2022-12-16 16:52:35 +00:00
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/gsm/tlv.h>
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#include "v5x_internal.h"
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#include "v5x_protocol.h"
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#include "lapv5.h"
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#include "v5x_le_ctrl_fsm.h"
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#include "v5x_le_port_fsm.h"
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#include "v5x_le_pstn_fsm.h"
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#include "v5x_le_management.h"
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#include "logging.h"
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static LLIST_HEAD(v5_instances);
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struct v5x_instance *v5x_instance_alloc(void *ctx)
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{
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struct v5x_instance *v5i = talloc_zero(ctx, struct v5x_instance);
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if (!v5i)
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return NULL;
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INIT_LLIST_HEAD(&v5i->interfaces);
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llist_add_tail(&v5i->list, &v5_instances);
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return v5i;
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}
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static void v5x_ts_init(struct v5x_timeslot *v5ts, uint8_t nr, struct v5x_link *v5l, uint16_t l3_addr)
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{
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v5ts->nr = nr;
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v5ts->link = v5l;
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v5ts->l3_address = l3_addr;
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}
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static void v5x_cchan_init(struct v5x_c_channel *v5cc, struct v5x_link *v5l, struct v5x_timeslot *v5ts, bool active)
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{
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v5cc->link = v5l;
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v5cc->ts = v5ts;
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v5cc->active = active;
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}
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static void v5x_link_init(struct v5x_link *v5l, struct v5x_interface *v5if, uint8_t id)
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{
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unsigned int i;
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v5l->id = id;
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v5l->interface = v5if;
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for (i = 1; i < ARRAY_SIZE(v5l->ts); i++) {
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v5x_ts_init(&v5l->ts[i], i, v5l, 0 /*l3_addr*/);
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}
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/* primary c-channel must always be present */
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v5x_cchan_init(&v5l->c_channel[0], v5l, &v5l->ts[16], true);
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}
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struct v5x_interface *v5x_interface_alloc(struct v5x_instance *v5i, enum v5x_dialect dialect,
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int (*ph_data_req_cb)(struct msgb *msg, void *cbdata))
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{
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struct v5x_interface *v5if = talloc_zero(v5i, struct v5x_interface);
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//struct v5x_link *v5l;
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struct v5x_c_channel *primary_c_chan;
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v5if->instance = v5i;
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v5if->dialect = dialect;
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/* primary link must alwasy be present */
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v5x_link_init(&v5if->links[0], v5if, 0);
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v5if->primary_link = &v5if->links[0];
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primary_c_chan = &v5if->primary_link->c_channel[0];
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v5if->control.ctrl = v5x_le_ctrl_create(v5if, NULL, 0);
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if (!v5if->control.ctrl)
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return NULL;
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v5if->control.li = lapv5_instance_alloc(1, ph_data_req_cb, v5if, v5x_rcv, v5if,
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&lapd_profile_lapv5dl, "control");
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v5if->control.c_chan = primary_c_chan;
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v5if->pstn.li = lapv5_instance_alloc(1, ph_data_req_cb, v5if, v5x_rcv, v5if,
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&lapd_profile_lapv5dl, "pstn");
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v5if->pstn.c_chan = primary_c_chan;
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if (v5if->dialect == V5X_DIALECT_V52) {
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v5if->lcp.li = lapv5_instance_alloc(1, ph_data_req_cb, v5if, v5x_rcv, v5if,
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&lapd_profile_lapv5dl, "lcp");
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v5if->lcp.c_chan = primary_c_chan;
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v5if->bcc.li = lapv5_instance_alloc(1, ph_data_req_cb, v5if, v5x_rcv, v5if,
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&lapd_profile_lapv5dl, "bcc");
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v5if->bcc.c_chan = primary_c_chan;
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v5if->protection[0].li = lapv5_instance_alloc(1, ph_data_req_cb, v5if, v5x_rcv, v5if,
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&lapd_profile_lapv5dl, "protection0");
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v5if->protection[0].c_chan = primary_c_chan;
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//protection[1] ?
