1 | #include "globals.h"
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2 |
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3 | /******************************** */
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4 | /* LINKED LIST CODE - IF IT'S USEFUL ELSEWHERE, IT SHOULD BE SPLIT OFF INTO linkedlist.h/.c */
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5 | /******************************** */
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6 |
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7 | // Simple, doubly linked
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8 | // This is thread-safe, so requires pthread. Also expect locking if iterators are not destroyed.
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9 |
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10 | #include <pthread.h>
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11 |
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12 | struct llist_node {
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13 | void *obj;
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14 | struct llist_node *prv;
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15 | struct llist_node *nxt;
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16 | };
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17 |
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18 | typedef struct llist {
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19 | struct llist_node *first;
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20 | struct llist_node *last;
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21 | int items;
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22 | pthread_mutex_t lock;
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23 | } LLIST;
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24 |
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25 | typedef struct llist_itr {
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26 | LLIST *l;
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27 | struct llist_node *cur;
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28 | } LLIST_ITR;
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29 |
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30 | LLIST *llist_create(void); // init linked list
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31 | void llist_destroy(LLIST *l); // de-init linked list - frees all objects on the list
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32 |
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33 | void *llist_append(LLIST *l, void *o); // append object onto bottom of list, returns ptr to obj
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34 |
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35 | void *llist_itr_init(LLIST *l, LLIST_ITR *itr); // linked list iterator, returns ptr to first obj
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36 | void llist_itr_release(LLIST_ITR *itr); // release iterator
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37 | void *llist_itr_next(LLIST_ITR *itr); // iterates, returns ptr to next obj
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38 |
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39 | void *llist_itr_insert(LLIST_ITR *itr, void *o); // insert object at itr point, iterates to and returns ptr to new obj
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40 | void *llist_itr_remove(LLIST_ITR *itr); // remove obj at itr, iterates to and returns ptr to next obj
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41 |
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42 | int llist_count(LLIST *l); // returns number of obj in list
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43 |
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44 | /******************************** */
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45 |
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46 | #include <string.h>
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47 | #include <stdlib.h>
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48 |
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49 | LLIST *llist_create(void)
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50 | {
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51 | LLIST *l = malloc(sizeof(LLIST));
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52 | bzero(l, sizeof(LLIST));
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53 |
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54 | pthread_mutex_init(&l->lock, NULL);
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55 |
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56 | l->items = 0;
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57 |
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58 | return l;
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59 | }
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60 |
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61 | void llist_destroy(LLIST *l)
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62 | {
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63 | LLIST_ITR itr;
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64 | void *o = llist_itr_init(l, &itr);
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65 | while (o) {
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66 | free(o);
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67 | o = llist_itr_remove(&itr);
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68 | }
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69 | llist_itr_release(&itr);
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70 | }
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71 |
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72 | void *llist_append(LLIST *l, void *o)
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73 | {
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74 | pthread_mutex_lock(&l->lock);
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75 | if (o) {
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76 | struct llist_node *ln = malloc(sizeof(struct llist_node));
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77 |
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78 | bzero(ln, sizeof(struct llist_node));
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79 | ln->obj = o;
