1 /*****************************************************************************
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2 * ppp.h - Network Point to Point Protocol header file.
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4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
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5 * portions Copyright (c) 1997 Global Election Systems Inc.
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7 * The authors hereby grant permission to use, copy, modify, distribute,
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8 * and license this software and its documentation for any purpose, provided
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9 * that existing copyright notices are retained in all copies and that this
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10 * notice and the following disclaimer are included verbatim in any
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11 * distributions. No written agreement, license, or royalty fee is required
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12 * for any of the authorized uses.
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14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
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15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 ******************************************************************************
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28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
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30 * 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
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31 * Original derived from BSD codes.
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32 *****************************************************************************/
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37 #include "lwip/opt.h"
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39 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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41 #include "lwip/def.h"
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42 #include "lwip/sio.h"
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43 #include "lwip/api.h"
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44 #include "lwip/sockets.h"
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45 #include "lwip/stats.h"
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46 #include "lwip/mem.h"
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47 #include "lwip/tcpip.h"
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48 #include "lwip/netif.h"
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51 * pppd.h - PPP daemon global declarations.
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53 * Copyright (c) 1989 Carnegie Mellon University.
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54 * All rights reserved.
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56 * Redistribution and use in source and binary forms are permitted
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57 * provided that the above copyright notice and this paragraph are
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58 * duplicated in all such forms and that any documentation,
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59 * advertising materials, and other materials related to such
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60 * distribution and use acknowledge that the software was developed
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61 * by Carnegie Mellon University. The name of the
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62 * University may not be used to endorse or promote products derived
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63 * from this software without specific prior written permission.
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64 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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65 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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66 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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70 * ppp_defs.h - PPP definitions.
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72 * Copyright (c) 1994 The Australian National University.
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73 * All rights reserved.
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75 * Permission to use, copy, modify, and distribute this software and its
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76 * documentation is hereby granted, provided that the above copyright
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77 * notice appears in all copies. This software is provided without any
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78 * warranty, express or implied. The Australian National University
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79 * makes no representations about the suitability of this software for
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82 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
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83 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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84 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
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85 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
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88 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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89 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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90 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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91 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
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92 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
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96 #define TIMEOUT(f, a, t) sys_untimeout((f), (a)), sys_timeout((t)*1000, (f), (a))
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97 #define UNTIMEOUT(f, a) sys_untimeout((f), (a))
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100 #ifndef __u_char_defined
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102 /* Type definitions for BSD code. */
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103 typedef unsigned long u_long;
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104 typedef unsigned int u_int;
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105 typedef unsigned short u_short;
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106 typedef unsigned char u_char;
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111 * Constants and structures defined by the internet system,
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112 * Per RFC 790, September 1981, and numerous additions.
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116 * The basic PPP frame.
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118 #define PPP_HDRLEN 4 /* octets for standard ppp header */
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119 #define PPP_FCSLEN 2 /* octets for FCS */
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123 * Significant octet values.
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125 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
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126 #define PPP_UI 0x03 /* Unnumbered Information */
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127 #define PPP_FLAG 0x7e /* Flag Sequence */
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128 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
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129 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
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132 * Protocol field values.
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134 #define PPP_IP 0x21 /* Internet Protocol */
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135 #define PPP_AT 0x29 /* AppleTalk Protocol */
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136 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
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137 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
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138 #define PPP_COMP 0xfd /* compressed packet */
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139 #define PPP_IPCP 0x8021 /* IP Control Protocol */
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140 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
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141 #define PPP_CCP 0x80fd /* Compression Control Protocol */
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142 #define PPP_LCP 0xc021 /* Link Control Protocol */
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143 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
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144 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
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145 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
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146 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
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149 * Values for FCS calculations.
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151 #define PPP_INITFCS 0xffff /* Initial FCS value */
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152 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
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153 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
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156 * Extended asyncmap - allows any character to be escaped.
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158 typedef u_char ext_accm[32];
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161 * What to do with network protocol (NP) packets.
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164 NPMODE_PASS, /* pass the packet through */
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165 NPMODE_DROP, /* silently drop the packet */
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166 NPMODE_ERROR, /* return an error */
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167 NPMODE_QUEUE /* save it up for later. */
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171 * Inline versions of get/put char/short/long.
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172 * Pointer is advanced; we assume that both arguments
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173 * are lvalues and will already be in registers.
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174 * cp MUST be u_char *.
