556 lines
20 KiB
C
556 lines
20 KiB
C
/*
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* (C) 2021-2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* All Rights Reserved.
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*
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* Author: Neels Janosch Hofmeyr <nhofmeyr@sysmocom.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <time.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/core/tdef.h>
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#include <osmocom/pfcp/pfcp_endpoint.h>
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#include <osmocom/pfcp/pfcp_msg.h>
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/* Send/receive PFCP messages to/from remote PFCP endpoints. */
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struct osmo_pfcp_endpoint {
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struct osmo_pfcp_endpoint_cfg cfg;
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/* PFCP socket */
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struct osmo_fd pfcp_fd;
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/* The time at which this endpoint last restarted, as seconds since unix epoch. */
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uint32_t recovery_time_stamp;
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/* State for determining the next sequence number for transmitting a request message */
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uint32_t seq_nr_state;
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/* All transmitted PFCP Request messages, list of osmo_pfcp_queue_entry.
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* For a transmitted Request message, wait for a matching Response from a remote peer; if none arrives,
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* retransmit (see n1 and t1_ms). */
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struct llist_head sent_requests;
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/* All transmitted PFCP Response messages, list of osmo_pfcp_queue_entry.
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* For a transmitted Response message, keep it in the queue for a fixed amount of time. If the peer retransmits
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* the original Request, do not dispatch the Request, but respond with the queued message directly. */
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struct llist_head sent_responses;
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};
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/*! Entry of pfcp_endpoint message queue of PFCP messages, for re-transsions. */
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struct osmo_pfcp_queue_entry {
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/* entry in osmo_pfcp_endpoint.sent_requests or .sent_responses */
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struct llist_head entry;
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/* back-pointer */
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struct osmo_pfcp_endpoint *ep;
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/* message we have transmitted */
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struct osmo_pfcp_msg *m;
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/* T1 timer: wait for response before retransmitting request / keep response in case the same request is
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* received again. */
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struct osmo_timer_list t1;
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/* N1: number of pending re-transmissions */
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unsigned int n1_remaining;
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};
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/* Find a matching osmo_pfcp_queue_entry for given rx.
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* A returned osmo_pfcp_queue_entry is guaranteed to be a Response if rx is a Request, and vice versa. */
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static struct osmo_pfcp_queue_entry *osmo_pfcp_queue_find(struct llist_head *queue, const struct osmo_pfcp_msg *rx)
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{
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struct osmo_pfcp_queue_entry *qe;
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/* It's important to match only a Request to a Response and vice versa, because the remote peer makes its own
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* sequence_nr. There could be a collision of sequence_nr. But as long as all Requests look for a Response and
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* vice versa, the sequence_nr scopes don't overlap. */
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llist_for_each_entry(qe, queue, entry) {
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if (qe->m->is_response != rx->is_response
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&& qe->m->h.sequence_nr == rx->h.sequence_nr)
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return qe;
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}
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return NULL;
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}
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/* clean up and deallocate the given osmo_pfcp_queue_entry */
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static void osmo_pfcp_queue_del(struct osmo_pfcp_queue_entry *qe)
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{
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/* see also the talloc destructor: osmo_pfcp_queue_destructor() */
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talloc_free(qe);
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}
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static int osmo_pfcp_queue_destructor(struct osmo_pfcp_queue_entry *qe)
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{
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osmo_timer_del(&qe->t1);
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llist_del(&qe->entry);
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return 0;
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}
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/* Global timer definitions for PFCP operation, provided for convenience. A caller of the PFCP API may decide to use
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* these in osmo_pfcp_endpoint and own FSM implementations. To make these user configurable, it is convenient to add
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* osmo_pfcp_tdefs as one of your program's osmo_tdef_group entries and call osmo_tdef_vty_init(). */
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struct osmo_tdef osmo_pfcp_tdefs[] = {
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{ .T = OSMO_PFCP_TIMER_HEARTBEAT_REQ, .default_val = 15, .unit = OSMO_TDEF_S,
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.desc = "PFCP Heartbeat Request period, how long to wait between issuing requests"
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},
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{ .T = OSMO_PFCP_TIMER_HEARTBEAT_RESP, .default_val = 15, .unit = OSMO_TDEF_S,
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.desc = "PFCP Heartbeat Response timeout, the time after which to regard a non-responding peer as disconnected"
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},
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{ .T = OSMO_PFCP_TIMER_GRACEFUL_REL, .default_val = 15, .unit = OSMO_TDEF_S,
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.desc = "PFCP peer graceful shutdown timeout, how long to keep the peer's state after a peer requested"
