_useros, pc1);
				}
				pc1 = ++pc2;
			}
			

		} else {
			int finished = 0;
			
			pc2 = pc3;

			*pc2 = '\0';
			
			if (!find_ua(ext_conf, pc1)) {
//				printf("UA- unknown: %s\n", pc4);
			}
			
			record->req_useragent = malloc(pc2-pc1+1);
			strcpy(record->req_useragent, pc1);
			
			pc1 = pc2 = (pc3+1);

			while (!finished) {
				while (*pc2 && !(*pc2 == ';' || *pc2 == ')')) pc2++;
				if (!*pc2) {
					if (ext_conf->debug_level > 0)
						fprintf(stderr, "%s: '%s'\n", _("the 'Useragent' field of the logfile is incorrect"),buf_copy);
					free(buf_copy);
					return -1;
				} else if (*pc2 == ')') {
					finished = 1;
				}

				while (*pc1 == ' ') pc1++;
				
				*pc2 = '\0';
				
				if (!record->req_useros && find_os(ext_conf, pc1)) {
					record->req_useros = malloc(strlen(pc1)+1);
					strcpy(record->req_useros, pc1);
				}
				pc1 = ++pc2;
			}
		}

#if 0
		if (!record->req_useragent) {
			printf("UA unknown: %s\n", pc4);
		}
		
		if (!record->req_useros) {
			printf("OS unknown: %s\n", pc4);
		}
#endif
	} else {
		record->req_useragent = malloc(strlen(str)+1);
		strcpy(record->req_useragent, str);
	}
	
	free(buf_copy);
	
	return 0;
}

int parse_url(mconfig *ext_conf,const char *str, mlogrec_web *record) {
#define N 20 + 1
	int ovector[3 * N], n;
#ifdef DEBUG_INPUT
	int i;
#endif
	config_input *conf = ext_conf->input;
	const char **list;
	
	if ((n = pcre_exec(conf->match_url, conf->match_url_extra, str, strlen(str), 0, 0, ovector, 3 * N)) < 0) {
		if (n == PCRE_ERROR_NOMATCH) {
			fprintf(stderr, "%s.%d: string doesn't match: %s\n", __FILE__, __LINE__, str);
		} else {
			fprintf(stderr, "%s.%d: execution error while matching: %d\n", __FILE__, __LINE__, n);
		}
		return -1;
	}
	
	if (n >= 3) {
		/* everything has matched, take the different pieces and be happy :) */
		pcre_get_substring_list(str, ovector, n, &list);
	
		record->req_method = malloc(strlen((char *)list[1])+1);
		strcpy(record->req_method, (char *)list[1]);
		record->req_url = malloc(strlen((char *)list[2])+1);
		strcpy(record->req_url, (char *)list[2]);
		
		if (n >= 4) {
			if (strlen((char *)list[4])) {
				record->req_getvars = malloc(strlen((char *)list[4])+1);
				strcpy(record->req_getvars, (char *)list[4]);
			}
		}
			
		if (n >= 6) {
			record->req_protocol = malloc(strlen((char *)list[6])+1);
			strcpy(record->req_protocol, (char *)list[6]);
		}
#ifdef DEBUG_INPUT				
		for (i = 0; i < n ; i++) {
			printf("--> %d: %s\n", i, list[i]);
		}

		fprintf(stderr, "%s.%d: %s, %s, %s, %s\n", __FILE__, __LINE__, record->req_method, record->req_url, record->req_getvars, record->req_protocol);
#endif		
		free(list);
	} else {
		fprintf(stderr, "%s.%d: Matched fields below minimum: %d\n", __FILE__, __LINE__, n);
		return -1;
	}
	
	return 0;
#undef  N
}

int parse_referrer(mconfig *ext_conf,const char *str, mlogrec_web_extclf *record) {
#define N 20 + 1
	int ovector[3 * N], n;
	config_input *conf = ext_conf->input;
	const char **list;
	
	if ((n = pcre_exec(conf->match_referrer, conf->match_referrer_extra, str, strlen(str), 0, 0, ovector, 3 * N)) < 0) {
		if (n == PCRE_ERROR_NOMATCH) {
			fprintf(stderr, "%s.%d: string doesn't match: %s\n", __FILE__, __LINE__, str);
		} else {
			fprintf(stderr, "%s.%d: execution error while matching: %d\n", __FILE__, __LINE__, n);
		}
		return -1;
	}
	
