PPP.rar_ppp_ppp协议

1. //#include<tcp.c> 2. #include<ppp.h> 3. #include <string.h> 4. #include <absacc.h> 5. 6. ///////////////////////////////////////////////////////////// 7. // 8. //Function: PPP_FCS_16(fcs,cp,len) 9. // 10. //Description: TO calculate FCS check 11. // 12. //Arguments: RFC1662;sending 13. // 14. //Returns: FCS,result of checking 15. // 16. ///////////////////////////////////////////////////////////// 17. uint PPP_FCS_16(fcs,source,len) 18. uint xdata fcs; 19. uchar xdata *source; 20. uint xdata len; 21. { 22. while (len!=0) 23. { 24. len--; 25. fcs = (fcs>>8)^fcstab[(fcs^*source++)&0xff]; 26. } 27. return(fcs); 28. 29. } 30. /////////////////////////////////////////////////////////////// 31. // 32. //Function: TRY_FCS_16(cp,len) 33. // 34. //Description: TO calculate crc check, 35. // 36. //Arguments: RFC1662;sending 37. // 38. //Returns: CRC,result of checking 39. // 40. /////////////////////////////////////////////////////////////// 41. 42. uint TRY_FCS_16(source,len) 43. uchar xdata *source; 44. uint xdata len; 45. 46. { 47. uint data trialfcs; 48. trialfcs = PPP_FCS_16(HDLC_FCS_START,source,len); 49. trialfcs ^= 0xffff; // complement 50. source[len] = (trialfcs&0x00ff); // least significant byte first 51. source[len+1] = ((trialfcs>>8)&0x00ff); 52. source[len+2] = 0x7E; 53. return (trialfcs); 54. } 55. //////////////////////////////////////////////////////////////// 56. // 57. //Function: RETRY_FCS_16(cp,len) 58. // 59. //Description: TO check the frame whether according with FCS ro not 60. // 61. //Arguments: RFC1662;sending 62. // 63. //Returns: TRUE OF FALSE 64. // 65. /////////////////////////////////////////////////////////////// 66. 67. uchar RETRY_FCS_16(source,len) 68. uchar xdata *source; 69. uint xdata len; 70. 71. { 72. uint data trialfcs; 73. trialfcs = PPP_FCS_16( HDLC_FCS_START , source , len ); 74. if( trialfcs == HDLC_FCS_FINAL ) return ( 1 ); 75. else return(0); 76. } 77. 78. 79. //#define _ppp_encode 80. #ifdef _ppp_encode 81. 82. 83. //////////////////////////////////////////////////////////////// 84. // 85. //Function: ENCODE_LCP_PPP(CP1,CP2) 86. //Description: TO calculate crc check,every frame of networking 87. // must calculate by this Function,and added FLAG_PPP, 88. // ADDRESS,PROTOCOL,AND CRC return value 89. //Arguments: LCP/PPP;sending 90. // 91. //Returns: fcs,result of checking 92. // 93. //"PPP协议编码打包 94. //////////////////////////////////////////////////////////////// 95. 96. void Encode_LCP_PPP(source,dest) //"HDLC-LIKE FRAMING 97. uchar xdata *dest; 98. uchar xdata *source; 99. { 100. uint data len = source[2] * 256 + source[3]; 101. *dest = 0X7E; 102. *(dest+1) = 0XFF; 103. *(dest+2) = 0x03; 104. *(dest+3) = 0xc0; 105. *(dest+4) = 0x21; 106. memcpy((dest+5),source,len); 107. len+=4; 108. TRY_FCS_16(dest+1,len); 109. } 110. 111. //////////////////////////////////////////////////////////////// 112. // 113. //Function: ENCODE_PAP_PPP(CP1,CP2) 114. //Description: TO calculate crc check,every frame of networking 115. // must calculate by this Function,and added FLAG_PPP, 116. // ADDRESS,PROTOCOL,AND CRC return value 117. //Arguments: PAP/PPP;sending 118. // 119. //Returns: fcs,result of checking 120. // 121. //"PPP协议编码打包 122. //7E C0 23 02 02 00 0D 08 57 65 6C 63 6F 6D 65 21 A0 3B 7E 123. //////////////////////////////////////////////////////////////// 124. 