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hamradioversion3.0examsandprograms1992.iso
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9q920411
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session.c
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C/C++ Source or Header
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1992-04-09
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9KB
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441 lines
/* NOS User Session control
* Copyright 1991 Phil Karn, KA9Q
*/
#include <stdio.h>
#include "global.h"
#include "mbuf.h"
#include "proc.h"
#include "ftpcli.h"
#include "icmp.h"
#include "telnet.h"
#include "tty.h"
#include "session.h"
#include "hardware.h"
#include "socket.h"
#include "cmdparse.h"
#include "commands.h"
#include "main.h"
struct session *Sessions;
struct session *Command;
struct session *Current;
struct session *Lastcurr;
int Row;
int Morewait;
char Notval[] = "Not a valid control block\n";
static char Badsess[] = "Invalid session\n";
char *Sestypes[] = {
"",
"Telnet",
"FTP",
"AX25",
"Finger",
"Ping",
"NET/ROM",
"Command",
"More",
"Hopcheck",
"Tip",
"PPP PAP",
"Dial",
"Query",
"Cache"
};
/* Convert a character string containing a decimal session index number
* into a pointer. If the arg is NULLCHAR, use the current default session.
* If the index is out of range or unused, return NULLSESSION.
*/
struct session *
sessptr(cp)
char *cp;
{
register struct session *sp;
unsigned int i;
if(cp == NULLCHAR){
sp = Lastcurr;
} else {
i = (unsigned)atoi(cp);
if(i >= Nsessions)
sp = NULLSESSION;
else
sp = &Sessions[i];
}
if(sp == NULLSESSION || sp->type == FREE)
sp = NULLSESSION;
return sp;
}
/* Select and display sessions */
int
dosession(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
struct sockaddr fsocket;
int i,k,s;
int r,t;
char *cp;
sp = (struct session *)p;
if(argc > 1){
if((sp = sessptr(argv[1])) != NULLSESSION){
go(0,NULL,sp);
} else
tprintf("Session %s not active\n",argv[1]);
return 0;
}
tprintf(" # S# Type Rcv-Q Snd-Q State Remote socket\n");
for(sp=Sessions; sp < &Sessions[Nsessions];sp++){
if(sp->type == FREE || sp->type == COMMAND)
continue;
/* Rcv-Q includes output pending at the screen driver */
r = socklen(sp->output,1);
t = 0;
cp = NULLCHAR;
if((s = sp->s) != -1){
i = SOCKSIZE;
s = sp->s;
k = getpeername(s,(char *)&fsocket,&i);
r += socklen(s,0);
t += socklen(s,1);
cp = sockstate(s);
}
tprintf("%c", (Lastcurr == sp)? '*':' ');
tprintf("%-3u", (unsigned)(sp - Sessions));
tprintf("%-4d%-8s%6d%6d %-13s",
s,
Sestypes[sp->type],
r,
t,
(cp != NULLCHAR) ? cp : "");
if(sp->name != NULLCHAR)
tprintf("%s ",sp->name);
if(sp->s != -1 && k == 0)
tprintf("(%s)",psocket(&fsocket));
tprintf("\n");
if(sp->type == FTP && (s = sp->cb.ftp->data) != -1){
/* Display data channel, if any */
i = SOCKSIZE;
k = getpeername(s,(char *)&fsocket,&i);
r = socklen(s,0);
t = socklen(s,1);
cp = sockstate(s);
tprintf(" %-4d%-8s%6d%6d %-13s%s",
s,
Sestypes[sp->type],
r,
t,
(cp != NULLCHAR) ? cp : "",
(sp->name != NULLCHAR) ? sp->name : "");
if(k == 0)
tprintf(" (%s)",psocket(&fsocket));
if(tprintf("\n") == EOF)
break;
}
if(sp->rfile != NULLCHAR)
tprintf(" Record: %s\n",sp->rfile);
if(sp->ufile != NULLCHAR)
tprintf(" Upload: %s\n",sp->ufile);
}
return 0;
}
/* Resume current session, and wait for it */
int
go(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
sp = (struct session *)p;
if(sp == NULLSESSION || sp->type == FREE || sp->type == COMMAND)
return 0;
Current = sp;
swapscreen(Command,sp);
psignal(sp,0);
return 0;
}
int
doclose(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
sp = (struct session *)p;
if(argc > 1)
sp = sessptr(argv[1]);
if(sp == NULLSESSION){
tprintf(Badsess);
return -1;
}
shutdown(sp->s,1);
return 0;
}
int
doreset(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
sp = (struct session *)p;
if(argc > 1)
sp = sessptr(argv[1]);
if(sp == NULLSESSION){
tprintf(Badsess);
return -1;
}
/* Unwedge anyone waiting for a domain resolution, etc */
alert(sp->proc,EABORT);
shutdown(sp->s,2);
if(sp->type == FTP)
shutdown(sp->cb.ftp->data,2);
return 0;
}
int
dokick(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
