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4
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1 /*--------------------------------------------------------------------------
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2 NETREK II -- Paradise
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3
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4 Permission to use, copy, modify, and distribute this software and its
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5 documentation, or any derivative works thereof, for any NON-COMMERCIAL
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6 purpose and without fee is hereby granted, provided that this copyright
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7 notice appear in all copies. No representations are made about the
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8 suitability of this software for any purpose. This software is provided
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9 "as is" without express or implied warranty.
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10
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11 Xtrek Copyright 1986 Chris Guthrie
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12 Netrek (Xtrek II) Copyright 1989 Kevin P. Smith
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13 Scott Silvey
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14 Paradise II (Netrek II) Copyright 1993 Larry Denys
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15 Kurt Olsen
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16 Brandon Gillespie
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17 --------------------------------------------------------------------------*/
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18
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19 #include "config.h"
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20 #include <stddef.h>
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21 #include <stdio.h>
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22
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23 #include "defs.h"
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24 #include "packets.h"
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25 #include "gppackets.h"
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26 #include "wtext.h"
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27
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28 size_t client_packet_sizes[] = {
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29 0,
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30 sizeof(struct mesg_cpacket),
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31 sizeof(struct speed_cpacket),
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32 sizeof(struct dir_cpacket),
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33 sizeof(struct phaser_cpacket),
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34 sizeof(struct plasma_cpacket),
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35 sizeof(struct torp_cpacket),
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36 sizeof(struct quit_cpacket),
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37 sizeof(struct login_cpacket),
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38 sizeof(struct outfit_cpacket),
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39 /* 10 v */
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40 sizeof(struct war_cpacket),
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41 sizeof(struct practr_cpacket),
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42 sizeof(struct shield_cpacket),
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43 sizeof(struct repair_cpacket),
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44 sizeof(struct orbit_cpacket),
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45 sizeof(struct planlock_cpacket),
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46 sizeof(struct playlock_cpacket),
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47 sizeof(struct bomb_cpacket),
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48 sizeof(struct beam_cpacket),
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49 sizeof(struct cloak_cpacket),
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50 /* 20 v */
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51 sizeof(struct det_torps_cpacket),
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52 sizeof(struct det_mytorp_cpacket),
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53 sizeof(struct copilot_cpacket),
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54 sizeof(struct refit_cpacket),
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55 sizeof(struct tractor_cpacket),
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56 sizeof(struct repress_cpacket),
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57 sizeof(struct coup_cpacket),
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58 sizeof(struct socket_cpacket),
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59 sizeof(struct options_cpacket),
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60 sizeof(struct bye_cpacket),
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61 /* 30 v */
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62 sizeof(struct dockperm_cpacket),
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63 sizeof(struct updates_cpacket),
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64 sizeof(struct resetstats_cpacket),
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65 sizeof(struct reserved_cpacket),
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66 sizeof(struct scan_cpacket),
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67 sizeof(struct udp_req_cpacket),
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68 sizeof(struct sequence_cpacket),
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69 sizeof(struct rsa_key_cpacket),
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70 sizeof(struct obvious_packet),
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71 0,
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72 /* 40 v */
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73 0,
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74 0,
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75 sizeof(struct ping_cpacket),
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76 #ifdef SHORT_PACKETS
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77 sizeof(struct shortreq_cpacket),
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78 sizeof(struct threshold_cpacket),
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79 0, /* CP_S_MESSAGE */
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80 0, /* CP_S_RESERVED */
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81 0, /* CP_S_DUMMY */
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82 #else
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83 0,
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84 0,
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85 0,
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86 0,
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87 0,
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88 #endif
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89 0,
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90 0,
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91 /* 50 v */
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92 0,
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93 0,
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94 0,
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95 0,
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96 0,
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97 0,
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98 0,
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99 0,
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100 0,
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101 0,
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102 /* 60 v */
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103 #ifdef FEATURE
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104 sizeof(struct feature_cpacket)/* CP_FEATURE */
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105 #else
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106 0
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107 #endif
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108 };
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109
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110 #define num_cpacket_sizes sizeof(client_packet_sizes)/sizeof(*client_packet_sizes)
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111
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112 int
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113 size_of_cpacket(pkt)
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114 void *pkt;
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115 {
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116 CARD8 type;
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117 CARD8 subtype;
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118
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119 type = ((CARD8 *) pkt)[0];
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120 subtype = ((CARD8 *) pkt)[1];
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121
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122 if (type < num_cpacket_sizes && client_packet_sizes[type] > 0)
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123 return client_packet_sizes[type];
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124
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125 switch (type)