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176 #define GETCHAR(c, cp) { \
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179 #define PUTCHAR(c, cp) { \
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180 *(cp)++ = (u_char) (c); \
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184 #define GETSHORT(s, cp) { \
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185 (s) = *(cp); (cp)++; (s) <<= 8; \
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186 (s) |= *(cp); (cp)++; \
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188 #define PUTSHORT(s, cp) { \
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189 *(cp)++ = (u_char) ((s) >> 8); \
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190 *(cp)++ = (u_char) (s & 0xff); \
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193 #define GETLONG(l, cp) { \
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194 (l) = *(cp); (cp)++; (l) <<= 8; \
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195 (l) |= *(cp); (cp)++; (l) <<= 8; \
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196 (l) |= *(cp); (cp)++; (l) <<= 8; \
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197 (l) |= *(cp); (cp)++; \
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199 #define PUTLONG(l, cp) { \
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200 *(cp)++ = (u_char) ((l) >> 24); \
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201 *(cp)++ = (u_char) ((l) >> 16); \
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202 *(cp)++ = (u_char) ((l) >> 8); \
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203 *(cp)++ = (u_char) (l); \
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207 #define INCPTR(n, cp) ((cp) += (n))
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208 #define DECPTR(n, cp) ((cp) -= (n))
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210 #define BCMP(s0, s1, l) memcmp((u_char *)(s0), (u_char *)(s1), (l))
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211 #define BCOPY(s, d, l) MEMCPY((d), (s), (l))
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212 #define BZERO(s, n) memset(s, 0, n)
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215 #define PRINTMSG(m, l) { m[l] = '\0'; ppp_trace(LOG_INFO, "Remote message: %s\n", m); }
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216 #else /* PPP_DEBUG */
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217 #define PRINTMSG(m, l)
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218 #endif /* PPP_DEBUG */
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221 * MAKEHEADER - Add PPP Header fields to a packet.
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223 #define MAKEHEADER(p, t) { \
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224 PUTCHAR(PPP_ALLSTATIONS, p); \
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225 PUTCHAR(PPP_UI, p); \
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228 /*************************
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229 *** PUBLIC DEFINITIONS ***
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230 *************************/
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233 #define PPPERR_NONE 0 /* No error. */
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234 #define PPPERR_PARAM -1 /* Invalid parameter. */
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235 #define PPPERR_OPEN -2 /* Unable to open PPP session. */
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236 #define PPPERR_DEVICE -3 /* Invalid I/O device for PPP. */
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237 #define PPPERR_ALLOC -4 /* Unable to allocate resources. */
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238 #define PPPERR_USER -5 /* User interrupt. */
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239 #define PPPERR_CONNECT -6 /* Connection lost. */
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240 #define PPPERR_AUTHFAIL -7 /* Failed authentication challenge. */
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241 #define PPPERR_PROTOCOL -8 /* Failed to meet protocol. */
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244 * PPP IOCTL commands.
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247 * Get the up status - 0 for down, non-zero for up. The argument must
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250 #define PPPCTLG_UPSTATUS 100 /* Get the up status - 0 down else up */
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251 #define PPPCTLS_ERRCODE 101 /* Set the error code */
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252 #define PPPCTLG_ERRCODE 102 /* Get the error code */
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253 #define PPPCTLG_FD 103 /* Get the fd associated with the ppp */
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255 /************************
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256 *** PUBLIC DATA TYPES ***
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257 ************************/
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260 * The following struct gives the addresses of procedures to call
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261 * for a particular protocol.
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264 u_short protocol; /* PPP protocol number */
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265 /* Initialization procedure */
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266 void (*init) (int unit);
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267 /* Process a received packet */
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268 void (*input) (int unit, u_char *pkt, int len);
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269 /* Process a received protocol-reject */
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270 void (*protrej) (int unit);
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271 /* Lower layer has come up */
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272 void (*lowerup) (int unit);
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273 /* Lower layer has gone down */
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274 void (*lowerdown) (int unit);
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275 /* Open the protocol */
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276 void (*open) (int unit);
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277 /* Close the protocol */
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278 void (*close) (int unit, char *reason);
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280 /* Print a packet in readable form */
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281 int (*printpkt) (u_char *pkt, int len,
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282 void (*printer) (void *, char *, ...),
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284 /* Process a received data packet */
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285 void (*datainput) (int unit, u_char *pkt, int len);
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287 int enabled_flag; /* 0 iff protocol is disabled */
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288 char *name; /* Text name of protocol */
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290 /* Check requested options, assign defaults */
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291 void (*check_options) (u_long);
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292 /* Configure interface for demand-dial */
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293 int (*demand_conf) (int unit);
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294 /* Say whether to bring up link for this pkt */
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295 int (*active_pkt) (u_char *pkt, int len);
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300 * The following structure records the time in seconds since
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301 * the last NP packet was sent or received.