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" graceful shutdown"
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},
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{ .T = OSMO_PFCP_TIMER_T1, .default_val = 3000, .unit = OSMO_TDEF_MS,
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.desc = "PFCP request timeout, how long after a missing response to retransmit a PFCP request"
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},
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{ .T = OSMO_PFCP_TIMER_N1, .default_val = 3, .unit = OSMO_TDEF_CUSTOM,
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.desc = "Number of PFCP request retransmission attempts"
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},
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{ .T = OSMO_PFCP_TIMER_KEEP_RESP, .default_val = 10000, .unit = OSMO_TDEF_MS,
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.desc = "PFCP response timeout, how long to keep a response, in case its same request is retransmitted by the peer"
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},
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{ .T = OSMO_PFCP_TIMER_ASSOC_RETRY, .default_val = 15, .unit = OSMO_TDEF_S,
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.desc = "Idle time between attempts of PFCP Association Setup (CPF)"
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},
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{}
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};
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/* Allocate a PFCP endpoint. Copy cfg's content to the allocated endpoint struct. Set the recovery_time_stamp to the
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* current time. */
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struct osmo_pfcp_endpoint *osmo_pfcp_endpoint_create(void *ctx, const struct osmo_pfcp_endpoint_cfg *cfg)
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{
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struct osmo_pfcp_endpoint *ep = talloc_zero(ctx, struct osmo_pfcp_endpoint);
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uint32_t unix_time;
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if (!ep)
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return NULL;
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ep->cfg = *cfg;
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if (!ep->cfg.tdefs)
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ep->cfg.tdefs = osmo_pfcp_tdefs;
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INIT_LLIST_HEAD(&ep->sent_requests);
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INIT_LLIST_HEAD(&ep->sent_responses);
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ep->pfcp_fd.fd = -1;
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/* time() returns seconds since 1970 (UNIX epoch), but the recovery_time_stamp is coded in the NTP format, which is
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* seconds since 1900, the NTP era 0. 2208988800L is the offset between UNIX epoch and NTP era 0.
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* TODO: what happens when we enter NTP era 1? Is it sufficient to integer-wrap? */
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unix_time = time(NULL);
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ep->recovery_time_stamp = unix_time + 2208988800L;
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LOGP(DLPFCP, LOGL_NOTICE, "PFCP endpoint: recovery timestamp = 0x%08x (%u seconds since UNIX epoch,"
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" which is %u seconds since NTP era 0; IETF RFC 5905)\n",
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ep->recovery_time_stamp, unix_time, ep->recovery_time_stamp);
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return ep;
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}
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static unsigned int ep_n1(struct osmo_pfcp_endpoint *ep)
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{
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return osmo_tdef_get(ep->cfg.tdefs, OSMO_PFCP_TIMER_N1, OSMO_TDEF_CUSTOM, -1);
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}
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static unsigned int ep_t1(struct osmo_pfcp_endpoint *ep)
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{
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return osmo_tdef_get(ep->cfg.tdefs, OSMO_PFCP_TIMER_T1, OSMO_TDEF_MS, -1);
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}
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static unsigned int ep_keep_resp(struct osmo_pfcp_endpoint *ep)
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{
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return osmo_tdef_get(ep->cfg.tdefs, OSMO_PFCP_TIMER_KEEP_RESP, OSMO_TDEF_MS, -1);
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}
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static int osmo_pfcp_endpoint_tx_data_no_logging(struct osmo_pfcp_endpoint *ep, struct osmo_pfcp_msg *m);
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/* Return true to keep the message in the queue, false for dropping from the queue. */
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static bool pfcp_queue_retrans(struct osmo_pfcp_queue_entry *qe)
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{
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struct osmo_pfcp_endpoint *endpoint = qe->ep;
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unsigned int t1_ms = ep_t1(endpoint);
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struct osmo_pfcp_msg *m = qe->m;
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int rc;
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/* if no more attempts remaining, drop from queue */
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if (!qe->n1_remaining)
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return false;
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/* re-transmit */
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qe->n1_remaining--;
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OSMO_LOG_PFCP_MSG(m, LOGL_INFO, "re-sending (%u attempts remaining after this)\n", qe->n1_remaining);
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rc = osmo_pfcp_endpoint_tx_data_no_logging(endpoint, m);
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/* If encoding failed, it cannot ever succeed. Drop the queue entry. (Error logging already taken care of in
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* osmo_pfcp_endpoint_tx_data_no_logging().) */
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if (rc)
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return false;
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/* re-schedule timer, keep in queue */
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osmo_timer_schedule(&qe->t1, t1_ms/1000, (t1_ms % 1000) * 1000);
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return true;
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}
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/* T1 for a given sent_requests queue entry has expired */
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static void pfcp_queue_sent_req_timer_cb(void *data)
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{
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struct osmo_pfcp_queue_entry *qe = data;
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bool keep;
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/* qe->m is a request sent earlier */
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OSMO_ASSERT(!qe->m->is_response);
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/* The request is still here, which means it has not received a response from the remote side.