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80 |
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81 | if (l->last) {
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82 | ln->prv = l->last;
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83 | ln->prv->nxt = ln;
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84 | } else {
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85 | l->first = ln;
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86 | }
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87 | l->last = ln;
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88 |
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89 | l->items++;
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90 | }
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91 | pthread_mutex_unlock(&l->lock);
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92 |
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93 | return o;
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94 | }
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95 |
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96 | void *llist_itr_init(LLIST *l, LLIST_ITR *itr)
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97 | {
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98 | pthread_mutex_lock(&l->lock);
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99 | if (l->first) {
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100 |
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101 | bzero(itr, sizeof(LLIST_ITR));
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102 | itr->cur = l->first;
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103 | itr->l = l;
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104 |
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105 | return itr->cur->obj;
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106 | }
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107 |
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108 | return NULL;
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109 | }
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110 |
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111 | void llist_itr_release(LLIST_ITR *itr)
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112 | {
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113 | pthread_mutex_unlock(&itr->l->lock);
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114 | }
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115 |
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116 | void *llist_itr_next(LLIST_ITR *itr)
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117 | {
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118 | if (itr->cur->nxt) {
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119 | itr->cur = itr->cur->nxt;
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120 | return itr->cur->obj;
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121 | }
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122 |
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123 | return NULL;
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124 | }
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125 |
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126 | void *llist_itr_remove(LLIST_ITR *itr) // this needs cleaning - I was lazy
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127 | {
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128 | itr->l->items--;
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129 | if ((itr->cur == itr->l->first) && (itr->cur == itr->l->last)) {
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130 | // cs_log("DEBUG %d: first&last", llist_count(itr->l));
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131 | free(itr->cur);
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132 | itr->l->first = NULL;
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133 | itr->l->last = NULL;
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134 | return NULL;
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135 | } else if (itr->cur == itr->l->first) {
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136 | // cs_log("DEBUG %d: first", llist_count(itr->l));
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137 | struct llist_node *nxt = itr->cur->nxt;
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138 | free(itr->cur);
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139 | nxt->prv = NULL;
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140 | itr->l->first = nxt;
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141 | itr->cur = nxt;
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142 | } else if (itr->cur == itr->l->last) {
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143 | // cs_log("DEBUG %d: last", llist_count(itr->l));
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144 | itr->l->last = itr->cur->prv;
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145 | itr->l->last->nxt = NULL;
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146 | free(itr->cur);
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147 | return NULL;
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148 | } else {
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149 | // cs_log("DEBUG %d: free middle", llist_count(itr->l));
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150 | struct llist_node *nxt = itr->cur->nxt;
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151 | itr->cur->prv->nxt = itr->cur->nxt;
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152 | itr->cur->nxt->prv = itr->cur->prv;
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153 | free(itr->cur);
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154 | itr->cur = nxt;
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155 | }
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156 |
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157 | return itr->cur->obj;
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158 | }
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159 |
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160 | int llist_count(LLIST *l)
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161 | {
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162 | return l->items;
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163 | }
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164 |
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165 | /******************************** */
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166 |
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167 | #define CC_MAXMSGSIZE 512
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168 | #define CC_MAX_PROV 16
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169 |
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170 | #define SWAPC(X, Y) do { char p; p = *X; *X = *Y; *Y = p; } while(0)
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171 | #define B16(X) ( (X)[0] << 8 | (X)[1] )
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172 | #define B24(X) ( (X)[0] << 16 | (X)[1] << 8 | (X)[2] )
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173 | #define B32(X) ( (X)[0] << 24 | (X)[1] << 16 | (X)[2] << 8 | (X)[3] )
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174 | #define B64(X) ( (X)[0] << 56 | (X)[1] << 48 | (X)[2] << 40 | (X)[3] << 32 | (X)[4] << 24 | (X)[5] << 16 | (X)[6] << 8 | (X)[7] )
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175 | #define X_FREE(X) do { if (X) { free(X); X = NULL; } } while(0)
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176 |
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177 | typedef unsigned char uint8;
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178 | typedef unsigned short uint16;
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179 | typedef unsigned int uint32;
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180 | typedef unsigned long long uint64;
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181 |
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182 | typedef enum {
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183 | DECRYPT,
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184 | ENCRYPT
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185 | } cc_crypt_mode_t;
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186 |
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187 | typedef enum
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188 | {
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189 | MSG_CLI_DATA,
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190 | MSG_CW,
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191 | MSG_ECM = 1,
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192 | MSG_CARD_REMOVED = 4,
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193 | MSG_DCW_SOMETHING, // this still needs to be worked out
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194 | MSG_PING,
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195 | MSG_NEW_CARD,
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196 | MSG_SRV_DATA,
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197 | MSG_CW_NOK1 = 0xfe,
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198 | MSG_CW_NOK2 = 0xff,
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199 | MSG_NO_HEADER = 0xffff
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200 | } cc_msg_type_t;
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201 |
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202 | struct cc_crypt_block
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203 | {
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204 | uint8 keytable[256];
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205 | uint8 state;
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206 | uint8 counter;
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207 | uint8 sum;
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208 | };
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209 |
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210 | struct cc_card {
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211 | uint32 id; // cccam card (share) id
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212 | uint16 caid;
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213 | uint8 hop;
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214 | uint8 key[8]; // card serial (for au)
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215 | LLIST *provs; // providers
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216 | LLIST *badsids; // sids that have failed to decode
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217 | };
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218 |
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219 | struct cc_data {
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220 | struct cc_crypt_block block[2]; // crypto state blocks
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221 |
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222 | uint8 node_id[8], // client node id
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223 | server_node_id[8], // server node id
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224 | dcw[16]; // control words
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225 |
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226 | struct cc_card *cur_card; // ptr to selected card
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227 | LLIST *cards; // cards list
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228 |
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229 | uint32 count;
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230 | };
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231 |
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232 | static unsigned int seed;
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233 | static uchar fast_rnd()
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234 | {
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235 | unsigned int offset = 12923;
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236 | unsigned int multiplier = 4079;
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237 |
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238 | seed = seed * multiplier + offset;
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239 | return (uchar)(seed % 0xFF);
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240 | }
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241 |
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242 |
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243 | static void cc_init_crypt(struct cc_crypt_block *block, uint8 *key, int len)