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304 u_short xmit_idle; /* seconds since last NP packet sent */
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305 u_short recv_idle; /* seconds since last NP packet received */
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308 struct ppp_settings {
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310 u_int disable_defaultip : 1; /* Don't use hostname for default IP addrs */
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311 u_int auth_required : 1; /* Peer is required to authenticate */
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312 u_int explicit_remote : 1; /* remote_name specified with remotename opt */
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313 u_int refuse_pap : 1; /* Don't wanna auth. ourselves with PAP */
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314 u_int refuse_chap : 1; /* Don't wanna auth. ourselves with CHAP */
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315 u_int usehostname : 1; /* Use hostname for our_name */
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316 u_int usepeerdns : 1; /* Ask peer for DNS adds */
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318 u_short idle_time_limit; /* Shut down link if idle for this long */
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319 int maxconnect; /* Maximum connect time (seconds) */
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321 char user [MAXNAMELEN + 1]; /* Username for PAP */
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322 char passwd [MAXSECRETLEN + 1]; /* Password for PAP, secret for CHAP */
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323 char our_name [MAXNAMELEN + 1]; /* Our name for authentication purposes */
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324 char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */
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328 struct ip_addr our_ipaddr, his_ipaddr, netmask, dns1, dns2;
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331 /*****************************
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332 *** PUBLIC DATA STRUCTURES ***
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333 *****************************/
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335 /* Buffers for outgoing packets. */
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336 extern u_char *outpacket_buf[NUM_PPP];
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338 extern struct ppp_settings ppp_settings;
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340 extern struct protent *ppp_protocols[]; /* Table of pointers to supported protocols */
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343 /***********************
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344 *** PUBLIC FUNCTIONS ***
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345 ***********************/
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347 /* Initialize the PPP subsystem. */
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348 err_t pppInit(void);
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350 /* Warning: Using PPPAUTHTYPE_ANY might have security consequences.
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353 * In practice, within or associated with each PPP server, there is a
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354 * database which associates "user" names with authentication
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355 * information ("secrets"). It is not anticipated that a particular
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356 * named user would be authenticated by multiple methods. This would
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357 * make the user vulnerable to attacks which negotiate the least secure
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358 * method from among a set (such as PAP rather than CHAP). If the same
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359 * secret was used, PAP would reveal the secret to be used later with
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362 * Instead, for each user name there should be an indication of exactly
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363 * one method used to authenticate that user name. If a user needs to
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364 * make use of different authentication methods under different
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365 * circumstances, then distinct user names SHOULD be employed, each of
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366 * which identifies exactly one authentication method.
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376 void pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd);
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379 * Open a new PPP connection using the given serial I/O device.
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380 * This initializes the PPP control block but does not
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381 * attempt to negotiate the LCP session.
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382 * Return a new PPP connection descriptor on success or
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383 * an error code (negative) on failure.
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385 int pppOverSerialOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx);
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388 * Open a new PPP Over Ethernet (PPPOE) connection.
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390 int pppOverEthernetOpen(struct netif *ethif, const char *service_name, const char *concentrator_name, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx);
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392 /* for source code compatibility */
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393 #define pppOpen(fd,cb,ls) pppOverSerialOpen(fd,cb,ls)
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396 * Close a PPP connection and release the descriptor.
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397 * Any outstanding packets in the queues are dropped.
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398 * Return 0 on success, an error code on failure.
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400 int pppClose(int pd);
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403 * Indicate to the PPP process that the line has disconnected.
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405 void pppSigHUP(int pd);
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408 * Get and set parameters for the given connection.
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409 * Return 0 on success, an error code on failure.
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411 int pppIOCtl(int pd, int cmd, void *arg);
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414 * Return the Maximum Transmission Unit for the given PPP connection.
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416 u_int pppMTU(int pd);
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419 * Write n characters to a ppp link.
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420 * RETURN: >= 0 Number of characters written, -1 Failed to write to device.
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422 int pppWrite(int pd, const u_char *s, int n);
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424 void pppInProcOverEthernet(int pd, struct pbuf *pb);
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426 struct pbuf *pppSingleBuf(struct pbuf *p);
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428 void pppLinkTerminated(int pd);
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430 void pppLinkDown(int pd);
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432 void pppMainWakeup(int pd);
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434 /* Configure i/f transmit parameters */
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435 void ppp_send_config (int, int, u32_t, int, int);
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436 /* Set extended transmit ACCM */
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437 void ppp_set_xaccm (int, ext_accm *);
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438 /* Configure i/f receive parameters */
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439 void ppp_recv_config (int, int, u32_t, int, int);
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440 /* Find out how long link has been idle */
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441 int get_idle_time (int, struct ppp_idle *);
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443 /* Configure VJ TCP header compression */
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444 int sifvjcomp (int, int, int, int);
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445 /* Configure i/f down (for IP) */
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447 /* Set mode for handling packets for proto */
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448 int sifnpmode (int u, int proto, enum NPmode mode);
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449 /* Configure i/f down (for IP) */
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451 /* Configure IP addresses for i/f */
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452 int sifaddr (int, u32_t, u32_t, u32_t, u32_t, u32_t);
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453 /* Reset i/f IP addresses */
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454 int cifaddr (int, u32_t, u32_t);
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455 /* Create default route through i/f */
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456 int sifdefaultroute (int, u32_t, u32_t);
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457 /* Delete default route through i/f */
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458 int cifdefaultroute (int, u32_t, u32_t);
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460 /* Get appropriate netmask for address */
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461 u32_t GetMask (u32_t);
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463 #endif /* PPP_SUPPORT */
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