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126 {
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127 #ifdef CP_FIRE_WEAPON
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128 case CP_FIRE_WEAPON:
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129 {
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130 struct fire_weapon_cpacket *fwp = pkt;
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131 return (fwp->mech == TM_POSITION) ? 12 : 4;
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132 }
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133 #endif
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134
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135 #ifdef SHORT_PACKETS
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136 case CP_S_MESSAGE:
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137 return ((unsigned char *) pkt)[3];
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138 case CP_S_RESERVED:
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139 case CP_S_DUMMY:
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140 /* hmm? good question */
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141 return 0;
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142 #endif /* SHORT_PACKETS */
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143
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144 default:
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145 return 0;
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146 }
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147 }
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148
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149
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150 int server_packet_sizes[] = {
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151 0, /* record 0 */
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152 sizeof(struct mesg_spacket), /* SP_MESSAGE */
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153 sizeof(struct plyr_info_spacket), /* SP_PLAYER_INFO */
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154 sizeof(struct kills_spacket), /* SP_KILLS */
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155 sizeof(struct player_spacket),/* SP_PLAYER */
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156 sizeof(struct torp_info_spacket), /* SP_TORP_INFO */
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157 sizeof(struct torp_spacket), /* SP_TORP */
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158 sizeof(struct phaser_spacket),/* SP_PHASER */
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159 sizeof(struct plasma_info_spacket), /* SP_PLASMA_INFO */
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160 sizeof(struct plasma_spacket),/* SP_PLASMA */
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161 /* 10 v */
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162 sizeof(struct warning_spacket), /* SP_WARNING */
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163 sizeof(struct motd_spacket), /* SP_MOTD */
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164 sizeof(struct you_spacket), /* SP_YOU */
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165 sizeof(struct queue_spacket), /* SP_QUEUE */
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166 sizeof(struct status_spacket),/* SP_STATUS */
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167 sizeof(struct planet_spacket),/* SP_PLANET */
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168 sizeof(struct pickok_spacket),/* SP_PICKOK */
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169 sizeof(struct login_spacket), /* SP_LOGIN */
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170 sizeof(struct flags_spacket), /* SP_FLAGS */
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171 sizeof(struct mask_spacket), /* SP_MASK */
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172 /* 20 v */
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173 sizeof(struct pstatus_spacket), /* SP_PSTATUS */
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174 sizeof(struct badversion_spacket), /* SP_BADVERSION */
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175 sizeof(struct hostile_spacket), /* SP_HOSTILE */
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176 sizeof(struct stats_spacket), /* SP_STATS */
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177 sizeof(struct plyr_login_spacket), /* SP_PL_LOGIN */
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178 sizeof(struct reserved_spacket), /* SP_RESERVED */
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179 sizeof(struct planet_loc_spacket), /* SP_PLANET_LOC */
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180 sizeof(struct scan_spacket), /* SP_SCAN (ATM) */
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181 sizeof(struct udp_reply_spacket), /* SP_UDP_REPLY */
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182 sizeof(struct sequence_spacket), /* SP_SEQUENCE */
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183 /* 30 v */
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184 sizeof(struct sc_sequence_spacket), /* SP_SC_SEQUENCE */
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185 sizeof(struct rsa_key_spacket), /* SP_RSA_KEY */
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186 sizeof(struct motd_pic_spacket), /* SP_MOTD_PIC */
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187 sizeof(struct stats_spacket2),/* SP_STATS2 */
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188 sizeof(struct status_spacket2), /* SP_STATUS2 */
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189 sizeof(struct planet_spacket2), /* SP_PLANET2 */
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190 sizeof(struct obvious_packet),/* SP_NEW_MOTD */
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191 sizeof(struct thingy_spacket),/* SP_THINGY */
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192 sizeof(struct thingy_info_spacket), /* SP_THINGY_INFO */
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193 sizeof(struct ship_cap_spacket), /* SP_SHIP_CAP */
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194 /* 40 v */
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195 #ifdef SHORT_PACKETS
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196 sizeof(struct shortreply_spacket), /* SP_S_REPLY */
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197 -1, /* SP_S_MESSAGE */
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198 -1, /* SP_S_WARNING */
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199 sizeof(struct youshort_spacket), /* SP_S_YOU */
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200 sizeof(struct youss_spacket), /* SP_S_YOU_SS */
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201 -1, /* SP_S_PLAYER */
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202 #else
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203 -1,
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204 -1,
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205 -1,
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206 -1,
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207 -1,
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208 -1,
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209 #endif
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210 sizeof(struct ping_spacket), /* SP_PING */
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211 -1, /* SP_S_TORP */
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212 -1, /* SP_S_TORP_INFO */
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213 20, /* SP_S_8_TORP */
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214 /* 50 v */
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215 -1, /* SP_S_PLANET */
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216 -1, /* SP_GPARAM */
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217 -1, /* SP_PARADISE_EXT1 */
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218 sizeof(struct terrain_packet2), /* SP_TERRAIN2 */
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219 sizeof(struct terrain_info_packet2), /* SP_TERRAIN_INFO2 */
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220 -1,
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221 -1,
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222 -1,
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223 -1,
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224 -1,
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225 /* 60 v */
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226 #ifdef FEATURE
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227 sizeof(struct feature_spacket), /* SP_FEATURE */
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228 #else
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229 -1,
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230 #endif
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231 -1 /* The fools! I'm pretty sure there is an */
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232 /* off-by-one in the test in the last fnc */
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233 /* but I'm not sure and this WILL fix it. */
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234 };
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235
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236 #define num_spacket_sizes (sizeof(server_packet_sizes) / sizeof(server_packet_sizes[0]) - 1)
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237
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238 #ifdef SHORT_PACKETS
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239 unsigned char numofbits[256] =
