commit 5b9256f5dcd32e217637938d904d582d5f81c0fd
Author: Oswald Buddenhagen <[email protected]>
Date: Tue May 3 20:01:29 2022 +0200
add support for incomplete headers to copy_msg_convert()
in the spirit of being liberal about what we accept.
this completely re-structures the header processing loop, with the nice
side effect of eliminating the gotos.
REFMAIL: [email protected]
src/sync_msg_cvt.c | 118 ++++++++++++++++++++++++++++++---------------
src/tst_msg_cvt.c | 83 +++++++++++++++++++++++++++++--
2 files changed, 159 insertions(+), 42 deletions(-)
diff --git a/src/sync_msg_cvt.c b/src/sync_msg_cvt.c
index 472fcf6b..1e49cf7b 100644
--- a/src/sync_msg_cvt.c
+++ b/src/sync_msg_cvt.c
@@ -44,52 +44,82 @@ copy_msg_convert( int in_cr, int out_cr, copy_vars_t *vars )
uint in_len = vars->data.len;
uint idx = 0, sbreak = 0, ebreak = 0, break2 = UINT_MAX;
uint lines = 0, hdr_crs = 0, bdy_crs = 0, app_cr = 0, extra = 0;
- uint add_subj = 0;
+ uint add_subj = 0, fix_tuid = 0, fix_subj = 0, fix_hdr = 0, end_hdr = 0;
if (vars->srec) {
- nloop: ;
- uint start = idx;
- uint line_cr = 0;
- char pc = 0;
- while (idx < in_len) {
- char c = in_buf[idx++];
- if (c == '\n') {
+ for (;;) {
+ uint start = idx;
+ uint line_cr = 0;
+ uint got_line = 0;
+ char pc = 0;
+ while (idx < in_len) {
+ char c = in_buf[idx++];
+ if (c == '\n') {
+ if (pc == '\r')
+ line_cr = 1;
+ got_line = 1;
+ break;
+ }
+ pc = c;
+ }
+ if (!ebreak && starts_with_upper( in_buf + start,
(int)(in_len - start), "X-TUID: ", 8 )) {
+ extra = (sbreak = start) - (ebreak = idx);
+ if (!vars->minimal)
+ break;
+ continue;
+ }
+ if (break2 == UINT_MAX && vars->minimal &&
+ starts_with_upper( in_buf + start, (int)(in_len -
start), "SUBJECT:", 8 )) {
+ break2 = start + 8;
+ if (break2 < in_len && in_buf[break2] == ' ')
+ break2++;
+ }
+ hdr_crs += line_cr;
+ if (got_line) {
+ lines++;
+ if (idx - line_cr - 1 != start)
+ continue;
+ // Empty line => end of headers
+ } else {
+ // The line is incomplete.
if (pc == '\r')
- line_cr = 1;
- if (!ebreak && starts_with_upper( in_buf +
start, (int)(in_len - start), "X-TUID: ", 8 )) {
- extra = (sbreak = start) - (ebreak =
idx);
- if (!vars->minimal)
- goto oke;
- } else {
- if (break2 == UINT_MAX && vars->minimal
&&
- starts_with_upper( in_buf + start,
(int)(in_len - start), "SUBJECT:", 8 )) {
- break2 = start + 8;
- if (break2 < in_len &&
in_buf[break2] == ' ')
- break2++;
- }
- lines++;
- hdr_crs += line_cr;
+ idx--; // For simplicity, move back
before trailing CR
+ if (idx != start) {
+ // The line is non-empty, so schedule
completing it
+ fix_hdr = 1;
+ // ... and put our headers after it.
(It would seem easier
+ // to prepend them, as then we could
avoid the fixing - but
+ // the line might be a continuation. We
could also prepend
+ // it to _all_ pre-exiting headers, but
then we would risk
+ // masking an (incorrectly present)
leading 'From ' header.)
