This adds a broadcast IPCP that allows us to easily create multicast
applications. The broadcast IPCP accepts flows for "<layer_name>.mc".
A tool, obc (Ouroboros broadcast), is added that sends and reads a
message to a broadcast layer.
Signed-off-by: Dimitri Staessens <dimitri.staessens@xxxxxxxx>
---
include/ouroboros/ipcp.h | 1 +
src/ipcpd/CMakeLists.txt | 1 +
src/ipcpd/broadcast/CMakeLists.txt | 34 ++
src/ipcpd/broadcast/comp.h | 46 +++
src/ipcpd/broadcast/connmgr.c | 521 +++++++++++++++++++++++++++++
src/ipcpd/broadcast/connmgr.h | 74 ++++
src/ipcpd/broadcast/dt.c | 318 ++++++++++++++++++
src/ipcpd/broadcast/dt.h | 27 ++
src/ipcpd/broadcast/enroll.c | 363 ++++++++++++++++++++
src/ipcpd/broadcast/enroll.h | 47 +++
src/ipcpd/broadcast/main.c | 359 ++++++++++++++++++++
src/ipcpd/ipcp.c | 10 +-
src/irmd/config.h.in | 1 +
src/irmd/ipcp.c | 3 +
src/irmd/main.c | 2 +-
src/lib/irm.c | 1 +
src/tools/CMakeLists.txt | 1 +
src/tools/irm/irm_ipcp_bootstrap.c | 16 +-
src/tools/irm/irm_ipcp_create.c | 17 +-
src/tools/irm/irm_ipcp_enroll.c | 37 +-
src/tools/obc/CMakeLists.txt | 16 +
src/tools/obc/obc.c | 153 +++++++++
22 files changed, 2023 insertions(+), 25 deletions(-)
create mode 100644 src/ipcpd/broadcast/CMakeLists.txt
create mode 100644 src/ipcpd/broadcast/comp.h
create mode 100644 src/ipcpd/broadcast/connmgr.c
create mode 100644 src/ipcpd/broadcast/connmgr.h
create mode 100644 src/ipcpd/broadcast/dt.c
create mode 100644 src/ipcpd/broadcast/dt.h
create mode 100644 src/ipcpd/broadcast/enroll.c
create mode 100644 src/ipcpd/broadcast/enroll.h
create mode 100644 src/ipcpd/broadcast/main.c
create mode 100644 src/tools/obc/CMakeLists.txt
create mode 100644 src/tools/obc/obc.c
diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index e423a01..4445c2c 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -36,6 +36,7 @@
enum ipcp_type {
IPCP_LOCAL = 0,
IPCP_NORMAL,
+ IPCP_BROADCAST,
IPCP_RAPTOR,
IPCP_ETH_LLC,
IPCP_ETH_DIX,
diff --git a/src/ipcpd/CMakeLists.txt b/src/ipcpd/CMakeLists.txt
index 1c6f6ae..5c109b4 100644
--- a/src/ipcpd/CMakeLists.txt
+++ b/src/ipcpd/CMakeLists.txt
@@ -40,6 +40,7 @@ set(IPCP_SOURCES
${CMAKE_CURRENT_SOURCE_DIR}/shim-data.c
)
+add_subdirectory(broadcast)
add_subdirectory(local)
add_subdirectory(normal)
add_subdirectory(raptor)
diff --git a/src/ipcpd/broadcast/CMakeLists.txt
b/src/ipcpd/broadcast/CMakeLists.txt
new file mode 100644
index 0000000..afcc869
--- /dev/null
+++ b/src/ipcpd/broadcast/CMakeLists.txt
@@ -0,0 +1,34 @@
+get_filename_component(CURRENT_SOURCE_PARENT_DIR
+ ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(CURRENT_BINARY_PARENT_DIR
+ ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${CURRENT_SOURCE_PARENT_DIR})
+include_directories(${CURRENT_BINARY_PARENT_DIR})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+set(IPCP_BROADCAST_TARGET ipcpd-broadcast CACHE INTERNAL "")
+
+set(SOURCE_FILES
+ # Add source files here
+ connmgr.c
+ dt.c
+ enroll.c
+ main.c
+ )
+
+add_executable(ipcpd-broadcast ${SOURCE_FILES} ${IPCP_SOURCES}
+ ${LAYER_CONFIG_PROTO_SRCS})
+target_link_libraries(ipcpd-broadcast LINK_PUBLIC ouroboros-dev)
+
+include(AddCompileFlags)
+if (CMAKE_BUILD_TYPE MATCHES "Debug*")
+ add_compile_flags(ipcpd-broadcast -DCONFIG_OUROBOROS_DEBUG)
+endif ()
+
+install(TARGETS ipcpd-broadcast RUNTIME DESTINATION ${CMAKE_INSTALL_SBINDIR})
diff --git a/src/ipcpd/broadcast/comp.h b/src/ipcpd/broadcast/comp.h
new file mode 100644
index 0000000..9c883e7
--- /dev/null
+++ b/src/ipcpd/broadcast/comp.h
@@ -0,0 +1,46 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Components for the normal IPC process
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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/.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_COMP_H
+#define OUROBOROS_IPCPD_NORMAL_COMP_H
+
+#include <ouroboros/cacep.h>
+
+#define DST_MAX_STRLEN 64
+
+enum comp_id {
+ COMPID_DT = 0,
+ COMPID_ENROLL,
+ COMPID_MGMT,
+ COMPID_MAX
+};
+
+struct conn {
+ struct conn_info conn_info;
+ struct {
+ char dst[DST_MAX_STRLEN + 1];
+ int fd;
+ qosspec_t qs;
+ } flow_info;
+};
+
+#endif /* OUROBOROS_IPCPD_NORMAL_COMP_H */
diff --git a/src/ipcpd/broadcast/connmgr.c b/src/ipcpd/broadcast/connmgr.c
new file mode 100644
index 0000000..dee88e0
--- /dev/null
+++ b/src/ipcpd/broadcast/connmgr.c
@@ -0,0 +1,521 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Handles connections between components
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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 "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);
+ 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;
+}
diff --git a/src/ipcpd/broadcast/connmgr.h b/src/ipcpd/broadcast/connmgr.h
new file mode 100644
index 0000000..f767e72
--- /dev/null
