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https://bitbucket.org/jsuto/piler.git
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412 lines
13 KiB
C
412 lines
13 KiB
C
/*
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* rules.c, SJ
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <piler.h>
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#include "rules.h"
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void reset_rule_condition(struct rule_cond *rule_cond){
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memset(rule_cond->domain, 0, SMALLBUFSIZE);
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memset(rule_cond->from, 0, SMALLBUFSIZE);
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memset(rule_cond->to, 0, SMALLBUFSIZE);
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memset(rule_cond->subject, 0, SMALLBUFSIZE);
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memset(rule_cond->body, 0, SMALLBUFSIZE);
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memset(rule_cond->_size, 0, SMALLBUFSIZE);
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memset(rule_cond->attachment_name, 0, SMALLBUFSIZE);
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memset(rule_cond->attachment_type, 0, SMALLBUFSIZE);
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memset(rule_cond->_attachment_size, 0, SMALLBUFSIZE);
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rule_cond->size = 0;
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rule_cond->attachment_size = 0;
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rule_cond->spam = 0;
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rule_cond->days = 0;
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rule_cond->folder_id = 0;
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}
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void load_rules(struct session_data *sdata, struct node *xhash[], char *table){
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char s[SMALLBUFSIZE];
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struct rule_cond rule_cond;
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struct sql sql;
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reset_rule_condition(&rule_cond);
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snprintf(s, sizeof(s)-1, "SELECT `domain`, `from`, `to`, `subject`, `body`, `_size`, `size`, `attachment_name`, `attachment_type`, `_attachment_size`, `attachment_size`, `spam`, `days`, `folder_id` FROM `%s`", table);
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if(prepare_sql_statement(sdata, &sql, s) == ERR) return;
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p_bind_init(&sql);
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if(p_exec_stmt(sdata, &sql) == OK){
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p_bind_init(&sql);
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sql.sql[sql.pos] = &rule_cond.domain[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.domain)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond.from[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.from)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond.to[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.to)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond.subject[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.subject)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond.body[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.body)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond._size[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond._size)-2; sql.pos++;
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sql.sql[sql.pos] = (char *)&rule_cond.size; sql.type[sql.pos] = TYPE_LONG; sql.len[sql.pos] = sizeof(rule_cond.size); sql.pos++;
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sql.sql[sql.pos] = &rule_cond.attachment_name[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.attachment_name)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond.attachment_type[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond.attachment_type)-2; sql.pos++;
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sql.sql[sql.pos] = &rule_cond._attachment_size[0]; sql.type[sql.pos] = TYPE_STRING; sql.len[sql.pos] = sizeof(rule_cond._attachment_size)-2; sql.pos++;
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sql.sql[sql.pos] = (char *)&rule_cond.attachment_size; sql.type[sql.pos] = TYPE_LONG; sql.len[sql.pos] = sizeof(rule_cond.attachment_size); sql.pos++;
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sql.sql[sql.pos] = (char *)&rule_cond.spam; sql.type[sql.pos] = TYPE_LONG; sql.len[sql.pos] = sizeof(rule_cond.spam); sql.pos++;
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sql.sql[sql.pos] = (char *)&rule_cond.days; sql.type[sql.pos] = TYPE_LONG; sql.len[sql.pos] = sizeof(rule_cond.days); sql.pos++;
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sql.sql[sql.pos] = (char *)&rule_cond.folder_id; sql.type[sql.pos] = TYPE_LONG; sql.len[sql.pos] = sizeof(rule_cond.folder_id); sql.pos++;
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p_store_results(&sql);
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while(p_fetch_results(&sql) == OK){
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append_rule(xhash, &rule_cond);
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reset_rule_condition(&rule_cond);
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}
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p_free_results(&sql);
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}
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close_prepared_statement(&sql);
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}
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int append_rule(struct node *xhash[], struct rule_cond *rule_cond){
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struct node *q, *Q=NULL, *node;
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struct rule *rule;
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int rc=0;
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if((node = malloc(sizeof(struct node))) == NULL) return rc;
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memset(node, 0, sizeof(struct node));
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node->r = NULL;
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rule = create_rule_item(rule_cond);
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if(rule == NULL){
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free(node);
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syslog(LOG_INFO, "could not load rule=%s/%s/%s/%s/%s/%s,%d", rule_cond->domain, rule_cond->from, rule_cond->to, rule_cond->subject, rule_cond->body, rule_cond->_size, rule_cond->size);
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return rc;
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}
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node->str = rule;
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q = xhash[0];
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while(q != NULL){
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Q = q;
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q = q->r;
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}
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if(Q == NULL) xhash[0] = node;
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else {
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Q->r = node;
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}
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rc = 1;
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return rc;
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}
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struct rule *create_rule_item(struct rule_cond *rule_cond){
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struct rule *h=NULL;
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char empty = '\0';
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int len;
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if(rule_cond == NULL) return NULL;
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if((h = malloc(sizeof(struct rule))) == NULL)
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return NULL;
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h->compiled = 1;
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h->domain = NULL;
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h->domainlen = strlen(rule_cond->domain);
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if(h->domainlen > 2){
