/* forward declarations */
-int bdat_ungetc(int ch);
static int smtp_read_command(BOOL check_sync, unsigned buffer_lim);
static int synprot_error(int type, int code, uschar *data, uschar *errmess);
static void smtp_quit_handler(uschar **, uschar **);
sender_host_notsocket || tls_in.active >= 0)
return TRUE;
+if (smtp_inptr < smtp_inend)
+ return FALSE;
+
fd = fileno(smtp_in);
FD_ZERO(&fds);
FD_SET(fd, &fds);
+/* Refill the buffer, and notify DKIM verification code.
+Return false for error or EOF.
+*/
+
+static BOOL
+smtp_refill(unsigned lim)
+{
+int rc, save_errno;
+if (!smtp_out) return FALSE;
+fflush(smtp_out);
+if (smtp_receive_timeout > 0) alarm(smtp_receive_timeout);
+
+/* Limit amount read, so non-message data is not fed to DKIM */
+
+rc = read(fileno(smtp_in), smtp_inbuffer, MIN(IN_BUFFER_SIZE, lim));
+save_errno = errno;
+alarm(0);
+if (rc <= 0)
+ {
+ /* Must put the error text in fixed store, because this might be during
+ header reading, where it releases unused store above the header. */
+ if (rc < 0)
+ {
+ smtp_had_error = save_errno;
+ smtp_read_error = string_copy_malloc(
+ string_sprintf(" (error: %s)", strerror(save_errno)));
+ }
+ else smtp_had_eof = 1;
+ return FALSE;
+ }
+#ifndef DISABLE_DKIM
+dkim_exim_verify_feed(smtp_inbuffer, rc);
+#endif
+smtp_inend = smtp_inbuffer + rc;
+smtp_inptr = smtp_inbuffer;
+return TRUE;
+}
+
/*************************************************
* SMTP version of getc() *
*************************************************/
smtp_getc(unsigned lim)
{
if (smtp_inptr >= smtp_inend)
- {
- int rc, save_errno;
- if (!smtp_out) return EOF;
- fflush(smtp_out);
- if (smtp_receive_timeout > 0) alarm(smtp_receive_timeout);
-
- /* Limit amount read, so non-message data is not fed to DKIM */
-
- rc = read(fileno(smtp_in), smtp_inbuffer, MIN(IN_BUFFER_SIZE, lim));
- save_errno = errno;
- alarm(0);
- if (rc <= 0)
- {
- /* Must put the error text in fixed store, because this might be during
- header reading, where it releases unused store above the header. */
- if (rc < 0)
- {
- smtp_had_error = save_errno;
- smtp_read_error = string_copy_malloc(
- string_sprintf(" (error: %s)", strerror(save_errno)));
- }
- else smtp_had_eof = 1;
+ if (!smtp_refill(lim))
return EOF;
- }
-#ifndef DISABLE_DKIM
- dkim_exim_verify_feed(smtp_inbuffer, rc);
-#endif
- smtp_inend = smtp_inbuffer + rc;
- smtp_inptr = smtp_inbuffer;
- }
return *smtp_inptr++;
}
+uschar *
+smtp_getbuf(unsigned * len)
+{
+unsigned size;
+uschar * buf;
+
+if (smtp_inptr >= smtp_inend)
+ if (!smtp_refill(*len))
+ { *len = 0; return NULL; }
+
+if ((size = smtp_inend - smtp_inptr) > *len) size = *len;
+buf = smtp_inptr;
+smtp_inptr += size;
+*len = size;
+return buf;
+}
+
void
smtp_get_cache(void)
{
return lwr_receive_getc(chunking_data_left--);
receive_getc = lwr_receive_getc;
+ receive_getbuf = lwr_receive_getbuf;
receive_ungetc = lwr_receive_ungetc;
#ifndef DISABLE_DKIM
dkim_save = dkim_collect_input;
if (!pipelining_advertised && !check_sync())
{
+ unsigned n = smtp_inend - smtp_inptr;
+ if (n > 32) n = 32;
+
incomplete_transaction_log(US"sync failure");
log_write(0, LOG_MAIN|LOG_REJECT, "SMTP protocol synchronization error "
"(next input sent too soon: pipelining was not advertised): "
"rejected \"%s\" %s next input=\"%s\"",
smtp_cmd_buffer, host_and_ident(TRUE),
- string_printing(smtp_inptr));
+ string_printing(string_copyn(smtp_inptr, n)));
(void) synprot_error(L_smtp_protocol_error, 554, NULL,
US"SMTP synchronization error");
goto repeat_until_rset;
}
receive_getc = bdat_getc;
+ receive_getbuf = bdat_getbuf;