+++ b/src/ipcpd/broadcast/connmgr.h
@@ -0,0 +1,74 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Handles the different AP connections
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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/.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_CONNMGR_H
+#define OUROBOROS_IPCPD_NORMAL_CONNMGR_H
+
+#include <ouroboros/cacep.h>
+#include <ouroboros/qos.h>
+
+#include "comp.h"
+
+#define NOTIFY_DT_CONN_ADD 0x00D0
+#define NOTIFY_DT_CONN_DEL 0x00D1
+#define NOTIFY_DT_CONN_QOS 0x00D2
+#define NOTIFY_DT_CONN_UP 0x00D3
+#define NOTIFY_DT_CONN_DOWN 0x00D4
+#define NOTIFY_DT_FLOW_UP 0x00D5
+#define NOTIFY_DT_FLOW_DOWN 0x00D6
+#define NOTIFY_DT_FLOW_DEALLOC 0x00D7
+
+#define NOTIFY_MGMT_CONN_ADD 0x00F0
+#define NOTIFY_MGMT_CONN_DEL 0x00F1
+
+int connmgr_init(void);
+
+void connmgr_fini(void);
+
+int connmgr_start(void);
+
+void connmgr_stop(void);
+
+int connmgr_comp_init(enum comp_id id,
+ const struct conn_info * info);
+
+void connmgr_comp_fini(enum comp_id id);
+
+int connmgr_ipcp_connect(const char * dst,
+ const char * component,
+ qosspec_t qs);
+
+int connmgr_ipcp_disconnect(const char * dst,
+ const char * component);
+
+int connmgr_alloc(enum comp_id id,
+ const char * dst,
+ qosspec_t * qs,
+ struct conn * conn);
+
+int connmgr_dealloc(enum comp_id id,
+ struct conn * conn);
+
+int connmgr_wait(enum comp_id id,
+ struct conn * conn);
+
+#endif /* OUROBOROS_IPCPD_NORMAL_CONNMGR_H */
diff --git a/src/ipcpd/broadcast/dt.c b/src/ipcpd/broadcast/dt.c
new file mode 100644
index 0000000..948d66e
--- /dev/null
+++ b/src/ipcpd/broadcast/dt.c
@@ -0,0 +1,318 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Forward loop for broadcast
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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
+
+#include "config.h"
+
+#define BROADCAST_MTU 1400 /* FIXME: avoid packet copy. */
+
+#define DT "dt"
+#define OUROBOROS_PREFIX DT
+
+#include <ouroboros/endian.h>
+#include <ouroboros/dev.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/fqueue.h>
+#include <ouroboros/list.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/notifier.h>
+#include <ouroboros/utils.h>
+
+#include "comp.h"
+#include "connmgr.h"
+#include "dt.h"
+#include "ipcp.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <string.h>
+#include <pthread.h>
+
+struct nb {
+ struct list_head next;
+
+ int fd;
+};
+
+struct {
+ struct list_head nbs;
+ size_t nbs_len;
+ pthread_rwlock_t nbs_lock;
+
+ fset_t * set;
+
+ pthread_t reader;
+ pthread_t listener;
+} fwd;
+
+static int dt_add_nb(int fd)
+{
+ struct list_head * p;
+ struct nb * nb;
+
+ pthread_rwlock_wrlock(&fwd.nbs_lock);
+
+ list_for_each(p, &fwd.nbs) {
+ struct nb * el = list_entry(p, struct nb, next);
+ if (el->fd == fd) {
+ log_dbg("Already know neighbor.");
+ pthread_rwlock_unlock(&fwd.nbs_lock);
+ return -EPERM;
+ }
+ }
+
+ nb = malloc(sizeof(*nb));
+ if (nb == NULL) {
+ pthread_rwlock_unlock(&fwd.nbs_lock);
+ return -ENOMEM;
+ }
+
+ nb->fd = fd;
+
+ list_add_tail(&nb->next, p);
+
+ ++fwd.nbs_len;
+
+ log_dbg("Neighbor %d added.", fd);
+
+ pthread_rwlock_unlock(&fwd.nbs_lock);
+
+ return 0;
+}
+
+static int dt_del_nb(int fd)
+{
+ struct list_head * p;
+ struct list_head * h;
+
+ pthread_rwlock_wrlock(&fwd.nbs_lock);
+
+ list_for_each_safe(p, h, &fwd.nbs) {
+ struct nb * nb = list_entry(p, struct nb, next);
+ if (nb->fd == fd) {
+ list_del(&nb->next);
+ --fwd.nbs_len;
+ pthread_rwlock_unlock(&fwd.nbs_lock);
+ log_dbg("Neighbor %d deleted.", nb->fd);
+ free(nb);
+ return 0;
+ }
+ }
+
+ pthread_rwlock_unlock(&fwd.nbs_lock);
+
+ return -EPERM;
+}
+
+static void * dt_conn_handle(void * o)
+{
+ struct conn conn;
+
+ (void) o;
+
+ while (true) {
+ if (connmgr_wait(COMPID_DT, &conn)) {
+ log_err("Failed to get next DT connection.");
+ continue;
+ }
+
+ /* NOTE: connection acceptance policy could be here. */
+
+ notifier_event(NOTIFY_DT_CONN_ADD, &conn);
+ }
+
+ return 0;
+}
+
+
+static void dt_packet(uint8_t * buf,
+ size_t len,
+ int in_fd)
+{
+ struct list_head * p;
+
+ pthread_rwlock_rdlock(&fwd.nbs_lock);
+
+ pthread_cleanup_push((void (*))(void *) pthread_rwlock_unlock,
+ &fwd.nbs_lock);
+
+ list_for_each(p, &fwd.nbs) {
+ struct nb * nb = list_entry(p, struct nb, next);
+ if (nb->fd != in_fd)
+ flow_write(nb->fd, buf, len); /* FIXME: avoid copy. */
+ }
+
+ pthread_cleanup_pop(true);
+}
+
+static void * dt_reader(void * o)
+{
+ fqueue_t * fq;
+ int ret;
+ uint8_t buf[BROADCAST_MTU];
+ int fd;
+ ssize_t len;
+
+ (void) o;
+
+ fq = fqueue_create();
+ if (fq == NULL)
+ return (void *) -1;
+
+ pthread_cleanup_push((void (*) (void *)) fqueue_destroy,
+ (void *) fq);
+
+ while (true) {
+ ret = fevent(fwd.set, fq, NULL);
+ if (ret < 0) {
+ log_warn("Event error: %d.", ret);
