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Diffstat (limited to 'src/ipcpd/broadcast/enroll.c')
-rw-r--r--src/ipcpd/broadcast/enroll.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/src/ipcpd/broadcast/enroll.c b/src/ipcpd/broadcast/enroll.c
new file mode 100644
index 00000000..f8641d31
--- /dev/null
+++ b/src/ipcpd/broadcast/enroll.c
@@ -0,0 +1,363 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Enrollment Task
+ *
+ * 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 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);
+}
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