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* Retransmit the request. */
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keep = pfcp_queue_retrans(qe);
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if (keep)
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return;
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/* Retransmission has elapsed. Notify resp_cb that receiving a response has failed. */
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if (qe->m->ctx.resp_cb)
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qe->m->ctx.resp_cb(qe->m, NULL, "PFCP request retransmissions elapsed, no response received");
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/* Drop the queue entry. No more retransmissions. */
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osmo_pfcp_queue_del(qe);
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}
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/* T1 for a given sent_responses queue entry has expired */
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static void pfcp_queue_sent_resp_timer_cb(void *data)
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{
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struct osmo_pfcp_queue_entry *qe = data;
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/* qe->m is a response sent earlier */
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OSMO_ASSERT(qe->m->is_response);
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/* The response has waited in the queue for any retransmissions of its initiating request. Now that time
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* has passed and the response can be dropped from the queue. */
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osmo_pfcp_queue_del(qe);
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}
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/* Directly encode and transmit the message, without storing in the retrans_queue. */
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static int osmo_pfcp_endpoint_tx_data_no_logging(struct osmo_pfcp_endpoint *ep, struct osmo_pfcp_msg *m)
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{
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int rc;
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if (!m->encoded) {
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/* Allocate msgb as child of the message m, so that when m gets deallocated at the end of
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* retransmission queueing, the msgb gets deallocated with it. */
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m->encoded = msgb_alloc_c(m, OSMO_PFCP_MSGB_ALLOC_SIZE, "PFCP-tx");
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OSMO_ASSERT(m->encoded);
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rc = osmo_pfcp_msg_encode(m->encoded, m);
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if (rc) {
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msgb_free(m->encoded);
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m->encoded = NULL;
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return rc;
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}
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}
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rc = sendto(ep->pfcp_fd.fd, msgb_data(m->encoded), msgb_length(m->encoded), 0,
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(struct sockaddr *)&m->remote_addr, sizeof(m->remote_addr));
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if (rc != msgb_length(m->encoded)) {
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OSMO_LOG_PFCP_MSG(m, LOGL_ERROR, "sendto() failed: rc = %d != length %u\n",
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rc, msgb_length(m->encoded));
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return -EIO;
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}
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return 0;
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}
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int osmo_pfcp_endpoint_tx_data(struct osmo_pfcp_endpoint *ep, struct osmo_pfcp_msg *m)
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{
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OSMO_LOG_PFCP_MSG(m, LOGL_INFO, "sending\n");
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return osmo_pfcp_endpoint_tx_data_no_logging(ep, m);
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}
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int osmo_pfcp_endpoint_tx_heartbeat_req(struct osmo_pfcp_endpoint *ep, const struct osmo_sockaddr *remote_addr)
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{
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struct osmo_pfcp_msg *tx = osmo_pfcp_msg_alloc_tx_req(OTC_SELECT, remote_addr, OSMO_PFCP_MSGT_HEARTBEAT_REQ);
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tx->ies.heartbeat_req.recovery_time_stamp = ep->recovery_time_stamp;
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tx->h.sequence_nr = osmo_pfcp_next_seq_nr(&ep->seq_nr_state);
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return osmo_pfcp_endpoint_tx_data(ep, tx);
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}
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/* add a given msgb to the queue of per-peer messages waiting for a response */
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static int osmo_pfcp_endpoint_retrans_queue_add(struct osmo_pfcp_endpoint *endpoint, struct osmo_pfcp_msg *m)
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{
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struct osmo_pfcp_queue_entry *qe;
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unsigned int n1 = ep_n1(endpoint);
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unsigned int t1_ms = ep_t1(endpoint);
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unsigned int keep_resp_ms = ep_keep_resp(endpoint);
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unsigned int timeout = m->is_response ? keep_resp_ms : t1_ms;
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LOGP(DLPFCP, LOGL_DEBUG, "retransmit unanswered Requests %u x %ums; keep sent Responses for %ums\n",
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n1, t1_ms, keep_resp_ms);
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/* If there are no retransmissions or no timeout, it makes no sense to add to the queue. */
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if (!n1 || !t1_ms) {
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if (!m->is_response && m->ctx.resp_cb)
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m->ctx.resp_cb(m, NULL, "PFCP timeout is zero, cannot wait for a response");
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return 0;
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}
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qe = talloc(endpoint, struct osmo_pfcp_queue_entry);
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OSMO_ASSERT(qe);
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*qe = (struct osmo_pfcp_queue_entry){
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.ep = endpoint,
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.m = m,
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.n1_remaining = m->is_response ? 0 : n1,
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};
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talloc_steal(qe, m);
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/* Slight optimization: Add sent requests to the start of the list: we will usually receive a response shortly
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* after sending a request, removing that entry from the queue quickly.
