[L] Change in osmo-hnbgw[master]: sccp: allow separate cs7 for IuPS and IuCS

neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-hnbgw/+/32323 )

Change subject: sccp: allow separate cs7 for IuPS and IuCS ......................................................................

sccp: allow separate cs7 for IuPS and IuCS

Prepare for CN pooling; allow using separate SS7 instances for IuCS and IuPS.

New struct hnbgw_sccp_inst describes an SCCP instance, one per cs7. Limit struct hnbgw_cnlink to describing a CN peer, using any SCCP instance.

Chart sccp.dot shows the changes made.

Related: SYS#6422 Change-Id: Iea1824f1c586723d989c80a909bae16bd2866e08 --- M doc/charts/sccp.dot M include/osmocom/hnbgw/context_map.h M include/osmocom/hnbgw/hnbgw.h M include/osmocom/hnbgw/hnbgw_cn.h M src/osmo-hnbgw/context_map.c M src/osmo-hnbgw/context_map_sccp.c M src/osmo-hnbgw/hnbgw.c M src/osmo-hnbgw/hnbgw_cn.c M src/osmo-hnbgw/hnbgw_rua.c M src/osmo-hnbgw/hnbgw_vty.c 10 files changed, 525 insertions(+), 247 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-hnbgw refs/changes/23/32323/1

diff --git a/doc/charts/sccp.dot b/doc/charts/sccp.dot index 9c04c35..6b67a99 100644 --- a/doc/charts/sccp.dot +++ b/doc/charts/sccp.dot @@ -9,29 +9,50 @@ ss0 -> ss0ab

msc0a [label="2.2.2"] - sgsn0a [label="3.3.3"] - ss0ab -> msc0a,sgsn0a + ss0ab -> msc0a }

- iucs_addr [label=".iucs_addr -> 2.2.2"] - iups_addr [label=".iups_addr -> 3.3.3"] - msc0a -> iucs_addr [dir=back] - sgsn0a -> iups_addr [dir=back] - cnlink [label="hnbgw_cnlink (singleton)\n .osmo_sccp_instance\n .osmo_ss7_user SSN: RANAP"]; - ss0 -> cnlink [dir=back] + sccp0 [label="hnbgw_sccp_inst for '0'\n .osmo_sccp_instance\n .osmo_ss7_user SSN: RANAP"]; + ss0 -> sccp0 [dir=back] + + msc0 [label="hnbgw_cnlink for IuCS\n .sccp_addr -> 2.2.2"] + sccp0 -> msc0 [dir=back] + msc0a -> msc0 [dir=back]

cs0 [label="UE CS conn\n hnbgw_context_map"] cs1 [label="UE CS conn\n hnbgw_context_map"] + msc0 -> cs0,cs1 + + subgraph cluster_ss1 { + label="" + ss1 [label="cs7 instance 1\n local pc: 4.4.4"] + ss1ab [label="address book"] + ss1 -> ss1ab + + sgsn0a [label="3.3.3"] + ss1ab -> sgsn0a + } + + sccp1 [label="hnbgw_sccp_inst for '1'\n .osmo_sccp_instance\n .osmo_ss7_user SSN: RANAP"]; + ss1 -> sccp1 [dir=back] + + sgsn0 [label="hnbgw_cnlink for IuPS\n .sccp_addr -> 3.3.3"] + sccp1 -> sgsn0 [dir=back] + sgsn0a -> sgsn0 [dir=back] + ps0 [label="UE PS conn\n hnbgw_context_map"] ps1 [label="UE PS conn\n hnbgw_context_map"] - cnlink -> cs0,cs1,ps0,ps1 - iucs_addr -> cs0,cs1 [style=dotted,dir=none] - iups_addr -> ps0,ps1 [style=dotted,dir=none] + sgsn0 -> ps0,ps1 + + subgraph cluster_sccp_inst { + label="global sccp_instances (llist)" + sccp0 + sccp1 + }

subgraph cluster_hnbgw { label="global hnb_gw" - cnlink - iucs_addr - iups_addr + msc0 + sgsn0 } } diff --git a/include/osmocom/hnbgw/context_map.h b/include/osmocom/hnbgw/context_map.h index b64358a..4e2c02c 100644 --- a/include/osmocom/hnbgw/context_map.h +++ b/include/osmocom/hnbgw/context_map.h @@ -72,11 +72,14 @@

struct hnbgw_context_map { /* entry in the per-CN list of mappings */ - struct llist_head cn_list; + struct llist_head hnbgw_cnlink_entry; /* entry in the per-HNB list of mappings. If hnb_ctx == NULL, then this llist entry has been llist_del()eted and * must not be used. */ struct llist_head hnb_list;

+ /* entry in the per-SCCP-conn-id hashtable */ + struct hlist_node hnbgw_sccp_inst_entry; + /* Backpointer to global hnb_gw. */ struct hnb_gw *gw;

@@ -89,7 +92,7 @@ struct osmo_fsm_inst *rua_fi;

/* Pointer to CN, to transceive SCCP. */ - struct hnbgw_cnlink *cn_link; + struct hnbgw_cnlink *cnlink; /* SCCP User SAP connection ID used in SCCP messages to/from the cn_link. */ uint32_t scu_conn_id; /* FSM handling the SCCP state for scu_conn_id. */ @@ -134,10 +137,8 @@ enum hnbgw_context_map_state map_rua_get_state(struct hnbgw_context_map *map); enum hnbgw_context_map_state map_sccp_get_state(struct hnbgw_context_map *map);

-struct hnbgw_context_map * -context_map_alloc_by_hnb(struct hnb_context *hnb, uint32_t rua_ctx_id, - bool is_ps, - struct hnbgw_cnlink *cn_if_new); +struct hnbgw_context_map *context_map_find_or_create_by_rua_ctx_id(struct hnb_context *hnb, uint32_t rua_ctx_id, + bool is_ps);

void map_rua_fsm_alloc(struct hnbgw_context_map *map); void map_sccp_fsm_alloc(struct hnbgw_context_map *map); diff --git a/include/osmocom/hnbgw/hnbgw.h b/include/osmocom/hnbgw/hnbgw.h index 1bf140a..e6e53c3 100644 --- a/include/osmocom/hnbgw/hnbgw.h +++ b/include/osmocom/hnbgw/hnbgw.h @@ -2,11 +2,14 @@

#include <osmocom/core/select.h> #include <osmocom/core/linuxlist.h> +#include <osmocom/core/hashtable.h> #include <osmocom/core/write_queue.h> #include <osmocom/core/timer.h> #include <osmocom/sigtran/sccp_sap.h> #include <osmocom/sigtran/osmo_ss7.h> #include <osmocom/ctrl/control_if.h> +#include <osmocom/ranap/RANAP_CN-DomainIndicator.h> + #define DEBUG #include <osmocom/core/logging.h>

@@ -26,6 +29,9 @@ #define LOGHNB(HNB_CTX, ss, lvl, fmt, args ...) \ LOGP(ss, lvl, "(%s) " fmt, hnb_context_name(HNB_CTX), ## args)

+#define DOMAIN_CS RANAP_CN_DomainIndicator_cs_domain +#define DOMAIN_PS RANAP_CN_DomainIndicator_ps_domain + enum hnb_ctrl_node { CTRL_NODE_HNB = _LAST_CTRL_NODE, _LAST_CTRL_NODE_HNB @@ -37,6 +43,10 @@ #define HNBGW_IUCS_REMOTE_IP_DEFAULT "127.0.0.1" #define HNBGW_IUPS_REMOTE_IP_DEFAULT "127.0.0.1"