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240 {0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1,
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241 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1,
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242 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2,
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243 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 1,
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244 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2,
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245 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2,
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246 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3,
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247 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 1,
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248 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2,
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249 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2,
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250 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3,
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251 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2,
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252 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3,
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253 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 3,
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254 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4,
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255 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8};
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256
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257 static int vtsize[9] =
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258 {4, 8, 8, 12, 12, 16, 20, 20, 24}; /* How big is the torppacket */
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259 int vtisize[9] =
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260 {4, 7, 9, 11, 13, 16, 18, 20, 22}; /* 4 byte Header + torpdata */
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261
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262
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263 static int
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264 padto4(sz)
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265 int sz;
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266 {
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267 return (sz % 4) ? (sz / 4 + 1) * 4 : sz;
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268
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269 }
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270 #endif
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271
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272 int
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273 size_of_spacket(pkt)
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274 unsigned char *pkt;
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275 {
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276 switch (pkt[0])
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277 {
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278 case SP_GPARAM:
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279 switch (pkt[1])
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280 {
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281 case 0:
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282 return sizeof(struct gp_sizes_spacket);
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283 case 1:
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284 return sizeof(struct gp_team_spacket);
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285 case 2:
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286 return sizeof(struct gp_teamlogo_spacket);
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287 case 3:
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288 return sizeof(struct gp_shipshape_spacket);
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289 case 4:
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290 return sizeof(struct gp_shipbitmap_spacket);
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291 case 5:
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292 return sizeof(struct gp_rank_spacket);
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293 case 6:
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294 return sizeof(struct gp_royal_spacket);
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295 case 7:
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296 return sizeof(struct gp_teamplanet_spacket);
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297 default:
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298 return 0;
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299 }
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300 #ifdef SHORT_PACKETS
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301 case SP_S_MESSAGE:
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302 return padto4(pkt[4]); /* IMPORTANT Changed */
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303 case SP_S_WARNING:
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304 if (pkt[1] == STEXTE_STRING ||
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305 pkt[1] == SHORT_WARNING)
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306 {
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307 return padto4(pkt[3]);
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308 }
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309 else
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310 return 4; /* Normal Packet */
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311 case SP_S_PLAYER:
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312 if (pkt[1] & 128)
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313 { /* Small +extended Header */
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314 return padto4(((pkt[1] & 0x3f) * 4) + 4);
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315 }
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316 else if (pkt[1] & 64)
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317 { /* Small Header */
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318 return padto4(((pkt[1] & 0x3f) * 4) + 4);
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319 }
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320 else
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321 { /* Big Header */
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322 return padto4((pkt[1] * 4 + 12));
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323 }
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324 case SP_S_TORP:
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325 return padto4(vtsize[numofbits[pkt[1]]]);
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326 case SP_S_TORP_INFO:
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327 return padto4((vtisize[numofbits[pkt[1]]] + numofbits[pkt[3]]));
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328 case SP_S_PLANET:
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329 return padto4((pkt[1] * VPLANET_SIZE) + 2);
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330 #endif
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331 case SP_PARADISE_EXT1:
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332 switch (pkt[1])
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333 {
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334 case SP_PE1_MISSING_BITMAP:
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335 return sizeof(struct pe1_missing_bitmap_spacket);
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336 case SP_PE1_NUM_MISSILES:
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337 return sizeof(struct pe1_num_missiles_spacket);
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338 default:
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339 return 0;
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340 }
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341 default:
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342 #ifdef FEATURE_DIAG
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343 if (*pkt >= num_spacket_sizes)
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344 {
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345 fprintf(stderr, "Packet type %d out of range (%d)\n", (*pkt), num_spacket_sizes);
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346 return (0);
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347 }
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348 if (server_packet_sizes[*pkt] < 0)
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349 {
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350 fprintf(stderr, "Packet type %d has no size\n", (*pkt));
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351 return (0);
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352 }
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353 return (server_packet_sizes[*pkt]);
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354 #else
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355 return (*pkt < num_spacket_sizes && server_packet_sizes[*pkt] >= 0)
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356 ? server_packet_sizes[*pkt] : 0;
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357 #endif
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358 }
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359 }
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