Module: ngircd.git Branch: master Commit: 2a4bf67aaceebd3567dcd0ac1db2b9027560f574 URL: http://ngircd.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git&a=commit;h=2a4bf...

Author: Alexander Barton alex@barton.de Date: Tue Aug 17 21:05:06 2010 +0200

Implement user mode "x": hostname cloaking (closes: #102)

When a client has user mode "x" set, its real hostname is cloaked by substituting it with the server name (as configured in ngircd.conf).

Restricted clients (user mode "r") aren't allowed to change mode "x".

Please note that hostname cloaking is only in effect in server-client communication! The server still uses the real hostname for its own logging and for all server-server communication -- therefore all servers in the network must support user mode "x" to prevent older servers from leaking the real hostname of a cloaked client!

---

src/ngircd/defines.h | 2 +- src/ngircd/irc-mode.c | 10 ++++++++++ 2 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/src/ngircd/defines.h b/src/ngircd/defines.h index 579d552..01b6037 100644 --- a/src/ngircd/defines.h +++ b/src/ngircd/defines.h @@ -80,7 +80,7 @@ #define RECONNECT_DELAY 3 /* Time to delay re-connect attempts in seconds. */

-#define USERMODES "aciorsw" /* Supported user modes. */ +#define USERMODES "aciorswx" /* Supported user modes. */ #define CHANMODES "biIklmnoPstvz" /* Supported channel modes. */

#define CONNECTED true /* Internal status codes. */ diff --git a/src/ngircd/irc-mode.c b/src/ngircd/irc-mode.c index 45defeb..df464a7 100644 --- a/src/ngircd/irc-mode.c +++ b/src/ngircd/irc-mode.c @@ -185,6 +185,7 @@ Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target ) ERR_NOPRIVILEGES_MSG, Client_ID(Origin)); break; + case 'o': /* IRC operator (only unsettable!) */ if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER )) { @@ -199,6 +200,15 @@ Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target ) else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin )); break;

+ case 'x': /* Cloak hostname */ + if (Client_HasMode(Client, 'r')) + IRC_WriteStrClient(Origin, + ERR_RESTRICTED_MSG, + Client_ID(Origin)); + else + x[0] = 'x'; + break; + default: Log( LOG_DEBUG, "Unknown mode "%c%c" from "%s"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin )); if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );