mirror of
https://bitbucket.org/jsuto/piler.git
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118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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* bdat.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 <strings.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <signal.h>
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#include <syslog.h>
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#include <time.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <piler.h>
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#include <smtp.h>
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void reset_bdat_counters(struct smtp_session *session){
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session->bdat_bytes_to_read = 0;
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session->bad = 0;
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}
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void get_bdat_size_to_read(struct smtp_session *session, char *buf){
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char *p;
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session->bdat_bytes_to_read = 0;
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session->protocol_state = SMTP_STATE_BDAT;
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p = strcasestr(buf, " LAST");
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if(p){
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*p = '\0';
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}
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// determine the size to be read
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p = strchr(buf, ' ');
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if(p){
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session->bdat_bytes_to_read = atoi(p);
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if(session->cfg->verbosity >= _LOG_DEBUG) syslog(LOG_INFO, "fd=%d: BDAT len=%d", session->net.socket, session->bdat_bytes_to_read);
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}
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if(!p || session->bdat_bytes_to_read <= 0){
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session->bdat_bytes_to_read = 0;
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syslog(LOG_INFO, "%s: ERROR: malformed BDAT command", session->ttmpfile);
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}
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}
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void process_bdat(struct smtp_session *session, char *readbuf, int readlen, struct config *cfg){
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if(readlen <= 0) return;
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if(session->fd == -1){
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session->fd = open(session->ttmpfile, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR|S_IRGRP);
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if(session->fd == -1){
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syslog(LOG_PRIORITY, "%s: %s", ERR_OPEN_TMP_FILE, session->ttmpfile);
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}
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if(cfg->process_rcpt_to_addresses == 1) write_envelope_addresses(session, cfg);
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}
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session->bdat_bytes_to_read -= readlen;
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if(session->fd != -1){
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if(write(session->fd, readbuf, readlen) != -1){
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session->tot_len += readlen;
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if(session->cfg->verbosity >= _LOG_EXTREME) syslog(LOG_INFO, "%s: wrote %d bytes, %d bytes to go", session->ttmpfile, readlen, session->bdat_bytes_to_read);
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}
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else syslog(LOG_PRIORITY, "ERROR: write(), %s, %d, %s", __func__, __LINE__, __FILE__);
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}
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if(session->bdat_bytes_to_read < 0){
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// malformed data from client: we got more data then had been told in BDAT argument
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syslog(LOG_PRIORITY, "ERROR: invalid BDAT data. Expected %d, got %d bytes", session->bdat_bytes_to_read + readlen, readlen);
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session->bad = 1;
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close(session->fd);
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unlink(session->ttmpfile);
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session->fd = -1;
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}
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// If there's nothing more to read, then send response to smtp client
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if(session->bdat_bytes_to_read <= 0){
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if(session->fd == -1){
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send_smtp_response(session, SMTP_RESP_421_ERR_WRITE_FAILED);
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}
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else {
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fsync(session->fd);
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close(session->fd);
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session->fd = -1;
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move_email(session);
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char buf[SMALLBUFSIZE];
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snprintf(buf, sizeof(buf)-1, "250 OK <%s>\r\n", session->ttmpfile);
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send_smtp_response(session, buf);
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syslog(LOG_PRIORITY, "received: %s, from=%s, size=%d, client=%s, fd=%d", session->ttmpfile, session->mailfrom, session->tot_len, session->remote_host, session->net.socket);
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}
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// technically we are not in the PERIOD state, but it's good enough
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// to quit the BDAT processing state
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session->protocol_state = SMTP_STATE_PERIOD;
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}
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}
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