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-rw-r--r--src/smtpd/smtpd.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/src/smtpd/smtpd.c b/src/smtpd/smtpd.c
index 4f4aedd..c2aa428 100644
--- a/src/smtpd/smtpd.c
+++ b/src/smtpd/smtpd.c
@@ -4114,14 +4114,31 @@ static int bdat_cmd(SMTPD_STATE *state, int argc, SMTPD_TOKEN *argv)
/*
* Read lines from the fragment. The last line may continue in the
* next fragment, or in the next chunk.
+ *
+ * If smtp_get_noexcept() stopped after var_line_limit bytes and did not
+ * emit a queue file record, then that means smtp_get_noexcept()
+ * stopped after CR and hit EOF as it tried to find out if the next
+ * byte is LF. In that case, read the first byte from the next
+ * fragment or chunk, and if that first byte is LF, then
+ * smtp_get_noexcept() strips off the trailing CRLF and returns '\n'
+ * as it always does after reading a complete line.
*/
do {
+ int can_read = var_line_limit - LEN(state->bdat_get_buffer);
+
if (smtp_get_noexcept(state->bdat_get_buffer,
state->bdat_get_stream,
- var_line_limit,
+ can_read > 0 ? can_read : 1, /* Peek one */
SMTP_GET_FLAG_APPEND) == '\n') {
/* Stopped at end-of-line. */
curr_rec_type = REC_TYPE_NORM;
+ } else if (LEN(state->bdat_get_buffer) > var_line_limit) {
+ /* Undo peeking, and output the buffer as REC_TYPE_CONT. */
+ vstream_ungetc(state->bdat_get_stream,
+ vstring_end(state->bdat_get_buffer)[-1]);
+ vstring_truncate(state->bdat_get_buffer,
+ LEN(state->bdat_get_buffer) - 1);
+ curr_rec_type = REC_TYPE_CONT;
} else if (!vstream_feof(state->bdat_get_stream)) {
/* Stopped at var_line_limit. */
curr_rec_type = REC_TYPE_CONT;