+#define DEFAULT_PC_HNBGW ((23 << 3) + 5) +#define DEFAULT_PC_MSC ((23 << 3) + 1) +#define DEFAULT_PC_SGSN ((23 << 3) + 4) + /* 25.467 Section 7.1 */ #define IUH_DEFAULT_SCTP_PORT 29169 #define RNA_DEFAULT_SCTP_PORT 25471 @@ -60,6 +70,25 @@

struct hnb_gw;

+struct hnbgw_sccp_inst { + struct llist_head entry; + + struct hnb_gw *gw; + + char *name; + + /* There is one osmo_sccp_instance per cs7_instance. + * Below osmo_sccp_instance is running on this cs7 instance: */ + uint32_t cs7_instance; + struct osmo_sccp_instance *sccp; + /* for SSN = RANAP */ + struct osmo_sccp_user *sccp_user; + + uint32_t next_conn_id; + + DECLARE_HASHTABLE(hnbgw_context_map_by_conn_id, 6); +}; + enum hnbgw_cnlink_state { /* we have just been initialized or were disconnected */ CNLINK_S_NULL, @@ -73,21 +102,63 @@ CNLINK_S_EST_ACTIVE, };

+/* A CN peer, like MSC or SGSN. */ struct hnbgw_cnlink { - struct llist_head list; - enum hnbgw_cnlink_state state; + /* backpointer to global hnb_gw */ struct hnb_gw *gw; + + /* To print in logging/VTY */ + char *name; + + /* IuCS or IuPS? */ + RANAP_CN_DomainIndicator_t domain; + + /* FUTURE: In principle, there may be different local point-codes for separate CN links on the same SCCP + * instance. So far, each hnbgw_cnlink->local_addr just contains SSN = RANAP, so that the cs7 instance fills in + * its primary point code. */ + struct osmo_sccp_addr local_addr; + + /* cs7 address book entry to indicate both the remote point-code of the peer, as well as which cs7 instance to + * use. */ + const char *remote_addr_name; + + /* Copy of the address pointed at by remote_addr_name. */ + struct osmo_sccp_addr remote_addr; + + /* The SCCP instance for the cs7 instance indicated by remote_addr_name. (Multiple hnbgw_cnlinks may use the + * same hnbgw_sccp_inst -- there is exactly one hnbgw_sccp_inst per configured cs7 instance.) */ + struct hnbgw_sccp_inst *hnbgw_sccp_inst; + + enum hnbgw_cnlink_state state; /* timer for re-transmitting the RANAP Reset */ struct osmo_timer_list T_RafC; - /* reference to the SCCP User SAP by which we communicate */ - struct osmo_sccp_instance *sccp; - struct osmo_sccp_user *sccp_user; - uint32_t next_conn_id;

/* linked list of hnbgw_context_map */ struct llist_head map_list; };

+#define LOG_CNLINK(CNLINK, SUBSYS, LEVEL, FMT, ARGS...) \ + LOGP(SUBSYS, LEVEL, "(%s) " FMT, (CNLINK) ? (CNLINK)->name : "null", ##ARGS) + +static inline bool cnlink_is_cs(const struct hnbgw_cnlink *cnlink) +{ + return cnlink && cnlink->domain == DOMAIN_CS; +} + +static inline bool cnlink_is_ps(const struct hnbgw_cnlink *cnlink) +{ + return cnlink && cnlink->domain == DOMAIN_PS; +} + +static inline struct osmo_sccp_instance *cnlink_sccp(const struct hnbgw_cnlink *cnlink) +{ + if (!cnlink) + return NULL; + if (!cnlink->hnbgw_sccp_inst) + return NULL; + return cnlink->hnbgw_sccp_inst->sccp; +} + /* The lifecycle of the hnb_context object is the same as its conn */ struct hnb_context { /*! Entry in HNB-global list of HNB */ @@ -157,11 +228,10 @@ struct ctrl_handle *ctrl; /* currently active CN links for CS and PS */ struct { - struct osmo_sccp_instance *client; - struct hnbgw_cnlink *cnlink; - struct osmo_sccp_addr local_addr; - struct osmo_sccp_addr iucs_remote_addr; - struct osmo_sccp_addr iups_remote_addr; + /* List of hnbgw_sccp_inst */ + struct llist_head instances; + struct hnbgw_cnlink *cnlink_iucs; + struct hnbgw_cnlink *cnlink_iups; } sccp; /* MGW pool, also includes the single MGCP client as fallback if no * pool is configured. */ @@ -205,3 +275,5 @@ }

struct msgb *hnbgw_ranap_msg_alloc(const char *name); + +struct hnbgw_cnlink *hnbgw_cnlink_select(struct hnb_gw *gw, bool is_ps); diff --git a/include/osmocom/hnbgw/hnbgw_cn.h b/include/osmocom/hnbgw/hnbgw_cn.h index 0df2716..036fdc7 100644 --- a/include/osmocom/hnbgw/hnbgw_cn.h +++ b/include/osmocom/hnbgw/hnbgw_cn.h @@ -2,6 +2,10 @@

#include <osmocom/hnbgw/hnbgw.h>

-int hnbgw_cnlink_init(struct hnb_gw *gw, const char *stp_host, uint16_t stp_port, const char *local_ip); +struct hnbgw_cnlink *hnbgw_cnlink_alloc(struct hnb_gw *gw, const char *remote_addr_name, + RANAP_CN_DomainIndicator_t domain);

const struct osmo_sccp_addr *hnbgw_cn_get_remote_addr(struct hnb_gw *gw, bool is_ps); + +struct hnbgw_cnlink *hnbgw_cnlink_find_by_addr(const struct hnbgw_sccp_inst *hsi, + const struct osmo_sccp_addr *remote_addr); diff --git a/src/osmo-hnbgw/context_map.c b/src/osmo-hnbgw/context_map.c index 31f635d..06272d4 100644 --- a/src/osmo-hnbgw/context_map.c +++ b/src/osmo-hnbgw/context_map.c @@ -53,11 +53,11 @@ }

/* is a given SCCP USER SAP Connection ID in use for a given CN link? */ -static int cn_id_in_use(struct hnbgw_cnlink *cn, uint32_t id) +static int sccp_id_in_use(struct hnbgw_sccp_inst *hsi, uint32_t id) { struct hnbgw_context_map *map;

- llist_for_each_entry(map, &cn->map_list, cn_list) { + hash_for_each_possible(hsi->hnbgw_context_map_by_conn_id, map, hnbgw_sccp_inst_entry, id) { if (map->scu_conn_id == id) return 1; } @@ -65,11 +65,14 @@ }

/* try to allocate a new SCCP User SAP Connection ID */ -static int alloc_cn_conn_id(struct hnbgw_cnlink *cn, uint32_t *id_out) +static int sccp_alloc_conn_id(struct hnbgw_sccp_inst *hsi, uint32_t *id_out) { uint32_t i; uint32_t id;

