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delay allocation of msgdata.msgid field

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this allows us to simplify the exit path of parse_fetch_rsp().
This commit is contained in:
Oswald Buddenhagen 2020-08-05 17:43:19 +02:00
parent b37d6b1c00
commit ec47c90554
1 changed files with 19 additions and 21 deletions
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40
src/drv_imap.c
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@ -1023,7 +1023,7 @@ parse_fetched_flags( list_t *list, uchar *flags, uchar *status )
}
static void
parse_fetched_header( char *val, uint uid, char **tuid, char **msgid )
parse_fetched_header( char *val, uint uid, char **tuid, char **msgid, uint *msgid_len )
{
char *end;
int off, in_msgid = 0;
@ -1059,7 +1059,8 @@ parse_fetched_header( char *val, uint uid, char **tuid, char **msgid )
in_msgid = 1;
continue;
}
*msgid = nfstrndup( val + off, (size_t)(len - off) );
*msgid = val + off;
*msgid_len = (uint)(len - off);
in_msgid = 0;
}
}
@ -1073,7 +1074,7 @@ parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
msg_data_t *msgdata;
imap_cmd_t *cmdp;
uchar mask = 0, status = 0;
uint uid = 0, need_uid = 0, size = 0;
uint uid = 0, need_uid = 0, size = 0, msgid_len = 0;
time_t date = 0;
if (!is_list( list )) {
@ -1084,49 +1085,49 @@ parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
for (tmp = list->child; tmp; tmp = tmp->next) {
if (!is_atom( tmp )) {
error( "IMAP error: bogus item name in FETCH response\n" );
goto ffail;
return LIST_BAD;
}
const char *name = tmp->val;
tmp = tmp->next;
if (!strcmp( "UID", name )) {
if (!is_atom( tmp ) || (uid = strtoul( tmp->val, &ep, 10 ), *ep)) {
error( "IMAP error: unable to parse UID\n" );
goto ffail;
return LIST_BAD;
}
continue; // This *is* the UID.
} else if (!strcmp( "FLAGS", name )) {
if (!is_list( tmp )) {
error( "IMAP error: unable to parse FLAGS\n" );
goto ffail;
return LIST_BAD;
}
if (!parse_fetched_flags( tmp->child, &mask, &status ))
goto ffail;
return LIST_BAD;
continue; // This may legitimately come without UID.
} else if (!strcmp( "INTERNALDATE", name )) {
if (!is_atom( tmp )) {
error( "IMAP error: unable to parse INTERNALDATE\n" );
goto ffail;
return LIST_BAD;
}
if ((date = parse_date( tmp->val )) == -1) {
error( "IMAP error: unable to parse INTERNALDATE format\n" );
goto ffail;
return LIST_BAD;
}
} else if (!strcmp( "RFC822.SIZE", name )) {
if (!is_atom( tmp ) || (size = strtoul( tmp->val, &ep, 10 ), *ep)) {
error( "IMAP error: unable to parse RFC822.SIZE\n" );
goto ffail;
return LIST_BAD;
}
} else if (!strcmp( "BODY[]", name ) || !strcmp( "BODY[HEADER]", name )) {
if (!is_atom( tmp )) {
error( "IMAP error: unable to parse BODY[]\n" );
goto ffail;
return LIST_BAD;
}
body = tmp;
} else if (!strcmp( "BODY[HEADER.FIELDS", name )) {
if (!is_list( tmp )) {
bfail:
error( "IMAP error: unable to parse BODY[HEADER.FIELDS ...]\n" );
goto ffail;
return LIST_BAD;
}
tmp = tmp->next;
if (!is_atom( tmp ) || strcmp( tmp->val, "]" ))
@ -1134,7 +1135,7 @@ parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
tmp = tmp->next;
if (!is_atom( tmp ))
goto bfail;
parse_fetched_header( tmp->val, uid, &tuid, &msgid );
parse_fetched_header( tmp->val, uid, &tuid, &msgid, &msgid_len );
}
need_uid = 1;
}
@ -1142,20 +1143,20 @@ parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
if (!uid) {
if (need_uid) {
error( "IMAP error: received payload without UID\n" );
goto ffail;
return LIST_BAD;
}
// Ignore async flag updates for now.
} else if ((cmdp = ctx->in_progress) && cmdp->param.lastuid) {
if (need_uid || (status & M_FLAGS)) {
error( "IMAP error: received extraneous data in response to UID query\n" );
goto ffail;
return LIST_BAD;
}
// Workaround for server not sending UIDNEXT and/or APPENDUID.
ctx->uidnext = uid + 1;
} else if (body) {
if (tuid || msgid) { // Only those that leak; ignore others.
error( "IMAP error: received extraneous data with full message\n" );
goto ffail;
return LIST_BAD;
}
for (cmdp = ctx->in_progress; cmdp; cmdp = cmdp->next)
if (cmdp->param.uid == uid)
@ -1178,16 +1179,13 @@ parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
cur->gen.flags = mask;
cur->gen.status = status;
cur->gen.size = size;
cur->gen.msgid = msgid;
if (msgid)
cur->gen.msgid = nfstrndup( msgid, msgid_len );
if (tuid)
memcpy( cur->gen.tuid, tuid, TUIDL );
}
return LIST_OK;
ffail:
free( msgid );
return LIST_BAD;
}
static void