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Diffstat (limited to 'src/ipcpd/normal/connmgr.c')
-rw-r--r--src/ipcpd/normal/connmgr.c525
1 files changed, 0 insertions, 525 deletions
diff --git a/src/ipcpd/normal/connmgr.c b/src/ipcpd/normal/connmgr.c
deleted file mode 100644
index 7c1280c3..00000000
--- a/src/ipcpd/normal/connmgr.c
+++ /dev/null
@@ -1,525 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2019
- *
- * Handles connections between components
- *
- * Dimitri Staessens <dimitri.staessens@ugent.be>
- * Sander Vrijders <sander.vrijders@ugent.be>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#if defined(__linux__) || defined(__CYGWIN__)
-#define _DEFAULT_SOURCE
-#else
-#define _POSIX_C_SOURCE 200112L
-#endif
-
-#define OUROBOROS_PREFIX "connection-manager"
-
-#include <ouroboros/dev.h>
-#include <ouroboros/cacep.h>
-#include <ouroboros/errno.h>
-#include <ouroboros/list.h>
-#include <ouroboros/logs.h>
-#include <ouroboros/notifier.h>
-
-#include "comp.h"
-#include "connmgr.h"
-#include "dir.h"
-#include "enroll.h"
-#include "ipcp.h"
-
-#include <pthread.h>
-#include <string.h>
-#include <stdlib.h>
-#include <assert.h>
-
-enum connmgr_state {
- CONNMGR_NULL = 0,
- CONNMGR_INIT,
- CONNMGR_RUNNING
-};
-
-struct conn_el {
- struct list_head next;
- struct conn conn;
-};
-
-struct comp {
- struct conn_info info;
-
- struct list_head conns;
- struct list_head pending;
-
- pthread_cond_t cond;
- pthread_mutex_t lock;
-};
-
-struct {
- struct comp comps[COMPID_MAX];
- enum connmgr_state state;
-
- pthread_t acceptor;
-} connmgr;
-
-static int get_id_by_name(const char * name)
-{
- enum comp_id i;
-
- for (i = 0; i < COMPID_MAX; ++i)
- if (strcmp(name, connmgr.comps[i].info.comp_name) == 0)
- return i;
-
- return -1;
-}
-
-static int get_conn_by_fd(int fd,
- enum comp_id id,
- struct conn * conn)
-{
- struct list_head * p;
-
- pthread_mutex_lock(&connmgr.comps[id].lock);
-
- list_for_each(p, &connmgr.comps[id].conns) {
- struct conn_el * c =
- list_entry(p, struct conn_el, next);
- if (c->conn.flow_info.fd == fd) {
- *conn = c->conn;
- pthread_mutex_unlock(&connmgr.comps[id].lock);
- return 0;
- }
- }
-
- pthread_mutex_unlock(&connmgr.comps[id].lock);
-
- return -1;
-}
-
-static int add_comp_conn(enum comp_id id,
- int fd,
- qosspec_t qs,
- struct conn_info * rcv_info)
-{
- struct conn_el * el;
-
- el = malloc(sizeof(*el));
- if (el == NULL) {
- log_err("Not enough memory.");
- return -1;
- }
-
- el->conn.conn_info = *rcv_info;
- el->conn.flow_info.fd = fd;
- el->conn.flow_info.qs = qs;
-
- pthread_mutex_lock(&connmgr.comps[id].lock);
-
- list_add(&el->next, &connmgr.comps[id].pending);
- pthread_cond_signal(&connmgr.comps[id].cond);
-
- pthread_mutex_unlock(&connmgr.comps[id].lock);
-
- return 0;
-}
-
-static void * flow_acceptor(void * o)
-{
- int fd;
- qosspec_t qs;
- struct conn_info rcv_info;
- struct conn_info fail_info;
-
- (void) o;
-
- memset(&fail_info, 0, sizeof(fail_info));
-
- while (true) {
- int id;
-
- fd = flow_accept(&qs, NULL);
- if (fd < 0) {
- if (fd != -EIRMD)
- log_warn("Flow accept failed: %d", fd);
- continue;
- }
-
- if (cacep_rcv(fd, &rcv_info)) {
- log_dbg("Error establishing application connection.");
- flow_dealloc(fd);
- continue;
- }
-
- id = get_id_by_name(rcv_info.comp_name);
- if (id < 0) {
- log_dbg("Connection request for unknown component %s.",
- rcv_info.comp_name);
- cacep_snd(fd, &fail_info);
- flow_dealloc(fd);
- continue;
- }
-
- assert(id < COMPID_MAX);
-
- if (cacep_snd(fd, &connmgr.comps[id].info)) {