+ if (!hsi) + return -ENOENT; + /* SUA: RFC3868 sec 3.10.4: * The source reference number is a 4 octet long integer. * This is allocated by the source SUA instance. @@ -82,28 +85,28 @@ */

for (i = 0; i < 0x00ffffff; i++) { - id = cn->next_conn_id++; - if (cn->next_conn_id == 0x00ffffff) - cn->next_conn_id = 0; - if (!cn_id_in_use(cn, id)) { + id = hsi->next_conn_id++; + if (hsi->next_conn_id == 0x00ffffff) + hsi->next_conn_id = 0; + if (!sccp_id_in_use(hsi, id)) { *id_out = id; - return 1; + return 0; } } - return -1; + return -EADDRNOTAVAIL; }

/* Map from a HNB + ContextID to the SCCP-side Connection ID */ -struct hnbgw_context_map * -context_map_alloc_by_hnb(struct hnb_context *hnb, uint32_t rua_ctx_id, - bool is_ps, - struct hnbgw_cnlink *cn_if_new) +struct hnbgw_context_map *context_map_find_or_create_by_rua_ctx_id(struct hnb_context *hnb, uint32_t rua_ctx_id, + bool is_ps) { struct hnbgw_context_map *map; uint32_t new_scu_conn_id; + struct hnbgw_cnlink *cnlink; + struct hnbgw_sccp_inst *hsi;

llist_for_each_entry(map, &hnb->map_list, hnb_list) { - if (map->cn_link != cn_if_new) + if (map->is_ps != is_ps) continue;

/* Matching on RUA context id -- only match for RUA context that has not been disconnected yet. If an @@ -112,24 +115,39 @@ if (!map_rua_is_active(map)) continue;

- if (map->rua_ctx_id == rua_ctx_id - && map->is_ps == is_ps) { - return map; - } + if (map->rua_ctx_id != rua_ctx_id) + continue; + + /* Already exists */ + return map; }

- if (alloc_cn_conn_id(cn_if_new, &new_scu_conn_id) < 0) { - LOGHNB(hnb, DMAIN, LOGL_ERROR, "Unable to allocate CN connection ID\n"); + /* Does not exist yet, create a new hnbgw_context_map. */ + + /* From the RANAP/RUA input, determine which cnlink to use */ + cnlink = hnbgw_cnlink_select(hnb->gw, is_ps); + if (!cnlink) { + LOGHNB(hnb, DMAIN, LOGL_ERROR, "Failed to select CN link\n"); return NULL; }

- LOGHNB(hnb, DMAIN, LOGL_INFO, "Creating new Mapping RUA CTX %p/%u <-> SCU Conn ID %p/%u\n", - hnb, rua_ctx_id, cn_if_new, new_scu_conn_id); + /* Allocate new SCCP conn id on the SCCP instance the cnlink is on. */ + hsi = cnlink->hnbgw_sccp_inst; + if (!hsi) { + LOGHNB(hnb, DMAIN, LOGL_ERROR, "Cannot allocate context map: No SCCP instance for CN link %s\n", + cnlink->name); + return NULL; + } + + if (sccp_alloc_conn_id(hsi, &new_scu_conn_id)) { + LOGHNB(hnb, DMAIN, LOGL_ERROR, "Unable to allocate SCCP conn ID on %s\n", hsi->name); + return NULL; + }

/* allocate a new map entry. */ map = talloc_zero(hnb, struct hnbgw_context_map); map->gw = hnb->gw; - map->cn_link = cn_if_new; + map->cnlink = cnlink; map->hnb_ctx = hnb; map->rua_ctx_id = rua_ctx_id; map->is_ps = is_ps; @@ -140,9 +158,12 @@ map_rua_fsm_alloc(map); map_sccp_fsm_alloc(map);

- /* put it into both lists */ llist_add_tail(&map->hnb_list, &hnb->map_list); - llist_add_tail(&map->cn_list, &cn_if_new->map_list); + llist_add_tail(&map->hnbgw_cnlink_entry, &cnlink->map_list); + hash_add(hsi->hnbgw_context_map_by_conn_id, &map->hnbgw_sccp_inst_entry, new_scu_conn_id); + + LOG_MAP(map, DMAIN, LOGL_INFO, "Creating new Mapping RUA CTX %u <-> SCU Conn ID %s/%u\n", + rua_ctx_id, hsi->name, new_scu_conn_id);

return map; } @@ -180,7 +201,9 @@ { struct hnbgw_context_map *map;

- llist_for_each_entry(map, &cn->map_list, cn_list) { + /* TODO: use hashlist cnlink->hnbgw_sccp_inst->hnbgw_context_map_by_conn_id */ + + llist_for_each_entry(map, &cn->map_list, hnbgw_cnlink_entry) { /* Matching on SCCP conn id -- only match for SCCP conn that has not been disconnected yet. If an * inactive context map for an scu_conn_id is still around, we may have two entries for the same * scu_conn_id around at the same time. That should only stay until its RUA side is done releasing. */ @@ -240,8 +263,10 @@ hnbgw_gtpmap_release(map); #endif

- if (map->cn_link) - llist_del(&map->cn_list); + if (map->cnlink) { + llist_del(&map->hnbgw_cnlink_entry); + hash_del(&map->hnbgw_sccp_inst_entry); + } if (map->hnb_ctx) llist_del(&map->hnb_list);

diff --git a/src/osmo-hnbgw/context_map_sccp.c b/src/osmo-hnbgw/context_map_sccp.c index 65939f3..eab0029 100644 --- a/src/osmo-hnbgw/context_map_sccp.c +++ b/src/osmo-hnbgw/context_map_sccp.c @@ -123,6 +123,11 @@ struct osmo_scu_prim *prim; int rc;

+ if (!map->cnlink || !map->cnlink->hnbgw_sccp_inst) { + LOGPFSML(fi, LOGL_ERROR, "Failed to send SCCP Connection Request: no CN link\n"); + return -1; + } + if (!ranap_msg) { /* prepare a msgb to send an empty N-Connect prim (but this should never happen in practice) */ ranap_msg = hnbgw_ranap_msg_alloc("SCCP-CR-empty"); @@ -131,13 +136,13 @@ prim = (struct osmo_scu_prim *)msgb_push(ranap_msg, sizeof(*prim)); osmo_prim_init(&prim->oph, SCCP_SAP_USER, OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_REQUEST, ranap_msg); prim->u.connect.called_addr = *hnbgw_cn_get_remote_addr(map->gw, map->is_ps); - prim->u.connect.calling_addr = map->gw->sccp.local_addr; + prim->u.connect.calling_addr = map->cnlink->local_addr; prim->u.connect.sccp_class = 2; prim->u.connect.conn_id = map->scu_conn_id;

- rc = osmo_sccp_user_sap_down_nofree(map->cn_link->sccp_user, &prim->oph); + rc = osmo_sccp_user_sap_down_nofree(map->cnlink->hnbgw_sccp_inst->sccp_user, &prim->oph); if (rc) - LOGPFSML(fi, LOGL_ERROR, "Failed to forward SCCP Connectoin Request to CN\n"); + LOGPFSML(fi, LOGL_ERROR, "Failed to send SCCP Connection Request to CN\n"); return rc; }

@@ -150,20 +155,31 @@ if (!msg_has_l2_data(ranap_msg)) return 0;

+ if (!map->cnlink || !map->cnlink->hnbgw_sccp_inst) { + LOGPFSML(fi, LOGL_ERROR, "Failed to send SCCP Data Form 1: no CN link\n"); + return -1; + } + prim = (struct osmo_scu_prim *)msgb_push(ranap_msg, sizeof(*prim)); osmo_prim_init(&prim->oph, SCCP_SAP_USER, OSMO_SCU_PRIM_N_DATA, PRIM_OP_REQUEST, ranap_msg); prim->u.data.conn_id = map->scu_conn_id;

