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You can now configure a login for Telnet NSH session -- from Darcy Gong

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5231 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2012-10-12 16:59:17 +00:00
parent f90c8836c0
commit 9c58ee4a6f
6 changed files with 208 additions and 23 deletions
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110
nshlib/nsh_telnetd.c
View File

@@ -43,6 +43,7 @@
#include <unistd.h>
#include <assert.h>
#include <debug.h>
#include <string.h>
#include <apps/netutils/telnetd.h>
@@ -55,6 +56,18 @@
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_NSH_TELNET_LOGIN
# define TELNET_IAC 255
# define TELNET_WILL 251
# define TELNET_WONT 252
# define TELNET_DO 253
# define TELNET_DONT 254
# define TELNET_USE_ECHO 1
# define TELNET_NOTUSE_ECHO 0
#endif /* CONFIG_NSH_TELNET_LOGIN */
/****************************************************************************
* Private Types
****************************************************************************/
@@ -75,6 +88,91 @@
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_telnetecho
****************************************************************************/
#ifdef CONFIG_NSH_TELNET_LOGIN
void nsh_telnetecho(struct console_stdio_s *pstate, uint8_t is_use)
{
uint8_t optbuf[4];
optbuf[0] = TELNET_IAC;
optbuf[1] = (is_use == TELNET_USE_ECHO) ? TELNET_WILL : TELNET_DO;
optbuf[2] = 1;
optbuf[3] = 0;
fputs((char *)optbuf, pstate->cn_outstream);
fflush(pstate->cn_outstream);
}
#endif
/****************************************************************************
* Name: nsh_telnetlogin
****************************************************************************/
#ifdef CONFIG_NSH_TELNET_LOGIN
int nsh_telnetlogin(struct console_stdio_s *pstate)
{
char username[16];
char password[16];
uint8_t i;
/* Present the NSH Telnet greeting */
fputs(g_telnetgreeting, pstate->cn_outstream);
fflush(pstate->cn_outstream);
/* Loop for the configured number of retries */
for(i = 0; i < CONFIG_NSH_TELNET_FAILCOUNT; i++)
{
/* Ask for the login username */
fputs(g_userprompt, pstate->cn_outstream);
fflush(pstate->cn_outstream);
if (fgets(pstate->cn_line, CONFIG_NSH_LINELEN, INSTREAM(pstate)) != NULL)
{
strcpy(username, pstate->cn_line);
username[strlen(pstate->cn_line) - 1] = 0;
}
/* Ask for the login password */
fputs(g_passwordprompt, pstate->cn_outstream);
fflush(pstate->cn_outstream);
nsh_telnetecho(pstate, TELNET_NOTUSE_ECHO);
if (fgets(pstate->cn_line, CONFIG_NSH_LINELEN, INSTREAM(pstate)) != NULL)
{
/* Verify the username and password */
strcpy(password,pstate->cn_line);
password[strlen(pstate->cn_line) - 1] = 0;
if (strcmp(password, CONFIG_NSH_TELNET_PASSWORD) == 0 &&
strcmp(username, CONFIG_NSH_TELNET_USERNAME) == 0)
{
fputs(g_loginsuccess, pstate->cn_outstream);
fflush(pstate->cn_outstream);
nsh_telnetecho(pstate, TELNET_USE_ECHO);
return OK;
}
else
{
fputs(g_badcredentials, pstate->cn_outstream);
fflush(pstate->cn_outstream);
}
}
nsh_telnetecho(pstate, TELNET_USE_ECHO);
}
/* Too many failed login attempts */
fputs(g_loginfailure, pstate->cn_outstream);
fflush(pstate->cn_outstream);
return -1;
}
#endif /* CONFIG_NSH_TELNET_LOGIN */
/****************************************************************************
* Public Functions
****************************************************************************/
@@ -90,7 +188,17 @@ int nsh_telnetmain(int argc, char *argv[])
dbg("Session [%d] Started\n", getpid());
/* Present a greeting */
/* Login User and Password Check */
#ifdef CONFIG_NSH_TELNET_LOGIN
if (nsh_telnetlogin(pstate) != OK)
{
nsh_exit(&pstate->cn_vtbl, 1);
return -1; /* nsh_exit does not return */
}
#endif /* CONFIG_NSH_TELNET_LOGIN */
/* Present the NSH greeting */
fputs(g_nshgreeting, pstate->cn_outstream);
fflush(pstate->cn_outstream);