[8] | 1 | #include "globals.h"
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| 2 |
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| 3 | #ifdef CS_ANTICASC
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| 4 |
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| 5 | //static time_t ac_last_chk;
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| 6 | static uchar ac_ecmd5[CS_ECMSTORESIZE];
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| 7 | struct s_acasc ac_stat[CS_MAXPID];
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| 8 |
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| 9 | int ac_init_log(char *file)
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| 10 | {
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| 11 | if( (!fpa) && (file[0]))
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| 12 | {
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| 13 | if( (fpa=fopen(file, "a+"))<=(FILE *)0 )
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| 14 | {
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| 15 | fpa=(FILE *)0;
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| 16 | fprintf(stderr, "can't open anti-cascading logfile: %s\n", file);
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| 17 | }
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| 18 | else
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| 19 | cs_log("anti-cascading log initialized");
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| 20 | }
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| 21 |
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| 22 | return(fpa<=(FILE *)0);
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| 23 | }
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| 24 |
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[954] | 25 | void ac_init_stat()
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[8] | 26 | {
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| 27 | memset(ac_stat, 0, sizeof(ac_stat));
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| 28 | memset(acasc, 0, sizeof(acasc));
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| 29 |
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| 30 | if( fpa )
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| 31 | fclose(fpa);
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| 32 | fpa=(FILE *)0;
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| 33 | if( ac_init_log(cfg->ac_logfile) )
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| 34 | cs_exit(0);
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| 35 | }
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| 36 |
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| 37 | int idx_from_ac_idx(int ac_idx)
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| 38 | {
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| 39 | int i;
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| 40 |
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| 41 | for( i=0; i<CS_MAXPID; i++ )
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| 42 | if( client[i].ac_idx==ac_idx ) return i;
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| 43 |
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| 44 | return -1;
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| 45 | }
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| 46 |
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| 47 | void ac_do_stat()
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| 48 | {
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[573] | 49 | int i, j, idx, exceeds, maxval, prev_deny=0;
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[8] | 50 | int cl_idx;
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| 51 |
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| 52 | for( i=0; i<CS_MAXPID; i++ )
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| 53 | {
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| 54 | idx = ac_stat[i].idx;
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[954] | 55 | ac_stat[i].stat[idx] = acasc[i].ac_count;
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| 56 | acasc[i].ac_count=0;
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[8] | 57 | cl_idx = idx_from_ac_idx(i);
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| 58 |
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| 59 | if( ac_stat[i].stat[idx] )
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| 60 | {
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| 61 | if( cl_idx==-1 ) {
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| 62 | cs_log("ERROR: can't find client with ac_idx=%d", i);
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| 63 | continue;
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| 64 | }
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| 65 |
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| 66 | if( client[cl_idx].ac_penalty==2 ) {// banned
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| 67 | cs_debug("user '%s' banned", client[cl_idx].usr);
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[954] | 68 | acasc[i].ac_deny=1;
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[8] | 69 | }
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| 70 | else
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| 71 | {
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| 72 | for( j=exceeds=maxval=0; j<cfg->ac_samples; j++ )
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| 73 | {
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| 74 | if( ac_stat[i].stat[j] > maxval )
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| 75 | maxval=ac_stat[i].stat[j];
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| 76 | exceeds+=(ac_stat[i].stat[j]>client[cl_idx].ac_limit);
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| 77 | }
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[954] | 78 | prev_deny=acasc[i].ac_deny;
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| 79 | acasc[i].ac_deny = (exceeds >= cfg->ac_denysamples);
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[8] | 80 |
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| 81 | cs_debug("%s limit=%d, max=%d, samples=%d, dsamples=%d, ac[ci=%d][si=%d]:",
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| 82 | client[cl_idx].usr, client[cl_idx].ac_limit, maxval,
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| 83 | cfg->ac_samples, cfg->ac_denysamples, i, idx);
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| 84 | cs_debug("%d %d %d %d %d %d %d %d %d %d ", ac_stat[i].stat[0],
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| 85 | ac_stat[i].stat[1], ac_stat[i].stat[2], ac_stat[i].stat[3],
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| 86 | ac_stat[i].stat[4], ac_stat[i].stat[5], ac_stat[i].stat[6],
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| 87 | ac_stat[i].stat[7], ac_stat[i].stat[8], ac_stat[i].stat[9]);
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[954] | 88 | if( acasc[i].ac_deny ) {
