#include <catta/alternative.h>
#include <catta/error.h>
+#if defined(__APPLE__) || defined(__unix) && !defined(__linux)
+#include <net/route.h>
+#elif defined(__linux)
+#include <asm/types.h>
+#include <net/if.h>
+#include <linux/if_link.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#endif
+
#include "meshlink_internal.h"
+#include "event.h"
#include "discovery.h"
#include "sockaddr.h"
#include "logger.h"
+#include "netutl.h"
#include "node.h"
#include "connection.h"
#include "xalloc.h"
logger(mesh, MESHLINK_DEBUG, "Adding service\n");
- /* Ifthis is the first time we're called, let's create a new entry group */
+ /* If this is the first time we're called, let's create a new entry group */
if(!(mesh->catta_group = catta_s_entry_group_new(mesh->catta_server, discovery_entry_group_callback, mesh))) {
logger(mesh, MESHLINK_ERROR, "catta_entry_group_new() failed: %s\n", catta_strerror(catta_server_errno(mesh->catta_server)));
goto fail;
free(fingerprint);
free(txt_name);
free(txt_fingerprint);
-
- pthread_mutex_unlock(&(mesh->mesh_mutex));
}
static void discovery_server_callback(CattaServer *server, CattaServerState state, void *userdata) {
switch(state) {
case CATTA_SERVER_RUNNING:
+
/* The serve has startup successfully and registered its host
* name on the network, so it's time to create our services */
- pthread_mutex_lock(&(mesh->mesh_mutex));
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
if(!mesh->catta_group) {
discovery_create_services(mesh);
}
- pthread_mutex_unlock(&(mesh->mesh_mutex));
+ pthread_mutex_unlock(&mesh->mutex);
break;
char hostname[17];
generate_rand_string(mesh, hostname, sizeof(hostname));
- pthread_mutex_lock(&(mesh->mesh_mutex));
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
assert(mesh->catta_server);
assert(mesh->catta_poll);
catta_simple_poll_quit(mesh->catta_poll);
}
- pthread_mutex_unlock(&(mesh->mesh_mutex));
+ pthread_mutex_unlock(&mesh->mutex);
}
break;
case CATTA_SERVER_REGISTERING:
- pthread_mutex_lock(&(mesh->mesh_mutex));
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
/* Let's drop our registered services. When the server is back
* in CATTA_SERVER_RUNNING state we will register them
mesh->catta_group = NULL;
}
- pthread_mutex_unlock(&(mesh->mesh_mutex));
+ pthread_mutex_unlock(&mesh->mutex);
break;
case CATTA_SERVER_FAILURE:
- pthread_mutex_lock(&(mesh->mesh_mutex));
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
assert(mesh->catta_server);
assert(mesh->catta_poll);
/* Terminate on failure */
catta_simple_poll_quit(mesh->catta_poll);
- pthread_mutex_unlock(&(mesh->mesh_mutex));
+ pthread_mutex_unlock(&mesh->mutex);
break;
case CATTA_SERVER_INVALID:
char *node_fp = (char *)catta_string_list_get_text(node_fp_li) + strlen(MESHLINK_MDNS_FINGERPRINT_KEY);
if(node_name[0] == '=' && node_fp[0] == '=') {
- pthread_mutex_lock(&(mesh->mesh_mutex));
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
node_name += 1;
}
if(naddress.unknown.family != AF_UNKNOWN) {
- meshlink_hint_address(mesh, (meshlink_node_t *)node, (struct sockaddr *)&naddress);
-
node_t *n = (node_t *)node;
+ connection_t *c = n->connection;
+
+ n->catta_address = naddress;
+ node_add_recent_address(mesh, n, &naddress);
- if(n->connection && n->connection->outgoing) {
- n->connection->outgoing->timeout = 0;