+ start = idx;
}
- if (idx - line_cr - 1 == start) {
- if (!ebreak)
- sbreak = ebreak = start;
- if (vars->minimal) {
- in_len = idx;
- if (break2 == UINT_MAX) {
- break2 = start;
- add_subj = 1;
- }
- }
- goto oke;
+ end_hdr = 1;
+ }
+ if (!ebreak) {
+ sbreak = ebreak = start;
+ fix_tuid = fix_hdr;
+ fix_hdr = 0;
+ }
+ if (vars->minimal) {
+ in_len = idx;
+ if (break2 == UINT_MAX) {
+ break2 = start;
+ add_subj = 1;
+ fix_subj = fix_hdr;
+ fix_hdr = 0;
}
- goto nloop;
+ } else {
+ fix_hdr = 0;
+ end_hdr = 0;
}
- pc = c;
+ break;
}
- free( in_buf );
- return "has incomplete header";
- oke:
app_cr = out_cr && (!in_cr || hdr_crs);
+ if (fix_tuid || fix_subj || fix_hdr)
+ extra += app_cr + 1;
+ if (end_hdr)
+ extra += app_cr + 1;
extra += 8 + TUIDL + app_cr + 1;
}
if (out_cr != in_cr) {
@@ -157,6 +187,8 @@ copy_msg_convert( int in_cr, int out_cr, copy_vars_t *vars )
}
copy_msg_bytes( &out_buf, in_buf, &idx, sbreak, in_cr, out_cr );
+ if (fix_tuid)
+ ADD_NL();
memcpy( out_buf, "X-TUID: ", 8 );
out_buf += 8;
memcpy( out_buf, vars->srec->tuid, TUIDL );
@@ -170,6 +202,8 @@ copy_msg_convert( int in_cr, int out_cr, copy_vars_t *vars )
memcpy( out_buf, dummy_pfx, strlen(dummy_pfx) );
out_buf += strlen(dummy_pfx);
} else {
+ if (fix_subj)
+ ADD_NL();
memcpy( out_buf, dummy_subj, strlen(dummy_subj)
);
out_buf += strlen(dummy_subj);
ADD_NL();
@@ -178,8 +212,14 @@ copy_msg_convert( int in_cr, int out_cr, copy_vars_t *vars
)
}
copy_msg_bytes( &out_buf, in_buf, &idx, in_len, in_cr, out_cr );
- if (vars->minimal)
+ if (vars->minimal) {
+ if (end_hdr) {
+ if (fix_hdr)
+ ADD_NL();
+ ADD_NL();
+ }
memcpy( out_buf, dummy_msg_buf, dummy_msg_len );
+ }
free( in_buf );
return NULL;
diff --git a/src/tst_msg_cvt.c b/src/tst_msg_cvt.c
index 399c5c2b..399c5653 100644
--- a/src/tst_msg_cvt.c
+++ b/src/tst_msg_cvt.c
@@ -131,10 +131,13 @@ mintests( const char *name, const char *in, const char
*out, int flagged )
}
#define FROM "From: de\rvil\r\n"
-#define TO "To: me\r\n"
-#define IN_TUID "X-TUID: garbage\r\n"
+#define R_TO "To: me"
+#define TO R_TO "\r\n"
+#define R_IN_TUID "X-TUID: garbage"
+#define IN_TUID R_IN_TUID "\r\n"
#define OUT_TUID "X-TUID: " TUID "\r\n"
-#define SUBJECT "Subject: hell\r\n"
+#define R_SUBJECT "Subject: hell"
+#define SUBJECT R_SUBJECT "\r\n"
#define PH_SUBJECT "Subject: [placeholder] hell\r\n"
#define NO_SUBJECT "Subject: [placeholder] (No Subject)\r\n"
#define BODY "\r\nHi,\r\n\r\n...\r\n"
@@ -177,5 +180,79 @@ main( void )
scc out_tuid_from_subj_to[] = OUT_TUID FROM PH_SUBJECT TO PH_BODY;
