assert(rename_status == 0);
}
+char *run_in_container(const char *cmd, const char *container_name, bool daemonize) {
+ char container_find_name[100];
+ struct lxc_container *container;
+
+ assert(cmd);
+ assert(container_name);
+ assert(snprintf(container_find_name, sizeof(container_find_name), "%s_%s",
+ state_ptr->test_case_name, container_name) >= 0);
+ assert(container = find_container(container_find_name));
+
+ return run_in_container_ex(cmd, container, daemonize);
+}
+
+char *execute_in_container(const char *cmd, const char *container_name, bool daemonize) {
+ struct lxc_container *container;
+
+ assert(cmd);
+ assert(container_name);
+ assert(container = find_container(container_name));
+
+ return run_in_container_ex(cmd, container, daemonize);
+}
+
/* Run 'cmd' inside the Container created for 'node' and return the first line of the output
or NULL if there is no output - useful when, for example, a meshlink invite is generated
by a node running inside a Container
'cmd' is run as a daemon if 'daemonize' is true - this mode is useful for running node
simulations in Containers
The caller is responsible for freeing the returned string */
-char *run_in_container(const char *cmd, const char *node, bool daemonize) {
- char attach_command[400];
- char *attach_argv[4];
- char container_find_name[100];
- struct lxc_container *container;
- FILE *attach_fp;
+char *run_in_container_ex(const char *cmd, struct lxc_container *container, bool daemonize) {
char *output = NULL;
- size_t output_len;
- int i;
-
- assert(snprintf(container_find_name, sizeof(container_find_name), "%s_%s",
- state_ptr->test_case_name, node) >= 0);
- assert(container = find_container(container_find_name));
+ size_t output_len = 0;
/* Run the command within the Container, either as a daemon or foreground process */
/* TO DO: Perform this operation using the LXC API - currently does not work using the API
Need to determine why it doesn't work, and make it work */
if(daemonize) {
- for(i = 0; i < 3; i++) {
- assert(attach_argv[i] = malloc(DAEMON_ARGV_LEN));
- }
+ char run_script_path[100];
+ char *attach_argv[4];
- assert(snprintf(attach_argv[0], DAEMON_ARGV_LEN, "%s/" LXC_UTIL_REL_PATH "/" LXC_RUN_SCRIPT,
+ assert(snprintf(run_script_path, sizeof(run_script_path), "%s/" LXC_UTIL_REL_PATH "/" LXC_RUN_SCRIPT,
meshlink_root_path) >= 0);
- strncpy(attach_argv[1], cmd, DAEMON_ARGV_LEN);
- strncpy(attach_argv[2], container->name, DAEMON_ARGV_LEN);
+ attach_argv[0] = run_script_path;
+ attach_argv[1] = (char *)cmd;
+ attach_argv[2] = container->name;
attach_argv[3] = NULL;
/* To daemonize, create a child process and detach it from its parent (this program) */
assert(daemon(1, 0) != -1); // Detach from the parent process
assert(execv(attach_argv[0], attach_argv) != -1); // Run exec() in the child process
}
-
- for(i = 0; i < 3; i++) {
- free(attach_argv[i]);
- }
} else {
- assert(snprintf(attach_command, sizeof(attach_command),
+ char *attach_command;
+ size_t attach_command_len;
+ int i;
+ attach_command_len = strlen(meshlink_root_path) + strlen(LXC_UTIL_REL_PATH) + strlen(LXC_RUN_SCRIPT) + strlen(cmd) + strlen(container->name) + 10;
+ attach_command = malloc(attach_command_len);
+ assert(attach_command);
+
+ assert(snprintf(attach_command, attach_command_len,
"%s/" LXC_UTIL_REL_PATH "/" LXC_RUN_SCRIPT " \"%s\" %s", meshlink_root_path, cmd,
container->name) >= 0);
+ FILE *attach_fp;
assert(attach_fp = popen(attach_command, "r"));
+ free(attach_command);
/* If the command has an output, strip out any trailing carriage returns or newlines and
return it, otherwise return NULL */
- assert(output = malloc(100));
- output_len = sizeof(output);
+ output = NULL;
+ output_len = 0;
if(getline(&output, &output_len, attach_fp) != -1) {
i = strlen(output) - 1;
/* Wait for a starting Container to obtain an IP Address, then save that IP for future use */
void container_wait_ip(int node) {
- char container_name[100], lxcls_command[200];
+ char container_name[100];
+ char *ip;
+
+ assert(snprintf(container_name, sizeof(container_name), "%s_%s", state_ptr->test_case_name,
