/*
?*??ser2net?-?A?program?for?allowing?telnet?connection?to?serial?ports
?*??Copyright?（C）?2001??Corey?Minyard?
?*
?*??This?program?is?free?software;?you?can?redistribute?it?and/or?modify
?*??it?under?the?terms?of?the?GNU?General?Public?License?as?published?by
?*??the?Free?Software?Foundation;?either?version?2?of?the?License?or
?*??（at?your?option）?any?later?version.
?*
?*??This?program?is?distributed?in?the?hope?that?it?will?be?useful
?*??but?WITHOUT?ANY?WARRANTY;?without?even?the?implied?warranty?of
?*??MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the
?*??GNU?General?Public?License?for?more?details.
?*
?*??You?should?have?received?a?copy?of?the?GNU?General?Public?License
?*??along?with?this?program;?if?not?write?to?the?Free?Software
?*??Foundation?Inc.?59?Temple?Place?Suite?330?Boston?MA??02111-1307??USA
?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?“controller.h“
#include?“selector.h“
#include?“dataxfer.h“
#include?“utils.h“
#include?“telnet.h“


extern?selector_t?*ser2net_sel;

/**?baseD?ON?sshd.c?FROM?openssh.com?*/
#ifdef?HAVE_TCPD_H
#include?
int?allow_severity?=?LOG_INFO;
int?deny_severity?=?LOG_WARNING;
static?char?*progname?=?“ser2net-control“;
#endif?/*?HAVE_TCPD_H?*/

/*?This?file?holds?the?code?that?runs?the?control?port.?*/

static?int?acceptfd;	/*?The?file?descriptor?for?the?accept?port.?*/

static?int?max_controller_ports?=?4;	/*?How?many?control?connections
					???do?we?allow?at?a?time.?*/
static?int?num_controller_ports?=?0;	/*?How?many?control?connections
					???are?currently?active.?*/

#define?INBUF_SIZE?255	/*?The?size?of?the?maximum?input?command.?*/

char?*prompt?=?“->?“;

/*?This?data?structure?is?kept?for?each?control?connection.?*/
typedef?struct?controller_info?{
????int????????????tcpfd;		/*?When?connected?the?file
???????????????????????????????????????????descriptor?for?the?TCP
???????????????????????????????????????????port?used?for?I/O.?*/
????struct?sockaddr_in?remote;		/*?The?socket?address?of?who
					???is?connected?to?this?port.?*/

????unsigned?char?inbuf[INBUF_SIZE+1];	/*?Buffer?to?receive?command?on.?*/
????int??inbuf_count;			/*?The?number?of?bytes?currently
					???in?the?inbuf.?*/

????char?*outbuf;			/*?The?output?buffer?NULL?if
					???no?output.?*/
????int??outbufsize;			/*?Total?size?of?the?memory
					???allocated?in?outbuf.?*/
????int??outbuf_pos;			/*?The?current?position?in?the
					???output?buffer.?*/
????int??outbuf_count;			/*?The?number?of?bytes
					???（starting?at?outbuf_pos）
					???left?to?transmit.?*/

????void?*monitor_port_id;		/*?When?port?monitoring?this?is
					???the?id?given?when?the?monitoring
					???is?started.??It?is?used?to?stop
					???monitoring.?*/

????struct?controller_info?*next;	/*?Used?to?keep?these?items?in
					???a?linked?list.?*/

???