+ continue;
+ }
+
+ while ((fd = fqueue_next(fq)) >= 0) {
+ if (fqueue_type(fq) != FLOW_PKT)
+ continue;
+
+ /* FIXME: avoid copy. */
+ len = flow_read(fd, buf, BROADCAST_MTU);
+ if (len < 0)
+ continue;
+
+ dt_packet(buf, len, fd);
+ }
+ }
+
+ pthread_cleanup_pop(true);
+
+ return (void *) 0;
+}
+
+static void handle_event(void * self,
+ int event,
+ const void * o)
+{
+ /* FIXME: Apply correct QoS on graph */
+ struct conn * c;
+
+ (void) self;
+
+ c = (struct conn *) o;
+
+ switch (event) {
+ case NOTIFY_DT_CONN_ADD:
+ if (dt_add_nb(c->flow_info.fd))
+ log_dbg("Failed to add neighbor.");
+ fset_add(fwd.set, c->flow_info.fd);
+ break;
+ case NOTIFY_DT_CONN_DEL:
+ if (dt_del_nb(c->flow_info.fd))
+ log_dbg("Failed to delete neighbor.");
+ fset_del(fwd.set, c->flow_info.fd);
+ break;
+ default:
+ break;
+ }
+}
+
+int dt_init(void)
+{
+ struct conn_info info;
+
+ memset(&info, 0, sizeof(info));
+
+ strcpy(info.comp_name, DT);
+ strcpy(info.comp_name, DT_COMP);
+
+ list_head_init(&fwd.nbs);
+
+ if (notifier_reg(handle_event, NULL))
+ goto fail_notifier_reg;
+
+ if (pthread_rwlock_init(&fwd.nbs_lock, NULL))
+ goto fail_lock_init;
+
+ fwd.set = fset_create();
+ if (fwd.set == NULL)
+ goto fail_fset_create;
+
+ if (pthread_create(&fwd.reader, NULL, dt_reader, NULL))
+ goto fail_pthread_create_reader;
+
+ if (pthread_create(&fwd.listener, NULL, dt_conn_handle, NULL))
+ goto fail_pthread_create_listener;
+
+ if (connmgr_comp_init(COMPID_DT, &info))
+ goto fail_connmgr_comp_init;
+
+ fwd.nbs_len = 0;
+
+ return 0;
+
+ fail_connmgr_comp_init:
+ pthread_cancel(fwd.listener);
+ pthread_join(fwd.listener, NULL);
+ fail_pthread_create_listener:
+ pthread_cancel(fwd.reader);
+ pthread_join(fwd.reader, NULL);
+ fail_pthread_create_reader:
+ fset_destroy(fwd.set);
+ fail_fset_create:
+ pthread_rwlock_destroy(&fwd.nbs_lock);
+ fail_lock_init:
+ notifier_unreg(handle_event);
+ fail_notifier_reg:
+ return -1;
+}
+
+void dt_fini(void)
+{
+ struct list_head * p;
+ struct list_head * h;
+
+ notifier_unreg(handle_event);
+
+ pthread_cancel(fwd.reader);
+ pthread_cancel(fwd.listener);
+
+ pthread_join(fwd.reader, NULL);
+ pthread_join(fwd.listener, NULL);
+
+ fset_destroy(fwd.set);
+
+ pthread_rwlock_wrlock(&fwd.nbs_lock);
+
+ list_for_each_safe(p, h, &fwd.nbs) {
+ struct nb * n = list_entry(p, struct nb, next);
+ list_del(&n->next);
+ free(n);
+ }
+
+ pthread_rwlock_unlock(&fwd.nbs_lock);
+
+ pthread_rwlock_destroy(&fwd.nbs_lock);
+}
diff --git a/src/ipcpd/broadcast/dt.h b/src/ipcpd/broadcast/dt.h
new file mode 100644
index 0000000..853ce03
--- /dev/null
+++ b/src/ipcpd/broadcast/dt.h
@@ -0,0 +1,27 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Forward loop for broadcast
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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/.
+ */
+
+#define DT_COMP "Data Transfer"
+
+int dt_init(void);
+
+void dt_fini(void);
diff --git a/src/ipcpd/broadcast/enroll.c b/src/ipcpd/broadcast/enroll.c
new file mode 100644
index 0000000..6671949
--- /dev/null
+++ b/src/ipcpd/broadcast/enroll.c
@@ -0,0 +1,363 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Enrollment Task
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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 199309L
+#endif
+
+#define OUROBOROS_PREFIX "enrollment"
+
+#include <ouroboros/endian.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/time_utils.h>
+#include <ouroboros/dev.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/sockets.h>
+
+#include "connmgr.h"
+#include "enroll.h"
+#include "ipcp.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "ipcp_config.pb-c.h"
+typedef EnrollMsg enroll_msg_t;
+
+#define ENROLL_COMP "Enrollment"
+#define ENROLL_PROTO "OEP" /* Ouroboros enrollment protocol */
+#define ENROLL_WARN_TIME_OFFSET 20
+#define ENROLL_BUF_LEN 1024
+
+enum enroll_state {
+ ENROLL_NULL = 0,
+ ENROLL_INIT,
+ ENROLL_RUNNING
+};
+
+struct {
+ struct ipcp_config conf;
+ enum enroll_state state;
+ pthread_t listener;
+} enroll;
+
+static int send_rcv_enroll_msg(int fd)
+{
+ enroll_msg_t req = ENROLL_MSG__INIT;
+ enroll_msg_t * reply;
+ uint8_t buf[ENROLL_BUF_LEN];
+ ssize_t len;
+ ssize_t delta_t;
+ struct timespec t0;
+ struct timespec rtt;
+
+ req.code = ENROLL_CODE__ENROLL_REQ;
+
+ len = enroll_msg__get_packed_size(&req);
+ if (len < 0) {
+ log_dbg("Failed pack request message.");
+ return -1;
+ }
+
+ enroll_msg__pack(&req, buf);
+
+ clock_gettime(CLOCK_REALTIME, &t0);
+
+ if (flow_write(fd, buf, len)) {
+ log_dbg("Failed to send request message.");
+ return -1;
+ }
+
+ len = flow_read(fd, buf, ENROLL_BUF_LEN);
+ if (len < 0) {
+ log_dbg("No enrollment reply received.");
+ return -1;
+ }
+
+ log_dbg("Received enrollment info (%zd bytes).", len);
+
