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session.c refactorig #2

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Change-Id: I9fc31ff4ea5c4f18571451dfb1e0a0c4cd1fa3a0
Signed-off-by: SJ <sj@acts.hu>
This commit is contained in:
SJ 2016-08-18 00:02:04 +02:00
parent e6559bc906
commit 27f7a99dd9
2 changed files with 100 additions and 76 deletions
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2
src/defs.h
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@ -374,6 +374,8 @@ struct counters {
struct session_ctx { struct session_ctx {
char *status;
char *message_id;
int new_sd; int new_sd;
int db_conn; int db_conn;
int inj; int inj;

174
src/session.c
View File

@ -20,7 +20,9 @@
#include "smtp.h" #include "smtp.h"
int is_blocked_by_tcp_wrappers(int sd); int is_blocked_by_tcp_wrappers(int sd);
void send_response_to_data(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, char *rcptto, struct __config *cfg);
void process_written_file(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, struct __config *cfg); void process_written_file(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, struct __config *cfg);
void process_data(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, struct parser_state *parser_state, struct __config *cfg);
int handle_smtp_session(int new_sd, struct __data *data, struct __config *cfg){ int handle_smtp_session(int new_sd, struct __data *data, struct __config *cfg){
@ -41,6 +43,8 @@ int handle_smtp_session(int new_sd, struct __data *data, struct __config *cfg){
sctx.new_sd = new_sd; sctx.new_sd = new_sd;
sctx.inj = ERR; sctx.inj = ERR;
sctx.db_conn = 0; sctx.db_conn = 0;
sctx.status = NULL;
sctx.message_id = NULL;
sctx.counters = &counters; sctx.counters = &counters;
#ifdef HAVE_LIBWRAP #ifdef HAVE_LIBWRAP
@ -360,8 +364,8 @@ int is_blocked_by_tcp_wrappers(int sd){
void process_written_file(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, struct __config *cfg){ void process_written_file(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, struct __config *cfg){
int i; int i;
char *rcpt, *status = NULL, *arule = NULL; char *rcpt;
char virusinfo[SMALLBUFSIZE], delay[SMALLBUFSIZE], tmpbuf[SMALLBUFSIZE]; char delay[SMALLBUFSIZE], tmpbuf[SMALLBUFSIZE];
struct parser_state parser_state; struct parser_state parser_state;
struct timezone tz; struct timezone tz;
struct timeval tv1, tv2; struct timeval tv1, tv2;
@ -373,6 +377,8 @@ void process_written_file(struct session_ctx *sctx, struct session_data *sdata,
parser_state = parse_message(sdata, 1, data, cfg); parser_state = parse_message(sdata, 1, data, cfg);
post_parse(sdata, &parser_state, cfg); post_parse(sdata, &parser_state, cfg);
sctx->message_id = parser_state.message_id;
gettimeofday(&tv2, &tz); gettimeofday(&tv2, &tz);
sdata->__parsed = tvdiff(tv2, tv1); sdata->__parsed = tvdiff(tv2, tv1);
@ -403,8 +409,6 @@ void process_written_file(struct session_ctx *sctx, struct session_data *sdata,
make_digests(sdata, cfg); make_digests(sdata, cfg);
#ifdef HAVE_ANTIVIRUS #ifdef HAVE_ANTIVIRUS
if(cfg->use_antivirus == 1){ if(cfg->use_antivirus == 1){
sdata->rav = do_av_check(sdata, &virusinfo[0], data, cfg); sdata->rav = do_av_check(sdata, &virusinfo[0], data, cfg);
