-extern inline void
-ppp_stuff_char (struct ppp *ppp, register struct ppp_buffer *buf,
- register __u8 chr)
-{
-/*
- * The buffer should not be full.
- */
- if (ppp->flags & SC_DEBUG) {
- if ((buf->count < 0) || (buf->count > 3000))
- printk (KERN_DEBUG "ppp_stuff_char: %d %x\n",
- (unsigned int) buf->count,
- (unsigned int) chr);
- }
-/*
- * Update the FCS and if the character needs to be escaped, do it.
- */
- buf->fcs = PPP_FCS (buf->fcs, chr);
- if (in_xmap (ppp, chr)) {
- chr ^= PPP_TRANS;
- ins_char (buf, PPP_ESCAPE);
- }
-/*
- * Add the character to the buffer.
- */
- ins_char (buf, chr);
-}
-
-/*
- * Procedure to encode the data with the proper escaping and send the
- * data to the remote system.
- */
-
-static void
-ppp_dev_xmit_lower (struct ppp *ppp, struct ppp_buffer *buf,
- __u8 *data, int count, int non_ip)
-{
- __u16 write_fcs;
- int address, control;
- int proto;
-
- ++ppp->stats.ppp_opackets;
- ppp->stats.ppp_ooctects += count;
-
-/*
- * Insert the leading FLAG character
- */
- buf->count = 0;
-
- if (non_ip || flag_time == 0)
- ins_char (buf, PPP_FLAG);
- else {
- if (jiffies - ppp->last_xmit > flag_time)
- ins_char (buf, PPP_FLAG);
- }
- ppp->last_xmit = jiffies;
- buf->fcs = PPP_INITFCS;
-/*
- * Emit the address/control information if needed
- */
- address = PPP_ADDRESS (data);
- control = PPP_CONTROL (data);
- proto = PPP_PROTOCOL (data);
-
- if (address != PPP_ALLSTATIONS ||
- control != PPP_UI ||
- (ppp->flags & SC_COMP_AC) == 0) {
- ppp_stuff_char (ppp, buf, address);
- ppp_stuff_char (ppp, buf, control);
- }
-/*
- * Emit the protocol (compressed if possible)
- */
- if ((ppp->flags & SC_COMP_PROT) == 0 || (proto & 0xFF00))
- ppp_stuff_char (ppp, buf, proto >> 8);
-
- ppp_stuff_char (ppp, buf, proto);
-/*
- * Insert the data
- */
- data += 4;
- count -= 4;
-
- while (count-- > 0)
- ppp_stuff_char (ppp, buf, *data++);
-/*
- * Add the trailing CRC and the final flag character
- */
- write_fcs = buf->fcs ^ 0xFFFF;
- ppp_stuff_char (ppp, buf, write_fcs);
- ppp_stuff_char (ppp, buf, write_fcs >> 8);
-/*
- * Add the trailing flag character
- */
- ins_char (buf, PPP_FLAG);
-/*
- * Print the buffer
- */
- if (ppp->flags & SC_LOG_FLUSH)
- ppp_print_buffer ("ppp flush", buf_base (buf),
- buf->count);
-/*
- * Send the block to the tty driver.
- */
- ppp->stats.ppp_obytes += buf->count;
- ppp_kick_tty (ppp, buf);
-}
-
-/*
- * Send an frame to the remote with the proper bsd compression.
- *
- * Return 0 if frame was queued for transmission.
- * 1 if frame must be re-queued for later driver support.
- */
-
-static int
-ppp_dev_xmit_frame (struct ppp *ppp, struct ppp_buffer *buf,
- __u8 *data, int count)
-{
- int proto;
- int address, control;
- __u8 *new_data;
- int new_count;
-/*
- * Print the buffer
- */
- if (ppp->flags & SC_LOG_OUTPKT)
- ppp_print_buffer ("write frame", data, count);
-/*
- * Determine if the frame may be compressed. Attempt to compress the
- * frame if possible.
- */
- proto = PPP_PROTOCOL (data);
- address = PPP_ADDRESS (data);
- control = PPP_CONTROL (data);
-
- if (((ppp->flags & SC_COMP_RUN) != 0) &&
- (ppp->sc_xc_state != (void *) 0) &&
- (address == PPP_ALLSTATIONS) &&
- (control == PPP_UI) &&
- (proto != PPP_LCP) &&
- (proto != PPP_CCP)) {
- new_data = kmalloc (count, GFP_ATOMIC);
- if (new_data == NULL) {