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authorNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-07-26 17:31:53 +0200
committerNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-08-09 13:53:26 +0200
commitb711e1450444c5882a8d9a941094183484fa47db (patch)
treefb87d6b64bc6d3bb59ea4299db00ce1debf0bea4 /include
parent81a029a4e46bb7c62b2401ec055fe44c5b7568cd (diff)
add OSMO_SS7_PC_INVALID, add osmo_ss7_pc_is_valid()
Introduce OSMO_SS7_PC_INVALID to mark an unset point code. Add static osmo_ss7_pc_is_valid() (name matches schema of osmo_ss7_pc_is_local()). In osmo_ss7_pointcode_print(), return "(no PC)" if !osmo_ss7_pc_is_valid(), for convenient printing of any PC state. Subsequent patches will use this for osmo_ss7_instance (I7f0f0c89b7335d9da24161bfac8234be214ca00c) as well as osmo_sccp_user (I8684c9b559712072c772012890bbf7efa7c8eb35). Rationale: Currently, in osmo_ss7_vty.c we had "if (inst->cfg.primary_pc)" suggesting 0 is invalid, but in struct osmo_sccp_user we have flag pc_valid suggesting 0 is indeed valid. All known point code formats are <= 24bit, so we can easily use 0xffffffff as indicator for an unset PC, which removes the need to remember to set a second field for validity and keeps the structs nice and lean. Change-Id: Ib5715bf03a4de7713a7a809dfd821c700255ba8c
Diffstat (limited to 'include')
-rw-r--r--include/osmocom/sigtran/osmo_ss7.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/osmocom/sigtran/osmo_ss7.h b/include/osmocom/sigtran/osmo_ss7.h
index bbe425c..967912a 100644
--- a/include/osmocom/sigtran/osmo_ss7.h
+++ b/include/osmocom/sigtran/osmo_ss7.h
@@ -26,6 +26,14 @@ int osmo_ss7_pointcode_parse_mask_or_len(struct osmo_ss7_instance *inst, const c
const char *osmo_ss7_pointcode_print(struct osmo_ss7_instance *inst, uint32_t pc);
const char *osmo_ss7_pointcode_print2(struct osmo_ss7_instance *inst, uint32_t pc);
+/* All known point-code formats have a length of or below 24 bit.
+ * A point-code value exceeding that is used to indicate an unset PC. */
+#define OSMO_SS7_PC_INVALID 0xffffffff
+static inline bool osmo_ss7_pc_is_valid(uint32_t pc)
+{
+ return pc <= 0x00ffffff;
+}
+
/***********************************************************************
* SS7 Routing Tables
***********************************************************************/