gbproxy: Refactor gb_proxy.c into several files
This patch moves several functions and declarations out of gb_proxy.c
to make them reusable by other components and to separate them by
context and task.
Counter enums (prefix is changed to gbproxy_):
enum gbprox_global_ctr -> gprs/gb_proxy.h
enum gbprox_peer_ctr -> gprs/gb_proxy.h
Generic Gb parsing (prefix is changed to gprs_gb_):
struct gbproxy_parse_context -> openbsc/gprs_gb_parse.h
gbprox_parse_dtap() -> gprs/gprs_gb_parse.c
gbprox_parse_llc() -> gprs/gprs_gb_parse.c
gbprox_parse_bssgp() -> gprs/gprs_gb_parse.c
gbprox_log_parse_context() -> gprs/gprs_gb_parse.c
*_shift(), *_match() -> gprs/gprs_gb_parse.c (no prefix)
gbprox_parse_gmm_* -> gprs/gprs_gb_parse.c (static)
gbprox_parse_gsm_* -> gprs/gprs_gb_parse.c (static)
MI testing/parsing (prefix gprs_ added):
is_mi_tmsi() -> gprs/gprs_utils.c
is_mi_imsi() -> gprs/gprs_utils.c
parse_mi_tmsi() -> gprs/gprs_utils.c
TLLI state handling (prefix is changed to gbproxy_):
gbprox_*tlli* -> gprs/gb_proxy_tlli.c
(except gbprox_patch_tlli, gbproxy_make_sgsn_tlli)
Message patching (prefix is changed to gbproxy_):
gbprox_*patch* -> gprs/gb_proxy_patch.c
gbprox_check_imsi -> gprs/gb_proxy_patch.c
Sponsored-by: On-Waves ehf
diff --git a/openbsc/include/openbsc/gprs_gb_parse.h b/openbsc/include/openbsc/gprs_gb_parse.h
new file mode 100644
index 0000000..e5ef4ef
--- /dev/null
+++ b/openbsc/include/openbsc/gprs_gb_parse.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <openbsc/gprs_llc.h>
+
+#include <sys/types.h>
+
+struct gprs_gb_parse_context {
+ /* Pointer to protocol specific parts */
+ struct gsm48_hdr *g48_hdr;
+ struct bssgp_normal_hdr *bgp_hdr;
+ struct bssgp_ud_hdr *bud_hdr;
+ uint8_t *bssgp_data;
+ size_t bssgp_data_len;
+ uint8_t *llc;
+ size_t llc_len;
+
+ /* Extracted information */
+ struct gprs_llc_hdr_parsed llc_hdr_parsed;
+ struct tlv_parsed bssgp_tp;
+ int to_bss;
+ uint8_t *tlli_enc;
+ uint8_t *imsi;
+ size_t imsi_len;
+ uint8_t *apn_ie;
+ size_t apn_ie_len;
+ uint8_t *ptmsi_enc;
+ uint8_t *new_ptmsi_enc;
+ uint8_t *raid_enc;
+ uint8_t *old_raid_enc;
+ uint8_t *bssgp_raid_enc;
+ uint8_t *bssgp_ptimsi;
+
+ /* General info */
+ const char *llc_msg_name;
+ int invalidate_tlli;
+ int need_decryption;
+ uint32_t tlli;
+ int pdu_type;
+ int old_raid_matches;
+};
+
+int gprs_gb_parse_dtap(uint8_t *data, size_t data_len,
+ struct gprs_gb_parse_context *parse_ctx) __attribute__((nonnull));
+
+int gprs_gb_parse_llc(uint8_t *llc, size_t llc_len,
+ struct gprs_gb_parse_context *parse_ctx) __attribute__((nonnull));
+
+int gprs_gb_parse_bssgp(uint8_t *bssgp, size_t bssgp_len,
+ struct gprs_gb_parse_context *parse_ctx) __attribute__((nonnull));
+
+void gprs_gb_log_parse_context(struct gprs_gb_parse_context *parse_ctx,
+ const char *default_msg_name) __attribute__((nonnull(1)));