- rc = osmo_sccp_user_sap_down_nofree(map->cn_link->sccp_user, &prim->oph); + rc = osmo_sccp_user_sap_down_nofree(map->cnlink->hnbgw_sccp_inst->sccp_user, &prim->oph); if (rc) - LOGPFSML(fi, LOGL_ERROR, "Failed to forward SCCP Data Form 1 to CN\n"); + LOGPFSML(fi, LOGL_ERROR, "Failed to send SCCP Data Form 1 to CN\n"); return rc; }

static int tx_sccp_rlsd(struct osmo_fsm_inst *fi) { struct hnbgw_context_map *map = fi->priv; - return osmo_sccp_tx_disconn(map->cn_link->sccp_user, map->scu_conn_id, NULL, 0); + + if (!map->cnlink || !map->cnlink->hnbgw_sccp_inst) { + LOGPFSML(fi, LOGL_ERROR, "Failed to send SCCP RLSD: no CN link\n"); + return -1; + } + + return osmo_sccp_tx_disconn(map->cnlink->hnbgw_sccp_inst->sccp_user, map->scu_conn_id, NULL, 0); }

static int destruct_ranap_ran_rx_co_ies(ranap_message *ranap_message_p) @@ -455,7 +471,7 @@ /* send SCCP RLSD. libosmo-sigtran/sccp_scoc.c will do the SCCP connection cleanup. * (It will repeatedly send SCCP RLSD until the peer responded with SCCP RLC, or until the * sccp_connection->t_int timer expires, and the sccp_connection is freed.) */ - if (map->cn_link && map->cn_link->sccp_user) + if (map->cnlink) tx_sccp_rlsd(fi); map_sccp_fsm_state_chg(MAP_SCCP_ST_DISCONNECTED); return 0; diff --git a/src/osmo-hnbgw/hnbgw.c b/src/osmo-hnbgw/hnbgw.c index bd45dda..e4a2302 100644 --- a/src/osmo-hnbgw/hnbgw.c +++ b/src/osmo-hnbgw/hnbgw.c @@ -97,6 +97,7 @@ gw->next_ue_ctx_id = 23; INIT_LLIST_HEAD(&gw->hnb_list); INIT_LLIST_HEAD(&gw->ue_list); + INIT_LLIST_HEAD(&gw->sccp.instances);

gw->mgw_pool = mgcp_client_pool_alloc(gw); gw->config.mgcp_client = talloc_zero(tall_hnb_ctx, struct mgcp_client_conf); @@ -806,11 +807,13 @@

ranap_set_log_area(DRANAP);

- rc = hnbgw_cnlink_init(g_hnb_gw, "localhost", M3UA_PORT, "localhost"); - if (rc < 0) { + if (!hnbgw_cnlink_alloc(g_hnb_gw, g_hnb_gw->config.iucs_remote_addr_name, DOMAIN_CS) + || !hnbgw_cnlink_alloc(g_hnb_gw, g_hnb_gw->config.iups_remote_addr_name, DOMAIN_PS)) { LOGP(DMAIN, LOGL_ERROR, "Failed to initialize SCCP link to CN\n"); exit(1); } + OSMO_ASSERT(g_hnb_gw->sccp.cnlink_iucs); + OSMO_ASSERT(g_hnb_gw->sccp.cnlink_iups);

LOGP(DHNBAP, LOGL_NOTICE, "Using RNC-Id %u\n", g_hnb_gw->config.rnc_id);

@@ -871,3 +874,12 @@ ranap_msg->l2h = ranap_msg->data; return ranap_msg; } + +struct hnbgw_cnlink *hnbgw_cnlink_select(struct hnb_gw *gw, bool is_ps) +{ + /* FUTURE: soon we will pick one of many configurable CN peers from a pool. There will be more input arguments + * (MI, or TMSI, or NRI decoded from RANAP) and this function will do round robin for new subscribers. */ + if (is_ps) + return gw->sccp.cnlink_iups; + return gw->sccp.cnlink_iucs; +} diff --git a/src/osmo-hnbgw/hnbgw_cn.c b/src/osmo-hnbgw/hnbgw_cn.c index e2dccf9..e358c11 100644 --- a/src/osmo-hnbgw/hnbgw_cn.c +++ b/src/osmo-hnbgw/hnbgw_cn.c @@ -33,6 +33,7 @@

#include <osmocom/hnbgw/hnbgw.h> #include <osmocom/hnbgw/hnbgw_rua.h> +#include <osmocom/hnbgw/hnbgw_cn.h> #include <osmocom/ranap/ranap_ies_defs.h> #include <osmocom/ranap/ranap_msg_factory.h> #include <osmocom/hnbgw/context_map.h> @@ -43,8 +44,7 @@

void hnbgw_cnlink_change_state(struct hnbgw_cnlink *cnlink, enum hnbgw_cnlink_state state);

-static int transmit_rst(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain, - struct osmo_sccp_addr *remote_addr) +static int transmit_rst(struct hnbgw_cnlink *cnlink) { struct msgb *msg; RANAP_Cause_t cause = { @@ -52,43 +52,57 @@ .choice. transmissionNetwork = RANAP_CauseTransmissionNetwork_signalling_transport_resource_failure, };

- LOGP(DRANAP, LOGL_NOTICE, "Tx RESET to %s %s\n", - domain == RANAP_CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", - osmo_sccp_inst_addr_name(gw->sccp.cnlink->sccp, remote_addr)); + if (!cnlink) + return -1;

- msg = ranap_new_msg_reset(domain, &cause); + if (!cnlink->hnbgw_sccp_inst) { + LOG_CNLINK(cnlink, DRANAP, LOGL_ERROR, "cannot send RANAP RESET: no CN link\n"); + return -1; + }

- return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user, - &gw->sccp.local_addr, - remote_addr, + LOG_CNLINK(cnlink, DRANAP, LOGL_NOTICE, "Tx RANAP RESET to %s %s\n", + cnlink_is_cs(cnlink) ? "IuCS" : "IuPS", + osmo_sccp_inst_addr_name(cnlink->hnbgw_sccp_inst->sccp, &cnlink->remote_addr)); + + msg = ranap_new_msg_reset(cnlink->domain, &cause); + + return osmo_sccp_tx_unitdata_msg(cnlink->hnbgw_sccp_inst->sccp_user, + &cnlink->local_addr, + &cnlink->remote_addr, msg); }

-static int transmit_reset_ack(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain, - const struct osmo_sccp_addr *remote_addr) +static int transmit_reset_ack(struct hnbgw_cnlink *cnlink) { struct msgb *msg; + struct osmo_sccp_instance *sccp = cnlink_sccp(cnlink);

- LOGP(DRANAP, LOGL_NOTICE, "Tx RESET ACK to %s %s\n", - domain == RANAP_CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", - osmo_sccp_inst_addr_name(gw->sccp.cnlink->sccp, remote_addr)); + if (!sccp) { + LOG_CNLINK(cnlink, DRANAP, LOGL_ERROR, "cannot send RANAP RESET ACK: no CN link\n"); + return -1; + }

