gbproxy: Only search by valid identifiers
Don't return a link_info if TLLI is 0 resp. P-TMSI is 0xffff. These values are used for uninitialised or cleared fields and can possibly match several entries. Sponsored-by: On-Waves ehf
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@ -38,6 +38,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_tlli(struct gbproxy_peer *peer,
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struct gbproxy_link_info *link_info;
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struct gbproxy_patch_state *state = &peer->patch_state;
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if (!tlli)
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return NULL;
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llist_for_each_entry(link_info, &state->logical_links, list)
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if (link_info->tlli.current == tlli ||
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link_info->tlli.assigned == tlli)
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@ -53,6 +56,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_ptmsi(
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struct gbproxy_link_info *link_info;
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struct gbproxy_patch_state *state = &peer->patch_state;
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if (ptmsi == GSM_RESERVED_TMSI)
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return NULL;
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llist_for_each_entry(link_info, &state->logical_links, list)
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if (link_info->tlli.ptmsi == ptmsi)
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return link_info;
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@ -67,6 +73,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_any_sgsn_tlli(
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struct gbproxy_link_info *link_info;
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struct gbproxy_patch_state *state = &peer->patch_state;
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if (!tlli)
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return NULL;
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/* Don't care about the NSEI */
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llist_for_each_entry(link_info, &state->logical_links, list)
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if (link_info->sgsn_tlli.current == tlli ||
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@ -83,6 +92,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_sgsn_tlli(
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struct gbproxy_link_info *link_info;
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struct gbproxy_patch_state *state = &peer->patch_state;
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if (!tlli)
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return NULL;
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llist_for_each_entry(link_info, &state->logical_links, list)
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if ((link_info->sgsn_tlli.current == tlli ||
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link_info->sgsn_tlli.assigned == tlli) &&
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