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244 | {
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245 | int i = 0 ;
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246 | uint8 j = 0;
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247 |
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248 | for (i=0; i<256; i++) {
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249 | block->keytable[i] = i;
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250 | }
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251 |
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252 | for (i=0; i<256; i++) {
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253 | j += key[i % len] + block->keytable[i];
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254 | SWAPC(&block->keytable[i], &block->keytable[j]);
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255 | }
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256 |
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257 | block->state = *key;
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258 | block->counter=0;
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259 | block->sum=0;
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260 | }
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261 |
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262 | static void cc_crypt(struct cc_crypt_block *block, uint8 *data, int len, cc_crypt_mode_t mode)
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263 | {
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264 | int i;
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265 | uint8 z;
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266 |
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267 | for (i = 0; i < len; i++) {
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268 | block->counter++;
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269 | block->sum += block->keytable[block->counter];
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270 | SWAPC(&block->keytable[block->counter], &block->keytable[block->sum]);
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271 | z = data[i];
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272 | data[i] = z ^ block->keytable[(block->keytable[block->counter] + block->keytable[block->sum]) & 0xff] ^ block->state;
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273 | if (!mode) z = data[i];
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274 | block->state = block->state ^ z;
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275 | }
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276 | }
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277 |
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278 | static void cc_xor(uint8 *buf)
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279 | {
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280 | const char cccam[] = "CCcam";
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281 | uint8 i;
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282 |
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283 | for ( i = 0; i < 8; i++ ) {
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284 | buf[8 + i] = i * buf[i];
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285 | if ( i <= 5 ) {
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286 | buf[i] ^= cccam[i];
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287 | }
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288 | }
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289 | }
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290 |
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291 | static void cc_cw_decrypt(uint8 *cws)
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292 | {
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293 | struct cc_data *cc = reader[ridx].cc;
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294 |
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295 | uint32 cur_card = cc->cur_card->id;
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296 | uint32 node_id_1 = B32(cc->node_id);
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297 | uint32 node_id_2 = B32(cc->node_id + 4);
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298 | uint32 tmp;
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299 | int i;
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300 |
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301 | for (i = 0; i < 16; i++) {
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302 | tmp = cws[i] ^ node_id_2;
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303 | if (i & 1) {
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304 | tmp = ~tmp;
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305 | }
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306 | cws[i] = cur_card ^ tmp;
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307 | node_id_2 = (node_id_2 >> 4) | (node_id_1 << 28);
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308 | node_id_1 >>= 4;
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309 | cur_card >>= 2;
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310 | }
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311 | }
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312 |
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313 | static int connect_nonb(int sockfd, const struct sockaddr *saptr, socklen_t salen, int nsec)
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314 | {
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315 | int flags, n, error;
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316 | socklen_t len;
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317 | fd_set rset, wset;
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318 | struct timeval tval;
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319 |
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320 | flags = fcntl(sockfd, F_GETFL, 0);
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321 | fcntl(sockfd, F_SETFL, flags | O_NONBLOCK);
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322 |
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323 | error = 0;
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324 | cs_debug("cccam: conn_nb 1 (fd=%d)", sockfd);
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325 |