+ reply = enroll_msg__unpack(NULL, len, buf);
+ if (reply == NULL) {
+ log_dbg("No enrollment response.");
+ return -1;
+ }
+
+ if (reply->code != ENROLL_CODE__ENROLL_BOOT) {
+ log_dbg("Failed to unpack enrollment response.");
+ enroll_msg__free_unpacked(reply, NULL);
+ return -1;
+ }
+
+ if (!(reply->has_t_sec && reply->has_t_nsec)) {
+ log_dbg("No time in response message.");
+ enroll_msg__free_unpacked(reply, NULL);
+ return -1;
+ }
+
+ clock_gettime(CLOCK_REALTIME, &rtt);
+
+ delta_t = ts_diff_ms(&t0, &rtt);
+
+ rtt.tv_sec = reply->t_sec;
+ rtt.tv_nsec = reply->t_nsec;
+
+ if (labs(ts_diff_ms(&t0, &rtt)) - delta_t > ENROLL_WARN_TIME_OFFSET)
+ log_warn("Clock offset above threshold.");
+
+ strcpy(enroll.conf.layer_info.layer_name,
+ reply->conf->layer_info->layer_name);
+ enroll.conf.layer_info.dir_hash_algo
+ = reply->conf->layer_info->dir_hash_algo;
+
+ enroll_msg__free_unpacked(reply, NULL);
+
+ return 0;
+}
+
+static ssize_t enroll_pack(uint8_t ** buf)
+{
+ enroll_msg_t msg = ENROLL_MSG__INIT;
+ ipcp_config_msg_t config = IPCP_CONFIG_MSG__INIT;
+ layer_info_msg_t layer_info = LAYER_INFO_MSG__INIT;
+ struct timespec now;
+ ssize_t len;
+
+ clock_gettime(CLOCK_REALTIME, &now);
+
+ msg.code = ENROLL_CODE__ENROLL_BOOT;
+ msg.has_t_sec = true;
+ msg.t_sec = now.tv_sec;
+ msg.has_t_nsec = true;
+ msg.t_nsec = now.tv_nsec;
+ msg.conf = &config;
+
+ config.ipcp_type = enroll.conf.type;
+ config.layer_info = &layer_info;
+
+ layer_info.layer_name = (char *) enroll.conf.layer_info.layer_name;
+ layer_info.dir_hash_algo = enroll.conf.layer_info.dir_hash_algo;
+
+ len = enroll_msg__get_packed_size(&msg);
+
+ *buf = malloc(len);
+ if (*buf == NULL)
+ return -1;
+
+ enroll_msg__pack(&msg, *buf);
+
+ return len;
+}
+
+static void * enroll_handle(void * o)
+{
+ struct conn conn;
+ uint8_t buf[ENROLL_BUF_LEN];
+ uint8_t * reply;
+ ssize_t len;
+ enroll_msg_t * msg;
+
+ (void) o;
+
+ while (true) {
+ if (connmgr_wait(COMPID_ENROLL, &conn)) {
+ log_err("Failed to get next connection.");
+ continue;
+ }
+
+ len = flow_read(conn.flow_info.fd, buf, ENROLL_BUF_LEN);
+ if (len < 0) {
+ log_err("Failed to read from flow.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ continue;
+ }
+
+ msg = enroll_msg__unpack(NULL, len, buf);
+ if (msg == NULL) {
+ log_err("Failed to unpack message.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ continue;
+ }
+
+ if (msg->code != ENROLL_CODE__ENROLL_REQ) {
+ log_err("Wrong message type.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ enroll_msg__free_unpacked(msg, NULL);
+ continue;
+ }
+
+ log_dbg("Enrolling a new neighbor.");
+
+ enroll_msg__free_unpacked(msg, NULL);
+
+ len = enroll_pack(&reply);
+ if (reply == NULL) {
+ log_err("Failed to pack enrollment message.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ continue;
+ }
+
+ log_dbg("Sending enrollment info (%zd bytes).", len);
+
+ if (flow_write(conn.flow_info.fd, reply, len)) {
+ log_err("Failed respond to enrollment request.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ free(reply);
+ continue;
+ }
+
+ free(reply);
+
+ len = flow_read(conn.flow_info.fd, buf, ENROLL_BUF_LEN);
+ if (len < 0) {
+ log_err("Failed to read from flow.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ continue;
+ }
+
+ msg = enroll_msg__unpack(NULL, len, buf);
+ if (msg == NULL) {
+ log_err("Failed to unpack message.");
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ continue;
+ }
+
+ if (msg->code != ENROLL_CODE__ENROLL_DONE || !msg->has_result)
{
+ log_err("Wrong message type.");
+ enroll_msg__free_unpacked(msg, NULL);
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ continue;
+ }
+
+ if (msg->result == 0)
+ log_dbg("Neighbor enrollment successful.");
+ else
+ log_dbg("Neigbor reported failed enrollment.");
+
+ enroll_msg__free_unpacked(msg, NULL);
+
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ }
+
+ return 0;
+}
+
+int enroll_boot(struct conn * conn)
+{
+ log_dbg("Getting boot information.");
+
+ if (send_rcv_enroll_msg(conn->flow_info.fd)) {
+ log_err("Failed to enroll.");
+ return -1;
+ }
+
+ return 0;
+}
+
+int enroll_done(struct conn * conn,
+ int result)
+{
+ enroll_msg_t msg = ENROLL_MSG__INIT;
+ uint8_t buf[ENROLL_BUF_LEN];
+ ssize_t len;
+
+ msg.code = ENROLL_CODE__ENROLL_DONE;
+ msg.has_result = true;
+ msg.result = result;
+
+ len = enroll_msg__get_packed_size(&msg);
+ if (len < 0) {
+ log_dbg("Failed pack request message.");
+ return -1;
+ }
+
+ enroll_msg__pack(&msg, buf);
+
+ if (flow_write(conn->flow_info.fd, buf, len)) {
+ log_dbg("Failed to send acknowledgment.");
+ return -1;
+ }
+
+ return 0;
+}
+
+void enroll_bootstrap(const struct ipcp_config * conf)
+{
+ assert(conf);
+
+ memcpy(&enroll.conf, conf, sizeof(enroll.conf));
+}
+
+struct ipcp_config * enroll_get_conf(void)
