From 9142e31a1baf77fd57bb13cb516e30c7e063a9d0 Mon Sep 17 00:00:00 2001
From: Michiel Broek <mbse@mbse.eu>
Date: Sun, 1 Feb 2004 15:06:16 +0000
Subject: [PATCH] Added experimental incoming code

---
 mbcico/Makefile  |  2 +-
 mbcico/session.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++
 mbcico/telnet.c  |  9 ++++++
 3 files changed, 86 insertions(+), 1 deletion(-)

diff --git a/mbcico/Makefile b/mbcico/Makefile
index 270667d4..ec1e722e 100644
--- a/mbcico/Makefile
+++ b/mbcico/Makefile
@@ -135,7 +135,7 @@ scanout.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/reco
 emsi.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/common.h ../lib/nodelist.h ../lib/dbnode.h ../lib/clcomm.h ../lib/mberrors.h ttyio.h session.h statetbl.h config.h emsi.h emsidat.h hydra.h rdoptions.h tcp.h wazoo.h inbound.h
 ulock.o: ../config.h ../lib/libs.h ../lib/clcomm.h
 callstat.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/clcomm.h ../lib/common.h callstat.h
-session.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/common.h ../lib/clcomm.h ../lib/nodelist.h ../lib/mberrors.h ttyio.h statetbl.h emsi.h ftsc.h session.h yoohoo.h mbcico.h binkp.h callstat.h inbound.h opentcp.h
+session.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/common.h ../lib/clcomm.h ../lib/nodelist.h ../lib/mberrors.h ttyio.h statetbl.h emsi.h ftsc.h session.h yoohoo.h mbcico.h binkp.h callstat.h inbound.h opentcp.h telnet.h
 call.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/common.h ../lib/nodelist.h ../lib/clcomm.h ../lib/dbnode.h ../lib/mberrors.h session.h callstat.h call.h config.h dial.h lutil.h portsel.h openport.h opentcp.h rdoptions.h inbound.h
 mbcico.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/common.h ../lib/nodelist.h ../lib/clcomm.h ../lib/dbcfg.h ../lib/dbnode.h ../lib/dbftn.h ../lib/mberrors.h config.h answer.h call.h lutil.h mbcico.h session.h
 outstat.o: ../config.h ../lib/libs.h ../lib/structs.h ../lib/users.h ../lib/records.h ../lib/common.h ../lib/nodelist.h ../lib/clcomm.h ../lib/dbcfg.h ../lib/dbnode.h ../lib/dbftn.h ../lib/mberrors.h scanout.h callstat.h outstat.h
diff --git a/mbcico/session.c b/mbcico/session.c
index e84c5089..f635b5ab 100644
--- a/mbcico/session.c
+++ b/mbcico/session.c
@@ -48,6 +48,7 @@
 #include "callstat.h"
 #include "inbound.h"
 #include "opentcp.h"
+#include "telnet.h"
 
 
 extern int	tcp_mode;
@@ -86,6 +87,10 @@ int session(faddr *a, node *nl, int role, int tp, char *dt)
 {
     int	    rc = MBERR_OK, addrlen = sizeof(struct sockaddr_in);
     fa_list *tmpl;
+#ifdef USE_EXPERIMENT
+    int	    Fdo, input_pipe[2], output_pipe[2];
+    pid_t   fpid;
+#endif
 
     session_flags = 0;
     type = tp;
@@ -113,6 +118,77 @@ int session(faddr *a, node *nl, int role, int tp, char *dt)
 #ifdef USE_EXPERIMENT
 	if ((tcp_mode == TCPMODE_ITN) && (role == 0)) {
 	    Syslog('-', "Will need to install telnet receiver thread");
+
+	    /*
+	     * First make sure the current input socket gets a new file descriptor
+	     * since it's now on stadin and stdout.
+	     */
+	    Fdo = dup(0);
+	    Syslog('s', "session: new socket %s", Fdo);
+
+	     /*
+	      * Close stdin and stdout so that when we create the pipes to
+	      * the telnet filter they get stdin and stdout as file descriptors.
+	      */
+	    fflush(stdin);
+	    fflush(stdout);
+	    setbuf(stdin,NULL);
+	    setbuf(stdout, NULL);
+	    close(0);
+	    close(1);
+
+	    /*
+	     * Create output pipe and start output filter.
+	     */
+	    if (pipe(output_pipe) == -1) {
+		WriteError("$could not create output_pipe");
+		die(MBERR_TTYIO_ERROR);
+	    }
+	    fpid = fork();
+	    switch (fpid) {
+		case -1:    WriteError("fork for telout_filter failed");
+			    die(MBERR_TTYIO_ERROR);
+		case 0:     if (close(output_pipe[1]) == -1) {
+				WriteError("$error close output_pipe[1]");
+				die(MBERR_TTYIO_ERROR);
+			    }
+			    telout_filter(output_pipe[0], Fdo);
+			    /* NOT REACHED */
+	    }
+	    if (close(output_pipe[0] == -1)) {
+		WriteError("$error close output_pipe[0]");
+		die(MBERR_TTYIO_ERROR);
+	    }
+	    Syslog('s', "telout_filter forked with pid %d", fpid);
+	
+	    /*
+	     * Create input pipe and start input filter
+	     */
+	    if (pipe(input_pipe) == -1) {
+		WriteError("$could not create input_pipe");
+		die(MBERR_TTYIO_ERROR);
+	    }
+	    fpid = fork();
+	    switch (fpid) {
+		case -1:    WriteError("fork for telin_filter failed");
+			    die(MBERR_TTYIO_ERROR);
+		case 0:     if (close(input_pipe[0]) == -1) {
+				WriteError("$error close input_pipe[0]");
+				die(MBERR_TTYIO_ERROR);
+			    }
+			    telin_filter(input_pipe[1], Fdo);
+			    /* NOT REACHED */
+	    }
+	    if (close(input_pipe[1]) == -1) {
+		WriteError("$error close input_pipe[1]");
+		die(MBERR_TTYIO_ERROR);
+	    }
+	    Syslog('s', "telin_filter forked with pid %d", fpid);
+
+	    Syslog('s', "stdout = %d", output_pipe[1]);
+	    Syslog('s', "stdin  = %d", input_pipe[0]);
+
+	    telnet_init(Fdo);
 	}
 #endif
     }
diff --git a/mbcico/telnet.c b/mbcico/telnet.c
index 8a83c0d7..8828a038 100644
--- a/mbcico/telnet.c
+++ b/mbcico/telnet.c
@@ -40,11 +40,17 @@
 #include "telnet.h"
 
 
+/*
+ * Telnet I/O filters. See RFC854 for details.
+ */
 
 
 #ifdef USE_EXPERIMENT
 
 
+/*
+ * Send options to the remote.
+ */
 void telnet_init(int Fd)
 {
     Syslog('s', "telnet_init(%d)", Fd);
@@ -58,6 +64,9 @@ void telnet_init(int Fd)
 
 
 
+/*
+ * Answer options requested by remote.
+ */
 void telnet_answer(int tag, int opt, int Fd)
 {
     char    buf[3];