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* Add sent responses to the end of the list: they will rarely be retransmitted at all. */
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if (m->is_response) {
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llist_add_tail(&qe->entry, &endpoint->sent_responses);
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osmo_timer_setup(&qe->t1, pfcp_queue_sent_resp_timer_cb, qe);
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} else {
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llist_add(&qe->entry, &endpoint->sent_requests);
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osmo_timer_setup(&qe->t1, pfcp_queue_sent_req_timer_cb, qe);
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}
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talloc_set_destructor(qe, osmo_pfcp_queue_destructor);
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osmo_timer_schedule(&qe->t1, timeout/1000, (timeout % 1000) * 1000);
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return 0;
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}
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/* Transmit a PFCP message.
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* Store the message in the local message queue for possible retransmissions.
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* On success, return zero, and pass ownership of m to ep. ep deallocates m when all retransmissions are done / a reply
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* has been received.
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* On error, return nonzero, and immediately deallocate m.
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*
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* WARNING: Do not access the osmo_pfcp_msg m after calling this function! In most cases, m will still remain allocated,
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* and accessing it will work, but especially when an error occurs, m will be deallocated immediately. Hence, you will
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* see no problem during normal successful operation, but your program will crash with use-after-free on any error!
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*/
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int osmo_pfcp_endpoint_tx(struct osmo_pfcp_endpoint *ep, struct osmo_pfcp_msg *m)
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{
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struct osmo_pfcp_ie_node_id *node_id;
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int rc;
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if (!m->is_response)
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m->h.sequence_nr = osmo_pfcp_next_seq_nr(&ep->seq_nr_state);
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node_id = osmo_pfcp_msg_node_id(m);
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if (node_id)
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*node_id = ep->cfg.local_node_id;
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rc = osmo_pfcp_endpoint_tx_data(ep, m);
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if (rc) {
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if (!m->is_response && m->ctx.resp_cb)
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m->ctx.resp_cb(m, NULL, "Failed to transmit request");
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osmo_pfcp_msg_free(m);
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return rc;
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}
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osmo_pfcp_endpoint_retrans_queue_add(ep, m);
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return 0;
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}
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static void osmo_pfcp_endpoint_handle_rx(struct osmo_pfcp_endpoint *ep, struct osmo_pfcp_msg *m)
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{
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bool dispatch_rx = true;
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struct osmo_pfcp_queue_entry *prev_msg;
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struct osmo_pfcp_msg *req;
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if (m->h.message_type == OSMO_PFCP_MSGT_HEARTBEAT_REQ) {
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/* Directly answer with a Heartbeat Response. */
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struct osmo_pfcp_msg *resp = osmo_pfcp_msg_alloc_tx_resp(OTC_SELECT, m, OSMO_PFCP_MSGT_HEARTBEAT_RESP);
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resp->ies.heartbeat_resp.recovery_time_stamp = ep->recovery_time_stamp;
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osmo_pfcp_endpoint_tx_data(ep, resp);
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/* Still also dispatch the Rx event to the peer. */
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}
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/* If this is receiving a response, search for matching sent request that is now completed.
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* If this is receiving a request, search for a matching sent response that can be retransmitted.
