120 lines
4.4 KiB
C
120 lines
4.4 KiB
C
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/**
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* @file
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* Network Point to Point Protocol over Serial header file.
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*
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*/
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/*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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*/
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#include "lwip/opt.h"
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#if PPP_SUPPORT && PPPOS_SUPPORT /* don't build if not configured for use in lwipopts.h */
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#ifndef PPPOS_H
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#define PPPOS_H
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#include "lwip/sys.h"
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#include "lwip/sio.h"
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#include "ppp.h"
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#include "vj.h"
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/* PPP packet parser states. Current state indicates operation yet to be
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* completed. */
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enum {
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PDIDLE = 0, /* Idle state - waiting. */
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PDSTART, /* Process start flag. */
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PDADDRESS, /* Process address field. */
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PDCONTROL, /* Process control field. */
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PDPROTOCOL1, /* Process protocol field 1. */
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PDPROTOCOL2, /* Process protocol field 2. */
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PDDATA /* Process data byte. */
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};
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/* PPPoS serial output callback function prototype */
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typedef u32_t (*pppos_output_cb_fn)(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx);
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/*
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* Extended asyncmap - allows any character to be escaped.
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*/
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typedef u8_t ext_accm[32];
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/*
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* PPPoS interface control block.
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*/
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typedef struct pppos_pcb_s pppos_pcb;
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struct pppos_pcb_s {
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/* -- below are data that will NOT be cleared between two sessions */
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ppp_pcb *ppp; /* PPP PCB */
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pppos_output_cb_fn output_cb; /* PPP serial output callback */
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/* -- below are data that will be cleared between two sessions
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*
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* last_xmit must be the first member of cleared members, because it is
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* used to know which part must not be cleared.
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*/
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u32_t last_xmit; /* Time of last transmission. */
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ext_accm out_accm; /* Async-Ctl-Char-Map for output. */
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/* flags */
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unsigned int open :1; /* Set if PPPoS is open */
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unsigned int pcomp :1; /* Does peer accept protocol compression? */
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unsigned int accomp :1; /* Does peer accept addr/ctl compression? */
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/* PPPoS rx */
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ext_accm in_accm; /* Async-Ctl-Char-Map for input. */
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struct pbuf *in_head, *in_tail; /* The input packet. */
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u16_t in_protocol; /* The input protocol code. */
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u16_t in_fcs; /* Input Frame Check Sequence value. */
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u8_t in_state; /* The input process state. */
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u8_t in_escaped; /* Escape next character. */
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};
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/* Create a new PPPoS session. */
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ppp_pcb *pppos_create(struct netif *pppif, pppos_output_cb_fn output_cb,
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ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
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#if !NO_SYS && !PPP_INPROC_IRQ_SAFE
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/* Pass received raw characters to PPPoS to be decoded through lwIP TCPIP thread. */
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err_t pppos_input_tcpip(ppp_pcb *ppp, u8_t *s, int l);
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#endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */
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/* PPP over Serial: this is the input function to be called for received data. */
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void pppos_input(ppp_pcb *ppp, u8_t* data, int len);
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/*
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* Functions called from lwIP
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* DO NOT CALL FROM lwIP USER APPLICATION.
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*/
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#if !NO_SYS && !PPP_INPROC_IRQ_SAFE
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err_t pppos_input_sys(struct pbuf *p, struct netif *inp);
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#endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */
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#endif /* PPPOS_H */
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#endif /* PPP_SUPPORT && PPPOL2TP_SUPPORT */
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