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h->domain = malloc(h->domainlen+2);
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if(h->domain) snprintf(h->domain, h->domainlen, "%s", rule_cond->domain);
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else {
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h->compiled = 0;
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syslog(LOG_INFO, "malloc error in create_rule_item() for '%s'", rule_cond->domain);
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}
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}
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h->emptyfrom = h->emptyto = h->emptysubject = h->emptyaname = h->emptyatype = 0;
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if(rule_cond->from == NULL || strlen(rule_cond->from) < 1){ rule_cond->from[0] = empty; h->emptyfrom = 1; }
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if(regcomp(&(h->from), rule_cond->from, REG_ICASE | REG_EXTENDED)) h->compiled = 0;
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if(rule_cond->to == NULL || strlen(rule_cond->to) < 1){ rule_cond->to[0] = empty; h->emptyto = 1; }
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if(regcomp(&(h->to), rule_cond->to, REG_ICASE | REG_EXTENDED)) h->compiled = 0;
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if(rule_cond->subject == NULL || strlen(rule_cond->subject) < 1){ rule_cond->subject[0] = empty; h->emptysubject = 1; }
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if(regcomp(&(h->subject), rule_cond->subject, REG_ICASE | REG_EXTENDED)) h->compiled = 0;
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if(rule_cond->body == NULL || strlen(rule_cond->body) < 1){ rule_cond->body[0] = empty; h->emptybody = 1; }
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if(regcomp(&(h->body), rule_cond->body, REG_ICASE | REG_EXTENDED)) h->compiled = 0;
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h->spam = rule_cond->spam;
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h->days = rule_cond->days;
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h->folder_id = rule_cond->folder_id;
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h->size = rule_cond->size;
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if(rule_cond->_size == NULL) rule_cond->_size[0] = empty;
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snprintf(h->_size, 3, "%s", rule_cond->_size);
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if(rule_cond->attachment_name == NULL || strlen(rule_cond->attachment_name) < 1){ rule_cond->attachment_name[0] = empty; h->emptyaname = 1; }
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if(regcomp(&(h->attachment_name), rule_cond->attachment_name, REG_ICASE | REG_EXTENDED)) h->compiled = 0;
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if(rule_cond->attachment_type == NULL || strlen(rule_cond->attachment_type) < 1){ rule_cond->attachment_type[0] = empty; h->emptyatype = 1; }
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if(regcomp(&(h->attachment_type), rule_cond->attachment_type, REG_ICASE | REG_EXTENDED)) h->compiled = 0;
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h->attachment_size = rule_cond->attachment_size;
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if(rule_cond->_attachment_size == NULL) rule_cond->_attachment_size[0] = empty;
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snprintf(h->_attachment_size, 3, "%s", rule_cond->_attachment_size);
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len = strlen(rule_cond->domain)+8 + strlen(rule_cond->from)+6 + strlen(rule_cond->to)+4 + strlen(rule_cond->subject)+9 + strlen(rule_cond->body)+6 + strlen(rule_cond->_size)+6 + strlen(rule_cond->attachment_name)+10 + strlen(rule_cond->attachment_type)+10 + strlen(rule_cond->_attachment_size)+10 + 9 + 15 + 15;
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h->rulestr = malloc(len);
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if(h->rulestr){
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snprintf(h->rulestr, len-1, "domain=%s,from=%s,to=%s,subject=%s,body=%s,size%s%d,att.name=%s,att.type=%s,att.size%s%d,spam=%d", rule_cond->domain, rule_cond->from, rule_cond->to, rule_cond->subject, rule_cond->body, rule_cond->_size, rule_cond->size, rule_cond->attachment_name, rule_cond->attachment_type, rule_cond->_attachment_size, rule_cond->attachment_size, rule_cond->spam);
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syslog(LOG_INFO, "adding rule: %s", h->rulestr);
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}
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else h->compiled = 0;
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h->r = NULL;
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return h;
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}
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int count_match(struct rule *p, struct parser_state *state, int size, int spam){
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int ismatch=0;
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ismatch += check_spam_rule(spam, p->spam);
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ismatch += check_size_rule(size, p->size, p->_size);
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ismatch += check_attachment_rule(state, p);
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if(p->compiled == 1){
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size_t nmatch=0;
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if(p->emptyfrom == 1){
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ismatch += RULE_UNDEF;
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}
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else if(regexec(&(p->from), state->b_from, nmatch, NULL, 0) == 0) ismatch += RULE_MATCH; else ismatch += RULE_NO_MATCH;
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if(p->emptyto == 1){
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ismatch += RULE_UNDEF;
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}
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else if(regexec(&(p->to), state->b_to, nmatch, NULL, 0) == 0) ismatch += RULE_MATCH; else ismatch += RULE_NO_MATCH;
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if(p->emptysubject == 1){
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ismatch += RULE_UNDEF;
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}
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else if(regexec(&(p->subject), state->b_subject, nmatch, NULL, 0) == 0) ismatch += RULE_MATCH; else ismatch += RULE_NO_MATCH;
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if(p->emptybody == 1){
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ismatch += RULE_UNDEF;
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}
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else if(regexec(&(p->body), state->b_body, nmatch, NULL, 0) == 0) ismatch += RULE_MATCH; else ismatch += RULE_NO_MATCH;
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}
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return ismatch;
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}
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char *check_against_ruleset(struct node *xhash[], struct parser_state *state, int size, int spam){
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struct rule *p;
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struct node *q;
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q = xhash[0];
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while(q != NULL){
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if(q->str){
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p = q->str;
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if(count_match(p, state, size, spam) > 0){
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return p->rulestr;
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}
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}
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q = q->r;
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}
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return NULL;
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}
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time_t query_retain_period(struct data *data, struct parser_state *state, int size, int spam, struct config *cfg){
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struct rule *p;
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struct node *q;
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q = data->retention_rules[0];
