err log: fully log MS supported A5 algos on mismatch
Change-Id: Icb18e0f0bb420de066e7eb8fc683f192ba2a7368
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@ -118,6 +118,41 @@ static bool classmark_is_r99(struct gsm_classmark *cm)
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return classmark2_is_r99(cm->classmark2, cm->classmark2_len);
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}
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static const char *classmark_a5_name(const struct gsm_classmark *cm)
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{
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static char buf[128];
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char cm1[42];
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char cm2[42];
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char cm3[42];
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if (cm->classmark1_set)
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snprintf(cm1, sizeof(cm1), "cm1{a5/1=%s}",
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cm->classmark1.a5_1 ? "not-supported":"supported" /* inverted logic */);
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else
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snprintf(cm1, sizeof(cm1), "no-cm1");
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if (cm->classmark2_len >= 3)
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snprintf(cm2, sizeof(cm2), " cm2{0x%x=%s%s}",
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cm->classmark2[2],
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cm->classmark2[2] & 0x1 ? " A5/2" : "",
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cm->classmark2[2] & 0x2 ? " A5/3" : "");
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else
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snprintf(cm2, sizeof(cm2), " no-cm2");
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if (cm->classmark3_len >= 1)
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snprintf(cm3, sizeof(cm3), " cm3{0x%x=%s%s%s%s}",
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cm->classmark3[0],
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cm->classmark3[0] & (1 << 0) ? " A5/4" : "",
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cm->classmark3[0] & (1 << 1) ? " A5/5" : "",
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cm->classmark3[0] & (1 << 2) ? " A5/6" : "",
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cm->classmark3[0] & (1 << 3) ? " A5/7" : "");
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else
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snprintf(cm3, sizeof(cm3), " no-cm3");
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snprintf(buf, sizeof(buf), "%s%s%s", cm1, cm2, cm3);
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return buf;
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}
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/* Determine if the given CLASSMARK (1/2/3) value permits a given A5/n cipher.
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* Return 1 when the given A5/n is permitted, 0 when not, and negative if the respective MS CLASSMARK is
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* not known, where the negative number indicates the classmark type: -2 means Classmark 2 is not
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@ -1617,8 +1652,9 @@ int ran_conn_geran_set_cipher_mode(struct ran_conn *conn, bool umts_aka, bool re
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if (ei.perm_algo_len == 0) {
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LOGP(DMM, LOGL_ERROR, "%s: cannot start ciphering, no intersection "
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"between MSC-configured and MS-supported A5 algorithms\n",
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vlr_subscr_name(conn->vsub));
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"between MSC-configured and MS-supported A5 algorithms. MSC: %x MS: %s\n",
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vlr_subscr_name(conn->vsub), net->a5_encryption_mask,
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classmark_a5_name(&conn->vsub->classmark));
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return -ENOTSUP;
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}
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