- log_dbg("Failed to respond to request.");
- flow_dealloc(fd);
- continue;
- }
-
- if (add_comp_conn(id, fd, qs, &rcv_info)) {
- log_dbg("Failed to add new connection.");
- flow_dealloc(fd);
- continue;
- }
- }
-
- return (void *) 0;
-}
-
-static void handle_event(void * self,
- int event,
- const void * o)
-{
- struct conn conn;
-
- (void) self;
-
- if (!(event == NOTIFY_DT_FLOW_UP ||
- event == NOTIFY_DT_FLOW_DOWN ||
- event == NOTIFY_DT_FLOW_DEALLOC))
- return;
-
- if (get_conn_by_fd(*((int *) o), COMPID_DT, &conn))
- return;
-
- switch (event) {
- case NOTIFY_DT_FLOW_UP:
- notifier_event(NOTIFY_DT_CONN_UP, &conn);
- break;
- case NOTIFY_DT_FLOW_DOWN:
- notifier_event(NOTIFY_DT_CONN_DOWN, &conn);
- break;
- case NOTIFY_DT_FLOW_DEALLOC:
- notifier_event(NOTIFY_DT_CONN_DEL, &conn);
- break;
- default:
- break;
- }
-}
-
-int connmgr_init(void)
-{
- connmgr.state = CONNMGR_INIT;
-
- if (notifier_reg(handle_event, NULL))
- return -1;
-
- return 0;
-}
-
-void connmgr_fini(void)
-{
- int i;
-
- notifier_unreg(handle_event);
-
- if (connmgr.state == CONNMGR_RUNNING)
- pthread_join(connmgr.acceptor, NULL);
-
- for (i = 0; i < COMPID_MAX; ++i)
- connmgr_comp_fini(i);
-}
-
-int connmgr_start(void)
-{
- if (pthread_create(&connmgr.acceptor, NULL, flow_acceptor, NULL))
- return -1;
-
- connmgr.state = CONNMGR_RUNNING;
-
- return 0;
-}
-
-void connmgr_stop(void)
-{
- if (connmgr.state == CONNMGR_RUNNING)
- pthread_cancel(connmgr.acceptor);
-}
-
-int connmgr_comp_init(enum comp_id id,
- const struct conn_info * info)
-{
- struct comp * comp;
-
- assert(id >= 0 && id < COMPID_MAX);
-
- comp = connmgr.comps + id;
-
- if (pthread_mutex_init(&comp->lock, NULL))
- return -1;
-
- if (pthread_cond_init(&comp->cond, NULL)) {
- pthread_mutex_destroy(&comp->lock);
- return -1;
- }
-
- list_head_init(&comp->conns);
- list_head_init(&comp->pending);
-
- memcpy(&connmgr.comps[id].info, info, sizeof(connmgr.comps[id].info));
-
- return 0;
-}
-
-void connmgr_comp_fini(enum comp_id id)
-{
- struct list_head * p;
- struct list_head * h;
- struct comp * comp;
-
- assert(id >= 0 && id < COMPID_MAX);
-
- if (strlen(connmgr.comps[id].info.comp_name) == 0)
- return;
-
- comp = connmgr.comps + id;
-
- pthread_mutex_lock(&comp->lock);
-
- list_for_each_safe(p, h, &comp->conns) {
- struct conn_el * e = list_entry(p, struct conn_el, next);
- list_del(&e->next);
- free(e);
- }
-
- list_for_each_safe(p, h, &comp->pending) {
- struct conn_el * e = list_entry(p, struct conn_el, next);
- list_del(&e->next);
- free(e);
- }
-
- pthread_mutex_unlock(&comp->lock);
-
- pthread_cond_destroy(&comp->cond);
- pthread_mutex_destroy(&comp->lock);
-
- memset(&connmgr.comps[id].info, 0, sizeof(connmgr.comps[id].info));
-}
-
-int connmgr_ipcp_connect(const char * dst,
- const char * component,
- qosspec_t qs)
-{
- struct conn_el * ce;
- int id;
-
- assert(dst);
- assert(component);
-
- ce = malloc(sizeof(*ce));
- if (ce == NULL) {
- log_dbg("Out of memory.");
- return -1;
- }
-
- id = get_id_by_name(component);
- if (id < 0) {
- log_dbg("No such component: %s", component);
- free(ce);
- return -1;
- }
-
- if (connmgr_alloc(id, dst, &qs, &ce->conn)) {
- free(ce);
- return -1;
- }
-
- if (strlen(dst) > DST_MAX_STRLEN) {
- log_warn("Truncating dst length for connection.");
- memcpy(ce->conn.flow_info.dst, dst, DST_MAX_STRLEN);
- ce->conn.flow_info.dst[DST_MAX_STRLEN] = '\0';
- } else {
- strcpy(ce->conn.flow_info.dst, dst);
- }
-
- pthread_mutex_lock(&connmgr.comps[id].lock);
-
- list_add(&ce->next, &connmgr.comps[id].conns);
-