+ state_ptr->node_names[node]) >= 0);
+ ip = container_wait_ip_ex(container_name);
+
+ strncpy(container_ips[node], ip, sizeof(container_ips[node])); // Save the IP for future use
+ PRINT_TEST_CASE_MSG("Node '%s' has IP Address %s\n", state_ptr->node_names[node],
+ container_ips[node]);
+ free(ip);
+}
+
+char *container_wait_ip_ex(const char *container_name) {
struct lxc_container *test_container;
+ char lxcls_command[200];
char *ip;
size_t ip_len;
- int i;
bool ip_found;
+ int i;
+ int timeout;
FILE *lxcls_fp;
- assert(snprintf(container_name, sizeof(container_name), "%s_%s", state_ptr->test_case_name,
- state_ptr->node_names[node]) >= 0);
assert(test_container = find_container(container_name));
assert(snprintf(lxcls_command, sizeof(lxcls_command),
"lxc-ls -f | grep %s | tr -s ' ' | cut -d ' ' -f 5", test_container->name) >= 0);
assert(ip = malloc(20));
ip_len = sizeof(ip);
ip_found = false;
+ timeout = 60;
- while(!ip_found) {
+ while(!ip_found && timeout) {
assert(lxcls_fp = popen(lxcls_command, "r")); // Run command
assert(getline((char **)&ip, &ip_len, lxcls_fp) != -1); // Read its output
/* Strip newlines and carriage returns from output */
ip_found = (strcmp(ip, "-") != 0); // If the output is not "-", IP has been acquired
assert(pclose(lxcls_fp) != -1);
sleep(1);
+ timeout--;
}
- strncpy(container_ips[node], ip, sizeof(container_ips[node])); // Save the IP for future use
- PRINT_TEST_CASE_MSG("Node '%s' has IP Address %s\n", state_ptr->node_names[node],
- container_ips[node]);
+ // Fail if IP cannot be read
+ assert(timeout);
- free(ip);
+ return ip;
}
/* Create all required test containers */
int i;
char container_name[100];
int create_status, snapshot_status, snap_restore_status;
- struct lxc_container *first_container;
+ struct lxc_container *first_container = NULL;
for(i = 0; i < num_nodes; i++) {
assert(snprintf(container_name, sizeof(container_name), "run_%s", node_names[i]) >= 0);
first_container->error_num, first_container->error_string);
assert(snapshot_status != -1);
} else {
+ assert(first_container);
snap_restore_status = first_container->snapshot_restore(first_container, "snap0",
container_name);
fprintf(stderr, "Snapshot restore to Container '%s' status: %d - %s\n", container_name,
/* Run the node_sim_<nodename> program inside the 'node''s container */
void node_sim_in_container(const char *node, const char *device_class, const char *invite_url) {
- char node_sim_command[200];
+ char *node_sim_command;
+ size_t node_sim_command_len;
- assert(snprintf(node_sim_command, sizeof(node_sim_command),
+ node_sim_command_len = 500 + (invite_url ? strlen(invite_url) : 0);
+ node_sim_command = calloc(1, node_sim_command_len);
+ assert(node_sim_command);
+ assert(snprintf(node_sim_command, node_sim_command_len,
"LD_LIBRARY_PATH=/home/ubuntu/test/.libs /home/ubuntu/test/node_sim_%s %s %s %s "
"1>&2 2>> node_sim_%s.log", node, node, device_class,
(invite_url) ? invite_url : "", node) >= 0);
run_in_container(node_sim_command, node, true);
PRINT_TEST_CASE_MSG("node_sim_%s started in Container\n", node);
+
+ free(node_sim_command);
}
/* Run the node_sim_<nodename> program inside the 'node''s container with event handling capable */
void node_sim_in_container_event(const char *node, const char *device_class,
const char *invite_url, const char *clientId, const char *import) {
- char node_sim_command[200];
-
- assert(snprintf(node_sim_command, sizeof(node_sim_command),
+ char *node_sim_command;
+ size_t node_sim_command_len;
+
+ assert(node && device_class && clientId && import);
+ node_sim_command_len = 500 + (invite_url ? strlen(invite_url) : 0);
+ node_sim_command = calloc(1, node_sim_command_len);
+ assert(node_sim_command);
+ assert(snprintf(node_sim_command, node_sim_command_len,
"LD_LIBRARY_PATH=/home/ubuntu/test/.libs /home/ubuntu/test/node_sim_%s %s %s %s %s %s "
"1>&2 2>> node_sim_%s.log", node, node, device_class,
clientId, import, (invite_url) ? invite_url : "", node) >= 0);
run_in_container(node_sim_command, node, true);