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326 | if ( (n = connect(sockfd, saptr, salen)) < 0) {
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327 | if( errno==EALREADY ) {
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328 | cs_debug("cccam: conn_nb in progress, errno=%d", errno);
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329 | return(-1);
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330 | }
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331 | else if( errno==EISCONN ) {
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332 | cs_debug("cccam: conn_nb already connected, errno=%d", errno);
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333 | goto done;
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334 | }
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335 | cs_debug("cccam: conn_nb 2 (fd=%d)", sockfd);
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336 | if (errno != EINPROGRESS) {
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337 | cs_debug("cccam: conn_nb 3 (fd=%d)", sockfd);
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338 | return(-1);
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339 | }
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340 | }
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341 |
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342 | cs_debug("cccam: n = %d\n", n);
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343 |
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344 | /* Do whatever we want while the connect is taking place. */
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345 | if (n == 0)
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346 | goto done; /* connect completed immediately */
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347 |
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348 | FD_ZERO(&rset);
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349 | FD_SET(sockfd, &rset);
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350 | wset = rset;
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351 | tval.tv_sec = nsec;
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352 | tval.tv_usec = 0;
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353 |
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354 | if ( (n = select(sockfd+1, &rset, &wset, 0, nsec ? &tval : 0)) == 0) {
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355 | //close(sockfd); // timeout
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356 | cs_debug("cccam: conn_nb 4 (fd=%d)", sockfd);
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357 | errno = ETIMEDOUT;
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358 | return(-1);
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359 | }
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360 |
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361 | cs_debug("cccam: conn_nb 5 (fd=%d)", sockfd);
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362 |
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363 | if (FD_ISSET(sockfd, &rset) || FD_ISSET(sockfd, &wset)) {
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364 | cs_debug("cccam: conn_nb 6 (fd=%d)", sockfd);
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365 | len = sizeof(error);
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366 | if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
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367 | cs_debug("cccam: conn_nb 7 (fd=%d)", sockfd);
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368 | return(-1); // Solaris pending error
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369 | }
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370 | } else {
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371 | cs_debug("cccam: conn_nb 8 (fd=%d)", sockfd);
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372 | return -2;
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373 | }
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374 |
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375 | done:
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376 | cs_debug("cccam: conn_nb 9 (fd=%d)", sockfd);
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377 | fcntl(sockfd, F_SETFL, flags); /* restore file status flags */
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378 |
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379 | if (error) {
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380 | cs_debug("cccam: conn_nb 10 (fd=%d)", sockfd);
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381 | //close(sockfd); /* just in case */
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382 | errno = error;
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383 | return(-1);
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384 | }
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385 | return(0);
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386 | }
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387 |
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388 | static int network_tcp_connection_open(uint8 *hostname, uint16 port)
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389 | {
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390 |
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391 | int flags;
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392 | if( connect_nonb(client[cs_idx].udp_fd,
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393 | (struct sockaddr *)&client[cs_idx].udp_sa,
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394 | sizeof(client[cs_idx].udp_sa), 5) < 0)
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395 | {
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396 | cs_log("cccam: connect(fd=%d) failed: (errno=%d)", client[cs_idx].udp_fd, errno);
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397 | return -1;
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398 | }
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399 | flags = fcntl(client[cs_idx].udp_fd, F_GETFL, 0);
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400 | flags &=~ O_NONBLOCK;
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401 | fcntl(client[cs_idx].udp_fd, F_SETFL, flags );
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402 |
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403 | return client[cs_idx].udp_fd;
