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-rw-r--r--src/modules/m_ident.cpp210
1 files changed, 208 insertions, 2 deletions
diff --git a/src/modules/m_ident.cpp b/src/modules/m_ident.cpp
index f61b4e73a..cc25a484c 100644
--- a/src/modules/m_ident.cpp
+++ b/src/modules/m_ident.cpp
@@ -16,28 +16,234 @@
#include <stdio.h>
#include <string>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
#include "users.h"
#include "channels.h"
#include "modules.h"
+#include "inspircd.h"
/* $ModDesc: Provides support for RFC 1413 ident lookups */
Server *Srv;
-
+
+class RFC1413
+{
+ protected:
+ int fd;
+ userrec* u;
+ sockaddr_in addr;
+ in_addr addy;
+ int state;
+ char ibuf[MAXBUF];
+ sockaddr_in sock_us;
+ sockaddr_in sock_them;
+ socklen_t uslen;
+ socklen_t themlen;
+ int nrecv;
+ time_t timeout_end;
+ bool timeout;
+ public:
+ bool Connect(userrec* user, int maxtime)
+ {
+ timeout_end = time(NULL)+maxtime;
+ timeout = false;
+ if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
+ {
+ Srv->Log(DEBUG,"Ident: socket failed for: "+std::string(user->ip));
+ return false;
+ }
+ inet_aton(user->ip,&addy);
+ addr.sin_family = AF_INET;
+ addr.sin_addr = addy;
+ addr.sin_port = htons(113);
+
+ int flags;
+ flags = fcntl(this->fd, F_GETFL, 0);
+ fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
+
+ if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
+ {
+ if (errno != EINPROGRESS)
+ {
+ Srv->Log(DEBUG,"Ident: connect failed for: "+std::string(user->ip));
+ return false;
+ }
+ }
+ Srv->Log(DEBUG,"Ident: successful connect associated with user "+std::string(user->nick));
+ this->u = user;
+ this->state = 1;
+ return true;
+ }
+
+ bool Poll()
+ {
+ if (time(NULL) > timeout_end)
+ {
+ timeout = true;
+ Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Could not find your ident, using "+std::string(u->ident)+" instead.");
+ return false;
+ }
+ pollfd polls;
+ polls.fd = this->fd;
+ if (state == 1)
+ {
+ polls.events = POLLOUT;
+ }
+ else
+ {
+ polls.events = POLLIN;
+ }
+ int ret = poll(&polls,1,1);
+
+ if (ret > 0)
+ {
+ switch (this->state)
+ {
+ case 1:
+ Srv->Log(DEBUG,"*** IDENT IN STATE 1");
+ uslen = sizeof(sock_us);
+ themlen = sizeof(sock_them);
+ if ((getsockname(this->u->fd,(sockaddr*)&sock_us,&uslen) || getpeername(this->u->fd, (sockaddr*)&sock_them, &themlen)))
+ {
+ Srv->Log(DEBUG,"Ident: failed to get socket names, bailing to state 3");
+ state = 3;
+ }
+ else
+ {
+ // send the request in the following format: theirsocket,oursocket
+ Write(this->fd,"%d,%d",ntohs(sock_them.sin_port),ntohs(sock_us.sin_port));
+ Srv->Log(DEBUG,"Sent ident request, moving to state 2");
+ state = 2;
+ }
+ break;
+ case 2:
+ Srv->Log(DEBUG,"*** IDENT IN STATE 2");
+ nrecv = recv(this->fd,ibuf,sizeof(ibuf),0);
+ if (nrecv > 0)
+ {
+ // we have the response line in the following format:
+ // 6193, 23 : USERID : UNIX : stjohns
+ // 6195, 23 : ERROR : NO-USER
+ ibuf[nrecv] = '\0';
+ Srv->Log(DEBUG,"Received ident response: "+std::string(ibuf));
+ close(this->fd);
+ shutdown(this->fd,2);
+ char* savept;
+ char* section = strtok_r(ibuf,":",&savept);
+ while (section)
+ {
+ if (strstr(section,"USERID"))
+ {
+ section = strtok_r(NULL,":",&savept);
+ if (section)
+ {
+ // ID type, usually UNIX or OTHER... we dont want it, so read the next token
+ section = strtok_r(NULL,":",&savept);
+ if (section)
+ {
+ while ((*section == ' ') && (strlen(section)>0)) section++; // strip leading spaces
+ if ((section[strlen(section)-1] == 13) || (section[strlen(section)-1] == 10))
+ section[strlen(section)-1] = '\0'; // strip carriage returns
+ if ((section[strlen(section)-1] == 13) || (section[strlen(section)-1] == 10))
+ section[strlen(section)-1] = '\0'; // strip linefeeds
+ while ((section[strlen(section)-1] == ' ') && (strlen(section)>0)) // strip trailing spaces
+ section[strlen(section)-1] = '\0';
+ if (strlen(section))
+ {
+ strlcpy(u->ident,section,IDENTMAX);
+ Srv->Log(DEBUG,"IDENT SET: "+std::string(u->ident));
+ Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Found your ident: "+std::string(u->ident));
+ }
+ break;
+ }
+ }
+ }
+ section = strtok_r(NULL,":",&savept);
+ }
+ state = 3;
+ }
+ break;
+ case 3:
+ Srv->Log(DEBUG,"Ident lookup is complete!");
+ break;
+ default:
+ Srv->Log(DEBUG,"Ident: invalid ident state!!!");
+ break;
+ }
+ }
+ }
+
+ bool Done()
+ {
+ return ((state == 3) || (timeout == true));
+ }
+};
+
class ModuleIdent : public Module
{
+
+ ConfigReader* Conf;
+ int IdentTimeout;
+
public:
+ void ReadSettings()
+ {
+ Conf = new ConfigReader;
+ IdentTimeout = Conf->ReadInteger("ident","timeout",0,true);
+ delete Conf;
+ }
+
ModuleIdent()
{
Srv = new Server;
+ ReadSettings();
+ }
+
+ virtual void OnRehash()
+ {
+ ReadSettings();
}
virtual void OnUserRegister(userrec* user)
{
+ RFC1413* ident = new RFC1413;
+ Srv->SendServ(user->fd,"NOTICE "+std::string(user->nick)+" :*** Looking up your ident...");
+ if (ident->Connect(user,IdentTimeout))
+ {
+ user->Extend("ident_data",(char*)ident);
+ ident->Poll();
+ }
+ else
+ {
+ Srv->SendServ(user->fd,"NOTICE "+std::string(user->nick)+" :*** Could not look up your ident.");
+ delete ident;
+ }
}
- virtual bool OnUserReady(userrec* user)
+ virtual bool OnCheckReady(userrec* user)
{
+ RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
+ if (ident)
+ {
+ ident->Poll();
+ if (ident->Done())
+ {
+ Srv->Log(DEBUG,"Ident: removing ident gubbins");
+ user->Shrink("ident_data");
+ delete ident;
+ return true;
+ }
+ return false;
+ }
return true;
}