+{
+ return &enroll.conf;
+}
+
+int enroll_init(void)
+{
+ struct conn_info info;
+
+ memset(&info, 0, sizeof(info));
+
+ strcpy(info.comp_name, ENROLL_COMP);
+ strcpy(info.protocol, ENROLL_PROTO);
+ info.pref_version = 1;
+ info.pref_syntax = PROTO_GPB;
+ info.addr = 0;
+
+ if (connmgr_comp_init(COMPID_ENROLL, &info)) {
+ log_err("Failed to register with connmgr.");
+ return -1;
+ }
+
+ enroll.state = ENROLL_INIT;
+
+ return 0;
+}
+
+void enroll_fini(void)
+{
+ if (enroll.state == ENROLL_RUNNING)
+ pthread_join(enroll.listener, NULL);
+
+ connmgr_comp_fini(COMPID_ENROLL);
+}
+
+int enroll_start(void)
+{
+ if (pthread_create(&enroll.listener, NULL, enroll_handle, NULL))
+ return -1;
+
+ enroll.state = ENROLL_RUNNING;
+
+ return 0;
+}
+
+void enroll_stop(void)
+{
+ if (enroll.state == ENROLL_RUNNING)
+ pthread_cancel(enroll.listener);
+}
diff --git a/src/ipcpd/broadcast/enroll.h b/src/ipcpd/broadcast/enroll.h
new file mode 100644
index 0000000..615b702
--- /dev/null
+++ b/src/ipcpd/broadcast/enroll.h
@@ -0,0 +1,47 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Enrollment Task
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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/.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_ENROLL_H
+#define OUROBOROS_IPCPD_NORMAL_ENROLL_H
+
+#include <ouroboros/ipcp.h>
+
+#include "comp.h"
+
+int enroll_init(void);
+
+void enroll_fini(void);
+
+int enroll_start(void);
+
+void enroll_stop(void);
+
+void enroll_bootstrap(const struct ipcp_config * conf);
+
+int enroll_boot(struct conn * conn);
+
+int enroll_done(struct conn * conn,
+ int result);
+
+struct ipcp_config * enroll_get_conf(void);
+
+#endif /* OUROBOROS_IPCPD_NORMAL_ENROLL_H */
diff --git a/src/ipcpd/broadcast/main.c b/src/ipcpd/broadcast/main.c
new file mode 100644
index 0000000..8c6bfa7
--- /dev/null
+++ b/src/ipcpd/broadcast/main.c
@@ -0,0 +1,359 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Broadcast IPC Process
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * 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 200809L
+#endif
+
+#include "config.h"
+
+#define OUROBOROS_PREFIX "broadcast-ipcp"
+
+#include <ouroboros/errno.h>
+#include <ouroboros/hash.h>
+#include <ouroboros/dev.h>
+#include <ouroboros/ipcp-dev.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/notifier.h>
+#include <ouroboros/rib.h>
+#include <ouroboros/time_utils.h>
+
+#include "connmgr.h"
+#include "dt.h"
+#include "enroll.h"
+#include "ipcp.h"
+
+#include <stdbool.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <inttypes.h>
+
+#define THIS_TYPE IPCP_BROADCAST
+
+static int initialize_components(const struct ipcp_config * conf)
+{
+ ipcpi.layer_name = strdup(conf->layer_info.layer_name);
+ if (ipcpi.layer_name == NULL) {
+ log_err("Failed to set layer name.");
+ goto fail_layer_name;
+ }
+
+ ipcpi.dir_hash_algo = conf->layer_info.dir_hash_algo;
+
+ assert(ipcp_dir_hash_len() != 0);
+
+ if (dt_init()) {
+ log_err("Failed to initialize forwarding component.");
+ goto fail_dt;
+ }
+
+ ipcp_set_state(IPCP_INIT);
+
+ return 0;
+
+ fail_dt:
+ free(ipcpi.layer_name);
+ fail_layer_name:
+ return -1;
+}
+
+static void finalize_components(void)
+{
+ dt_fini();
+
+ free(ipcpi.layer_name);
+}
+
+static int start_components(void)
+{
+ assert(ipcp_get_state() == IPCP_INIT);
+
+ ipcp_set_state(IPCP_OPERATIONAL);
+
+ if (enroll_start()) {
+ log_err("Failed to start enrollment.");
+ goto fail_enroll_start;
+ }
+
+ if (connmgr_start()) {
+ log_err("Failed to start AP connection manager.");
+ goto fail_connmgr_start;
+ }
+
+ return 0;
+
+ fail_connmgr_start:
+ enroll_stop();
+ fail_enroll_start:
+ ipcp_set_state(IPCP_INIT);
+ return -1;
+}
+
+static void stop_components(void)
+{
+ assert(ipcp_get_state() == IPCP_OPERATIONAL ||
+ ipcp_get_state() == IPCP_SHUTDOWN);
+
+ connmgr_stop();
+
+ enroll_stop();
+
+ ipcp_set_state(IPCP_INIT);
+}
+
+static int broadcast_ipcp_enroll(const char * dst,
+ struct layer_info * info)
+{
+ struct conn conn;
+
+ if (connmgr_alloc(COMPID_ENROLL, dst, NULL, &conn)) {
+ log_err("Failed to get connection.");
+ goto fail_er_flow;
+ }
+
+ /* Get boot state from peer. */
+ if (enroll_boot(&conn)) {
+ log_err("Failed to get boot information.");
+ goto fail_enroll_boot;
+ }
+
+ if (initialize_components(enroll_get_conf())) {
+ log_err("Failed to initialize IPCP components.");
+ goto fail_enroll_boot;
+ }
+
+ if (start_components()) {
+ log_err("Failed to start components.");
+ goto fail_start_comp;
+ }
+
+ if (enroll_done(&conn, 0))
+ log_warn("Failed to confirm enrollment with peer.");
+
+ if (connmgr_dealloc(COMPID_ENROLL, &conn))
+ log_warn("Failed to deallocate enrollment flow.");
+
+ log_info("Enrolled with %s.", dst);
+
+ info->dir_hash_algo = ipcpi.dir_hash_algo;