sp = (struct session *)p;
if(argc > 1)
sp = sessptr(argv[1]);
if(sp == NULLSESSION){
tprintf(Badsess);
return -1;
}
sockkick(sp->s);
if(sp->type == FTP)
sockkick(sp->cb.ftp->data);
return 0;
}
struct session *
newsession(name,type,makecur)
char *name;
int type;
int makecur;
{
register struct session *sp;
int i;
for(i=0,sp=Sessions;i < Nsessions;sp++,i++)
if(sp->type == FREE)
break;
if(i == Nsessions)
return NULLSESSION;
sp->type = type;
sp->s = -1;
if(name != NULLCHAR)
sp->name = strdup(name);
sp->proc = Curproc;
/* Create standard input and output sockets. Output is
* translated to local end-of-line by default
*/
Curproc->input = sp->input = socket(AF_LOCAL,SOCK_STREAM,0);
seteol(Curproc->input,Eol);
sockmode(Curproc->input,SOCK_BINARY);
Curproc->output = sp->output = socket(AF_LOCAL,SOCK_STREAM,0);
seteol(Curproc->output,Eol);
sockmode(Curproc->output,SOCK_ASCII);
/* on by default */
sp->ttystate.crnl = sp->ttystate.edit = sp->ttystate.echo = 1;
sp->flowmode = 1; /* On by default */
sp->row = MOREROWS;
sp->morewait = 0;
newscreen(sp);
if(makecur){
swapscreen(Current,sp);
Current = sp;
}
return sp;
}
void
freesession(sp)
struct session *sp;
{
if(sp == NULLSESSION)
return;
pwait(NULL); /* Wait for any pending output to go */
rflush();
if(sp->proc1 != NULLPROC)
killproc(sp->proc1);
sp->proc1 = NULLPROC;
if(sp->proc2 != NULLPROC)
killproc(sp->proc2);
sp->proc2 = NULLPROC;
free_p(sp->ttystate.line);
sp->ttystate.line = NULLBUF;
if(sp->s != -1)
close_s(sp->s);
if(sp->record != NULLFILE){
fclose(sp->record);
sp->record = NULLFILE;
}
free(sp->rfile);
sp->rfile = NULLCHAR;
if(sp->upload != NULLFILE){
fclose(sp->upload);
sp->upload = NULLFILE;
}
free(sp->ufile);
sp->ufile = NULLCHAR;
free(sp->name);
sp->name = NULLCHAR;
sp->type = FREE;
close_s(sp->input);
sp->input = -1;
sp->proc->input = -1;
close_s(sp->output);
sp->output = -1;
sp->proc->output = -1;
freescreen(sp);
if(Current == sp){
Current = Command;
swapscreen(NULLSESSION,Command);
alert(Display,1);
}
if(Lastcurr == sp)
Lastcurr = NULLSESSION;
}
/* Control session recording */
int
dorecord(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
char *mode;
sp = (struct session *)p;
if(sp == NULLSESSION){
tprintf("No current session\n");
return 1;
}
if(argc > 1){
if(sp->rfile != NULLCHAR){
fclose(sp->record);
free(sp->rfile);
sp->record = NULLFILE;
sp->rfile = NULLCHAR;
}
/* Open new record file, unless file name is "off", which means
* disable recording
*/
if(strcmp(argv[1],"off") != 0){
if(sockmode(sp->output,-1) == SOCK_ASCII)
mode = APPEND_TEXT;
else
mode = APPEND_BINARY;
if((sp->record = fopen(argv[1],mode)) == NULLFILE)
tprintf("Can't open %s: %s\n",argv[1],sys_errlist[errno]);
else
sp->rfile = strdup(argv[1]);
}
}
if(sp->rfile != NULLCHAR)
tprintf("Recording into %s\n",sp->rfile);
else
tprintf("Recording off\n");
return 0;
}
/* Control file transmission */
int
doupload(argc,argv,p)
int argc;
char *argv[];
void *p;
{
register struct session *sp;
sp = (struct session *)p;
if(sp == NULLSESSION){
tprintf("No current session\n");
return 1;
}
if(argc < 2){
if(sp->ufile != NULLCHAR)
tprintf("Uploading %s\n",sp->ufile);
else
tprintf("Uploading off\n");
return 0;
}
if(strcmp(argv[1],"stop") == 0 && sp->upload != NULLFILE){
/* Abort upload */
fclose(sp->upload);
sp->upload = NULLFILE;
free(sp->ufile);
sp->ufile = NULLCHAR;
killproc(sp->proc2);
sp->proc2 = NULLPROC;
return 0;
}
/* Open upload file */
if((sp->upload = fopen(argv[1],READ_TEXT)) == NULLFILE){
tprintf("Can't read %s: %s\n",argv[1],sys_errlist[errno]);
return 1;
}
sp->ufile = strdup(argv[1]);
/* All set, invoke the upload process */
sp->proc2 = newproc("upload",1024,upload,0,sp,NULL,0);
return 0;
}
/* File uploading task */
void
upload(unused,sp1,p)
int unused;
void *sp1;
void *p;
{
struct session *sp;
int oldf;
char *buf;
sp = (struct session *)sp1;
/* Disable newline buffering for the duration */
oldf = setflush(sp->s,-1);
buf = mallocw(BUFSIZ);
while(fgets(buf,BUFSIZ,sp->upload) != NULLCHAR)
if(usputs(sp->s,buf) == EOF)
break;
free(buf);
usflush(sp->s);
setflush(sp->s,oldf);
fclose(sp->upload);
sp->upload = NULLFILE;
free(sp->ufile);
sp->ufile = NULLCHAR;
sp->proc2 = NULLPROC;
}