- pthread_mutex_unlock(&connmgr.comps[id].lock);
-
- return 0;
-}
-
-int connmgr_ipcp_disconnect(const char * dst,
- const char * component)
-{
- struct list_head * p;
- struct list_head * h;
- int id;
-
- assert(dst);
- assert(component);
-
- id = get_id_by_name(component);
- if (id < 0)
- return -1;
-
- pthread_mutex_lock(&connmgr.comps[id].lock);
-
- list_for_each_safe(p,h, &connmgr.comps[id].conns) {
- struct conn_el * el = list_entry(p, struct conn_el, next);
- if (strcmp(el->conn.flow_info.dst, dst) == 0) {
- int ret;
- pthread_mutex_unlock(&connmgr.comps[id].lock);
- list_del(&el->next);
- ret = connmgr_dealloc(id, &el->conn);
- free(el);
- return ret;
- }
- }
-
- pthread_mutex_unlock(&connmgr.comps[id].lock);
-
- return 0;
-}
-
-int connmgr_alloc(enum comp_id id,
- const char * dst,
- qosspec_t * qs,
- struct conn * conn)
-{
- assert(id >= 0 && id < COMPID_MAX);
- assert(dst);
-
- conn->flow_info.fd = flow_alloc(dst, qs, NULL);
- if (conn->flow_info.fd < 0) {
- log_dbg("Failed to allocate flow to %s.", dst);
- return -1;
- }
-
- if (qs != NULL)
- conn->flow_info.qs = *qs;
- else
- memset(&conn->flow_info.qs, 0, sizeof(conn->flow_info.qs));
-
- log_dbg("Sending cacep info for protocol %s to fd %d.",
- connmgr.comps[id].info.protocol, conn->flow_info.fd);
-
- if (cacep_snd(conn->flow_info.fd, &connmgr.comps[id].info)) {
- log_dbg("Failed to create application connection.");
- flow_dealloc(conn->flow_info.fd);
- return -1;
- }
-
- if (cacep_rcv(conn->flow_info.fd, &conn->conn_info)) {
- log_dbg("Failed to connect to application.");
- flow_dealloc(conn->flow_info.fd);
- return -1;
- }
-
- if (strcmp(connmgr.comps[id].info.protocol, conn->conn_info.protocol)) {
- log_dbg("Unknown protocol (requested %s, got %s).",
- connmgr.comps[id].info.protocol,
- conn->conn_info.protocol);
- flow_dealloc(conn->flow_info.fd);
- return -1;
- }
-
- if (connmgr.comps[id].info.pref_version !=
- conn->conn_info.pref_version) {
- log_dbg("Unknown protocol version.");
- flow_dealloc(conn->flow_info.fd);
- return -1;
- }
-
- if (connmgr.comps[id].info.pref_syntax != conn->conn_info.pref_syntax) {
- log_dbg("Unknown protocol syntax.");
- flow_dealloc(conn->flow_info.fd);
- return -1;
- }
-
- switch (id) {
- case COMPID_DT:
- notifier_event(NOTIFY_DT_CONN_ADD, conn);
-#ifdef IPCP_CONN_WAIT_DIR
- dir_wait_running();
-#endif
- break;
- case COMPID_MGMT:
- notifier_event(NOTIFY_MGMT_CONN_ADD, conn);
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-int connmgr_dealloc(enum comp_id id,
- struct conn * conn)
-{
- switch (id) {
- case COMPID_DT:
- notifier_event(NOTIFY_DT_CONN_DEL, conn);
- break;
- case COMPID_MGMT:
- notifier_event(NOTIFY_MGMT_CONN_DEL, conn);
- break;
- default:
- break;
- }
-
- return flow_dealloc(conn->flow_info.fd);
-}
-
-
-int connmgr_wait(enum comp_id id,
- struct conn * conn)
-{
- struct conn_el * el;
- struct comp * comp;
-
- assert(id >= 0 && id < COMPID_MAX);
- assert(conn);
-
- comp = connmgr.comps + id;
-
- pthread_mutex_lock(&comp->lock);
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) &comp->lock);
-
- while (list_is_empty(&comp->pending))
- pthread_cond_wait(&comp->cond, &comp->lock);
-
- pthread_cleanup_pop(false);
-
- el = list_first_entry((&comp->pending), struct conn_el, next);
- if (el == NULL) {
- pthread_mutex_unlock(&comp->lock);
- return -1;
- }
-
- *conn = el->conn;
-
- list_del(&el->next);
- list_add(&el->next, &connmgr.comps[id].conns);
-
- pthread_mutex_unlock(&comp->lock);
-
- return 0;
-}
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