+ strcpy(info->layer_name, ipcpi.layer_name);
+
+ return 0;
+
+ fail_start_comp:
+ finalize_components();
+ fail_enroll_boot:
+ connmgr_dealloc(COMPID_ENROLL, &conn);
+ fail_er_flow:
+ return -1;
+}
+
+static int broadcast_ipcp_bootstrap(const struct ipcp_config * conf)
+{
+ assert(conf);
+ assert(conf->type == THIS_TYPE);
+
+ enroll_bootstrap(conf);
+
+ if (initialize_components(conf)) {
+ log_err("Failed to init IPCP components.");
+ goto fail_init;
+ }
+
+ if (start_components()) {
+ log_err("Failed to init IPCP components.");
+ goto fail_start;
+ }
+
+ log_dbg("Bootstrapped in layer %s.", conf->layer_info.layer_name);
+
+ return 0;
+
+ fail_start:
+ finalize_components();
+ fail_init:
+ return -1;
+}
+
+static int broadcast_ipcp_query(const uint8_t * dst)
+{
+ uint8_t * buf;
+ size_t len;
+ int ret;
+ char * multicast_name;
+ char * suffix = ".mc";
+
+ len = hash_len(ipcpi.dir_hash_algo);
+ buf = malloc(len);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ multicast_name = malloc(strlen(ipcpi.layer_name) + strlen(suffix) + 1);
+ if (multicast_name == NULL) {
+ free(buf);
+ return -ENOMEM;
+ }
+
+ strcpy(multicast_name, ipcpi.layer_name);
+ strcat(multicast_name, suffix);
+
+ str_hash(ipcpi.dir_hash_algo, buf, multicast_name);
+
+ free(multicast_name);
+
+ ret = memcmp(buf, dst, len);
+
+ free(buf);
+
+ return ret;
+}
+
+static int broadcast_ipcp_alloc(int fd,
+ const uint8_t * dst,
+ qosspec_t qs)
+{
+ struct conn conn;
+
+ (void) qs;
+
+ memset(&conn, 0, sizeof(conn));
+
+ conn.flow_info.fd = fd;
+
+ if (broadcast_ipcp_query(dst) != 0)
+ return -1;
+
+ notifier_event(NOTIFY_DT_CONN_ADD, &conn);
+
+ ipcp_flow_alloc_reply(fd, 0);
+
+ return 0;
+}
+
+int broadcast_ipcp_dealloc(int fd)
+{
+ struct conn conn;
+
+ memset(&conn, 0, sizeof(conn));
+
+ conn.flow_info.fd = fd;
+
+ notifier_event(NOTIFY_DT_CONN_DEL, &conn);
+
+ flow_dealloc(fd);
+
+ return 0;
+}
+
+
+static struct ipcp_ops broadcast_ops = {
+ .ipcp_bootstrap = broadcast_ipcp_bootstrap,
+ .ipcp_enroll = broadcast_ipcp_enroll,
+ .ipcp_connect = connmgr_ipcp_connect,
+ .ipcp_disconnect = connmgr_ipcp_disconnect,
+ .ipcp_reg = NULL,
+ .ipcp_unreg = NULL,
+ .ipcp_query = broadcast_ipcp_query,
+ .ipcp_flow_alloc = broadcast_ipcp_alloc,
+ .ipcp_flow_alloc_resp = NULL,
+ .ipcp_flow_dealloc = broadcast_ipcp_dealloc
+};
+
+int main(int argc,
+ char * argv[])
+{
+ if (ipcp_init(argc, argv, &broadcast_ops) < 0) {
+ log_err("Failed to init IPCP.");
+ goto fail_init;
+ }
+
+ /* These components must be init at creation. */
+ if (rib_init(ipcpi.name)) {
+ log_err("Failed to initialize RIB.");
+ goto fail_rib_init;
+ }
+
+ if (notifier_init()) {
+ log_err("Failed to initialize notifier component.");
+ goto fail_notifier_init;
+ }
+
+ if (connmgr_init()) {
+ log_err("Failed to initialize connection manager.");
+ goto fail_connmgr_init;
+ }
+
+ if (enroll_init()) {
+ log_err("Failed to initialize enrollment component.");
+ goto fail_enroll_init;
+ }
+
+ if (ipcp_boot() < 0) {
+ log_err("Failed to boot IPCP.");
+ goto fail_boot;
+ }
+
+ if (ipcp_create_r(getpid(), 0)) {
+ log_err("Failed to notify IRMd we are initialized.");
+ ipcp_set_state(IPCP_NULL);
+ goto fail_create_r;
+ }
+
+ ipcp_shutdown();
+
+ if (ipcp_get_state() == IPCP_SHUTDOWN) {
+ stop_components();
+ finalize_components();
+ }
+
+ enroll_fini();
+
+ connmgr_fini();
+
+ notifier_fini();
+
+ rib_fini();
+
+ ipcp_fini();
+
+ exit(EXIT_SUCCESS);
+
+ fail_create_r:
+ ipcp_shutdown();
+ fail_boot:
+ enroll_fini();
+ fail_enroll_init:
+ connmgr_fini();
+ fail_connmgr_init:
+ notifier_fini();
+ fail_notifier_init:
+ rib_fini();
+ fail_rib_init:
+ ipcp_fini();
+ fail_init:
+ ipcp_create_r(getpid(), -1);
+ exit(EXIT_FAILURE);
+}
diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index 862b346..60a15c1 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -256,8 +256,14 @@ static void * mainloop(void * o)
layer_info.dir_hash_algo = HASH_MD5;
}
- /* Only udp needs a fixed hash algorithm */
- if (conf_msg->ipcp_type != IPCP_UDP) {
+ if (conf_msg->ipcp_type == IPCP_BROADCAST) {
+ conf.layer_info.dir_hash_algo = HASH_SHA3_256;
+ layer_info.dir_hash_algo = HASH_SHA3_256;
+ }
+
+ /* Only udp and broadcast have a fixed hash algorithm
*/
+ if (conf_msg->ipcp_type != IPCP_UDP &&
+ conf_msg->ipcp_type != IPCP_BROADCAST) {
switch(conf_msg->layer_info->dir_hash_algo) {
case DIR_HASH_SHA3_224:
conf.layer_info.dir_hash_algo =
diff --git a/src/irmd/config.h.in b/src/irmd/config.h.in
index a4c7128..ad8a552 100644
--- a/src/irmd/config.h.in
+++ b/src/irmd/config.h.in
@@ -24,6 +24,7 @@
#define IPCP_ETH_LLC_EXEC "@IPCP_ETH_LLC_TARGET@"
#define IPCP_ETH_DIX_EXEC "@IPCP_ETH_DIX_TARGET@"
#define IPCP_NORMAL_EXEC "@IPCP_NORMAL_TARGET@"
+#define IPCP_BROADCAST_EXEC "@IPCP_BROADCAST_TARGET@"