+ if(c && c->outgoing && !c->status.active) {
+ c->outgoing->timeout = 0;
- if(n->connection->outgoing->ev.cb) {
- timeout_set(&mesh->loop, &n->connection->outgoing->ev, &(struct timeval) {
+ if(c->outgoing->ev.cb) {
+ timeout_set(&mesh->loop, &c->outgoing->ev, &(struct timespec) {
0, 0
});
}
- n->connection->last_ping_time = 0;
+ c->last_ping_time = -3600;
}
} else {
logger(mesh, MESHLINK_WARNING, "Node %s is not part of the mesh network.\n", node_name);
}
- pthread_mutex_unlock(&(mesh->mesh_mutex));
+ pthread_mutex_unlock(&mesh->mutex);
}
}
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
switch(event) {
case CATTA_BROWSER_FAILURE:
- pthread_mutex_lock(&mesh->mesh_mutex);
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
catta_simple_poll_quit(mesh->catta_poll);
- pthread_mutex_unlock(&mesh->mesh_mutex);
+ pthread_mutex_unlock(&mesh->mutex);
break;
case CATTA_BROWSER_NEW:
- pthread_mutex_lock(&mesh->mesh_mutex);
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
catta_s_service_resolver_new(mesh->catta_server, interface_, protocol, name, type, domain, CATTA_PROTO_UNSPEC, 0, discovery_resolve_callback, mesh);
handle_network_change(mesh, ++mesh->catta_interfaces);
- pthread_mutex_unlock(&mesh->mesh_mutex);
+ pthread_mutex_unlock(&mesh->mutex);
break;
case CATTA_BROWSER_REMOVE:
- pthread_mutex_lock(&mesh->mesh_mutex);
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
handle_network_change(mesh, --mesh->catta_interfaces);
- pthread_mutex_unlock(&mesh->mesh_mutex);
+ pthread_mutex_unlock(&mesh->mutex);
break;
case CATTA_BROWSER_ALL_FOR_NOW:
meshlink_handle_t *mesh = userdata;
assert(mesh);
+ if(pthread_mutex_lock(&mesh->discovery_mutex) != 0) {
+ abort();
+ }
+
// handle catta logs
catta_set_log_function(discovery_log_cb);
config.publish_hinfo = 0;
config.publish_addresses = 1;
config.publish_no_reverse = 1;
+ config.allow_point_to_point = 1;
/* Allocate a new server */
int error;
- mesh->catta_server = catta_server_new(catta_simple_poll_get(mesh->catta_poll), &config, discovery_server_callback, mesh, &error);
+ const CattaPoll *poller = catta_simple_poll_get(mesh->catta_poll);
+
+ if(!poller) {
+ logger(mesh, MESHLINK_ERROR, "Failed to create discovery server: %s\n", catta_strerror(error));
+ goto fail;
+ }
+
+ mesh->catta_server = catta_server_new(poller, &config, discovery_server_callback, mesh, &error);
/* Free the configuration data */
catta_server_config_free(&config);
- /* Check wether creating the server object succeeded */
+ /* Check whether creating the server object succeeded */
if(!mesh->catta_server) {
logger(mesh, MESHLINK_ERROR, "Failed to create discovery server: %s\n", catta_strerror(error));
goto fail;
fail:
- pthread_mutex_lock(&mesh->discovery_mutex);
pthread_cond_broadcast(&mesh->discovery_cond);
pthread_mutex_unlock(&mesh->discovery_mutex);
return NULL;
}
+typedef struct discovery_address {
+ int index;
+ bool up;
+ sockaddr_t address;
+} discovery_address_t;
+
+static int iface_compare(const void *va, const void *vb) {
+ const int *a = va;
+ const int *b = vb;
+ return *a - *b;
+}
+
+static int address_compare(const void *va, const void *vb) {
+ const discovery_address_t *a = va;
+ const discovery_address_t *b = vb;
+
+ if(a->index != b->index) {
+ return a->index - b->index;
+ }
+
+ return sockaddrcmp_noport(&a->address, &b->address);