mintests( "tuid / from / subject / to", in_tuid_from_subj_to,
out_tuid_from_subj_to, REGULAR );
+
+ scc in_from_to_b1[] = FROM TO;
+ fulltests( "from / to w/o end", in_from_to_b1, in_from_to_b1, AS_IS );
+ scc out_from_to_b1[] = FROM TO OUT_TUID;
+ fulltests( "from / to w/o end", in_from_to_b1, out_from_to_b1, ADD_TUID
);
+ scc in_from_tuid_to_b1[] = FROM IN_TUID TO;
+ scc out_from_tuid_to_b1[] = FROM OUT_TUID TO;
+ fulltests( "from / tuid / to w/o end", in_from_tuid_to_b1,
out_from_tuid_to_b1, ADD_TUID );
+ scc in_from_to_tuid_b1[] = FROM TO IN_TUID;
+ scc out_from_to_tuid_b1[] = FROM TO OUT_TUID;
+ fulltests( "from / to / tuid w/o end", in_from_to_tuid_b1,
out_from_to_tuid_b1, ADD_TUID );
+
+ mintests( "from / to w/o end", in_from_to_b1, out_from_to_ph, REGULAR );
+ mintests( "from / tuid / to w/o end", in_from_tuid_to_b1,
out_from_tuid_to_ph, REGULAR );
+ scc in_from_subj_to_b1[] = FROM SUBJECT TO;
+ mintests( "from / subject / to w/o end", in_from_subj_to_b1,
out_from_subj_to, REGULAR );
+ scc in_from_subj_tuid_to_b1[] = FROM SUBJECT IN_TUID TO;
+ mintests( "from / subject / tuid / to w/o end",
in_from_subj_tuid_to_b1, out_from_subj_tuid_to, REGULAR );
+ scc in_from_subj_to_tuid_b1[] = FROM SUBJECT TO IN_TUID;
+ scc out_from_subj_to_tuid_b1[] = FROM PH_SUBJECT TO OUT_TUID PH_BODY;
+ mintests( "from / subject / to / tuid w/o end",
in_from_subj_to_tuid_b1, out_from_subj_to_tuid_b1, REGULAR );
+ scc in_from_tuid_subj_to_b1[] = FROM IN_TUID SUBJECT TO;
+ mintests( "from / tuid / subject / to w/o end",
in_from_tuid_subj_to_b1, out_from_tuid_subj_to, REGULAR );
+ scc in_from_tuid_to_subj_b1[] = FROM IN_TUID TO SUBJECT;
+ scc out_from_tuid_to_subj_b1[] = FROM OUT_TUID TO PH_SUBJECT PH_BODY;
+ mintests( "from / tuid / to / subject w/o end",
in_from_tuid_to_subj_b1, out_from_tuid_to_subj_b1, REGULAR );
+
+
+ scc in_from_to_b2[] = FROM R_TO "\r";
+ fulltests( "from / to w/o lf", in_from_to_b2, in_from_to_b2, AS_IS );
+ scc out_from_to_b2[] = FROM TO OUT_TUID "\r";
+ fulltests( "from / to w/o lf", in_from_to_b2, out_from_to_b2, ADD_TUID
);
+ scc in_from_tuid_to_b2[] = FROM IN_TUID R_TO "\r";
+ scc out_from_tuid_to_b2[] = FROM OUT_TUID R_TO "\r";
+ fulltests( "from / tuid / to w/o lf", in_from_tuid_to_b2,
out_from_tuid_to_b2, ADD_TUID );
+ scc in_from_to_tuid_b2[] = FROM TO R_IN_TUID "\r";
+ fulltests( "from / to / tuid w/o lf", in_from_to_tuid_b2,
out_from_to_tuid_b1, ADD_TUID );
+
+ mintests( "from / to w/o lf", in_from_to_b2, out_from_to_ph, REGULAR );
