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1 | office | 1 | /** |
2 | * @file |
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3 | * Network Point to Point Protocol over Serial header file. |
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4 | * |
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5 | */ |
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6 | |||
7 | /* |
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8 | * Redistribution and use in source and binary forms, with or without modification, |
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9 | * are permitted provided that the following conditions are met: |
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10 | * |
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11 | * 1. Redistributions of source code must retain the above copyright notice, |
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12 | * this list of conditions and the following disclaimer. |
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13 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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14 | * this list of conditions and the following disclaimer in the documentation |
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15 | * and/or other materials provided with the distribution. |
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16 | * 3. The name of the author may not be used to endorse or promote products |
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17 | * derived from this software without specific prior written permission. |
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18 | * |
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19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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20 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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22 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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24 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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27 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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28 | * OF SUCH DAMAGE. |
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29 | * |
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30 | * This file is part of the lwIP TCP/IP stack. |
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31 | * |
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32 | */ |
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33 | |||
34 | #include "netif/ppp/ppp_opts.h" |
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35 | #if PPP_SUPPORT && PPPOS_SUPPORT /* don't build if not configured for use in lwipopts.h */ |
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36 | |||
37 | #ifndef PPPOS_H |
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38 | #define PPPOS_H |
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39 | |||
40 | #include "lwip/sys.h" |
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41 | |||
42 | #include "ppp.h" |
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43 | #include "vj.h" |
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44 | |||
45 | /* PPP packet parser states. Current state indicates operation yet to be |
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46 | * completed. */ |
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47 | enum { |
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48 | PDIDLE = 0, /* Idle state - waiting. */ |
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49 | PDSTART, /* Process start flag. */ |
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50 | PDADDRESS, /* Process address field. */ |
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51 | PDCONTROL, /* Process control field. */ |
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52 | PDPROTOCOL1, /* Process protocol field 1. */ |
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53 | PDPROTOCOL2, /* Process protocol field 2. */ |
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54 | PDDATA /* Process data byte. */ |
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55 | }; |
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56 | |||
57 | /* PPPoS serial output callback function prototype */ |
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58 | typedef u32_t (*pppos_output_cb_fn)(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx); |
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59 | |||
60 | /* |
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61 | * Extended asyncmap - allows any character to be escaped. |
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62 | */ |
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63 | typedef u8_t ext_accm[32]; |
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64 | |||
65 | /* |
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66 | * PPPoS interface control block. |
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67 | */ |
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68 | typedef struct pppos_pcb_s pppos_pcb; |
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69 | struct pppos_pcb_s { |
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70 | /* -- below are data that will NOT be cleared between two sessions */ |
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71 | ppp_pcb *ppp; /* PPP PCB */ |
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72 | pppos_output_cb_fn output_cb; /* PPP serial output callback */ |
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73 | |||
74 | /* -- below are data that will be cleared between two sessions |
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75 | * |
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76 | * last_xmit must be the first member of cleared members, because it is |
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77 | * used to know which part must not be cleared. |
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78 | */ |
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79 | u32_t last_xmit; /* Time of last transmission. */ |
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80 | ext_accm out_accm; /* Async-Ctl-Char-Map for output. */ |
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81 | |||
82 | /* flags */ |
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83 | unsigned int open :1; /* Set if PPPoS is open */ |
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84 | unsigned int pcomp :1; /* Does peer accept protocol compression? */ |
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85 | unsigned int accomp :1; /* Does peer accept addr/ctl compression? */ |
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86 | |||
87 | /* PPPoS rx */ |
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88 | ext_accm in_accm; /* Async-Ctl-Char-Map for input. */ |
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89 | struct pbuf *in_head, *in_tail; /* The input packet. */ |
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90 | u16_t in_protocol; /* The input protocol code. */ |
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91 | u16_t in_fcs; /* Input Frame Check Sequence value. */ |
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92 | u8_t in_state; /* The input process state. */ |
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93 | u8_t in_escaped; /* Escape next character. */ |
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94 | }; |
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95 | |||
96 | /* Create a new PPPoS session. */ |
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97 | ppp_pcb *pppos_create(struct netif *pppif, pppos_output_cb_fn output_cb, |
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98 | ppp_link_status_cb_fn link_status_cb, void *ctx_cb); |
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99 | |||
100 | #if !NO_SYS && !PPP_INPROC_IRQ_SAFE |
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101 | /* Pass received raw characters to PPPoS to be decoded through lwIP TCPIP thread. */ |
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102 | err_t pppos_input_tcpip(ppp_pcb *ppp, u8_t *s, int l); |
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103 | #endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */ |
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104 | |||
105 | /* PPP over Serial: this is the input function to be called for received data. */ |
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106 | void pppos_input(ppp_pcb *ppp, u8_t* data, int len); |
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107 | |||
108 | |||
109 | /* |
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110 | * Functions called from lwIP |
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111 | * DO NOT CALL FROM lwIP USER APPLICATION. |
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112 | */ |
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113 | #if !NO_SYS && !PPP_INPROC_IRQ_SAFE |
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114 | err_t pppos_input_sys(struct pbuf *p, struct netif *inp); |
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115 | #endif /* !NO_SYS && !PPP_INPROC_IRQ_SAFE */ |
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116 | |||
117 | #endif /* PPPOS_H */ |
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118 | #endif /* PPP_SUPPORT && PPPOL2TP_SUPPORT */ |