- msg = ranap_new_msg_reset_ack(domain, NULL); + LOG_CNLINK(cnlink, DRANAP, LOGL_NOTICE, "Tx RANAP RESET ACK %s %s --> %s\n", + cnlink_is_cs(cnlink) ? "IuCS" : "IuPS", + osmo_sccp_inst_addr_to_str_c(OTC_SELECT, cnlink->hnbgw_sccp_inst->sccp, &cnlink->local_addr), + osmo_sccp_inst_addr_to_str_c(OTC_SELECT, cnlink->hnbgw_sccp_inst->sccp, &cnlink->remote_addr));

- return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user, - &gw->sccp.local_addr, - remote_addr, + msg = ranap_new_msg_reset_ack(cnlink->domain, NULL); + + return osmo_sccp_tx_unitdata_msg(cnlink->hnbgw_sccp_inst->sccp_user, + &cnlink->local_addr, + &cnlink->remote_addr, msg); }

/* Timer callback once T_RafC expires */ static void cnlink_trafc_cb(void *data) { - struct hnb_gw *gw = data; + struct hnbgw_cnlink *cnlink = data;

- transmit_rst(gw, RANAP_CN_DomainIndicator_cs_domain, &gw->sccp.iucs_remote_addr); - transmit_rst(gw, RANAP_CN_DomainIndicator_ps_domain, &gw->sccp.iups_remote_addr); - hnbgw_cnlink_change_state(gw->sccp.cnlink, CNLINK_S_EST_RST_TX_WAIT_ACK); + /* FUTURE: there will be a list of cnlinks and we will do llist_for_each_entry(gw->sccp.cnlinks) here. */ + transmit_rst(cnlink); + hnbgw_cnlink_change_state(cnlink, CNLINK_S_EST_RST_TX_WAIT_ACK); /* The spec states that we should abandon after a configurable * number of times. We decide to simply continue trying */ } @@ -101,7 +115,7 @@ case CNLINK_S_EST_PEND: break; case CNLINK_S_EST_CONF: - cnlink_trafc_cb(cnlink->gw); + cnlink_trafc_cb(cnlink); break; case CNLINK_S_EST_RST_TX_WAIT_ACK: osmo_timer_schedule(&cnlink->T_RafC, 5, 0); @@ -128,16 +142,16 @@ domain = ies.cN_DomainIndicator; ranap_free_reseties(&ies);

- LOGP(DRANAP, LOGL_NOTICE, "Rx RESET from %s %s, returning ACK\n", - domain == RANAP_CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", - osmo_sccp_inst_addr_name(cnlink->sccp, &unitdata->calling_addr)); + LOG_CNLINK(cnlink, DRANAP, LOGL_NOTICE, "Rx RESET from %s %s, returning ACK\n", + domain == DOMAIN_CS ? "IuCS" : "IuPS", + osmo_sccp_inst_addr_name(cnlink_sccp(cnlink), &unitdata->calling_addr));

/* FIXME: actually reset connections, if any */

- if (transmit_reset_ack(cnlink->gw, domain, &unitdata->calling_addr)) + if (transmit_reset_ack(cnlink)) LOGP(DRANAP, LOGL_ERROR, "Error: cannot send RESET ACK to %s %s\n", - domain == RANAP_CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", - osmo_sccp_inst_addr_name(cnlink->sccp, &unitdata->calling_addr)); + domain == DOMAIN_CS ? "IuCS" : "IuPS", + osmo_sccp_inst_addr_name(cnlink_sccp(cnlink), &unitdata->calling_addr));

return rc; } @@ -280,102 +294,97 @@ return rc; }

-static bool pc_and_ssn_match(const struct osmo_sccp_addr *a, const struct osmo_sccp_addr *b) +static struct hnbgw_cnlink *cnlink_from_addr(struct hnbgw_sccp_inst *hsi, const struct osmo_sccp_addr *calling_addr, + const struct osmo_prim_hdr *oph) { - return (a == b) - || ((a->pc == b->pc) - && (a->ssn == b->ssn)); + struct hnbgw_cnlink *cnlink = NULL; + cnlink = hnbgw_cnlink_find_by_addr(hsi, calling_addr); + if (!cnlink) { + LOGP(DRANAP, LOGL_ERROR, "Rx from unknown SCCP peer: %s: %s\n", + osmo_sccp_inst_addr_name(hsi->sccp, calling_addr), + osmo_scu_prim_hdr_name_c(OTC_SELECT, oph)); + return NULL; + } + return cnlink; }

-static int classify_cn_remote_addr(const struct hnb_gw *gw, - const struct osmo_sccp_addr *cn_remote_addr, - bool *is_ps) +static struct hnbgw_context_map *map_from_conn_id(struct hnbgw_sccp_inst *hsi, uint32_t conn_id, + const struct osmo_prim_hdr *oph) { - if (pc_and_ssn_match(cn_remote_addr, &gw->sccp.iucs_remote_addr)) { - if (is_ps) - *is_ps = false; - return 0; - } - if (pc_and_ssn_match(cn_remote_addr, &gw->sccp.iups_remote_addr)) { - if (is_ps) - *is_ps = true; - return 0; - } - LOGP(DMAIN, LOGL_ERROR, "Unexpected remote address, matches neither CS nor PS address: %s\n", - osmo_sccp_addr_dump(cn_remote_addr)); - return -1; + struct hnbgw_context_map *map; + hash_for_each_possible(hsi->hnbgw_context_map_by_conn_id, map, hnbgw_sccp_inst_entry, conn_id) + return map; + LOGP(DRANAP, LOGL_ERROR, "Rx for unknown SCCP connection ID: %u: %s\n", + conn_id, osmo_scu_prim_hdr_name_c(OTC_SELECT, oph)); + return NULL; }

-static int handle_cn_unitdata(struct hnbgw_cnlink *cnlink, +static int handle_cn_unitdata(struct hnbgw_sccp_inst *hsi, const struct osmo_scu_unitdata_param *param, struct osmo_prim_hdr *oph) { + struct hnbgw_cnlink *cnlink = cnlink_from_addr(hsi, &param->calling_addr, oph); + if (!cnlink) + return -ENOENT; + if (param->called_addr.ssn != OSMO_SCCP_SSN_RANAP) { LOGP(DMAIN, LOGL_NOTICE, "N-UNITDATA.ind for unknown SSN %u\n", param->called_addr.ssn); return -1; }

- if (classify_cn_remote_addr(cnlink->gw, &param->calling_addr, NULL) < 0) - return -1; - return handle_cn_ranap(cnlink, param, msgb_l2(oph->msg), msgb_l2len(oph->msg)); }

-static int handle_cn_conn_conf(struct hnbgw_cnlink *cnlink, +static int handle_cn_conn_conf(struct hnbgw_sccp_inst *hsi, const struct osmo_scu_connect_param *param, struct osmo_prim_hdr *oph) { - struct osmo_ss7_instance *ss7 = osmo_sccp_get_ss7(cnlink->gw->sccp.client); struct hnbgw_context_map *map; + struct osmo_sccp_instance *sccp; + + map = map_from_conn_id(hsi, param->conn_id, oph); + if (!map || !map->cnlink) + return -ENOENT; + + sccp = cnlink_sccp(map->cnlink);

LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() conn_id=%d, addrs: called=%s calling=%s responding=%s\n", param->conn_id, - osmo_sccp_addr_to_str_c(OTC_SELECT, ss7, &param->called_addr), - osmo_sccp_addr_to_str_c(OTC_SELECT, ss7, &param->calling_addr), - osmo_sccp_addr_to_str_c(OTC_SELECT, ss7, &param->responding_addr)); - - map = context_map_by_cn(cnlink, param->conn_id); - if (!map) { - /* We have no such SCCP connection. Ignore. */ - return 0; - } + osmo_sccp_inst_addr_to_str_c(OTC_SELECT, sccp, &param->called_addr), + osmo_sccp_inst_addr_to_str_c(OTC_SELECT, sccp, &param->calling_addr), + osmo_sccp_inst_addr_to_str_c(OTC_SELECT, sccp, &param->responding_addr));

map_sccp_dispatch(map, MAP_SCCP_EV_RX_CONNECTION_CONFIRM, oph->msg); return 0; }

-static int handle_cn_data_ind(struct hnbgw_cnlink *cnlink, +static int handle_cn_data_ind(struct hnbgw_sccp_inst *hsi, const struct osmo_scu_data_param *param, struct osmo_prim_hdr *oph) { struct hnbgw_context_map *map;

- map = context_map_by_cn(cnlink, param->conn_id); - if (!map) { - /* We have no such SCCP connection. Ignore. */ - return 0; - } + map = map_from_conn_id(hsi, param->conn_id, oph); + if (!map || !map->cnlink) + return -ENOENT;

return map_sccp_dispatch(map, MAP_SCCP_EV_RX_DATA_INDICATION, oph->msg); }

-static int handle_cn_disc_ind(struct hnbgw_cnlink *cnlink, +static int handle_cn_disc_ind(struct hnbgw_sccp_inst *hsi, const struct osmo_scu_disconn_param *param, struct osmo_prim_hdr *oph) { struct hnbgw_context_map *map;

- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() conn_id=%d originator=%d\n", - param->conn_id, param->originator); - LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() responding_addr=%s\n", - inet_ntoa(param->responding_addr.ip.v4)); + map = map_from_conn_id(hsi, param->conn_id, oph); + if (!map || !map->cnlink) + return -ENOENT;

- map = context_map_by_cn(cnlink, param->conn_id); - if (!map) { - /* We have no connection. Ignore. */ - return 0; - } + LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() conn_id=%u responding_addr=%s\n", + param->conn_id, + osmo_sccp_inst_addr_to_str_c(OTC_SELECT, cnlink_sccp(map->cnlink), &param->responding_addr));

return map_sccp_dispatch(map, MAP_SCCP_EV_RX_RELEASED, oph->msg); } @@ -384,7 +393,7 @@ static int sccp_sap_up(struct osmo_prim_hdr *oph, void *ctx) { struct osmo_sccp_user *scu = ctx; - struct hnbgw_cnlink *cnlink; + struct hnbgw_sccp_inst *hsi; struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph; int rc = 0;

@@ -397,10 +406,10 @@ return -1; }

- cnlink = osmo_sccp_user_get_priv(scu); - if (!cnlink) { + hsi = osmo_sccp_user_get_priv(scu); + if (!hsi) { LOGP(DMAIN, LOGL_ERROR, - "sccp_sap_up(): NULL hnbgw_cnlink, cannot send prim (sap %u prim %u op %d)\n", + "sccp_sap_up(): NULL hnbgw_sccp_inst, cannot send prim (sap %u prim %u op %d)\n", oph->sap, oph->primitive, oph->operation); return -1; } @@ -409,16 +418,16 @@

switch (OSMO_PRIM_HDR(oph)) { case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION): - rc = handle_cn_unitdata(cnlink, &prim->u.unitdata, oph); + rc = handle_cn_unitdata(hsi, &prim->u.unitdata, oph); break; case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM): - rc = handle_cn_conn_conf(cnlink, &prim->u.connect, oph); + rc = handle_cn_conn_conf(hsi, &prim->u.connect, oph); break; case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION): - rc = handle_cn_data_ind(cnlink, &prim->u.data, oph); + rc = handle_cn_data_ind(hsi, &prim->u.data, oph); break; case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION): - rc = handle_cn_disc_ind(cnlink, &prim->u.disconnect, oph); + rc = handle_cn_disc_ind(hsi, &prim->u.disconnect, oph); break; case OSMO_PRIM(OSMO_SCU_PRIM_N_PCSTATE, PRIM_OP_INDICATION): LOGP(DMAIN, LOGL_DEBUG, "Ignoring prim %s from SCCP USER SAP\n", @@ -447,8 +456,6 @@ const char *addr_name, const char *label, uint32_t default_pc) { - struct osmo_ss7_instance *ss7_tmp; - if (!addr_name) { osmo_sccp_make_addr_pc_ssn(dest, default_pc, OSMO_SCCP_SSN_RANAP); LOGP(DMAIN, LOGL_INFO, "%s remote addr not configured, using default: %s\n", label, @@ -456,21 +463,13 @@ return 0; }

- ss7_tmp = osmo_sccp_addr_by_name(dest, addr_name); - if (!ss7_tmp) { + *ss7 = osmo_sccp_addr_by_name(dest, addr_name); + if (!*ss7) { LOGP(DMAIN, LOGL_ERROR, "%s remote addr: no such SCCP address book entry: '%s'\n", - label, addr_name); + label, addr_name); return -1; }

- if (*ss7 && (*ss7 != ss7_tmp)) { - LOGP(DMAIN, LOGL_ERROR, "IuCS and IuPS cannot be served from separate CS7 instances," - " cs7 instance %d != %d\n", (*ss7)->cfg.id, ss7_tmp->cfg.id); - return -1; - } - - *ss7 = ss7_tmp; - osmo_sccp_addr_set_ssn(dest, OSMO_SCCP_SSN_RANAP);

if (!addr_has_pc_and_ssn(dest)) { @@ -484,78 +483,173 @@ return 0; }

-int hnbgw_cnlink_init(struct hnb_gw *gw, const char *stp_host, uint16_t stp_port, const char *local_ip) +void cnlink_set_sccp_inst(struct hnbgw_cnlink *cnlink, struct hnbgw_sccp_inst *hsi) { - struct hnbgw_cnlink *cnlink; - struct osmo_ss7_instance *ss7; uint32_t local_pc;

- OSMO_ASSERT(!gw->sccp.client); - OSMO_ASSERT(!gw->sccp.cnlink); + cnlink->hnbgw_sccp_inst = hsi;

- ss7 = NULL; - if (resolve_addr_name(&gw->sccp.iucs_remote_addr, &ss7, - gw->config.iucs_remote_addr_name, "IuCS", (23 << 3) + 1)) - return -1; - if (resolve_addr_name(&gw->sccp.iups_remote_addr, &ss7, - gw->config.iups_remote_addr_name, "IuPS", (23 << 3) + 4)) - return -1; - - if (!ss7) { - LOGP(DRANAP, LOGL_NOTICE, "No cs7 instance configured for IuCS nor IuPS," - " creating default instance\n"); - ss7 = osmo_ss7_instance_find_or_create(gw, 0); - if (!ss7) - return -1; - ss7->cfg.primary_pc = (23 << 3) + 5; + if ((cnlink->local_addr.presence & OSMO_SCCP_ADDR_T_PC) + && osmo_ss7_pc_is_valid(cnlink->local_addr.pc)) { + local_pc = cnlink->local_addr.pc; + } else { + struct osmo_ss7_instance *ss7 = osmo_sccp_get_ss7(hsi->sccp); + OSMO_ASSERT(ss7); + local_pc = ss7->cfg.primary_pc; }