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404 | }
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405 |
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406 | static int cc_msg_recv(uint8 *buf, int l)
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407 | {
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408 | int len, flags;
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409 | uint8 netbuf[CC_MAXMSGSIZE];
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410 |
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411 | struct cc_data *cc = reader[ridx].cc;
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412 | int handle = client[cs_idx].udp_fd;
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413 |
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414 | if (handle < 0) return -1;
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415 |
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416 | len = recv(handle, netbuf, 4, MSG_WAITALL);
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417 |
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418 | if (!len) return 0;
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419 |
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420 | if (len != 4) { // invalid header length read
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421 | cs_log("cccam: invalid header length");
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422 | return -1;
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423 | }
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424 |
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425 | cc_crypt(&cc->block[DECRYPT], netbuf, 4, DECRYPT);
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426 | //cs_ddump(netbuf, 4, "cccam: decrypted header:");
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427 |
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428 | flags = netbuf[0];
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429 |
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430 | if (((netbuf[2] << 8) | netbuf[3]) != 0) { // check if any data is expected in msg
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431 | if (((netbuf[2] << 8) | netbuf[3]) > CC_MAXMSGSIZE - 2) {
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432 | cs_log("cccam: message too big");
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433 | return -1;
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434 | }
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435 |
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436 | len = recv(handle, netbuf+4, (netbuf[2] << 8) | netbuf[3], MSG_WAITALL); // read rest of msg
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437 |
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438 | if (len != ((netbuf[2] << 8) | netbuf[3])) {
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439 | cs_log("cccam: invalid message length read");
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440 | return -1;
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441 | }
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442 |
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443 | cc_crypt(&cc->block[DECRYPT], netbuf+4, len, DECRYPT);
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444 | len += 4;
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445 | }
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446 |
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447 | //cs_ddump(netbuf, len, "cccam: full decrypted msg, len=%d:", len);
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448 |
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449 | memcpy(buf, netbuf, len);
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450 | return len;
|
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451 | }
|
---|
452 |
|
---|
453 | static int cc_cmd_send(uint8 *buf, int len, cc_msg_type_t cmd)
|
---|
454 | {
|
---|
455 | int n;
|
---|
456 | uint8 *netbuf = malloc(len+4);
|
---|
457 | struct cc_data *cc = reader[ridx].cc;
|
---|
458 |
|
---|
459 | bzero(netbuf, len+4);
|
---|
460 |
|
---|
461 | if (cmd == MSG_NO_HEADER) {
|
---|
462 | memcpy(netbuf, buf, len);
|
---|
463 | } else {
|
---|
464 | // build command message
|
---|
465 | netbuf[0] = 0; // flags??
|
---|
466 | netbuf[1] = cmd & 0xff;
|
---|
467 | netbuf[2] = len >> 8;
|
---|
468 | netbuf[3] = len & 0xff;
|
---|
469 | if (buf) memcpy(netbuf+4, buf, len);
|
---|
470 | len += 4;
|
---|
471 | }
|
---|
472 |
|
---|
473 | cc_crypt(&cc->block[ENCRYPT], netbuf, len, ENCRYPT);
|
---|
474 |
|
---|
475 | cs_ddump(buf, len, "cccam: send:");
|
---|
476 | //cs_ddump(netbuf, len, "cccam: send enc:");
|
---|
477 | n = send(client[cs_idx].udp_fd, netbuf, len, 0);
|
---|
478 |
|
---|
479 | X_FREE(netbuf);
|
---|
480 |
|
---|
481 | return n;
|
---|
482 | }
|
---|
483 |
|
---|
484 | static int cc_send_cli_data()
|
---|
485 | {
|
---|
486 | int i;
|
---|
487 | struct cc_data *cc = reader[ridx].cc;
|
---|
488 |
|
---|
489 | cs_debug("cccam: send client data");
|
---|
490 |
|
---|
491 | //memcpy(cc->node_id, "\x7A\xDD\xAB\x28\xC9\x39\x4A\x2F", 8);
|
---|
492 |
|
---|
493 | seed = (unsigned int) time((time_t*)0);
|
---|
494 | for( i=0; i<8; i++ ) cc->node_id[i]=fast_rnd();
|
---|
495 |
|
---|
496 | uint8 buf[CC_MAXMSGSIZE];
|
---|
497 | bzero(buf, CC_MAXMSGSIZE);
|
---|
498 |
|
---|
499 | memcpy(buf, reader[ridx].r_usr, strlen(reader[ridx].r_usr) );
|
---|
500 | memcpy(buf + 20, cc->node_id, 8 );
|
---|
501 | memcpy(buf + 29, reader[ridx].cc_version, strlen(reader[ridx].cc_version)); // cccam version (ascii)
|
---|
502 | memcpy(buf + 61, reader[ridx].cc_build, strlen(reader[ridx].cc_build)); // build number (ascii)
|
---|
503 |
|
---|
504 | return cc_cmd_send(buf, 20 + 8 + 6 + 26 + 4 + 28 + 1, MSG_CLI_DATA);
|
---|
505 | }
|
---|
506 |
|
---|
507 | static int cc_send_ecm(ECM_REQUEST *er, uchar *buf)
|
---|
508 | {
|
---|
509 | int n, h = -1;
|
---|
510 | struct cc_data *cc = reader[ridx].cc;
|
---|
511 | struct cc_card *card;
|
---|
512 | LLIST_ITR itr;
|
---|
513 |
|
---|
514 | memcpy(buf, er->ecm, er->l);
|
---|
515 |
|
---|
516 | cc->cur_card = NULL;
|
---|
517 |
|
---|
518 | card = llist_itr_init(cc->cards, &itr);
|
---|
519 |
|
---|
520 | while (card) {
|
---|
521 | if (card->caid == er->caid) { // caid matches
|
---|
522 | LLIST_ITR pitr;
|
---|
523 | char *prov = llist_itr_init(card->provs, &pitr);