	if (n >= 2) {
		/* everything has matched, take the different pieces and be happy :) */
		pcre_get_substring_list(str, ovector, n, &list);
	
		record->ref_url = malloc(strlen((char *)list[1])+1);
		strcpy(record->ref_url, (char *)list[1]);
		
		if (n > 3) {
			record->ref_getvars = malloc(strlen((char *)list[3])+1);
			strcpy(record->ref_getvars, (char *)list[3]);
		}
#ifdef DEBUG_INPUT		
		fprintf(stderr, "%s.%d: %s, %s\n", __FILE__, __LINE__, record->ref_url, record->ref_getvars);
#endif
		free(list);
	} else {
		fprintf(stderr, "%s.%d: Matched fields below minimum: %d\n", __FILE__, __LINE__, n);
		return -1;
	}
	
	
	
	return 0;
#undef  N
}

int parse_record_pcre(mconfig *ext_conf, mlogrec *record, char *_buffer) {
#define N 20 + 1
	const char **list;
	int ovector[3 * N], n;
	config_input *conf = ext_conf->input;
	int endpos;
	mlogrec_web *recweb = NULL; 
	
	record->ext_type = M_RECORD_TYPE_WEB;
	record->ext = mrecord_init_web();
	
	recweb = record->ext;
	
	if (recweb == NULL) return -1;
	
	if (strncmp("format=", _buffer, 7) == 0) {
		fprintf(stderr, "%s.%d: detected a NetScape Server Log - perhaps it goes wrong\n", __FILE__, __LINE__);
		fprintf(stderr, "%s.%d: bitch the developer for real Netscape support\n", __FILE__, __LINE__);
	}

/* parse a CLF record */	
	if ((n = pcre_exec(conf->match_clf, conf->match_clf_extra, _buffer, strlen(_buffer), 0, 0, ovector, 3 * N)) < 0) {
		if (n == PCRE_ERROR_NOMATCH) {
			fprintf(stderr, "%s.%d: string doesn't match: %s\n", __FILE__, __LINE__, _buffer);
		} else {
			fprintf(stderr, "%s.%d: execution error while matching: %d\n", __FILE__, __LINE__, n);
		}
		return -1;
	}
	
	if (n >= 7) {
		pcre_get_substring_list(_buffer, ovector, n, &list);
		
		recweb->req_host = malloc(strlen((char *)list[1])+1);
		strcpy(recweb->req_host, (char *)list[1]);
	
		recweb->req_user = malloc(strlen((char *)list[3])+1);
		strcpy(recweb->req_user, (char *)list[3]);
	
		if (parse_timestamp(ext_conf, list[4], record) == -1) {
			free(list);
			return -1;
		}
	
		if (parse_url(ext_conf, list[5], recweb) == -1) {
			free(list);
			return -1;
		}
	
		recweb->req_status = strtol(list[6], NULL,10);
		recweb->xfersize = strtol(list[7], NULL,10);
		
		free(list);
	} else {
		fprintf(stderr, "%s.%d: Matched fields below minimum: %d\n", __FILE__, __LINE__, n);
		return -1;
	}
	
	endpos = ovector[ (n-1)*2 + 1 ];
/* try to get the extended log fields */
	n = pcre_exec(conf->match_clf_extended, conf->match_clf_extended_extra, _buffer, strlen(_buffer), endpos, 0, ovector, 3 * N);
	
	if (n < 0 && n != PCRE_ERROR_NOMATCH) {
		fprintf(stderr, "%s.%d: execution error while matching: %d\n", __FILE__, __LINE__, n);
		return -1;
	} else 	if (n == 3) {
		mlogrec_web_extclf *recext;
		
		recext = mrecord_init_web_extclf();
		
		if (recext != NULL) {
			pcre_get_substring_list(_buffer, ovector, n, &list);
#ifdef DEBUG_INPUT		
			fprintf(stderr, "-elf-1-> %s, %s\n", list[1],list[2]);
#endif
	
			if (parse_referrer(ext_conf, list[1], recext) == -1) {
				mrecord_free_web_extclf(recext);
				free(list);
				return 0;
			}
		
			if (parse_useragent(ext_conf, list[2], recext)  == -1) {
				mrecord_free_web_extclf(recext);
				free(list);