receive_ungetc = bdat_ungetc;
#ifndef DISABLE_DKIM
dkim_collect_input = dkim_save;
}
}
+uschar *
+bdat_getbuf(unsigned * len)
+{
+uschar * buf;
+
+if (chunking_data_left <= 0)
+ { *len = 0; return NULL; }
+
+if (*len > chunking_data_left) *len = chunking_data_left;
+buf = lwr_receive_getbuf(len); /* Either smtp_getbuf or tls_getbuf */
+chunking_data_left -= *len;
+return buf;
+}
+
void
bdat_flush_data(void)
{
-while (chunking_data_left > 0)
- if (lwr_receive_getc(chunking_data_left--) < 0)
- break;
+unsigned n = chunking_data_left;
+(void) bdat_getbuf(&n);
receive_getc = lwr_receive_getc;
+receive_getbuf = lwr_receive_getbuf;
receive_ungetc = lwr_receive_ungetc;
if (chunking_state != CHUNKING_LAST)
static int
swallow_until_crlf(int fd, uschar *base, int already, int capacity)
{
- uschar *to = base + already;
- uschar *cr;
- int have = 0;
- int ret;
- int last = 0;
-
- /* For "PROXY UNKNOWN\r\n" we, at time of writing, expect to have read
- up through the \r; for the _normal_ case, we haven't yet seen the \r. */
- cr = memchr(base, '\r', already);
- if (cr != NULL)
- {
- if ((cr - base) < already - 1)
- {
- /* \r and presumed \n already within what we have; probably not
- actually proxy protocol, but abort cleanly. */
- return 0;
- }
- /* \r is last character read, just need one more. */
- last = 1;
- }
+uschar *to = base + already;
+uschar *cr;
+int have = 0;
+int ret;
+int last = 0;
+
+/* For "PROXY UNKNOWN\r\n" we, at time of writing, expect to have read
+up through the \r; for the _normal_ case, we haven't yet seen the \r. */
- while (capacity > 0)
+cr = memchr(base, '\r', already);
+if (cr != NULL)
+ {
+ if ((cr - base) < already - 1)
{
- do { ret = recv(fd, to, 1, 0); } while (ret == -1 && errno == EINTR);
- if (ret == -1)
- return -1;
- have++;
- if (last)
- return have;
- if (*to == '\r')
- last = 1;
- capacity--;
- to++;
+ /* \r and presumed \n already within what we have; probably not
+ actually proxy protocol, but abort cleanly. */
+ return 0;
}
- // reached end without having room for a final newline, abort
- errno = EOVERFLOW;
- return -1;
+ /* \r is last character read, just need one more. */
+ last = 1;
+ }
+
+while (capacity > 0)
+ {
+ do { ret = recv(fd, to, 1, 0); } while (ret == -1 && errno == EINTR);
+ if (ret == -1)
+ return -1;
+ have++;
+ if (last)
+ return have;
+ if (*to == '\r')
+ last = 1;
+ capacity--;
+ to++;
+ }
+
+/* reached end without having room for a final newline, abort */
+errno = EOVERFLOW;
+return -1;
}
/*************************************************
do
{
/* The inbound host was declared to be a Proxy Protocol host, so
- don't do a PEEK into the data, actually slurp up enough to be
- "safe". Can't take it all because TLS-on-connect clients follow
- immediately with TLS handshake. */
+ don't do a PEEK into the data, actually slurp up enough to be
+ "safe". Can't take it all because TLS-on-connect clients follow
+ immediately with TLS handshake. */
ret = recv(fd, &hdr, PROXY_INITIAL_READ, 0);
}
while (ret == -1 && errno == EINTR);
ver = (hdr.v2.ver_cmd & 0xf0) >> 4;
/* May 2014: haproxy combined the version and command into one byte to
- allow two full bytes for the length field in order to proxy SSL
- connections. SSL Proxy is not supported in this version of Exim, but
- must still separate values here. */
+ allow two full bytes for the length field in order to proxy SSL
+ connections. SSL Proxy is not supported in this version of Exim, but
+ must still separate values here. */
if (ver != 0x02)
{
DEBUG(D_receive) debug_printf("Detected PROXYv1 header\n");