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* A match is found by sequence_nr. */
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prev_msg = osmo_pfcp_queue_find(m->is_response ? &ep->sent_requests : &ep->sent_responses, m);
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if (prev_msg && !m->is_response) {
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/* m is a request, and we have already sent a response to this same request earlier. Retransmit the same
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* response, and don't dispatch the msg rx. Keep our response queued in case the request is
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* retransmitted yet another time. */
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/* Populate message context to point at peer and session, if applicable.
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* With that context applied, log message rx. */
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if (ep->cfg.set_msg_ctx_cb)
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ep->cfg.set_msg_ctx_cb(ep, m, NULL);
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OSMO_LOG_PFCP_MSG(m, LOGL_INFO, "received retransmission of earlier request\n");
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/* Also log on the earlier PFCP msg that it is resent */
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OSMO_LOG_PFCP_MSG(prev_msg->m, LOGL_INFO, "re-sending cached response\n");
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osmo_pfcp_endpoint_tx_data_no_logging(ep, prev_msg->m);
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return;
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}
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req = NULL;
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if (prev_msg && m->is_response) {
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/* m is a response to the earlier request prev_msg->m. The request is now ACKed and can be dropped from
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* the retransmission queue: see 'if (req)' below. */
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req = prev_msg->m;
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}
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/* Populate message context to point at peer and session, if applicable.
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* With that context applied, log message rx. */
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if (ep->cfg.set_msg_ctx_cb)
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ep->cfg.set_msg_ctx_cb(ep, m, req);
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OSMO_LOG_PFCP_MSG(m, LOGL_INFO, "received\n");
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if (req && req->ctx.resp_cb) {
|
|
int rc = req->ctx.resp_cb(req, m, NULL);
|
|
/* Only dispatch the response to rx_msg() when resp_cb() asks for it with rc == 1 (or when there is no
|
|
* resp_cb()). */
|
|
if (rc != 1) {
|
|
dispatch_rx = false;
|
|
OSMO_LOG_PFCP_MSG(m, LOGL_DEBUG,
|
|
"response handled by m->resp_cb(), not dispatching to rx_msg_cb()\n");
|
|
}
|
|
}
|
|
|
|
if (dispatch_rx)
|
|
ep->cfg.rx_msg_cb(ep, m, req);
|
|
if (req)
|
|
osmo_pfcp_queue_del(prev_msg);
|
|
}
|
|
|
|
/* call-back for PFCP socket file descriptor */
|
|
static int osmo_pfcp_fd_cb(struct osmo_fd *ofd, unsigned int what)
|
|
{
|
|
int rc;
|
|
struct osmo_pfcp_endpoint *ep = ofd->data;
|
|
|
|
if (what & OSMO_FD_READ) {
|
|
struct osmo_sockaddr remote;
|
|
socklen_t remote_len = sizeof(remote);
|
|
struct msgb *msg = msgb_alloc_c(OTC_SELECT, OSMO_PFCP_MSGB_ALLOC_SIZE, "PFCP-rx");
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->l3h = msg->tail;
|
|
rc = recvfrom(ofd->fd, msg->tail, msgb_tailroom(msg), 0, (struct sockaddr *)&remote, &remote_len);
|
|
if (rc <= 0)
|
|
return -EIO;
|
|
msgb_put(msg, rc);
|
|
|
|
OSMO_ASSERT(ep->cfg.rx_msg_cb);
|
|
|
|
/* This may be a bundle of PFCP messages. Parse and receive each message received, by shifting l4h
|
|
* through the message bundle. */
|
|
msg->l4h = msg->l3h;
|
|
while (msgb_l4len(msg)) {
|
|
struct osmo_gtlv_load tlv;
|
|
struct osmo_pfcp_msg *m = osmo_pfcp_msg_alloc_rx(OTC_SELECT, &remote);
|
|
m->encoded = msg;
|
|
|
|
rc = osmo_pfcp_msg_decode_header(&tlv, m, msg);
|
|
if (rc < 0)
|
|
break;
|
|
msg->l4h += rc;
|
|
|
|
rc = osmo_pfcp_msg_decode_tlv(m, &tlv);
|
|
/* If errors occurred, they have already been logged on DLPFCP. */
|
|
if (rc == 0)
|
|
osmo_pfcp_endpoint_handle_rx(ep, m);
|
|
osmo_pfcp_msg_free(m);
|
|
}
|
|
msgb_free(msg);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*! bind a PFCP endpoint to its configured address (ep->cfg.local_addr).