@ -419,83 +423,22 @@ void process_written_file(struct session_ctx *sctx, struct session_data *sdata,
#endif #endif
if(cfg->verbosity >= _LOG_DEBUG) syslog(LOG_PRIORITY, "%s: round %d in injection", sdata->ttmpfile, i); if(cfg->verbosity >= _LOG_DEBUG) syslog(LOG_PRIORITY, "%s: round %d in injection", sdata->ttmpfile, i);
sctx->inj = ERR; process_data(sctx, sdata, data, &parser_state, cfg);
status = S_STATUS_UNDEF;
send_response_to_data(sctx, sdata, data, sdata->rcptto[i], cfg);
if(sctx->db_conn == 1){
if(sdata->restored_copy == 1){
syslog(LOG_PRIORITY, "%s: discarding: restored copy", sdata->ttmpfile);
sctx->inj = OK;
}
else if(sdata->tot_len < cfg->min_message_size){
syslog(LOG_PRIORITY, "%s: discarding: too short message (%d bytes)", sdata->ttmpfile, sdata->tot_len);
sctx->inj = OK;
}
else if(AVIR_VIRUS == sdata->rav){
syslog(LOG_PRIORITY, "%s: found virus: %s", sdata->ttmpfile, virusinfo);
sctx->counters->c_virus++;
sctx->inj = OK;
} else if(strlen(sdata->bodydigest) < 10) {
syslog(LOG_PRIORITY, "%s: invalid digest", sdata->ttmpfile);
sctx->inj = ERR;
} else {
if(cfg->verbosity >= _LOG_DEBUG) syslog(LOG_PRIORITY, "%s: processing message", sdata->ttmpfile);
/* check message against archiving rules */
arule = check_againt_ruleset(data->archiving_rules, &parser_state, sdata->tot_len, sdata->spam_message);
if(arule){
syslog(LOG_PRIORITY, "%s: discarding: archiving policy: *%s*", sdata->ttmpfile, arule);
sctx->inj = OK;
sctx->counters->c_ignore++;
remove_stripped_attachments(&parser_state);
status = S_STATUS_DISCARDED;
}
else {
sctx->inj = process_message(sdata, &parser_state, data, cfg);
unlink(parser_state.message_id_hash);
sctx->counters->c_size += sdata->tot_len;
sctx->counters->c_stored_size = sdata->stored_len;
status = S_STATUS_STORED;
}
}
} /* db_conn */
/* set the accept buffer */
snprintf(sdata->acceptbuf, SMALLBUFSIZE-1, "250 Ok %s <%s>\r\n", sdata->ttmpfile, sdata->rcptto[i]);
if(sctx->inj == ERR){
snprintf(sdata->acceptbuf, SMALLBUFSIZE-1, "451 %s <%s>\r\n", sdata->ttmpfile, sdata->rcptto[i]);
status = S_STATUS_ERROR;
}
write1(sctx->new_sd, sdata->acceptbuf, strlen(sdata->acceptbuf), sdata->tls, data->ssl);
if(cfg->verbosity >= _LOG_DEBUG) syslog(LOG_PRIORITY, "%s: sent: %s", sdata->ttmpfile, sdata->acceptbuf);
sctx->counters->c_rcvd++;
if(sctx->inj == ERR_EXISTS){
syslog(LOG_PRIORITY, "%s: discarding: duplicate message, id: %llu, message-id: %s", sdata->ttmpfile, sdata->duplicate_id, parser_state.message_id);
sctx->counters->c_duplicate++;
status = S_STATUS_DUPLICATE;
}
snprintf(delay, SMALLBUFSIZE-1, "delay=%.2f, delays=%.2f/%.2f/%.2f/%.2f/%.2f/%.2f", snprintf(delay, SMALLBUFSIZE-1, "delay=%.2f, delays=%.2f/%.2f/%.2f/%.2f/%.2f/%.2f",
(sdata->__acquire+sdata->__parsed+sdata->__av+sdata->__compress+sdata->__encrypt+sdata->__store)/1000000.0, (sdata->__acquire+sdata->__parsed+sdata->__av+sdata->__compress+sdata->__encrypt+sdata->__store)/1000000.0,
sdata->__acquire/1000000.0, sdata->__parsed/1000000.0, sdata->__av/1000000.0, sdata->__compress/1000000.0, sdata->__encrypt/1000000.0, sdata->__store/1000000.0); sdata->__acquire/1000000.0, sdata->__parsed/1000000.0,
sdata->__av/1000000.0, sdata->__compress/1000000.0,
sdata->__encrypt/1000000.0, sdata->__store/1000000.0);