#define IPCP_LOCAL_EXEC "@IPCP_LOCAL_TARGET@"
#define IPCP_RAPTOR_EXEC "@IPCP_RAPTOR_TARGET@"
diff --git a/src/irmd/ipcp.c b/src/irmd/ipcp.c
index 19e68ee..7f3f480 100644
--- a/src/irmd/ipcp.c
+++ b/src/irmd/ipcp.c
@@ -140,6 +140,9 @@ pid_t ipcp_create(const char * name,
case IPCP_NORMAL:
exec_name = IPCP_NORMAL_EXEC;
break;
+ case IPCP_BROADCAST:
+ exec_name = IPCP_BROADCAST_EXEC;
+ break;
case IPCP_UDP:
exec_name = IPCP_UDP_EXEC;
break;
diff --git a/src/irmd/main.c b/src/irmd/main.c
index 9ddcbbb..67e16de 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -618,7 +618,7 @@ static int connect_ipcp(pid_t pid,
return -EIPCP;
}
- if (entry->type != IPCP_NORMAL) {
+ if (entry->type != IPCP_NORMAL && entry->type != IPCP_BROADCAST) {
pthread_rwlock_unlock(&irmd.reg_lock);
log_err("Cannot establish connections for this IPCP type.");
return -EIPCP;
diff --git a/src/lib/irm.c b/src/lib/irm.c
index bf10ae3..dcc315d 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -142,6 +142,7 @@ int irm_bootstrap_ipcp(pid_t pid,
config.dns_addr = conf->dns_addr;
break;
case IPCP_LOCAL:
+ case IPCP_BROADCAST:
case IPCP_RAPTOR:
break;
case IPCP_ETH_LLC:
diff --git a/src/tools/CMakeLists.txt b/src/tools/CMakeLists.txt
index d7a4d17..7c40d9a 100644
--- a/src/tools/CMakeLists.txt
+++ b/src/tools/CMakeLists.txt
@@ -1,6 +1,7 @@
add_subdirectory(irm)
add_subdirectory(ocbr)
add_subdirectory(oecho)
+add_subdirectory(obc)
add_subdirectory(oping)
add_subdirectory(operf)
if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
diff --git a/src/tools/irm/irm_ipcp_bootstrap.c
b/src/tools/irm/irm_ipcp_bootstrap.c
index 3d9386a..861b152 100644
--- a/src/tools/irm/irm_ipcp_bootstrap.c
+++ b/src/tools/irm/irm_ipcp_bootstrap.c
@@ -51,6 +51,7 @@
#endif
#define NORMAL "normal"
+#define BROADCAST "broadcast"
#define UDP "udp"
#define ETH_LLC "eth-llc"
#define ETH_DIX "eth-dix"
@@ -86,7 +87,7 @@ static void usage(void)
" name <ipcp name>\n"
" layer <layer name>\n"
" [type [TYPE]]\n"
- "where TYPE = {" NORMAL " " LOCAL " "
+ "where TYPE = {" NORMAL " " BROADCAST " " LOCAL " "
UDP " " ETH_LLC " " ETH_DIX " " RAPTOR "},\n\n"
"if TYPE == " NORMAL "\n"
" [addr <address size> (default: %d)]\n"
@@ -125,7 +126,9 @@ static void usage(void)
"if TYPE == " RAPTOR "\n"
" [hash [ALGORITHM] (default: %s)]\n"
"where ALGORITHM = {" SHA3_224 " " SHA3_256 " "
- SHA3_384 " " SHA3_512 "}\n\n",
+ SHA3_384 " " SHA3_512 "}\n"
+ "if TYPE == " BROADCAST "\n"
+ " [autobind]\n\n",
DEFAULT_ADDR_SIZE, DEFAULT_EID_SIZE, DEFAULT_TTL,
FLAT_RANDOM_ADDR_AUTH, LINK_STATE_ROUTING, SIMPLE_PFF,
SHA3_256, SHA3_256, 0xA000, SHA3_256, SHA3_256, SHA3_256);
@@ -250,6 +253,8 @@ int do_bootstrap_ipcp(int argc,
if (ipcp_type != NULL) {
if (strcmp(ipcp_type, NORMAL) == 0)
type = IPCP_NORMAL;
+ else if (strcmp(ipcp_type, BROADCAST) == 0)
+ type = IPCP_BROADCAST;
else if (strcmp(ipcp_type, UDP) == 0)
type = IPCP_UDP;
else if (strcmp(ipcp_type, ETH_LLC) == 0)
@@ -285,8 +290,9 @@ int do_bootstrap_ipcp(int argc,
}
conf.type = ipcps[i].type;
- if (autobind && conf.type != IPCP_NORMAL) {
- printf("Can only bind normal IPCPs, "
+ if (autobind && (conf.type != IPCP_NORMAL &&
+ conf.type != IPCP_BROADCAST)) {
+ printf("Can not bind this IPCP type,"
"autobind disabled.\n\n");
autobind = false;
}
@@ -326,6 +332,8 @@ int do_bootstrap_ipcp(int argc,
conf.dev = dev;
conf.ethertype = ethertype;
break;
+ case IPCP_BROADCAST:
+ /* FALLTHRU */
case IPCP_LOCAL:
/* FALLTHRU */
case IPCP_RAPTOR:
diff --git a/src/tools/irm/irm_ipcp_create.c b/src/tools/irm/irm_ipcp_create.c
index c886696..5694ecc 100644
--- a/src/tools/irm/irm_ipcp_create.c
+++ b/src/tools/irm/irm_ipcp_create.c
@@ -44,19 +44,20 @@
#include "irm_ops.h"
#include "irm_utils.h"
-#define NORMAL "normal"
-#define UDP "udp"
-#define ETH_LLC "eth-llc"
-#define ETH_DIX "eth-dix"
-#define LOCAL "local"
-#define RAPTOR "raptor"
+#define NORMAL "normal"
+#define BROADCAST "broadcast"
+#define UDP "udp"
+#define ETH_LLC "eth-llc"
+#define ETH_DIX "eth-dix"
+#define LOCAL "local"
+#define RAPTOR "raptor"
static void usage(void)
{
printf("Usage: irm ipcp create\n"
" name <ipcp name>\n"
" type [TYPE]\n\n"
- "where TYPE = {" NORMAL " " LOCAL " "
+ "where TYPE = {" NORMAL " " BROADCAST " " LOCAL " "
UDP " " ETH_LLC " " RAPTOR "}\n");
}
@@ -90,6 +91,8 @@ int do_create_ipcp(int argc,
if (strcmp(ipcp_type, NORMAL) == 0)
type = IPCP_NORMAL;
+ else if (strcmp(ipcp_type, BROADCAST) == 0)
+ type = IPCP_BROADCAST;
else if (strcmp(ipcp_type, UDP) == 0)
type = IPCP_UDP;
else if (strcmp(ipcp_type, LOCAL) == 0)
diff --git a/src/tools/irm/irm_ipcp_enroll.c b/src/tools/irm/irm_ipcp_enroll.c
index c1628af..5b6caf5 100644
--- a/src/tools/irm/irm_ipcp_enroll.c
+++ b/src/tools/irm/irm_ipcp_enroll.c
@@ -46,30 +46,39 @@
#include <string.h>