DEBUG(D_receive) debug_printf("Bytes read not within PROXY header: %d\n", ret - size);
/* Step through the string looking for the required fields. Ensure
- strict adherence to required formatting, exit for any error. */
+ strict adherence to required formatting, exit for any error. */
p += 5;
if (!isspace(*(p++)))
{
recipients_list = NULL;
rcpt_count = rcpt_defer_count = rcpt_fail_count =
raw_recipients_count = recipients_count = recipients_list_max = 0;
-cancel_cutthrough_connection("smtp reset");
message_linecount = 0;
message_size = -1;
acl_added_headers = NULL;
if ((receive_feof)()) return 0; /* Treat EOF as QUIT */
+cancel_cutthrough_connection(TRUE, US"smtp_setup_batch_msg");
smtp_reset(reset_point); /* Reset for start of message */
/* Deal with SMTP commands. This loop is exited by setting done to a POSITIVE
/* Fall through */
case RSET_CMD:
+ cancel_cutthrough_connection(TRUE, US"RSET received");
smtp_reset(reset_point);
bsmtp_transaction_linecount = receive_linecount;
break;
/* Reset to start of message */
+ cancel_cutthrough_connection(TRUE, US"MAIL received");
smtp_reset(reset_point);
/* Apply SMTP rewrite */
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malloc() failed for SMTP input buffer");
receive_getc = smtp_getc;
+receive_getbuf = smtp_getbuf;
receive_get_cache = smtp_get_cache;
receive_ungetc = smtp_ungetc;
receive_feof = smtp_feof;
if (!check_sync())
{
+ unsigned n = smtp_inend - smtp_inptr;
+ if (n > 32) n = 32;
+
log_write(0, LOG_MAIN|LOG_REJECT, "SMTP protocol "
"synchronization error (input sent without waiting for greeting): "
"rejected connection from %s input=\"%s\"", host_and_ident(TRUE),
- string_printing(smtp_inptr));
+ string_printing(string_copyn(smtp_inptr, n)));
smtp_printf("554 SMTP synchronization error\r\n");
return FALSE;
}
#endif
smtp_code = US"250 "; /* Default response code plus space*/
- if (user_msg == NULL)
+ if (!user_msg)
{
s = string_sprintf("%.3s %s Hello %s%s%s",
smtp_code,
smtp_active_hostname,
- (sender_ident == NULL)? US"" : sender_ident,
- (sender_ident == NULL)? US"" : US" at ",
- (sender_host_name == NULL)? sender_helo_name : sender_host_name);
+ sender_ident ? sender_ident : US"",
+ sender_ident ? US" at " : US"",
+ sender_host_name ? sender_host_name : sender_helo_name);
ptr = Ustrlen(s);
size = ptr + 1;
- if (sender_host_address != NULL)
+ if (sender_host_address)
{
s = string_catn(s, &size, &ptr, US" [", 2);
s = string_cat (s, &size, &ptr, sender_host_address);
: pnormal)
+ (tls_in.active >= 0 ? pcrpted : 0)
];
+ cancel_cutthrough_connection(TRUE, US"sent EHLO response");
smtp_reset(reset_point);
toomany = FALSE;
break; /* HELO/EHLO */
/* Reset for start of message - even if this is going to fail, we
obviously need to throw away any previous data. */
+ cancel_cutthrough_connection(TRUE, US"MAIL received");
smtp_reset(reset_point);
toomany = FALSE;
sender_data = recipient_data = NULL;
(int)chunking_state, chunking_data_left);
lwr_receive_getc = receive_getc;
+ lwr_receive_getbuf = receive_getbuf;
lwr_receive_ungetc = receive_ungetc;
receive_getc = bdat_getc;
receive_ungetc = bdat_ungetc;
do an implied RSET when STARTTLS is received. */
incomplete_transaction_log(US"STARTTLS");
+ cancel_cutthrough_connection(TRUE, US"STARTTLS received");
smtp_reset(reset_point);
toomany = FALSE;
cmd_list[CMD_LIST_STARTTLS].is_mail_cmd = FALSE;
case RSET_CMD:
smtp_rset_handler();
+ cancel_cutthrough_connection(TRUE, US"RSET received");
smtp_reset(reset_point);
toomany = FALSE;
break;
git://git.exim.org / exim.git / blobdiff