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gbproxy: Only search by valid identifiers

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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
This commit is contained in:
Jacob Erlbeck
2014-09-19 16:14:14 +02:00
committed by Holger Hans Peter Freyther
parent d4c79a458b
commit ba6267f05a
1 changed files with 12 additions and 0 deletions
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12
openbsc/src/gprs/gb_proxy_tlli.c
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@@ -38,6 +38,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_tlli(struct gbproxy_peer *peer,
struct gbproxy_link_info *link_info;
struct gbproxy_patch_state *state = &peer->patch_state;
if (!tlli)
return NULL;
llist_for_each_entry(link_info, &state->logical_links, list)
if (link_info->tlli.current == tlli ||
link_info->tlli.assigned == tlli)
@@ -53,6 +56,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_ptmsi(
struct gbproxy_link_info *link_info;
struct gbproxy_patch_state *state = &peer->patch_state;
if (ptmsi == GSM_RESERVED_TMSI)
return NULL;
llist_for_each_entry(link_info, &state->logical_links, list)
if (link_info->tlli.ptmsi == ptmsi)
return link_info;
@@ -67,6 +73,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_any_sgsn_tlli(
struct gbproxy_link_info *link_info;
struct gbproxy_patch_state *state = &peer->patch_state;
if (!tlli)
return NULL;
/* Don't care about the NSEI */
llist_for_each_entry(link_info, &state->logical_links, list)
if (link_info->sgsn_tlli.current == tlli ||
@@ -83,6 +92,9 @@ struct gbproxy_link_info *gbproxy_link_info_by_sgsn_tlli(
struct gbproxy_link_info *link_info;
struct gbproxy_patch_state *state = &peer->patch_state;
if (!tlli)
return NULL;
llist_for_each_entry(link_info, &state->logical_links, list)
if ((link_info->sgsn_tlli.current == tlli ||
link_info->sgsn_tlli.assigned == tlli) &&