[M] Change in osmo-bsc[master]: Clarify type and values of sccp.conn_id

pespin has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/31796 ) Change subject: Clarify type and values of sccp.conn_id ...................................................................... Clarify type and values of sccp.conn_id Currently, the conn_id is allocated in a range 0..0xffffff by bsc_sccp_inst_next_conn_id(), and -1 means it is unset. This means allocation expects "int" to be at least 32 bits integer, in order to fit 24 bits for 0..0xffffff plus the -1. Hence, let's define the variable as uint32_t, as already done in libosmo-sccp. Use last value 0xFFFFFFFF ((uint32_t)-1) and avoid playing with the value being unsigned sometimes and signed only for "unset" value. The value is actually already handled as unsigned (printed with %u) in most places. Change-Id: If019bcbc1e28929fe8d981fef9103835fc6ead2e --- M include/osmocom/bsc/gsm_data.h M src/osmo-bsc/bsc_sccp.c M src/osmo-bsc/bsc_subscr_conn_fsm.c M src/osmo-bsc/lb.c M src/osmo-bsc/osmo_bsc_sigtran.c 5 files changed, 42 insertions(+), 19 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/96/31796/1 diff --git a/include/osmocom/bsc/gsm_data.h b/include/osmocom/bsc/gsm_data.h index 533be93..1d6a266 100644 --- a/include/osmocom/bsc/gsm_data.h +++ b/include/osmocom/bsc/gsm_data.h @@ -329,7 +329,7 @@ struct bsc_msc_data *msc; /* Sigtran connection ID */ - int conn_id; + uint32_t conn_id; /* 0xFFFFFFFF (-1) unset, 0-0x00FFFFFF (24 bit) set */ enum subscr_sccp_state state; } sccp; @@ -379,7 +379,7 @@ /* Lb interface to the SMLC: BSSMAP-LE/SCCP connection associated with this subscriber */ struct { - int conn_id; + uint32_t conn_id; /* 0xFFFFFFFF unset, 0-0x00FFFFFF (24 bit) set */ enum subscr_sccp_state state; } lb; } lcs; @@ -1022,7 +1022,7 @@ enum gsm48_rr_cause bsc_gsm48_rr_cause_from_gsm0808_cause(enum gsm0808_cause c); enum gsm48_rr_cause bsc_gsm48_rr_cause_from_rsl_cause(uint8_t c); -int bsc_sccp_inst_next_conn_id(struct osmo_sccp_instance *sccp); +uint32_t bsc_sccp_inst_next_conn_id(struct osmo_sccp_instance *sccp); /* Interference Measurement Parameters */ struct gsm_interf_meas_params { diff --git a/src/osmo-bsc/bsc_sccp.c b/src/osmo-bsc/bsc_sccp.c index 0cd1dc9..67834a5 100644 --- a/src/osmo-bsc/bsc_sccp.c +++ b/src/osmo-bsc/bsc_sccp.c @@ -26,7 +26,7 @@ #include <osmocom/bsc/lb.h> /* We need an unused SCCP conn_id across all SCCP users. */ -int bsc_sccp_inst_next_conn_id(struct osmo_sccp_instance *sccp) +uint32_t bsc_sccp_inst_next_conn_id(struct osmo_sccp_instance *sccp) { static uint32_t next_id = 1; int i; @@ -34,11 +34,11 @@ /* This looks really suboptimal, but in most cases the static next_id should indicate exactly the next unused * conn_id, and we only iterate all conns once to make super sure that it is not already in use. */ - for (i = 0; i < 0xFFFFFF; i++) { + for (i = 0; i < 0x00FFFFFF; i++) { struct gsm_subscriber_connection *conn; uint32_t conn_id = next_id; bool conn_id_already_used = false; - next_id = (next_id + 1) & 0xffffff; + next_id = (next_id + 1) & 0x00FFFFFF; llist_for_each_entry(conn, &bsc_gsmnet->subscr_conns, entry) { if (conn->sccp.msc && conn->sccp.msc->a.sccp == sccp) { @@ -60,5 +60,5 @@ if (!conn_id_already_used) return conn_id; } - return -1; + return 0xFFFFFFFF; } diff --git a/src/osmo-bsc/bsc_subscr_conn_fsm.c b/src/osmo-bsc/bsc_subscr_conn_fsm.c index ebfbe82..14d1575 100644 --- a/src/osmo-bsc/bsc_subscr_conn_fsm.c +++ b/src/osmo-bsc/bsc_subscr_conn_fsm.c @@ -1226,7 +1226,7 @@ conn->network = net; INIT_LLIST_HEAD(&conn->dtap_queue); INIT_LLIST_HEAD(&conn->hodec2.penalty_timers); - conn->sccp.conn_id = -1; + conn->sccp.conn_id = 0xFFFFFFFF; /* mark as unset */ /* Default clear cause (on RR translates to GSM48_RR_CAUSE_ABNORMAL_UNSPEC) */ conn->clear_cause = GSM0808_CAUSE_EQUIPMENT_FAILURE; diff --git a/src/osmo-bsc/lb.c b/src/osmo-bsc/lb.c index 6f3cfac..ce28ebc 100644 --- a/src/osmo-bsc/lb.c +++ b/src/osmo-bsc/lb.c @@ -32,7 +32,7 @@ #include <osmocom/bsc/lcs_loc_req.h> #include <osmocom/bsc/bssmap_reset.h> -static struct gsm_subscriber_connection *get_bsc_conn_by_lb_conn_id(int conn_id) +static struct gsm_subscriber_connection *get_bsc_conn_by_lb_conn_id(uint32_t conn_id) { struct gsm_subscriber_connection *conn; @@ -229,7 +229,7 @@ static int lb_open_conn(struct gsm_subscriber_connection *conn, struct msgb *msg) { struct osmo_ss7_instance *ss7; - int conn_id; + uint32_t conn_id; int rc; OSMO_ASSERT(conn); @@ -242,14 +242,14 @@ } conn_id = bsc_sccp_inst_next_conn_id(bsc_gsmnet->smlc->sccp); - if (conn_id < 0) { + if (conn_id == 0xFFFFFFFF) { LOGPFSMSL(conn->fi, DLCS, LOGL_ERROR, "Unable to allocate SCCP Connection ID for BSSMAP-LE to SMLC\n"); return -ENOSPC; } conn->lcs.lb.conn_id = conn_id; ss7 = osmo_ss7_instance_find(bsc_gsmnet->smlc->cs7_instance); OSMO_ASSERT(ss7); - LOGPFSMSL(conn->fi, DLCS, LOGL_INFO, "Opening new SCCP connection (id=%i) to SMLC: %s\n", conn_id, + LOGPFSMSL(conn->fi, DLCS, LOGL_INFO, "Opening new SCCP connection (id=%u) to SMLC: %s\n", conn_id, osmo_sccp_addr_name(ss7, &bsc_gsmnet->smlc->smlc_addr)); rc = osmo_sccp_tx_conn_req_msg(bsc_gsmnet->smlc->sccp_user, conn_id, &bsc_gsmnet->smlc->bsc_addr, diff --git a/src/osmo-bsc/osmo_bsc_sigtran.c b/src/osmo-bsc/osmo_bsc_sigtran.c index 04c2e99..d765675 100644 --- a/src/osmo-bsc/osmo_bsc_sigtran.c +++ b/src/osmo-bsc/osmo_bsc_sigtran.c @@ -46,9 +46,9 @@ #define DEFAULT_ASP_REMOTE_IP "localhost" /* Helper function to Check if the given connection id is already assigned */ -static struct gsm_subscriber_connection *get_bsc_conn_by_conn_id(int conn_id) +static struct gsm_subscriber_connection *get_bsc_conn_by_conn_id(uint32_t conn_id) { - conn_id &= 0xFFFFFF; + conn_id &= 0x00FFFFFF; struct gsm_subscriber_connection *conn; llist_for_each_entry(conn, &bsc_gsmnet->subscr_conns, entry) { @@ -317,13 +317,14 @@ { struct osmo_ss7_instance *ss7; struct bsc_msc_data *msc; - int conn_id; + uint32_t conn_id; int rc; OSMO_ASSERT(conn); OSMO_ASSERT(msg); OSMO_ASSERT(conn->sccp.msc); - OSMO_ASSERT(conn->sccp.conn_id == -1); + /* make sure conn_id is so far unset: */ + OSMO_ASSERT(conn->sccp.conn_id == 0xFFFFFFFF); msc = conn->sccp.msc; @@ -333,14 +334,14 @@ } conn->sccp.conn_id = conn_id = bsc_sccp_inst_next_conn_id(conn->sccp.msc->a.sccp); - if (conn->sccp.conn_id < 0) { + if (conn->sccp.conn_id == 0xFFFFFFFF) { LOGP(DMSC, LOGL_ERROR, "Unable to allocate SCCP Connection ID\n"); return -1; } - LOGP(DMSC, LOGL_DEBUG, "Allocated new connection id: %d\n", conn->sccp.conn_id); + LOGP(DMSC, LOGL_DEBUG, "Allocated new connection id: %u\n", conn->sccp.conn_id); ss7 = osmo_ss7_instance_find(msc->a.cs7_instance); OSMO_ASSERT(ss7); - LOGP(DMSC, LOGL_INFO, "Opening new SCCP connection (id=%i) to MSC %d: %s\n", conn_id, + LOGP(DMSC, LOGL_INFO, "Opening new SCCP connection (id=%u) to MSC %d: %s\n", conn_id, msc->nr, osmo_sccp_addr_name(ss7, &msc->a.msc_addr)); rc = osmo_sccp_tx_conn_req_msg(msc->a.sccp_user, conn_id, &msc->a.bsc_addr, -- To view, visit https://gerrit.osmocom.org/c/osmo-bsc/+/31796 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bsc Gerrit-Branch: master Gerrit-Change-Id: If019bcbc1e28929fe8d981fef9103835fc6ead2e Gerrit-Change-Number: 31796 Gerrit-PatchSet: 1 Gerrit-Owner: pespin &lt;pespin(a)sysmocom.de&gt; Gerrit-MessageType: newchange