|
---|
524 | while (prov) {
|
---|
525 | if (B24(prov) == er->prid) { // provid matches
|
---|
526 | if ((h < 0) || (card->hop < h)) { // card is closer
|
---|
527 | cc->cur_card = card;
|
---|
528 | h = card->hop; // card has been matched
|
---|
529 | }
|
---|
530 | }
|
---|
531 | prov = llist_itr_next(&pitr);
|
---|
532 | }
|
---|
533 | llist_itr_release(&pitr);
|
---|
534 | }
|
---|
535 | card = llist_itr_next(&itr);
|
---|
536 | }
|
---|
537 | llist_itr_release(&itr);
|
---|
538 |
|
---|
539 | if (cc->cur_card) {
|
---|
540 | uint8 *ecmbuf = malloc(er->l+13);
|
---|
541 | bzero(ecmbuf, er->l+13);
|
---|
542 |
|
---|
543 | // build ecm message
|
---|
544 | ecmbuf[0] = cc->cur_card->caid >> 8;
|
---|
545 | ecmbuf[1] = cc->cur_card->caid & 0xff;
|
---|
546 | ecmbuf[2] = er->prid >> 24;
|
---|
547 | ecmbuf[3] = er->prid >> 16;
|
---|
548 | ecmbuf[4] = er->prid >> 8;
|
---|
549 | ecmbuf[5] = er->prid & 0xff;
|
---|
550 | ecmbuf[6] = cc->cur_card->id >> 24;
|
---|
551 | ecmbuf[7] = cc->cur_card->id >> 16;
|
---|
552 | ecmbuf[8] = cc->cur_card->id >> 8;
|
---|
553 | ecmbuf[9] = cc->cur_card->id & 0xff;
|
---|
554 | ecmbuf[10] = er->srvid >> 8;
|
---|
555 | ecmbuf[11] = er->srvid & 0xff;
|
---|
556 | ecmbuf[12] = er->l & 0xff;
|
---|
557 | memcpy(ecmbuf+13, buf, er->l);
|
---|
558 |
|
---|
559 | cc->count = er->idx;
|
---|
560 |
|
---|
561 | cs_log("cccam: sending ecm for sid %04x to card %08x, hop %d", er->srvid, cc->cur_card->id, cc->cur_card->hop);
|
---|
562 | n = cc_cmd_send(ecmbuf, er->l+13, MSG_ECM); // send ecm
|
---|
563 |
|
---|
564 | X_FREE(ecmbuf);
|
---|
565 | } else {
|
---|
566 | n = -1;
|
---|
567 | cs_log("cccam: no suitable card on server");
|
---|
568 | }
|
---|
569 |
|
---|
570 | if (n) return 0;
|
---|
571 | else return -1;
|
---|
572 | }
|
---|
573 |
|
---|
574 | static cc_msg_type_t cc_parse_msg(uint8 *buf, int l)
|
---|
575 | {
|
---|
576 | struct cc_data *cc = reader[ridx].cc;
|
---|
577 |
|
---|
578 | switch (buf[1]) {
|
---|
579 | case MSG_CLI_DATA:
|
---|
580 | cs_debug("cccam: client data ack");
|
---|
581 | break;
|
---|
582 | case MSG_SRV_DATA:
|
---|
583 | memcpy(cc->server_node_id, buf+4, 8);
|
---|
584 | cs_log("cccam: srv %s running v%s (%s)", cs_hexdump(0, cc->server_node_id, 8), buf+12, buf+44);
|
---|
585 | break;
|
---|
586 | case MSG_NEW_CARD:
|
---|
587 | if (B16(buf+12) == reader[ridx].ctab.caid[0]) { // only add cards with relevant caid (for now)
|
---|
588 | int i;
|
---|
589 | struct cc_card *card = malloc(sizeof(struct cc_card));
|
---|
590 |
|
---|
591 | bzero(card, sizeof(struct cc_card));
|
---|
592 |
|
---|
593 | card->provs = llist_create();
|
---|
594 | card->id = B32(buf+4);
|
---|
595 | card->caid = B16(buf+12);
|
---|
596 | card->hop = buf[14];
|
---|
597 | memcpy(card->key, buf+16, 8);
|
---|
598 |
|
---|
599 | cs_debug("cccam: card %08x added, caid %04x, hop %d, key %s",
|
---|
600 | card->id, card->caid, card->hop, cs_hexdump(0, card->key, 8));
|
---|
601 |
|
---|
602 | for (i = 0; i < buf[24]; i++) { // providers
|
---|
603 | uint8 *prov = malloc(3);
|
---|
604 |
|
---|
605 | memcpy(prov, buf+25+(7*i), 3);
|
---|
606 | cs_debug(" prov %d, %06x", i+1, B24(prov));
|
---|
607 |
|
---|
608 | llist_append(card->provs, prov);
|
---|
609 | }
|
---|
610 |
|
---|
611 | llist_append(cc->cards, card);
|
---|
612 | if (!cc->cur_card) cc->cur_card = card;
|
---|
613 | }
|
---|
614 | break;
|
---|
615 | case MSG_CARD_REMOVED:
|
---|
616 | {
|
---|
617 | struct cc_card *card;
|
---|
618 | LLIST_ITR itr;
|
---|
619 |
|
---|
620 | card = llist_itr_init(cc->cards, &itr);
|
---|
621 | while (card) {
|
---|
622 | if (card->id == B32(buf+4)) {
|
---|
623 | cs_debug("cccam: card %08x removed, caid %04x", card->id, card->caid);
|
---|
624 |
|
---|
625 | llist_destroy(card->provs);
|
---|
626 | free(card);
|
---|
627 |
|
---|
628 | card = llist_itr_remove(&itr);
|
---|
629 | break;
|
---|
630 | } else {
|
---|
631 | card = llist_itr_next(&itr);
|
---|
632 | }
|
---|
633 | }
|
---|
634 | llist_itr_release(&itr);
|
---|
635 | }
|
---|
636 | break;
|
---|
637 | case MSG_CW_NOK1:
|
---|
638 | case MSG_CW_NOK2:
|
---|
639 | cs_log("cccam: cw nok");
|
---|
640 | break;
|
---|
641 | case MSG_CW:
|
---|
642 | cc_cw_decrypt(buf+4);
|
---|
643 | memcpy(cc->dcw, buf+4, 16);
|
---|
644 | cs_debug("cccam: cws: %s", cs_hexdump(0, cc->dcw, 16));
|
---|
645 | cc_crypt(&cc->block[DECRYPT], buf+4, l-4, ENCRYPT); // additional crypto step
|
---|
646 | return 0;
|
---|
647 | break;
|
---|
648 | case MSG_PING:
|
---|
649 | cc_cmd_send(NULL, 0, MSG_PING);
|
---|
650 | break;
|
---|
651 | default:
|
---|
652 | break;
|
---|
653 | }
|
---|
654 |
|
---|
655 | return buf[1];
|
---|
656 | }
|
---|
657 |
|
---|
658 | static int cc_recv_chk(uchar *dcw, int *rc, uchar *buf, int n)
|
---|
659 | {
|
---|
660 | struct cc_data *cc = reader[ridx].cc;
|
---|
661 |
|
---|
662 | if (buf[1] == MSG_CW) {
|
---|
663 | memcpy(dcw, cc->dcw, 16);
|
---|
664 | cs_debug("cccam: recv chk - MSG_CW %d - %s", cc->count, cs_hexdump(0, dcw, 16));
|
---|
665 | *rc = 1;
|
---|
666 | //return 0;
|
---|
667 | return(cc->count);
|
---|
668 | }
|
---|
669 |
|
---|
670 | return -1;
|
---|
671 | }
|
---|
672 |
|
---|
673 | int cc_recv(uchar *buf, int l)
|
---|
674 | {
|
---|
675 | int n;
|
---|
676 | uchar *cbuf = malloc(l);
|
---|
677 |
|
---|
678 | memcpy(cbuf, buf, l); // make a copy of buf
|
---|
679 |
|
---|
680 | if (!is_server) {
|
---|
681 | if (!client[cs_idx].udp_fd) return(-1);
|
---|
682 | n = cc_msg_recv(cbuf, l); // recv and decrypt msg
|
---|
683 | } else {
|
---|
684 | return -2;
|
---|
685 | }
|
---|
686 |
|
---|
687 | cs_ddump(buf, n, "cccam: received %d bytes from %s", n, remote_txt());
|
---|
688 | client[cs_idx].last = time((time_t *) 0);
|
---|
689 |
|
---|
690 | if (n < 4) {
|
---|
691 | cs_log("cccam: packet to small (%d bytes)", n);
|
---|
692 | n = -1;
|
---|
693 | } else if (n == 0) {
|
---|
694 | cs_log("cccam: Connection closed to %s", remote_txt());
|
---|
695 | n = -1;
|
---|
696 | }
|
---|
697 |
|
---|
698 | cc_parse_msg(cbuf, n);
|
---|
699 |
|
---|
700 | memcpy(buf, cbuf, l);
|
---|
701 |
|
---|
702 | X_FREE(cbuf);
|
---|
703 |
|
---|
704 | return(n);
|
---|
705 | }
|
---|
706 |
|
---|
707 | static int cc_cli_connect(void)
|
---|
708 | {
|
---|
709 | int handle;
|
---|
710 | uint8 data[20];
|
---|
711 | uint8 hash[SHA1_DIGEST_SIZE];
|
---|
712 | uint8 buf[CC_MAXMSGSIZE];
|
---|
713 | struct cc_data *cc;
|
---|
