source: rtems/c/src/libnetworking/rtems_servers/telnetd.c @ b2712e3

4.104.114.84.95
Last change on this file since b2712e3 was b2712e3, checked in by Joel Sherrill <joel.sherrill@…>, on 05/24/01 at 21:58:39

2000-05-24 Fernando Ruiz Casas <fernando.ruiz@…>

  • monitor/mon-prmisc.c: Correct print line.
  • shell/Makefile.am: Added new file telnetd.c.
  • shell/telnetd.c, shell/telnetd.h, shell/pty.c: New files.
  • shell/shell.c, shell/cmds.c, shell/shell.h: Numerous improvments:
    • The shell_init has a new parameter 'forever' because in /dev/console you need that this process runs forever but in tcp/ip not. (respawn?)
    • A new task for every session opened trought tcp/ip telnet client. (the chargen,daytime and more are possible of implementation but I ask me if they are necesary)
    • Exit from the session delete the task and when the client fails too.
    • More cmds have been implemented. (very reduced version of these) umask, chmod, id, whoami, rm, cat, ...
    • A reduced line edit has been implemented.

Ctrl-C abort the input,
Ctrl-d in the first position gives EOF (logout).
'\b' and DEL makes the rubout operation.
I think that readline() for every session spents a lot of resources.
  • Property mode set to 100644
File size: 3.1 KB
Line 
1/*
2 *  $Id$
3 */
4
5#include <rtems.h>
6#include <rtems/error.h>
7#include <rtems/shell.h>
8#include <rtems/telnetd.h>
9#include <sys/socket.h>
10#include <netinet/in.h>
11#include <arpa/inet.h>
12#include <unistd.h>
13#include <stdlib.h>
14#include <stdio.h>
15/***********************************************************/
16rtems_id            telnetd_task_id      =0;
17rtems_unsigned32    telnetd_stack_size   =16384;
18rtems_task_priority telnetd_task_priority=100;
19/***********************************************************/
20rtems_task rtems_task_telnetd(rtems_task_argument task_argument) {
21        int des_socket,
22            acp_socket;
23        struct sockaddr_in srv;
24        char * devname;
25        int i=1;
26        int size_adr;
27        if ((des_socket=socket(PF_INET,SOCK_STREAM,0))<0) {
28                perror("socket");
29                rtems_task_delete(RTEMS_SELF);
30        };
31        setsockopt(des_socket,SOL_SOCKET,0,&i,sizeof(i));
32        memset(&srv,0,sizeof(srv));
33        srv.sin_family=AF_INET;
34        srv.sin_port=htons(23);
35        size_adr=sizeof(srv);
36        if ((bind(des_socket,(struct sockaddr *)&srv,size_adr))<0) {
37                perror("bind");
38                close(des_socket);
39                rtems_task_delete(RTEMS_SELF);
40        };
41        if ((listen(des_socket,5))<0) {
42                perror("listen");
43                close(des_socket);
44                rtems_task_delete(RTEMS_SELF);
45        };
46        do {
47          acp_socket=accept(des_socket,(struct sockaddr*)&srv,&size_adr);
48          if (acp_socket<0) {
49                perror("accept");
50                break;
51          };
52          if (devname = get_pty(acp_socket) ) {
53           shell_init(&devname[5],
54                      telnetd_stack_size,
55                      telnetd_task_priority,
56                      devname,B9600|CS8,FALSE);
57          } else {
58           close(acp_socket);
59          };
60        } while(1);
61        close(des_socket);
62        rtems_task_delete(RTEMS_SELF);
63}
64/***********************************************************/
65int rtems_initialize_telnetd(void) {
66        rtems_status_code sc;
67        if (telnetd_task_id         ) return RTEMS_RESOURCE_IN_USE;
68        if (telnetd_stack_size<=0   ) telnetd_stack_size   =16384;
69        if (telnetd_task_priority<=2) telnetd_task_priority=100;
70        sc=rtems_task_create(new_rtems_name("TLND"),
71                             100,RTEMS_MINIMUM_STACK_SIZE,     
72                             RTEMS_DEFAULT_MODES,
73                             RTEMS_DEFAULT_ATTRIBUTES,
74                             &telnetd_task_id);
75        if (sc!=RTEMS_SUCCESSFUL) {
76                rtems_error(sc,"creating task telnetd");
77                return (int)sc;
78        };
79        sc=rtems_task_start(telnetd_task_id,
80                            rtems_task_telnetd,
81                            (rtems_task_argument)NULL);
82        if (sc!=RTEMS_SUCCESSFUL) {
83                rtems_error(sc,"starting task telnetd");
84        };
85        return (int)sc;
86}
87/***********************************************************/
88int main_telnetd(int argc,char * argv[]) {
89        rtems_status_code sc;
90        if (telnetd_task_id) {
91                printf("ERROR:telnetd already started\n");
92                return 1;
93        };
94        if (argc>1) telnetd_stack_size   =str2int(argv[1]);
95        if (argc>2) telnetd_task_priority=str2int(argv[2]);
96        sc=rtems_initialize_telnetd();
97        if (sc!=RTEMS_SUCCESSFUL) return sc;
98        printf("rtems_telnetd() started with stacksize=%u,priority=%d\n",
99                        telnetd_stack_size,telnetd_task_priority);
100        return 0;
101}
102/***********************************************************/
103int register_telnetd(void) {
104        shell_add_cmd("telnetd","telnet","telnetd [stacksize [tsk_priority]]",main_telnetd);
105        return 0;
106}
107/***********************************************************/
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