+}
+
+static void send_mdns_packet(meshlink_handle_t *mesh, const discovery_address_t *addr) {
+ char *host = NULL, *port = NULL;
+ sockaddr2str(&addr->address, &host, &port);
+ fprintf(stderr, "Sending on iface %d %s port %s\n", addr->index, host, port);
+ free(host);
+ free(port);
+}
+
+static void iface_up(meshlink_handle_t *mesh, int index) {
+ int *p = bsearch(&index, mesh->discovery_ifaces, mesh->discovery_iface_count, sizeof(*p), iface_compare);
+
+ if(p) {
+ return;
+ }
+
+ fprintf(stderr, "iface %d up\n", index);
+ mesh->discovery_ifaces = xrealloc(mesh->discovery_ifaces, ++mesh->discovery_iface_count * sizeof(*p));
+ mesh->discovery_ifaces[mesh->discovery_iface_count - 1] = index;
+ qsort(mesh->discovery_ifaces, mesh->discovery_iface_count, sizeof(*p), iface_compare);
+
+ for(int i = 0; i < mesh->discovery_iface_count; i++) {
+ fprintf(stderr, "%d", mesh->discovery_ifaces[i]);
+ }
+
+ // Send an announcement for all addresses associated with this interface
+ for(int i = 0; i < mesh->discovery_address_count; i++) {
+ if(mesh->discovery_addresses[i].index == index) {
+ send_mdns_packet(mesh, &mesh->discovery_addresses[i]);
+ }
+ }
+}
+
+static void iface_down(meshlink_handle_t *const mesh, int index) {
+ int *p = bsearch(&index, mesh->discovery_ifaces, mesh->discovery_iface_count, sizeof(int), iface_compare);
+
+ if(!p) {
+ return;
+ }
+
+ fprintf(stderr, "iface %d down\n", index);
+ memmove(p, p + 1, --mesh->discovery_iface_count * sizeof(*p));
+}
+
+static void addr_add(meshlink_handle_t *mesh, const discovery_address_t *addr) {
+ discovery_address_t *p = bsearch(addr, mesh->discovery_addresses, mesh->discovery_address_count, sizeof(int), address_compare);
+
+ if(p) {
+ return;
+ }
+
+ bool up = bsearch(&addr->index, mesh->discovery_ifaces, mesh->discovery_iface_count, sizeof(*p), iface_compare);
+ char *host = NULL, *port = NULL;
+ sockaddr2str(&addr->address, &host, &port);
+ fprintf(stderr, "address %d %s port %s up %d\n", addr->index, host, port, up);
+ free(host);
+ free(port);
+
+ mesh->discovery_addresses = xrealloc(mesh->discovery_addresses, ++mesh->discovery_address_count * sizeof(*p));
+ mesh->discovery_addresses[mesh->discovery_address_count - 1] = *addr;
+ qsort(mesh->discovery_addresses, mesh->discovery_address_count, sizeof(*p), address_compare);
+
+ mesh->discovery_addresses[mesh->discovery_address_count - 1].up = up;
+
+ if(up) {
+ send_mdns_packet(mesh, &mesh->discovery_addresses[mesh->discovery_address_count - 1]);
+ }
+}
+
+static void addr_del(meshlink_handle_t *mesh, const discovery_address_t *addr) {
+ discovery_address_t *p = bsearch(addr, mesh->discovery_addresses, mesh->discovery_address_count, sizeof(*p), address_compare);
+
+ if(!p) {
+ return;
+ }
+
+ char *host = NULL, *port = NULL;
+ sockaddr2str(&addr->address, &host, &port);
+ fprintf(stderr, "address %d %s port %s down\n", addr->index, host, port);
+ free(host);
+ free(port);
+
+ memmove(p, p + 1, --mesh->discovery_address_count * sizeof(*p));
+}
+
+#if defined(__linux)
+static void netlink_getlink(int fd) {
+ static const struct {
+ struct nlmsghdr nlm;
+ struct ifinfomsg ifi;
+ } msg = {
+ .nlm.nlmsg_len = NLMSG_LENGTH(sizeof(msg.ifi)),
+ .nlm.nlmsg_type = RTM_GETLINK,
+ .nlm.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+ .nlm.nlmsg_seq = 1,