- PRINT_TEST_CASE_MSG("node_sim_%s(Client Id :%s) started in Container with event handling\n",
- node, clientId);
+ PRINT_TEST_CASE_MSG("node_sim_%s(Client Id :%s) started in Container with event handling\n%s\n",
+ node, clientId, node_sim_command);
+
+ free(node_sim_command);
}
/* Run the node_step.sh script inside the 'node''s container to send the 'sig' signal to the
container_ips[node]);
}
+char **get_container_interface_ips(const char *container_name, const char *interface_name) {
+ char **ips;
+ struct lxc_container *container = find_container(container_name);
+ assert(container);
+
+ char **interfaces = container->get_interfaces(container);
+ assert(interfaces);
+
+ int i;
+ ips = NULL;
+
+ for(i = 0; interfaces[i]; i++) {
+ if(!strcasecmp(interfaces[i], interface_name)) {
+ ips = container->get_ips(container, interface_name, "inet", 0);
+ assert(ips);
+ break;
+ }
+ }
+
+ free(interfaces);
+
+ return ips;
+}
+
+/* Install an app in a container */
+void install_in_container(const char *node, const char *app) {
+ char install_cmd[100];
+
+ assert(snprintf(install_cmd, sizeof(install_cmd),
+ "apt-get install %s -y >> /dev/null", app) >= 0);
+ char *ret = run_in_container(install_cmd, node, false);
+ // TODO: Check in container whether app has installed or not with a timeout
+ sleep(10);
+}
+
/* Return container's IP address */
char *get_container_ip(const char *node_name) {
char *ip;
return ip;
}
-/* Install an app in a container */
-void install_in_container(const char *node, const char *app) {
- char install_cmd[100];
-
- assert(snprintf(install_cmd, sizeof(install_cmd),
- "apt-get install %s -y >> /dev/null", app) >= 0);
- char *ret = run_in_container(install_cmd, node, false);
- // TODO: Check in container whether app has installed or not with a timeout
- sleep(10);
-}
-
/* Simulate a network failure by adding NAT rule in the container with it's IP address */
void block_node_ip(const char *node) {
char block_cmd[100];
assert(port >= 0 && port < 65536);
assert(!strcmp(chain, "INPUT") || !strcmp(chain, "FORWARD") || !strcmp(chain, "OUTPUT"));
- assert(!strcmp(protocol, "all") || !strcmp(protocol, "tcp") || !strcmp(protocol, "udp"));
+ assert(!strcmp(protocol, "all") || !strcmp(protocol, "tcp") || !strcmp(protocol, "udp") || !strcmp(protocol, "icmp"));
assert(snprintf(block_cmd, sizeof(block_cmd), "iptables -A %s -p %s --dport %d -j ACCEPT", chain, protocol, port) >= 0);
run_in_container(block_cmd, node, false);
}
run_in_container(unblock_cmd, node, false);
}
+char *block_icmp(const char *container_name) {
+ char block_cmd[500];
+ assert(container_name);
+ assert(snprintf(block_cmd, sizeof(block_cmd), "iptables -A FORWARD -p icmp -j DROP") >= 0);
+ return execute_in_container(block_cmd, container_name, false);
+}
+
+char *unblock_icmp(const char *container_name) {
+ char block_cmd[500];
+ assert(container_name);
+ assert(snprintf(block_cmd, sizeof(block_cmd), "iptables -D FORWARD -p icmp -j DROP") >= 0);
+ return execute_in_container(block_cmd, container_name, false);
+}
+
+char *change_container_mtu(const char *container_name, const char *interface_name, int mtu) {
+ char cmd[500];
+ assert(container_name);
+ assert(snprintf(cmd, sizeof(cmd), "ifconfig %s mtu %d", interface_name, mtu) >= 0);
+ return execute_in_container(cmd, container_name, false);
+}
+
+char *flush_conntrack(const char *container_name) {
+ assert(container_name);
+
+ return execute_in_container("conntrack -F", container_name, false);
+}
+
+void flush_nat_rules(const char *container_name, const char *chain) {
+ char *ret;
+ char flush_cmd[500];
+
+ assert(container_name);
+ assert(snprintf(flush_cmd, sizeof(flush_cmd), "iptables -F %s", chain ? chain : "") >= 0);
+ ret = execute_in_container("iptables -F", container_name, false);
+ assert(ret == NULL);
+}
+
+void add_full_cone_nat_rules(const char *container_name, const char *pub_interface, const char *priv_interface_listen_address) {
+ char nat_cmd[500];
+ char *ret;
+
+ char **pub_interface_ips = get_container_interface_ips(container_name, pub_interface);
+ assert(pub_interface_ips[0]);
+ char *pub_interface_ip = pub_interface_ips[0];