+#define NORMAL "normal"
+#define BROADCAST "broadcast"
+
static void usage(void)
{
printf("Usage: irm ipcp enroll\n"
" name <ipcp name>\n"
" layer <layer to enroll in>\n"
- " [autobind]\n");
+ " [type [TYPE], default = normal]\n"
+ " [autobind]\n"
+ "where TYPE = {" NORMAL " " BROADCAST "}\n");
}
int do_enroll_ipcp(int argc,
char ** argv)
{
- char * ipcp = NULL;
- char * layer = NULL;
+ char * ipcp = NULL;
+ char * layer = NULL;
struct ipcp_info * ipcps;
- pid_t pid = -1;
- ssize_t len = 0;
- int i = 0;
- bool autobind = false;
+ pid_t pid = -1;
+ ssize_t len = 0;
+ int i = 0;
+ bool autobind = false;
int cargs;
+ char * ipcp_type = NORMAL;
+ enum ipcp_type type = IPCP_INVALID;
while (argc > 0) {
cargs = 2;
if (matches(*argv, "name") == 0) {
ipcp = *(argv + 1);
+ } else if (matches(*argv, "type") == 0) {
+ ipcp_type = *(argv + 1);
} else if (matches(*argv, "layer") == 0) {
layer = *(argv + 1);
} else if (matches(*argv, "autobind") == 0) {
@@ -90,14 +99,19 @@ int do_enroll_ipcp(int argc,
return -1;
}
+ if (strcmp(ipcp_type, NORMAL) == 0)
+ type = IPCP_NORMAL;
+ else if (strcmp(ipcp_type, BROADCAST) == 0)
+ type = IPCP_BROADCAST;
+
len = irm_list_ipcps(&ipcps);
for (i = 0; i < len; i++)
if (wildcard_match(ipcps[i].name, ipcp) == 0 &&
- ipcps[i].type == IPCP_NORMAL)
+ ipcps[i].type == type)
pid = ipcps[i].pid;
if (pid < 0) {
- pid = irm_create_ipcp(ipcp, IPCP_NORMAL);
+ pid = irm_create_ipcp(ipcp, type);
if (pid < 0)
goto fail;
free(ipcps);
@@ -105,7 +119,7 @@ int do_enroll_ipcp(int argc,
}
for (i = 0; i < len; i++) {
- if (ipcps[i].type != IPCP_NORMAL)
+ if (ipcps[i].type != type)
continue;
if (wildcard_match(ipcps[i].name, ipcp) == 0) {
pid = ipcps[i].pid;
@@ -121,7 +135,8 @@ int do_enroll_ipcp(int argc,
}
if (autobind && irm_bind_process(pid, layer)) {
- printf("Failed to bind %d to %s.\n", pid,
layer);
+ printf("Failed to bind %d to %s.\n",
+ pid, layer);
goto fail;
}
}
diff --git a/src/tools/obc/CMakeLists.txt b/src/tools/obc/CMakeLists.txt
new file mode 100644
index 0000000..db5e999
--- /dev/null
+++ b/src/tools/obc/CMakeLists.txt
@@ -0,0 +1,16 @@
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+set(SOURCE_FILES
+ # Add source files here
+ obc.c
+ )
+
+add_executable(obc ${SOURCE_FILES})
+
+target_link_libraries(obc LINK_PUBLIC ouroboros-dev)
+
+install(TARGETS obc RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/tools/obc/obc.c b/src/tools/obc/obc.c
new file mode 100644
index 0000000..9f27643
--- /dev/null
+++ b/src/tools/obc/obc.c
@@ -0,0 +1,153 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * A simple broadcast application
+ *
+ * Dimitri Staessens <dimitri.staessens@xxxxxxxx>
+ * Sander Vrijders <sander.vrijders@xxxxxxxx>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define _POSIX_C_SOURCE 199309L
+
+#include <ouroboros/dev.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define BUF_SIZE 256
+
+static void usage(void)
+{
+ printf("Usage: obc [OPTION]...\n"
+ "Sends a message to a broadcast network\n\n"
+ " -n --name Name of the broadcast layer\n"
+ " -m --message A message to send\n"
+ " [-l, --listen Listen mode]\n"
+ " --help Display this help text and
exit\n");
+}
+
+static int reader_main(const char * dst)
+{
+ int fd;
+ char buf[BUF_SIZE];
+
+ printf("Starting a reader.\n");
+
+ fd = flow_alloc(dst, NULL, NULL);
+ if (fd < 0) {
+ printf("Failed to allocate multicast flow.\n");
+ return -1;
+ }
+
+ printf("New flow.\n");
+
+ while (true) {
+ ssize_t count = flow_read(fd, &buf, BUF_SIZE);
+ if (count < 0) {
+ printf("Failed to read.\n");
+ flow_dealloc(fd);
+ break;
+ }
+
+ printf("Message is %.*s.\n", (int) count, buf);
+ }
+
+ return 0;
+}
+
+static int writer_main(const char * dst,
+ const char * message)
+{
+ int fd = 0;
+
+ fd = flow_alloc(dst, NULL, NULL);
+ if (fd < 0) {
+ printf("Failed to allocate multicast flow.\n");
+ return -1;
+ }
+
+ if (flow_write(fd, message, strlen(message) + 1) < 0) {
+ printf("Failed to write packet.\n");
+ flow_dealloc(fd);
+ return -1;
+ }
+
+ flow_dealloc(fd);
+
+ return 0;
+}
+
+int main(int argc,
+ char ** argv)
+{
+ int ret = -1;
+ bool reader = false;
+ char * name = NULL;
+ char * msg = "Ouroboros multicast rocks!";
+
+ argc--;
+ argv++;
+ while (argc > 0) {
+ if (strcmp(*argv, "-l") == 0 ||
+ strcmp(*argv, "--listen") == 0) {
+ reader = true;
+ } else if (strcmp(*argv, "-n") == 0 ||
+ strcmp(*argv, "--name") == 0) {
+ name = *(argv + 1);
+ argc--;
+ argv++;
+ } else if (strcmp(*argv, "-m") == 0 ||
+ strcmp(*argv, "--message") == 0) {
+ msg = *(argv + 1);
+ argc--;
+ argv++;
+ } else {
+ usage();
+ return 0;
+ }
+ argc--;
+ argv++;
+ }
+
+ if (name == NULL) {
+ usage();
+ exit(EXIT_FAILURE);
+ }
+
+ if (reader)
+ ret = reader_main(name);
+ else
+ ret = writer_main(name, msg);
+
+ return ret;
+}
--
2.19.1