syslog(LOG_PRIORITY, "%s: from=%s, size=%d/%d, attachments=%d, reference=%s, message-id=%s, retention=%d, folder=%d, %s, status=%s", sdata->ttmpfile, sdata->fromemail, sdata->tot_len, syslog(LOG_PRIORITY, "%s: from=%s, size=%d/%d, attachments=%d, reference=%s, message-id=%s, retention=%d, folder=%d, %s, status=%s",
sdata->stored_len, parser_state.n_attachments, parser_state.reference, parser_state.message_id, parser_state.retention, data->folder, delay, status); sdata->ttmpfile, sdata->fromemail, sdata->tot_len,
sdata->stored_len, parser_state.n_attachments,
parser_state.reference, parser_state.message_id,
parser_state.retention, data->folder, delay, sctx->status);
#ifdef HAVE_LMTP #ifdef HAVE_LMTP
} /* for */ } /* for */
@ -504,3 +447,82 @@ void process_written_file(struct session_ctx *sctx, struct session_data *sdata,
} }
void process_data(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, struct parser_state *parser_state, struct __config *cfg){
char *arule = NULL;
char virusinfo[SMALLBUFSIZE];
sctx->inj = ERR;
sctx->status = S_STATUS_UNDEF;
if(sctx->db_conn == 1){
if(sdata->restored_copy == 1){
syslog(LOG_PRIORITY, "%s: discarding: restored copy", sdata->ttmpfile);
sctx->inj = OK;
}
else if(sdata->tot_len < cfg->min_message_size){
syslog(LOG_PRIORITY, "%s: discarding: too short message (%d bytes)", sdata->ttmpfile, sdata->tot_len);
sctx->inj = OK;
}
else if(AVIR_VIRUS == sdata->rav){
syslog(LOG_PRIORITY, "%s: found virus: %s", sdata->ttmpfile, virusinfo);
sctx->counters->c_virus++;
sctx->inj = OK;
} else if(strlen(sdata->bodydigest) < 10) {
syslog(LOG_PRIORITY, "%s: invalid digest", sdata->ttmpfile);
sctx->inj = ERR;
} else {
if(cfg->verbosity >= _LOG_DEBUG) syslog(LOG_PRIORITY, "%s: processing message", sdata->ttmpfile);
/* check message against archiving rules */
arule = check_againt_ruleset(data->archiving_rules, parser_state, sdata->tot_len, sdata->spam_message);
if(arule){
syslog(LOG_PRIORITY, "%s: discarding: archiving policy: *%s*", sdata->ttmpfile, arule);
sctx->inj = OK;
sctx->counters->c_ignore++;
remove_stripped_attachments(parser_state);
sctx->status = S_STATUS_DISCARDED;
}
else {
sctx->inj = process_message(sdata, parser_state, data, cfg);
unlink(parser_state->message_id_hash);
sctx->counters->c_size += sdata->tot_len;
sctx->counters->c_stored_size = sdata->stored_len;
sctx->status = S_STATUS_STORED;
}
}
}
}
void send_response_to_data(struct session_ctx *sctx, struct session_data *sdata, struct __data *data, char *rcptto, struct __config *cfg){
/* set the accept buffer */
snprintf(sdata->acceptbuf, SMALLBUFSIZE-1, "250 Ok %s <%s>\r\n", sdata->ttmpfile, rcptto);
if(sctx->inj == ERR){
snprintf(sdata->acceptbuf, SMALLBUFSIZE-1, "451 %s <%s>\r\n", sdata->ttmpfile, rcptto);
sctx->status = S_STATUS_ERROR;
}
write1(sctx->new_sd, sdata->acceptbuf, strlen(sdata->acceptbuf), sdata->tls, data->ssl);
if(cfg->verbosity >= _LOG_DEBUG) syslog(LOG_PRIORITY, "%s: sent: %s", sdata->ttmpfile, sdata->acceptbuf);
sctx->counters->c_rcvd++;
if(sctx->inj == ERR_EXISTS){
syslog(LOG_PRIORITY, "%s: discarding: duplicate message, id: %llu, message-id: %s", sdata->ttmpfile, sdata->duplicate_id, sctx->message_id);
sctx->counters->c_duplicate++;
sctx->status = S_STATUS_DUPLICATE;
}
}