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[8] | 89 | cs_log("user '%s' exceeds limit", client[cl_idx].usr);
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| 90 | ac_stat[i].stat[idx] = 0;
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| 91 | } else if( prev_deny )
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| 92 | cs_log("user '%s' restored access", client[cl_idx].usr);
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| 93 | }
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| 94 | }
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[954] | 95 | else if( acasc[i].ac_deny )
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[8] | 96 | {
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| 97 | prev_deny=1;
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[954] | 98 | acasc[i].ac_deny=0;
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[8] | 99 | if( cl_idx!=-1 )
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| 100 | cs_log("restored access for inactive user '%s'", client[cl_idx].usr);
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| 101 | else
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| 102 | cs_log("restored access for unknown user (ac_idx=%d)", i);
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| 103 | }
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| 104 |
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[954] | 105 | if( !acasc[i].ac_deny && !prev_deny )
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[8] | 106 | ac_stat[i].idx = (ac_stat[i].idx + 1) % cfg->ac_samples;
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | void ac_init_client(struct s_auth *account)
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| 111 | {
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| 112 | client[cs_idx].ac_idx = account->ac_idx;
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| 113 | client[cs_idx].ac_limit = 0;
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| 114 | if( cfg->ac_enabled )
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| 115 | {
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| 116 | if( account->ac_users )
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| 117 | {
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| 118 | client[cs_idx].ac_limit = (account->ac_users*100+80)*cfg->ac_stime;
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| 119 | client[cs_idx].ac_penalty = account->ac_penalty;
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| 120 | cs_debug("login '%s', ac_idx=%d, users=%d, stime=%d min, dwlimit=%d per min, penalty=%d",
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| 121 | account->usr, account->ac_idx, account->ac_users, cfg->ac_stime,
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| 122 | account->ac_users*100+80, account->ac_penalty);
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| 123 | }
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| 124 | else
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| 125 | cs_debug("anti-cascading not used for login '%s'", account->usr);
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| 126 | }
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| 127 | }
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| 128 |
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| 129 | static int ac_dw_weight(ECM_REQUEST *er)
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| 130 | {
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| 131 | struct s_cpmap *cpmap;
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| 132 |
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| 133 | for( cpmap=cfg->cpmap; (cpmap) ; cpmap=cpmap->next )
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| 134 | if( (cpmap->caid ==0 || cpmap->caid ==er->caid) &&
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| 135 | (cpmap->provid==0 || cpmap->provid==er->prid) &&
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| 136 | (cpmap->sid ==0 || cpmap->sid ==er->srvid) &&
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| 137 | (cpmap->chid ==0 || cpmap->chid ==er->chid) )
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| 138 | return (cpmap->dwtime*100/60);
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| 139 |
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[21] | 140 | cs_debug("WARNING: CAID %04X, PROVID %06X, SID %04X, CHID %04X not found in oscam.ac",
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[8] | 141 | er->caid, er->prid, er->srvid, er->chid);
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| 142 | cs_debug("set DW lifetime 10 sec");
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| 143 | return 16; // 10*100/60
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| 144 | }
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| 145 |
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| 146 | void ac_chk(ECM_REQUEST *er, int level)
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| 147 | {
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| 148 | if( !client[cs_idx].ac_limit || !cfg->ac_enabled ) return;
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| 149 |
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| 150 | if( level==1 )
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| 151 | {
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[954] | 152 | if( er->rc==7 ) acasc[client[cs_idx].ac_idx].ac_count++;
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[8] | 153 | if( er->rc>3 ) return; // not found
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| 154 | if( memcmp(ac_ecmd5, er->ecmd5, CS_ECMSTORESIZE) != 0 )
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| 155 | {
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[954] | 156 | acasc[client[cs_idx].ac_idx].ac_count+=ac_dw_weight(er);
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[8] | 157 | memcpy(ac_ecmd5, er->ecmd5, CS_ECMSTORESIZE);
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| 158 | }
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| 159 | return;
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| 160 | }
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| 161 |
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[954] | 162 | if( acasc[client[cs_idx].ac_idx].ac_deny )
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[8] | 163 | if( client[cs_idx].ac_penalty )
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| 164 | {
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| 165 | cs_debug("send fake dw");
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| 166 | er->rc=7; // fake
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| 167 | er->rcEx=0;
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| 168 | cs_sleepms(cfg->ac_fakedelay);
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| 169 | }
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| 170 | }
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| 171 | #endif
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