gbproxy: Check tlli_info when patching, fix APN patching
Currently the numeric TLLI or tlli_info's enable_patching flag is
used to decide, whether a APN shall be patched or the secondary SGSN
shall be used. Using the numeric TLLI imposes a problem, when
TLLI/P-TMSI patching is used, since gbproxy_check_tlli uses the BSS
side TLLI namespace when trying to get the tlli_info.
This patch modifies the gbproxy_check_tlli() function to accept a
tlli_info pointer instead of a numeric TLLI. The tlli_info is already
available when the function is called. Since this a similar approach
has been used by accessing the enable_patching flag directly, this
commit unifies checking by always using this function instead of the
flag outside of gb_proxy_tlli.c.
This fixes the APN patching that doesn't work currently when P-TMSI
patching is enabled.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/gprs/gb_proxy_patch.c b/openbsc/src/gprs/gb_proxy_patch.c
index 32e844e..c1b88d9 100644
--- a/openbsc/src/gprs/gb_proxy_patch.c
+++ b/openbsc/src/gprs/gb_proxy_patch.c
@@ -278,7 +278,7 @@
if (parse_ctx->apn_ie &&
peer->cfg->core_apn &&
!parse_ctx->to_bss &&
- gbproxy_check_tlli(peer, parse_ctx->tlli)) {
+ gbproxy_check_tlli(peer, tlli_info)) {
size_t new_len;
gbproxy_patch_apn_ie(msg,
parse_ctx->apn_ie, parse_ctx->apn_ie_len,