|
|
* \return 0 on success, negative on error. */
|
|
int osmo_pfcp_endpoint_bind(struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
int rc;
|
|
/* close the existing socket, if any */
|
|
osmo_pfcp_endpoint_close(ep);
|
|
|
|
if (!ep->cfg.rx_msg_cb) {
|
|
LOGP(DLPFCP, LOGL_ERROR, "missing cfg.rx_msg_cb at osmo_pfcp_endpoint\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* create the new socket, binding to configured local address */
|
|
ep->pfcp_fd.cb = osmo_pfcp_fd_cb;
|
|
ep->pfcp_fd.data = ep;
|
|
rc = osmo_sock_init_osa_ofd(&ep->pfcp_fd, SOCK_DGRAM, IPPROTO_UDP, &ep->cfg.local_addr, NULL, OSMO_SOCK_F_BIND);
|
|
if (rc < 0)
|
|
return rc;
|
|
return 0;
|
|
}
|
|
|
|
void osmo_pfcp_endpoint_close(struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
struct osmo_pfcp_queue_entry *qe;
|
|
while ((qe = llist_first_entry_or_null(&ep->sent_requests, struct osmo_pfcp_queue_entry, entry)))
|
|
osmo_pfcp_queue_del(qe);
|
|
while ((qe = llist_first_entry_or_null(&ep->sent_responses, struct osmo_pfcp_queue_entry, entry)))
|
|
osmo_pfcp_queue_del(qe);
|
|
|
|
if (ep->pfcp_fd.fd != -1) {
|
|
osmo_fd_unregister(&ep->pfcp_fd);
|
|
close(ep->pfcp_fd.fd);
|
|
ep->pfcp_fd.fd = -1;
|
|
}
|
|
}
|
|
|
|
void osmo_pfcp_endpoint_free(struct osmo_pfcp_endpoint **ep)
|
|
{
|
|
if (!*ep)
|
|
return;
|
|
osmo_pfcp_endpoint_close(*ep);
|
|
talloc_free(*ep);
|
|
*ep = NULL;
|
|
}
|
|
|
|
/* Call osmo_pfcp_msg_invalidate_ctx(deleted_fi) on all queued osmo_pfcp_msg instances in the retrans_queue. */
|
|
void osmo_pfcp_endpoint_invalidate_ctx(struct osmo_pfcp_endpoint *ep, struct osmo_fsm_inst *deleted_fi)
|
|
{
|
|
struct osmo_pfcp_queue_entry *qe;
|
|
llist_for_each_entry(qe, &ep->sent_requests, entry)
|
|
osmo_pfcp_msg_invalidate_ctx(qe->m, deleted_fi);
|
|
llist_for_each_entry(qe, &ep->sent_responses, entry)
|
|
osmo_pfcp_msg_invalidate_ctx(qe->m, deleted_fi);
|
|
}
|
|
|
|
/* Return the cfg for an endpoint, guaranteed to return non-NULL for a valid ep. */
|
|
const struct osmo_pfcp_endpoint_cfg *osmo_pfcp_endpoint_get_cfg(const struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
return &ep->cfg;
|
|
}
|
|
|
|
/* Shorthand for &osmo_pfcp_endpoint_get_cfg(ep)->priv */
|
|
void *osmo_pfcp_endpoint_get_priv(const struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
return ep->cfg.priv;
|
|
}
|
|
|
|
uint32_t osmo_pfcp_endpoint_get_recovery_timestamp(const struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
return ep->recovery_time_stamp;
|
|
}
|
|
|
|
/* Shorthand for &osmo_pfcp_endpoint_get_cfg(ep)->local_addr */
|
|
const struct osmo_sockaddr *osmo_pfcp_endpoint_get_local_addr(const struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
return &ep->cfg.local_addr;
|
|
}
|
|
|
|
void osmo_pfcp_endpoint_set_seq_nr_state(struct osmo_pfcp_endpoint *ep, uint32_t seq_nr_state)
|
|
{
|
|
ep->seq_nr_state = seq_nr_state;
|
|
}
|
|
|
|
/* Return true when the retransmission queues contain any PFCP messages, false when the queues are empty. */
|
|
bool osmo_pfcp_endpoint_retrans_queue_is_busy(const struct osmo_pfcp_endpoint *ep)
|
|
{
|
|
return !(llist_empty(&ep->sent_requests) && llist_empty(&ep->sent_responses));
|
|
}
|