125. void Encode_PAP_PPP(source,dest) //"HDLC-LIKE FRAMING 126. uchar xdata *dest; 127. uchar xdata *source; 128. { 129. uint data len = source[2] * 256 + source[3]; 130. *dest = 0X7E; 131. *(dest+1) = 0XC0; 132. *(dest+2) = 0x23; 133. memcpy((dest+3),source,len); 134. len += 2; 135. TRY_FCS_16(dest+1,len); 136. } 137. 138. 139. 140. //////////////////////////////////////////////////////////////// 141. // 142. //Function: ENCODE_IPCP_PPP(CP1,CP2) 143. //Description: TO calculate crc check,every frame of networking 144. // must calculate by this Function,and added FLAG_PPP, 145. // ADDRESS,PROTOCOL,AND CRC return value 146. //Arguments: IPCP/PPP;sending 147. // 148. //Returns: fcs,result of checking 149. // 150. //"PPP协议编码打包 151. //7E 80 21 01 01 00 0A 03 06 0A 1F 00 01 18 C4 7E 152. //////////////////////////////////////////////////////////////// 153. 154. void Encode_IPCP_PPP(source,dest) //"HDLC-LIKE FRAMING 155. uchar xdata *source; 156. uchar xdata *dest; 157. { 158. uint data len = source[2] * 256 + source[3]; 159. *dest = 0X7E; 160. *(dest+1) = 0X80; 161. *(dest+2) = 0x21; 162. memcpy( (dest+3) , source , len ); 163. len += 2; 164. TRY_FCS_16( dest+1 , len ); 165. } 166. 167. 168. 169. //////////////////////////////////////////////////////////////// 170. // 171. //Function: ENCODE_IP_PPP(CP1,CP2) 172. //Description: TO calculate crc check,every frame of networking 173. // must calculate by this Function,and added FLAG_PPP, 174. // ADDRESS,PROTOCOL,AND CRC return value 175. //Arguments: IP/PPP;sending 176. // 177. //Returns: fcs,result of checking 178. // 179. //"PPP协议编码打包 180. //////////////////////////////////////////////////////////////// 181. 182. //7E 21 183. //45 00 00 60 0E 0C 00 00 80 7D 31 05 A4 0A 1F 7D 31 C0 0A 184. //FF FF FF 00 89 00 89 00 4C E7 7F 01 7C 28 10 00 01 00 00 00 00 185. //00 01 20 46 48 45 4D 45 4B 46 44 44 41 44 43 43 41 43 41 43 41 186. //43 41 43 41 43 41 43 41 43 41 43 41 43 41 00 00 20 00 01 C0 0C 187. //00 20 00 01 00 04 7D B3 E0 00 06 00 00 0A 1F 7D 31 C0 188. //B1 67 7E 189. 190. 191. void Encode_IP_PPP(source,dest) //"HDLC-LIKE FRAMING 192. uchar xdata *source;//NETWORK FRAME 193. uchar xdata *dest;//IP DATA FRAME 194. { 195. uint data len = source[2] * 256 + source[3]; 196. *dest = 0X7E; 197. *(dest+1) = 0x21; 198. memcpy( (dest+2) , source , len ); 199. len += 1; 200. TRY_FCS_16( dest+1 , len ); 201. } 202. 203. 204. #endif //_ppp_encode 205. 206. /////////////////////////////////////////////////////////////// 207. //////////////////////////////////////////////////////////////// 208. // 209. //Function: ENCODE_PPP(CP1,CP2) 210. //Description: TO calculate crc check,every frame of networking 211. // must calculate by this Function,and added FLAG_PPP, 212. // ADDRESS,PROTOCOL,AND CRC return value 213. //Arguments: IP/PPP,LCP/PPP,PAP/PPP,IPCP/PPP;send