ndial.c

PPP协议C语言源代码

#include "net.h"
#include "local.h"
#include "support.h"
#include "script.h"

/*
** * * * * * *
** ussDial()    Perform a dial script in blocking mode
**
** int ussDial(int netno, const char *script);
**
** PARAMETERS:
**   (in) int netno             A network number
**   (in) const char *script    A dial script
**
** RETURNS
**   0                          Success
**  -1                          Failure
**
** DESCRIPTION:
**  This function will perform a dial script in blocking mode.
** * * * * * *
*/
int ussDial(int netno, const char *script)
{
    struct NET *netp;
    int status;

    if (netno < 0 || netno >= NNETS) {
#if NTRACE
        Nprintf("Ndial: Network number not valid\n");
#endif
        return -1;
    }

   /* This routine only works with serial devices */
    netp = &nets[netno];
    if (netp->protoc[0] != SLIP && netp->protoc[0] != PPP) {
#if NTRACE
        Nprintf("Ndial: Interface not SLIP or PPP\n");
#endif
        return -1;
    }

   /* Do script opertaions until the status is finished, good or bad */
    ussScriptInit(netno, script);
    do {
        status = ussScriptTimeout(netno);
        
    } while (status == 0);

   /* If the status is success (1), return 0; else return status (-1) */
    return (status == 1) ? 0 : status;
}


/*
** * * * * * *
** Ndial()  Perform dial-out or dial-down operation
**
** int Ndial(int netno, char *phonenumber
**
** PARAMETERS:
**   (in) int netno             a yfnet network number
**   (in) char *phonenumber     a pointer to an ASCII phone number string
**
** DESCRIPTION:
**   This function will dial down if phonenumber == 0.  Otherwise, this
**   function will dial out to the phonenumber.
** * * * * * *
*/
int Ndial(int netno,char *phonenumber)
{
    const char *script;

   /* If phone number is defined, dial out */
    if (phonenumber) {
        ussScriptPhoneNum = phonenumber;
        script = ussDialScrTable[ussDialIxOutE];
    }
   /* Else dial down */
    else
        script = ussDialScrTable[ussDialIxDownE];

    return ussDial(netno, script);
}