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}
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INIT_LLIST_HEAD(&v5if->user_ports);
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llist_add_tail(&v5if->list, &v5i->interfaces);
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return v5if;
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}
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2022-12-18 09:07:24 +00:00
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void v5x_interface_free(struct v5x_interface *v5if) {
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struct v5x_user_port *v5up, *v5up2;
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llist_for_each_entry_safe(v5up, v5up2, &v5if->user_ports, list)
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v5x_user_port_destroy(v5up);
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if (v5if->control.ctrl)
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v5x_le_ctrl_destroy(v5if->control.ctrl);
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if (v5if->control.li)
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lapv5_instance_free(v5if->control.li);
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if (v5if->pstn.li)
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lapv5_instance_free(v5if->pstn.li);
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if (v5if->lcp.li)
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lapv5_instance_free(v5if->lcp.li);
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if (v5if->bcc.li)
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lapv5_instance_free(v5if->bcc.li);
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if (v5if->protection[0].li)
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lapv5_instance_free(v5if->protection[0].li);
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if (v5if->protection[1].li)
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lapv5_instance_free(v5if->protection[1].li);
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llist_del(&v5if->list);
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talloc_free(v5if);
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}
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2022-12-16 16:52:35 +00:00
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struct v5x_user_port *v5x_user_port_create(struct v5x_interface *v5if, uint16_t nr, enum v5x_user_type type,
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uint8_t ts1, uint8_t ts2)
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{
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struct v5x_user_port *v5up;
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int rc;
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if ((v5up = v5if->links[0].ts[ts1].v5up)) {
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LOGP(DV5, LOGL_ERROR, "Time slot %d is already assigned to another user port\n", ts1);
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return NULL;
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}
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if (type == V5X_USER_TYPE_ISDN) {
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if ((v5up = v5if->links[0].ts[ts2].v5up)) {
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LOGP(DV5, LOGL_ERROR, "Time slot %d is already assigned to another user port\n", ts2);
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return NULL;
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}
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}
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v5up = talloc_zero(v5if, struct v5x_user_port);
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if (!v5up)
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return NULL;
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llist_add_tail(&v5up->list, &v5if->user_ports);
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v5up->inst = v5if;
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v5up->nr = nr;
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v5up->type = type;
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/* assign ports */
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if (v5if->dialect == V5X_DIALECT_V51) {
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OSMO_ASSERT(ts1 >= 1 && ts1 <= 31);
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v5if->links[0].ts[ts1].v5up = v5up;
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v5up->ts_nr[0] = ts1;
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if (type == V5X_USER_TYPE_ISDN) {
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OSMO_ASSERT(ts2 >= 1 && ts2 <= 31);
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v5if->links[0].ts[ts2].v5up = v5up;
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v5up->ts_nr[1] = ts2;
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}
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}
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v5up->ctrl = v5x_le_ctrl_create(NULL, v5up, nr);
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if (!v5up->ctrl) {
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LOGP(DV5, LOGL_ERROR, "Failed to create control protocol\n");
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v5x_user_port_destroy(v5up);
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return NULL;
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}
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switch (type) {
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case V5X_USER_TYPE_ISDN:
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LOGP(DV5, LOGL_NOTICE, "Creating V5 ISDN user port with L3 addr %d\n", nr);
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sprintf(v5up->ifname, "isdn-%d", nr);
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OSMO_ASSERT(nr <= 8175);
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v5up->port_fi = v5x_le_port_isdn_create(v5up, nr);
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if (!v5up->port_fi) {
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LOGP(DV5, LOGL_ERROR, "Failed to create port control\n");
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v5x_user_port_destroy(v5up);
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return NULL;
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}
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break;
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case V5X_USER_TYPE_PSTN:
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LOGP(DV5, LOGL_NOTICE, "Creating V5 PSTN user port with L3 addr %d\n", nr);
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sprintf(v5up->ifname, "pstn-%d", nr);
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OSMO_ASSERT(nr <= 32767);
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v5up->port_fi = v5x_le_port_pstn_create(v5up, nr);
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if (!v5up->port_fi) {
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LOGP(DV5, LOGL_ERROR, "Failed to create port control\n");
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v5x_user_port_destroy(v5up);
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return NULL;
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}
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v5up->pstn.proto = v5x_le_pstn_create(v5up, nr);
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if (!v5up->pstn.proto) {
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LOGP(DV5, LOGL_ERROR, "Failed to create PSTN protocol\n");
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v5x_user_port_destroy(v5up);
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return NULL;
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}
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/* bring port into service */
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v5x_le_pstn_mdu_snd(v5up, MDU_CTRL_port_blocked);
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break;
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}
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rc = ph_socket_init(&v5up->ph_socket, ph_socket_rx_cb, v5up, v5up->ifname, 1);
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if (rc < 0) {
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LOGP(DV5, LOGL_ERROR, "Failed to create PH-socket\n");
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v5x_user_port_destroy(v5up);
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return NULL;
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}
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return v5up;
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}
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void v5x_user_port_destroy(struct v5x_user_port *v5up)
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{
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struct v5x_interface *v5if = v5up->inst;
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LOGP(DV5, LOGL_NOTICE, "Destroying V5 user port with L3 addr %d\n", v5up->nr);
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/* close fitst, because it sends messages */
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ph_socket_exit(&v5up->ph_socket);
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/* unassign ports */
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if (v5up->ts_nr[0])
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v5if->links[v5up->link_nr[0]].ts[v5up->ts_nr[0]].v5up = NULL;
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if (v5up->ts_nr[1])
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v5if->links[v5up->link_nr[1]].ts[v5up->ts_nr[1]].v5up = NULL;
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if (v5up->ctrl)
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v5x_le_ctrl_destroy(v5up->ctrl);
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if (v5up->port_fi)
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osmo_fsm_inst_free(v5up->port_fi);
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if (v5up->pstn.proto)
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v5x_le_pstn_destroy(v5up->pstn.proto);
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llist_del(&v5up->list);
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talloc_free(v5up);
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}
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struct v5x_user_port *v5x_user_port_find(struct v5x_interface *v5if, uint16_t nr, bool is_isdn)
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{
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struct v5x_user_port *v5up;
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llist_for_each_entry(v5up, &v5if->user_ports, list) {
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if (v5up->nr == nr && is_isdn == (v5up->type == V5X_USER_TYPE_ISDN))
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return v5up;
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}
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return NULL;
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}
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