+ .ifi.ifi_family = AF_UNSPEC,
+ };
+ send(fd, &msg, msg.nlm.nlmsg_len, 0);
+}
+
+static void netlink_getaddr(int fd) {
+ static const struct {
+ struct nlmsghdr nlm;
+ struct ifaddrmsg ifa;
+ } msg = {
+ .nlm.nlmsg_len = NLMSG_LENGTH(sizeof(msg.ifa)),
+ .nlm.nlmsg_type = RTM_GETADDR,
+ .nlm.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+ .nlm.nlmsg_seq = 2,
+ .ifa.ifa_family = AF_UNSPEC,
+ };
+ send(fd, &msg, msg.nlm.nlmsg_len, 0);
+}
+
+
+static void netlink_parse_link(meshlink_handle_t *mesh, const struct nlmsghdr *nlm) {
+ const struct ifinfomsg *ifi = (const struct ifinfomsg *)(nlm + 1);
+
+ if(ifi->ifi_flags & IFF_UP && ifi->ifi_flags & IFF_MULTICAST) {
+ iface_up(mesh, ifi->ifi_index);
+ } else {
+ iface_down(mesh, ifi->ifi_index);
+ }
+}
+
+static void netlink_parse_addr(meshlink_handle_t *mesh, const struct nlmsghdr *nlm) {
+ const struct ifaddrmsg *ifa = (const struct ifaddrmsg *)(nlm + 1);
+ const uint8_t *ptr = (const uint8_t *)(ifa + 1);
+ size_t len = nlm->nlmsg_len - (ptr - (const uint8_t *)nlm);
+
+ while(len >= sizeof(struct rtattr)) {
+ const struct rtattr *rta = (const struct rtattr *)ptr;
+
+ if(rta->rta_len <= 0 || rta->rta_len > len) {
+ break;
+ }
+
+ if(rta->rta_type == IFA_ADDRESS) {
+ discovery_address_t addr = {
+ .index = ifa->ifa_index,
+ };
+
+ if(rta->rta_len == 8) {
+ addr.address.sa.sa_family = AF_INET;
+ memcpy(&addr.address.in.sin_addr, ptr + 4, 4);
+ addr.address.in.sin_port = 5353;
+ } else if(rta->rta_len == 20) {
+ addr.address.sa.sa_family = AF_INET6;
+ memcpy(&addr.address.in6.sin6_addr, ptr + 4, 16);
+ addr.address.in6.sin6_port = 5353;
+ addr.address.in6.sin6_scope_id = ifa->ifa_index;
+ } else {
+ addr.address.sa.sa_family = AF_UNKNOWN;
+ }
+
+ if(addr.address.sa.sa_family != AF_UNKNOWN) {
+ if(nlm->nlmsg_type == RTM_NEWADDR) {
+ addr_add(mesh, &addr);
+ } else {
+ addr_del(mesh, &addr);
+ }
+ }
+ }
+
+ unsigned short rta_len = (rta->rta_len + 3) & ~3;
+ ptr += rta_len;
+ len -= rta_len;
+ }
+}
+
+static void netlink_parse(meshlink_handle_t *mesh, const void *data, size_t len) {
+ const uint8_t *ptr = data;
+
+ while(len >= sizeof(struct nlmsghdr)) {
+ const struct nlmsghdr *nlm = (const struct nlmsghdr *)ptr;
+
+ if(nlm->nlmsg_len > len) {
+ break;
+ }
+
+ switch(nlm->nlmsg_type) {
+ case RTM_NEWLINK:
+ case RTM_DELLINK:
+ netlink_parse_link(mesh, nlm);
+ break;
+
+ case RTM_NEWADDR:
+ case RTM_DELADDR:
+ netlink_parse_addr(mesh, nlm);
+ }
+
+ ptr += nlm->nlmsg_len;
+ len -= nlm->nlmsg_len;
+ }
+}
+
+static void netlink_io_handler(event_loop_t *loop, void *data, int flags) {
+ (void)flags;
+ static time_t prev_update;
+ meshlink_handle_t *mesh = data;
+
+ struct {
+ struct nlmsghdr nlm;
+ char data[16384];
+ } msg;
+
+ while(true) {
+ ssize_t result = recv(mesh->pfroute_io.fd, &msg, sizeof(msg), MSG_DONTWAIT);
+
+ if(result <= 0) {
+ if(result == 0 || errno == EAGAIN || errno == EINTR) {
+ break;
+ }
+
+ logger(mesh, MESHLINK_ERROR, "Reading from Netlink socket failed: %s\n", strerror(errno));
+ io_set(loop, &mesh->pfroute_io, 0);
+ }
+
+ if((size_t)result < sizeof(msg.nlm)) {
+ logger(mesh, MESHLINK_ERROR, "Invalid Netlink message\n");
+ break;
+ }
+
+ if(msg.nlm.nlmsg_type == NLMSG_DONE) {
+ if(msg.nlm.nlmsg_seq == 1) {
+ // We just got the result of GETLINK, now send GETADDR.