+ mintests( "from / tuid / to w/o lf", in_from_tuid_to_b2,
out_from_tuid_to_ph, REGULAR );
+ scc in_from_subj_to_b2[] = FROM SUBJECT R_TO "\r";
+ mintests( "from / subject / to w/o lf", in_from_subj_to_b2,
out_from_subj_to, REGULAR );
+ scc in_from_subj_tuid_to_b2[] = FROM SUBJECT IN_TUID R_TO "\r";
+ mintests( "from / subject / tuid / to w/o lf", in_from_subj_tuid_to_b2,
out_from_subj_tuid_to, REGULAR );
+ scc in_from_subj_to_tuid_b2[] = FROM SUBJECT TO R_IN_TUID "\r";
+ mintests( "from / subject / to / tuid w/o lf", in_from_subj_to_tuid_b2,
out_from_subj_to_tuid_b1, REGULAR );
+ scc in_from_tuid_subj_to_b2[] = FROM IN_TUID SUBJECT R_TO "\r";
+ mintests( "from / tuid / subject / to w/o lf", in_from_tuid_subj_to_b2,
out_from_tuid_subj_to, REGULAR );
+ scc in_from_tuid_to_subj_b2[] = FROM IN_TUID TO R_SUBJECT "\r";
+ mintests( "from / tuid / to / subject w/o lf", in_from_tuid_to_subj_b2,
out_from_tuid_to_subj_b1, REGULAR );
+
+
+ scc in_from_to_b3[] = FROM R_TO;
+ fulltests( "from / to w/o crlf", in_from_to_b3, in_from_to_b3, AS_IS );
+ fulltests( "from / to w/o crlf", in_from_to_b3, out_from_to_b1,
ADD_TUID );
+ scc in_from_tuid_to_b3[] = FROM IN_TUID R_TO;
+ scc out_from_tuid_to_b3[] = FROM OUT_TUID R_TO;
+ fulltests( "from / tuid / to w/o crlf", in_from_tuid_to_b3,
out_from_tuid_to_b3, ADD_TUID );
+ scc in_from_to_tuid_b3[] = FROM TO R_IN_TUID;
+ fulltests( "from / to / tuid w/o crlf", in_from_to_tuid_b3,
out_from_to_tuid_b1, ADD_TUID );
+
+ mintests( "from / to w/o crlf", in_from_to_b3, out_from_to_ph, REGULAR
);
+ mintests( "from / tuid / to w/o crlf", in_from_tuid_to_b3,
out_from_tuid_to_ph, REGULAR );
+ scc in_from_subj_to_b3[] = FROM SUBJECT R_TO;
+ mintests( "from / subject / to w/o crlf", in_from_subj_to_b3,
out_from_subj_to, REGULAR );
+ scc in_from_subj_tuid_to_b3[] = FROM SUBJECT IN_TUID R_TO;
+ mintests( "from / subject / tuid / to w/o crlf",
in_from_subj_tuid_to_b3, out_from_subj_tuid_to, REGULAR );
+ scc in_from_subj_to_tuid_b3[] = FROM SUBJECT TO R_IN_TUID;
+ mintests( "from / subject / to / tuid w/o crlf",
in_from_subj_to_tuid_b3, out_from_subj_to_tuid_b1, REGULAR );
+ scc in_from_tuid_subj_to_b3[] = FROM IN_TUID SUBJECT R_TO;
+ mintests( "from / tuid / subject / to w/o crlf",
in_from_tuid_subj_to_b3, out_from_tuid_subj_to, REGULAR );
+ scc in_from_tuid_to_subj_b3[] = FROM IN_TUID TO R_SUBJECT;
+ mintests( "from / tuid / to / subject w/o crlf",
in_from_tuid_to_subj_b3, out_from_tuid_to_subj_b1, REGULAR );
+
return 0;
}
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