714 |
|
---|
715 | // init internals data struct
|
---|
716 | cc = malloc(sizeof(struct cc_data));
|
---|
717 | reader[ridx].cc = cc;
|
---|
718 | bzero(reader[ridx].cc, sizeof(struct cc_data));
|
---|
719 | cc->cards = llist_create();
|
---|
720 |
|
---|
721 | // check cred config
|
---|
722 | if(reader[ridx].device[0] == 0 || reader[ridx].r_pwd[0] == 0 ||
|
---|
723 | reader[ridx].r_usr[0] == 0 || reader[ridx].r_port == 0)
|
---|
724 | return -5;
|
---|
725 |
|
---|
726 | // connect
|
---|
727 | handle = network_tcp_connection_open((uint8 *)reader[ridx].device, reader[ridx].r_port);
|
---|
728 | if(handle < 0) return -1;
|
---|
729 |
|
---|
730 | // get init seed
|
---|
731 | if(read(handle, data, 16) != 16) {
|
---|
732 | cs_log("cccam: server does not return 16 bytes");
|
---|
733 | network_tcp_connection_close(handle);
|
---|
734 | return -2;
|
---|
735 | }
|
---|
736 | cs_ddump(data, 16, "cccam: server init seed:");
|
---|
737 |
|
---|
738 | cc_xor(data); // XOR init bytes with 'CCcam'
|
---|
739 |
|
---|
740 | SHA1_CTX ctx;
|
---|
741 | SHA1_Init(&ctx);
|
---|
742 | SHA1_Update(&ctx, data, 16);
|
---|
743 | SHA1_Final(&ctx, hash);
|
---|
744 |
|
---|
745 | cs_ddump(hash, sizeof(hash), "cccam: sha1 hash:");
|
---|
746 |
|
---|
747 | //initialisate crypto states
|
---|
748 | cc_init_crypt(&cc->block[DECRYPT], hash, 20);
|
---|
749 | cc_crypt(&cc->block[DECRYPT], data, 16, DECRYPT);
|
---|
750 | cc_init_crypt(&cc->block[ENCRYPT], data, 16);
|
---|
751 | cc_crypt(&cc->block[ENCRYPT], hash, 20, DECRYPT);
|
---|
752 |
|
---|
753 | cc_cmd_send(hash, 20, MSG_NO_HEADER); // send crypted hash to server
|
---|
754 |
|
---|
755 | bzero(buf, sizeof(buf));
|
---|
756 |
|
---|
757 | memcpy(buf, reader[ridx].r_usr, strlen(reader[ridx].r_usr));
|
---|
758 | cs_ddump(buf, 20, "cccam: username '%s':", buf);
|
---|
759 | cc_cmd_send(buf, 20, MSG_NO_HEADER); // send usr '0' padded -> 20 bytes
|
---|
760 |
|
---|
761 | bzero(buf, sizeof(buf));
|
---|
762 |
|
---|
763 | cs_debug("cccam: 'CCcam' xor");
|
---|
764 | memcpy(buf, "CCcam", 5);
|
---|
765 | cc_crypt(&cc->block[ENCRYPT], (uint8 *)reader[ridx].r_pwd, strlen(reader[ridx].r_pwd), ENCRYPT); // modify encryption state w/ pwd
|
---|
766 | cc_cmd_send(buf, 6, MSG_NO_HEADER); // send 'CCcam' xor w/ pwd
|
---|
767 |
|
---|
768 | if (read(handle, data, 20) != 20) {
|
---|
769 | cs_log("ccam: login failed, pwd ack not received");
|
---|
770 | return -2;
|
---|
771 | }
|
---|
772 | cc_crypt(&cc->block[DECRYPT], data, 20, DECRYPT);
|
---|
773 | cs_ddump(data, 20, "cccam: pwd ack received:");
|
---|
774 |
|
---|
775 | if (memcmp(data, buf, 5)) { // check server response
|
---|
776 | cs_log("cccam: login failed, usr/pwd invalid");
|
---|
777 | return -2;
|
---|
778 | } else {
|
---|
779 | cs_debug("cccam: login succeeded");
|
---|
780 | }
|
---|
781 |
|
---|
782 | reader[ridx].tcp_connected = 1;
|
---|
783 | reader[ridx].last_g = reader[ridx].last_s = time((time_t *)0);
|
---|
784 |
|
---|
785 | cs_debug("cccam: last_s=%d, last_g=%d", reader[ridx].last_s, reader[ridx].last_g);
|
---|
786 |
|
---|
787 | pfd=client[cs_idx].udp_fd;
|
---|
788 |
|
---|
789 | if (cc_send_cli_data(cc)<=0) {
|
---|
790 | cs_log("cccam: login failed, could not send client data");
|
---|
791 | return -3;
|
---|
792 | }
|
---|
793 | return 0;
|
---|
794 | }
|
---|
795 |
|
---|
796 | int cc_cli_init(void)
|
---|
797 | {
|
---|
798 | static struct sockaddr_in loc_sa;
|
---|
799 | struct protoent *ptrp;
|
---|
800 | int p_proto;
|
---|
801 |
|
---|
802 | pfd=0;
|
---|
803 | if (reader[ridx].r_port<=0)
|
---|
804 | {
|
---|
805 | cs_log("cccam: invalid port %d for server %s", reader[ridx].r_port, reader[ridx].device);
|
---|
806 | return(1);
|
---|
807 | }
|
---|
808 | if( (ptrp=getprotobyname("tcp")) )
|
---|
809 | p_proto=ptrp->p_proto;
|
---|
810 | else
|
---|
811 | p_proto=6;
|
---|
812 |
|
---|
813 | client[cs_idx].ip=0;
|
---|
814 | memset((char *)&loc_sa,0,sizeof(loc_sa));
|
---|
815 | loc_sa.sin_family = AF_INET;
|
---|
816 | #ifdef LALL
|
---|
817 | if (cfg->serverip[0])
|
---|
818 | loc_sa.sin_addr.s_addr = inet_addr(cfg->serverip);
|
---|
819 | else
|
---|
820 | #endif
|
---|
821 | loc_sa.sin_addr.s_addr = INADDR_ANY;
|
---|
822 | loc_sa.sin_port = htons(reader[ridx].l_port);
|
---|
823 |
|
---|
824 | if ((client[cs_idx].udp_fd=socket(PF_INET, SOCK_STREAM, p_proto))<0)
|
---|
825 | {
|
---|
826 | cs_log("cccam: Socket creation failed (errno=%d)", errno);
|
---|
827 | cs_exit(1);
|
---|
828 | }
|
---|
829 |
|
---|
830 | #ifdef SO_PRIORITY
|
---|
831 | if (cfg->netprio)
|
---|
832 | setsockopt(client[cs_idx].udp_fd, SOL_SOCKET, SO_PRIORITY,
|
---|
833 | (void *)&cfg->netprio, sizeof(ulong));
|
---|
834 | #endif
|
---|
835 | if (!reader[ridx].tcp_ito) {
|
---|
836 | ulong keep_alive = reader[ridx].tcp_ito?1:0;
|
---|
837 | setsockopt(client[cs_idx].udp_fd, SOL_SOCKET, SO_KEEPALIVE,
|
---|
838 | (void *)&keep_alive, sizeof(ulong));
|
---|
839 | }
|
---|
840 |
|
---|
841 | memset((char *)&client[cs_idx].udp_sa,0,sizeof(client[cs_idx].udp_sa));
|
---|
842 | client[cs_idx].udp_sa.sin_family = AF_INET;
|
---|
843 | client[cs_idx].udp_sa.sin_port = htons((u_short)reader[ridx].r_port);
|
---|
844 |
|
---|
845 | struct hostent *server;
|
---|
846 | server = gethostbyname(reader[ridx].device);
|
---|
847 | bcopy((char *)server->h_addr, (char *)&client[cs_idx].udp_sa.sin_addr.s_addr, server->h_length);
|
---|
848 |
|
---|
849 | cs_log("cccam: proxy %s:%d cccam v%s (%s) (fd=%d)",
|
---|
850 | reader[ridx].device, reader[ridx].r_port, reader[ridx].cc_version,
|
---|
851 | reader[ridx].cc_build, client[cs_idx].udp_fd);
|
---|
852 |
|
---|
853 | cc_cli_connect();
|
---|
854 |
|
---|
855 | return(0);
|
---|
856 | }
|
---|
857 |
|
---|
858 | void cc_cleanup(void)
|
---|
859 | {
|
---|
860 |
|
---|
861 | }
|
---|
862 |
|
---|
863 | void module_cccam(struct s_module *ph)
|
---|
864 | {
|
---|
865 | strcpy(ph->desc, "cccam");
|
---|
866 | ph->type=MOD_CONN_TCP;
|
---|
867 | ph->logtxt = ", crypted";
|
---|
868 | ph->watchdog=1;
|
---|
869 | ph->recv=cc_recv;
|
---|
870 | ph->cleanup=cc_cleanup;
|
---|
871 | ph->c_multi=1;
|
---|
872 | ph->c_init=cc_cli_init;
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873 | ph->c_recv_chk=cc_recv_chk;
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874 | ph->c_send_ecm=cc_send_ecm;
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875 | }
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