+
+ assert(snprintf(nat_cmd, sizeof(nat_cmd),
+ "%s/" LXC_UTIL_REL_PATH "/" LXC_NAT_FULL_CONE " %s %s %s %s >/dev/null",
+ meshlink_root_path, container_name, pub_interface, pub_interface_ip, priv_interface_listen_address) >= 0);
+ assert(system(nat_cmd) == 0);
+ free(pub_interface_ips);
+}
+
+/* Create a NAT and a bridge, bridge connected to NAT and containers to be NATed can be switched
+ to the NAT bridge from lxcbr0 */
+void nat_create(const char *nat_name, const char *nat_bridge, int nat_type) {
+ char build_command[200];
+ assert(snprintf(build_command, sizeof(build_command),
+ "%s/" LXC_UTIL_REL_PATH "/" LXC_NAT_BUILD " %s %s %s >/dev/stderr",
+ meshlink_root_path, nat_name, nat_bridge, meshlink_root_path) >= 0);
+ assert(system(build_command) == 0);
+}
+
+void nat_destroy(const char *nat_name) {
+ char build_command[200];
+ assert(snprintf(build_command, sizeof(build_command),
+ "%s/" LXC_UTIL_REL_PATH "/" LXC_NAT_DESTROY " %s +x >/dev/null",
+ meshlink_root_path, nat_name) >= 0);
+ assert(system(build_command) == 0);
+}
+
+/* Switches a container from current bridge to a new bridge */
+void container_switch_bridge(const char *container_name, char *lxc_conf_path, const char *current_bridge, const char *new_bridge) {
+ char config_path[500];
+ char buffer[500];
+ struct lxc_container *container;
+ char *lxc_path_temp;
+ char *ip;
+
+ PRINT_TEST_CASE_MSG("Switiching container %s from bridge '%s' to bridge '%s'", container_name, current_bridge, new_bridge);
+ lxc_path_temp = lxc_path;
+ lxc_path = lxc_conf_path;
+ container = find_container(container_name);
+ assert(container);
+ lxc_path = lxc_path_temp;
+ assert(snprintf(config_path, sizeof(config_path), "%s/%s/config", lxc_conf_path, container_name) >= 0);
+ FILE *fp = fopen(config_path, "r");
+ assert(fp);
+ FILE *fp_temp = fopen(".temp_file", "w");
+ assert(fp_temp);
+
+ char search_str[500];
+ int net_no;
+
+ while((fgets(buffer, sizeof(buffer), fp)) != NULL) {
+ if(sscanf(buffer, "lxc.net.%d.link", &net_no) == 1) {
+ char *ptr;
+ int len;
+
+ if((ptr = strstr(buffer, current_bridge)) != NULL) {
+ len = strlen(current_bridge);
+
+ if(((*(ptr - 1) == ' ') || (*(ptr - 1) == '\t') || (*(ptr - 1) == '=')) && ((ptr[len] == '\n') || (ptr[len] == '\t') || (ptr[len] == '\0') || (ptr[len] == ' '))) {
+ sprintf(buffer, "lxc.net.%d.link = %s\n", net_no, new_bridge);
+ }
+ }
+ }
+
+ fputs(buffer, fp_temp);
+ }
+
+ fclose(fp_temp);
+ fclose(fp);
+ remove(config_path);
+ rename(".temp_file", config_path);
+
+ /* Restart the Container after building it and wait for it to acquire an IP */
+ char cmd[200];
+ int sys_ret;
+ assert(snprintf(cmd, sizeof(cmd), "lxc-stop %s", container_name) >= 0);
+ sys_ret = system(cmd);
+ assert(snprintf(cmd, sizeof(cmd), "lxc-start %s", container_name) >= 0);
+ sys_ret = system(cmd);
+ assert(sys_ret == 0);
+ ip = container_wait_ip_ex(container_name);
+ PRINT_TEST_CASE_MSG("Obtained IP address: %s for container %s after switching bridge", ip, container_name);
+ free(ip);
+}
+
/* Takes bridgeName as input parameter and creates a bridge */
void create_bridge(const char *bridgeName) {
char command[100] = "brctl addbr ";
PRINT_TEST_CASE_MSG("Firewall for outgoing requests added on IPv6");
assert(system("ip6tables -L") == 0);
}
+
+void bridge_add(const char *bridge_name) {
+ char cmd[500];
+
+ assert(bridge_name);
+ assert(snprintf(cmd, sizeof(cmd), "brctl addbr %s", bridge_name) >= 0);
+ assert(system(cmd) == 0);
+ assert(snprintf(cmd, sizeof(cmd), "ifconfig %s up", bridge_name) >= 0);
+ assert(system(cmd) == 0);
+}
+
+void bridge_delete(const char *bridge_name) {
+ char cmd[500];
+
+ assert(bridge_name);
+ assert(snprintf(cmd, sizeof(cmd), "brctl delbr %s", bridge_name) >= 0);
+ assert(system(cmd) == 0);
+}
+
+void bridge_add_interface(const char *bridge_name, const char *interface_name) {
+ char cmd[500];
+
+ assert(bridge_name || interface_name);
+ assert(snprintf(cmd, sizeof(cmd), "brctl addif %s %s", bridge_name, interface_name) >= 0);
+ assert(system(cmd) == 0);
+}
projects / meshlink / blobdiff