- if (!osmo_ss7_pc_is_valid(ss7->cfg.primary_pc)) { - LOGP(DMAIN, LOGL_ERROR, "IuCS/IuPS uplink cannot be setup: CS7 instance %d has no point-code set\n", - ss7->cfg.id); - return -1; - } - local_pc = ss7->cfg.primary_pc; + osmo_sccp_make_addr_pc_ssn(&cnlink->local_addr, local_pc, OSMO_SCCP_SSN_RANAP); +}

- osmo_sccp_make_addr_pc_ssn(&gw->sccp.local_addr, local_pc, OSMO_SCCP_SSN_RANAP); - LOGP(DRANAP, LOGL_NOTICE, "Local SCCP addr: %s\n", osmo_sccp_addr_name(ss7, &gw->sccp.local_addr)); +/* If not present yet, set up all of osmo_ss7_instance, osmo_sccp_instance and hnbgw_sccp_inst for the given cnlink. + * The cs7 instance nr to use is determined by cnlink->remote_addr_name, or cs7 instance 0 if that is not present. + * Set cnlink->hnbgw_sccp_inst to the new SCCP instance. Return 0 on success, negative on error. */ +int cnlink_ensure_sccp(struct hnbgw_cnlink *cnlink) +{ + struct hnb_gw *gw = cnlink->gw; + struct osmo_ss7_instance *ss7 = NULL; + struct osmo_sccp_instance *sccp; + struct osmo_sccp_user *sccp_user; + uint32_t local_pc; + struct hnbgw_sccp_inst *hsi;

- gw->sccp.client = osmo_sccp_simple_client_on_ss7_id(gw, ss7->cfg.id, "OsmoHNBGW", - local_pc, OSMO_SS7_ASP_PROT_M3UA, - 0, local_ip, stp_port, stp_host); - if (!gw->sccp.client) { - LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP Client\n"); - return -1; + /* If a hnbgw_sccp_inst has already been set up, use that. */ + if (cnlink->hnbgw_sccp_inst) + return 0; + + /* Figure out which cs7 instance to use. If cnlink->remote_addr_name is set, it points to an address book entry + * in a specific cs7 instance. If it is not set, leave ss7 == NULL to use cs7 instance 0. */ + if (cnlink->remote_addr_name) { + if (resolve_addr_name(&cnlink->remote_addr, &ss7, cnlink->remote_addr_name, cnlink->name, + DEFAULT_PC_HNBGW)) { + LOG_CNLINK(cnlink, DCN, LOGL_ERROR, "cannot initialize SCCP: there is no SCCP address named '%s'\n", + cnlink->remote_addr_name); + return -ENOENT; + } + + LOG_CNLINK(cnlink, DCN, LOGL_NOTICE, "using cs7 instance %u\n", ss7->cfg.id); + + /* Has another cnlink already set up an SCCP instance for this ss7? */ + llist_for_each_entry(hsi, &gw->sccp.instances, entry) { + if (hsi->cs7_instance != ss7->cfg.id) + continue; + cnlink_set_sccp_inst(cnlink, hsi); + return 0; + } + /* else cnlink->hnbgw_sccp_inst stays NULL and is set up below. */ + + /* All SCCP instances should originate from this function. So if there is no hnbgw_sccp_inst for the cs7 + * instance, then the cs7 instance should not have an SCCP instance yet. */ + OSMO_ASSERT(!ss7->sccp); }

- cnlink = talloc_zero(gw, struct hnbgw_cnlink); - cnlink->gw = gw; - INIT_LLIST_HEAD(&cnlink->map_list); - cnlink->T_RafC.cb = cnlink_trafc_cb; - cnlink->T_RafC.data = gw; - cnlink->next_conn_id = 1000; + /* No SCCP instance yet for this ss7. Create it. */ + sccp = osmo_sccp_simple_client_on_ss7_id(gw, ss7 ? ss7->cfg.id : 0, cnlink->name, DEFAULT_PC_HNBGW, + OSMO_SS7_ASP_PROT_M3UA, 0, "localhost", -1, "localhost"); + if (!sccp) { + LOG_CNLINK(cnlink, DCN, LOGL_ERROR, "Failed to configure 'cs7 instance %u'\n", ss7->cfg.id); + return -1; + } + ss7 = osmo_sccp_get_ss7(sccp);

- cnlink->sccp_user = osmo_sccp_user_bind_pc(gw->sccp.client, "OsmoHNBGW", sccp_sap_up, - OSMO_SCCP_SSN_RANAP, gw->sccp.local_addr.pc); - if (!cnlink->sccp_user) { + /* If the cnlink provides a local point-code, use that. */ + if ((cnlink->local_addr.presence & OSMO_SCCP_ADDR_T_PC) + && osmo_ss7_pc_is_valid(cnlink->local_addr.pc)) + local_pc = cnlink->local_addr.pc; + else if (osmo_ss7_pc_is_valid(ss7->cfg.primary_pc)) + local_pc = ss7->cfg.primary_pc; + else + local_pc = DEFAULT_PC_HNBGW; + + sccp_user = osmo_sccp_user_bind_pc(sccp, "OsmoHNBGW", sccp_sap_up, OSMO_SCCP_SSN_RANAP, local_pc); + if (!sccp_user) { LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP User\n"); return -1; }

- LOGP(DRANAP, LOGL_NOTICE, "Remote SCCP addr: IuCS: %s\n", - osmo_sccp_addr_name(ss7, &gw->sccp.iucs_remote_addr)); - LOGP(DRANAP, LOGL_NOTICE, "Remote SCCP addr: IuPS: %s\n", - osmo_sccp_addr_name(ss7, &gw->sccp.iups_remote_addr)); + hsi = talloc(cnlink, struct hnbgw_sccp_inst); + *hsi = (struct hnbgw_sccp_inst){ + .gw = gw, + .name = talloc_asprintf(hsi, "cs7-%u.sccp", ss7->cfg.id), + .cs7_instance = ss7->cfg.id, + .sccp = sccp, + .sccp_user = sccp_user, + .next_conn_id = 1, + }; + hash_init(hsi->hnbgw_context_map_by_conn_id);

- /* In sccp_sap_up() we expect the cnlink in the user's priv. */ - osmo_sccp_user_set_priv(cnlink->sccp_user, cnlink); + osmo_sccp_user_set_priv(sccp_user, hsi);

- gw->sccp.cnlink = cnlink; + llist_add_tail(&hsi->entry, &gw->sccp.instances);

