debian/notmuch
1
0
Fork 0
mirror of https://git.notmuchmail.org/git/notmuch synced 2024-11-24 20:08:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix code extracting the MTA from Received: headers

Browse source 
The previous code made too many assumptions about the (sadly not
standardized) format of the Received headers. This version should
be more robust to deal with different variations.

Signed-off-by: Dirk Hohndel <hohndel@infradead.org>
This commit is contained in:
Dirk Hohndel 2010-04-07 13:38:29 -07:00 committed by Carl Worth
parent fec5622add
commit 569ecf8c16
1 changed files with 9 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
notmuch-reply.c
View file

@ -296,28 +296,23 @@ guess_from_received_header (notmuch_config_t *config, notmuch_message_t *message
received = notmuch_message_get_header (message, "received"); received = notmuch_message_get_header (message, "received");
by = strstr (received, " by "); by = strstr (received, " by ");
if (by && *(by+4)) { if (by && *(by+4)) {
/* we know that there are 4 characters after by - either the 4th one /* sadly, the format of Received: headers is a bit inconsistent,
* is '\0' (broken header) or it is the first letter of the hostname * depending on the MTA used. So we try to extract just the MTA
* that last received this email - which we'll use to guess the right * here by removing leading whitespace and assuming that the MTA
* from email address * name ends at the next whitespace
* we test for *(by+4) to be non-'\0' to make sure there's something
* there at all - and then assume that the first whitespace delimited
* token that follows is the last receiving server
*/ */
mta = strdup (by+4); mta = strdup (by+4);
if (mta == NULL) if (mta == NULL)
return NULL; return NULL;
token = strtok(mta," \t");
/* After the MTA comes its IP address (or HELO response) in parenthesis. if (token == NULL)
* so let's terminate the string there
*/
if ((ptr = strchr (mta, '(')) == NULL) {
free (mta);
return NULL; return NULL;
}
*ptr = '\0';
/* Now extract the last two components of the MTA host name /* Now extract the last two components of the MTA host name
* as domain and tld * as domain and tld
*/ */
token = mta;
while ((ptr = strsep (&token, delim)) != NULL) { while ((ptr = strsep (&token, delim)) != NULL) {
if (*ptr == '\0') if (*ptr == '\0')
continue; continue;