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while(q != NULL){
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if(q->str){
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p = q->str;
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if(p->domainlen > 2){
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if(strcasestr(state->b_to_domain, p->domain) || strcasestr(state->b_from_domain, p->domain)){
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state->retention = p->days;
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return (time_t)(state->retention) * (time_t)86400;
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}
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}
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else if(count_match(p, state, size, spam) > 0){
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state->retention = p->days;
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return (time_t)(state->retention) * (time_t)86400;
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}
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}
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q = q->r;
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}
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state->retention = cfg->default_retention_days;
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return (time_t)(state->retention) * (time_t)86400;
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}
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int get_folder_id_by_rule(struct data *data, struct parser_state *state, int size, int spam, struct config *cfg){
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struct rule *p;
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struct node *q;
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if(cfg->enable_folders == 0) return 0;
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q = data->folder_rules[0];
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while(q != NULL){
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if(q->str){
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p = q->str;
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if(p->domainlen > 2){
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if(strcasestr(state->b_to_domain, p->domain) || strcasestr(state->b_from_domain, p->domain)){
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return p->folder_id;
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}
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}
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else if(count_match(p, state, size, spam) > 0){
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return p->folder_id;
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}
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}
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q = q->r;
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}
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return 0; // default folder_id
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}
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int check_size_rule(int message_size, int size, char *_size){
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if(size <= 0) return RULE_UNDEF;
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if(strcmp(_size, ">") == 0 && message_size > size) return RULE_MATCH;
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if(strcmp(_size, "<") == 0 && message_size < size) return RULE_MATCH;
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if(strcmp(_size, "=") == 0 && message_size == size) return RULE_MATCH;
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if( (strcmp(_size, "<>") == 0 || strcmp(_size, "!=") == 0) && message_size != size) return RULE_MATCH;
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return RULE_NO_MATCH;
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}
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int check_spam_rule(int is_spam, int spam){
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if(spam == -1) return RULE_UNDEF;
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if(is_spam == spam) return RULE_MATCH;
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return RULE_NO_MATCH;
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}
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int check_attachment_rule(struct parser_state *state, struct rule *rule){
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int i;
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size_t nmatch=0;
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// If no attachment rule, then return RULE_UNDEF
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if(rule->emptyaname == 1 && rule->emptyatype == 1 && rule->attachment_size == 0) return RULE_UNDEF;
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// If we have attachments, but no attachment rules, then return RULE_NO_MATCH
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if(state->n_attachments == 0 && (rule->emptyaname == 0 || rule->emptyatype == 0 || rule->attachment_size)) return RULE_NO_MATCH;
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for(i=1; i<=state->n_attachments; i++){
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int ismatch = 0;
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if(rule->emptyaname == 0){
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if(regexec(&(rule->attachment_name), state->attachments[i].filename, nmatch, NULL, 0) == 0)
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ismatch += RULE_MATCH;
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else
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ismatch += RULE_NO_MATCH;
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}
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if(rule->emptyatype == 0){
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if(regexec(&(rule->attachment_type), state->attachments[i].type, nmatch, NULL, 0) == 0)
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ismatch += RULE_MATCH;
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else
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ismatch += RULE_NO_MATCH;
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}
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ismatch += check_size_rule(state->attachments[i].size, rule->attachment_size, rule->_attachment_size);
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if(ismatch > 0) return RULE_MATCH;
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}
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return RULE_NO_MATCH;
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}
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void initrules(struct node *xhash[]){
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xhash[0] = NULL;
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}
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void clearrules(struct node *xhash[]){
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struct node *q;
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struct rule *rule;
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q = xhash[0];
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while(q != NULL){
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struct node *p = q;
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q = q->r;
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if(p->str){
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rule = (struct rule*)p->str;
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regfree(&(rule->from));
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regfree(&(rule->to));
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regfree(&(rule->subject));
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regfree(&(rule->body));
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regfree(&(rule->attachment_name));
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regfree(&(rule->attachment_type));
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free(rule->rulestr);
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if(rule->domain) free(rule->domain);
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free(rule);
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}
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free(p);
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}
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xhash[0] = NULL;
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}
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