+ cnlink_set_sccp_inst(cnlink, hsi); return 0; }

+struct hnbgw_cnlink *hnbgw_cnlink_alloc(struct hnb_gw *gw, const char *remote_addr_name, + RANAP_CN_DomainIndicator_t domain) +{ + struct hnbgw_cnlink *cnlink; + + cnlink = talloc(gw, struct hnbgw_cnlink); + *cnlink = (struct hnbgw_cnlink){ + .gw = gw, + .name = talloc_strdup(cnlink, remote_addr_name), + .domain = domain, + .remote_addr_name = talloc_strdup(cnlink, remote_addr_name), + .T_RafC = { + .cb = cnlink_trafc_cb, + .data = cnlink, + }, + }; + + INIT_LLIST_HEAD(&cnlink->map_list); + + if (cnlink_ensure_sccp(cnlink)) { + /* error logging already in cnlink_ensure_sccp() */ + talloc_free(cnlink); + return NULL; + } + + switch (domain) { + case DOMAIN_CS: + OSMO_ASSERT(!gw->sccp.cnlink_iucs); + gw->sccp.cnlink_iucs = cnlink; + break; + case DOMAIN_PS: + OSMO_ASSERT(!gw->sccp.cnlink_iups); + gw->sccp.cnlink_iups = cnlink; + break; + default: + OSMO_ASSERT(false); + } + + return cnlink; +} + const struct osmo_sccp_addr *hnbgw_cn_get_remote_addr(struct hnb_gw *gw, bool is_ps) { - return is_ps ? &gw->sccp.iups_remote_addr : &gw->sccp.iucs_remote_addr; + struct hnbgw_cnlink *cnlink = is_ps ? gw->sccp.cnlink_iups : gw->sccp.cnlink_iucs; + if (!cnlink) + return NULL; + return &cnlink->remote_addr; +} + +static bool cnlink_matches(const struct hnbgw_cnlink *cnlink, const struct hnbgw_sccp_inst *hsi, const struct osmo_sccp_addr *remote_addr) +{ + if (cnlink->hnbgw_sccp_inst != hsi) + return false; + if (osmo_sccp_addr_cmp(&cnlink->remote_addr, remote_addr, OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC)) + return false; + return true; +} +struct hnbgw_cnlink *hnbgw_cnlink_find_by_addr(const struct hnbgw_sccp_inst *hsi, + const struct osmo_sccp_addr *remote_addr) +{ + /* FUTURE: loop over llist g_hnb_gw->sccp.cnlinks */ + if (cnlink_matches(hsi->gw->sccp.cnlink_iucs, hsi, remote_addr)) + return hsi->gw->sccp.cnlink_iucs; + if (cnlink_matches(hsi->gw->sccp.cnlink_iups, hsi, remote_addr)) + return hsi->gw->sccp.cnlink_iups; + return NULL; } diff --git a/src/osmo-hnbgw/hnbgw_rua.c b/src/osmo-hnbgw/hnbgw_rua.c index 83410b9..f0dc124 100644 --- a/src/osmo-hnbgw/hnbgw_rua.c +++ b/src/osmo-hnbgw/hnbgw_rua.c @@ -200,7 +200,6 @@ { struct msgb *ranap_msg = NULL; struct hnbgw_context_map *map = NULL; - struct hnbgw_cnlink *cn = hnb->gw->sccp.cnlink; bool is_ps;

switch (cN_DomainIndicator) { @@ -215,11 +214,6 @@ return -1; }

- if (!cn) { - LOGHNB(hnb, DRUA, LOGL_NOTICE, "CN=NULL, discarding message\n"); - return 0; - } - /* If there is RANAP data, include it in the msgb. In RUA there is always data in practice, but theoretically it * could be an empty Connect or Disconnect. */ if (data && len) { @@ -230,8 +224,13 @@ memcpy(ranap_msg->l2h, data, len); }

- map = context_map_alloc_by_hnb(hnb, context_id, is_ps, cn); - OSMO_ASSERT(map); + map = context_map_find_or_create_by_rua_ctx_id(hnb, context_id, is_ps); + if (!map) { + LOGHNB(hnb, DRUA, LOGL_ERROR, + "Failed to create context map for %s: rx RUA %s with %u bytes RANAP data\n", + is_ps ? "IuPS" : "IuCS", rua_procedure_code_name(rua_procedure), data ? len : 0); + return -1; + }

LOG_MAP(map, DRUA, LOGL_DEBUG, "rx RUA %s with %u bytes RANAP data\n", rua_procedure_code_name(rua_procedure), data ? len : 0); diff --git a/src/osmo-hnbgw/hnbgw_vty.c b/src/osmo-hnbgw/hnbgw_vty.c index 8d2366f..1be9ce0 100644 --- a/src/osmo-hnbgw/hnbgw_vty.c +++ b/src/osmo-hnbgw/hnbgw_vty.c @@ -134,36 +134,51 @@ return vty->node; }

-DEFUN(show_cnlink, show_cnlink_cmd, "show cnlink", - SHOW_STR "Display information on core network link\n") +static void _show_cnlink(struct vty *vty, struct hnbgw_cnlink *cnlink) { struct osmo_ss7_route *rt; - struct osmo_ss7_instance *ss7 = osmo_sccp_get_ss7(g_hnb_gw->sccp.client); + struct osmo_ss7_instance *ss7; + + if (!cnlink) { + vty_out(vty, "NULL%s", VTY_NEWLINE); + return; + } + + if (!cnlink->hnbgw_sccp_inst) { + vty_out(vty, "no SCCP instance%s", VTY_NEWLINE); + return; + } + + if (!cnlink->hnbgw_sccp_inst->sccp_user) { + vty_out(vty, "no SCCP user%s", VTY_NEWLINE); + return; + } + + ss7 = osmo_sccp_get_ss7(cnlink->hnbgw_sccp_inst->sccp); #define GUARD(STR) \ STR ? STR : "", \ STR ? ":" : ""

- vty_out(vty, "IuCS: %s <->", - osmo_sccp_user_name(g_hnb_gw->sccp.cnlink->sccp_user)); + vty_out(vty, "%s <->", + osmo_sccp_user_name(cnlink->hnbgw_sccp_inst->sccp_user)); vty_out(vty, " %s%s%s%s", - GUARD(g_hnb_gw->config.iucs_remote_addr_name), - osmo_sccp_inst_addr_name(g_hnb_gw->sccp.client, &g_hnb_gw->sccp.iucs_remote_addr), + GUARD(cnlink->remote_addr_name), + osmo_sccp_inst_addr_name(cnlink->hnbgw_sccp_inst->sccp, &cnlink->remote_addr), VTY_NEWLINE);

- rt = osmo_ss7_route_lookup(ss7, g_hnb_gw->sccp.iucs_remote_addr.pc); - vty_out(vty, " SS7 route: %s%s", osmo_ss7_route_name(rt, true), VTY_NEWLINE); - - vty_out(vty, "IuPS: %s <->", - osmo_sccp_user_name(g_hnb_gw->sccp.cnlink->sccp_user)); - vty_out(vty, " %s%s%s%s", - GUARD(g_hnb_gw->config.iups_remote_addr_name), - osmo_sccp_inst_addr_name(g_hnb_gw->sccp.client, &g_hnb_gw->sccp.iups_remote_addr), - VTY_NEWLINE); - - rt = osmo_ss7_route_lookup(ss7, g_hnb_gw->sccp.iups_remote_addr.pc); + rt = osmo_ss7_route_lookup(ss7, cnlink->remote_addr.pc); vty_out(vty, " SS7 route: %s%s", osmo_ss7_route_name(rt, true), VTY_NEWLINE);

#undef GUARD +} + +DEFUN(show_cnlink, show_cnlink_cmd, "show cnlink", + SHOW_STR "Display information on core network link\n") +{ + vty_out(vty, "IuCS: "); + _show_cnlink(vty, g_hnb_gw->sccp.cnlink_iucs); + vty_out(vty, "IuPS: "); + _show_cnlink(vty, g_hnb_gw->sccp.cnlink_iups); return CMD_SUCCESS; }