+ netlink_getaddr(mesh->pfroute_io.fd);
+ }
+ } else {
+ netlink_parse(mesh, &msg, result);
+
+ if(loop->now.tv_sec > prev_update + 5) {
+ prev_update = loop->now.tv_sec;
+ handle_network_change(mesh, 1);
+ }
+ }
+ }
+}
+#elif defined(RTM_NEWADDR)
+static void pfroute_io_handler(event_loop_t *loop, void *data, int flags) {
+ (void)flags;
+ static time_t prev_update;
+ meshlink_handle_t *mesh = data;
+
+ struct {
+ struct rt_msghdr rtm;
+ char data[2048];
+ } msg;
+
+ while(true) {
+ msg.rtm.rtm_version = 0;
+ ssize_t result = recv(mesh->pfroute_io.fd, &msg, sizeof(msg), MSG_DONTWAIT);
+
+ if(result <= 0) {
+ if(result == 0 || errno == EAGAIN || errno == EINTR) {
+ break;
+ }
+
+ logger(mesh, MESHLINK_ERROR, "Reading from PFROUTE socket failed: %s\n", strerror(errno));
+ io_set(loop, &mesh->pfroute_io, 0);
+ }
+
+ if(msg.rtm.rtm_version != RTM_VERSION) {
+ logger(mesh, MESHLINK_ERROR, "Invalid PFROUTE message version\n");
+ break;
+ }
+
+ switch(msg.rtm.rtm_type) {
+ case RTM_IFINFO:
+ case RTM_NEWADDR:
+ case RTM_DELADDR:
+ if(loop->now.tv_sec > prev_update + 5) {
+ prev_update = loop->now.tv_sec;
+ handle_network_change(mesh, 1);
+ }
+
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+#endif
+
bool discovery_start(meshlink_handle_t *mesh) {
logger(mesh, MESHLINK_DEBUG, "discovery_start called\n");
assert(!mesh->discovery_threadstarted);
assert(!mesh->catta_servicetype);
+ if(pthread_mutex_lock(&mesh->discovery_mutex) != 0) {
+ abort();
+ }
+
// Start the discovery thread
if(pthread_create(&mesh->discovery_thread, NULL, discovery_loop, mesh) != 0) {
+ pthread_mutex_unlock(&mesh->discovery_mutex);
logger(mesh, MESHLINK_ERROR, "Could not start discovery thread: %s\n", strerror(errno));
memset(&mesh->discovery_thread, 0, sizeof(mesh)->discovery_thread);
return false;
}
- pthread_mutex_lock(&mesh->discovery_mutex);
pthread_cond_wait(&mesh->discovery_cond, &mesh->discovery_mutex);
pthread_mutex_unlock(&mesh->discovery_mutex);
mesh->discovery_threadstarted = true;
+#if defined(__linux)
+ int sock = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
+
+ if(sock != -1) {
+ struct sockaddr_nl sa;
+ memset(&sa, 0, sizeof(sa));
+ sa.nl_family = AF_NETLINK;
+ sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR;
+
+ if(bind(sock, (struct sockaddr *)&sa, sizeof(sa)) != -1) {
+ io_add(&mesh->loop, &mesh->pfroute_io, netlink_io_handler, mesh, sock, IO_READ);
+ netlink_getlink(sock);
+ } else {
+ logger(mesh, MESHLINK_WARNING, "Could not bind AF_NETLINK socket: %s", strerror(errno));
+ }
+ } else {
+ logger(mesh, MESHLINK_WARNING, "Could not open AF_NETLINK socket: %s", strerror(errno));
+ }
+
+#elif defined(RTM_NEWADDR)
+ int sock = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC);
+
+ if(sock != -1) {
+ io_add(&mesh->loop, &mesh->pfroute_io, pfroute_io_handler, mesh, sock, IO_READ);
+ } else {
+ logger(mesh, MESHLINK_WARNING, "Could not open PF_ROUTE socket: %s", strerror(errno));
+ }
+
+#endif
+
return true;
}
assert(mesh);
+ free(mesh->discovery_ifaces);
+ free(mesh->discovery_addresses);
+ mesh->discovery_iface_count = 0;
+ mesh->discovery_address_count = 0;
+
+ if(mesh->pfroute_io.cb) {
+ close(mesh->pfroute_io.fd);
+ io_del(&mesh->loop, &mesh->pfroute_io);
+ }
+
// Shut down
if(mesh->catta_poll) {
catta_simple_poll_quit(mesh->catta_poll);
// Wait for the discovery thread to finish
if(mesh->discovery_threadstarted == true) {
- pthread_join(mesh->discovery_thread, NULL);
+ if(pthread_join(mesh->discovery_thread, NULL) != 0) {
+ abort();
+ }
+
mesh->discovery_threadstarted = false;
}
projects / meshlink / blobdiff