#include "splay_tree.h"
#include "cipher.h"
#include "conf.h"
+#include "control_common.h"
#include "list.h"
#include "logger.h"
#include "net.h" /* Don't ask. */
splay_delete(connection_tree, c);
}
-int dump_connections(struct evbuffer *out) {
+bool dump_connections(connection_t *cdump) {
splay_node_t *node;
connection_t *c;
for(node = connection_tree->head; node; node = node->next) {
c = node->data;
- if(evbuffer_add_printf(out,
- " %s at %s options %x socket %d status %04x\n",
- c->name, c->hostname, c->options, c->socket,
- bitfield_to_int(&c->status, sizeof c->status)) == -1)
- return errno;
+ send_request(cdump, "%d %d %s at %s options %x socket %d status %04x",
+ CONTROL, REQ_DUMP_CONNECTIONS,
+ c->name, c->hostname, c->options, c->socket,
+ bitfield_to_int(&c->status, sizeof c->status));
}
- return 0;
+ return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
}
bool read_connection_config(connection_t *c) {
int encryptout:1; /* 1 if we can encrypt outgoing traffic */
int decryptin:1; /* 1 if we have to decrypt incoming traffic */
int mst:1; /* 1 if this connection is part of a minimum spanning tree */
- int unused:23;
+ int control:1;
+ int unused:22;
} connection_status_t;
#include "edge.h"
extern void free_connection(connection_t *);
extern void connection_add(connection_t *);
extern void connection_del(connection_t *);
-extern int dump_connections(struct evbuffer *);
+extern bool dump_connections(struct connection_t *);
extern bool read_connection_config(connection_t *);
#endif /* __TINC_CONNECTION_H__ */
*/
#include "system.h"
+#include "crypto.h"
#include "conf.h"
#include "control.h"
#include "control_common.h"
#include "graph.h"
#include "logger.h"
+#include "protocol.h"
#include "utils.h"
#include "xalloc.h"
static int control_socket = -1;
static struct event control_event;
static splay_tree_t *control_socket_tree;
-extern char *controlsocketname;
+char controlcookie[65];
+extern char *controlcookiename;
-static void handle_control_data(struct bufferevent *event, void *data) {
- tinc_ctl_request_t req;
- tinc_ctl_request_t res;
- struct evbuffer *res_data = NULL;
- void *req_data;
-
- if(EVBUFFER_LENGTH(event->input) < sizeof req)
- return;
-
- /* Copy the structure to ensure alignment */
- memcpy(&req, EVBUFFER_DATA(event->input), sizeof req);
-
- if(EVBUFFER_LENGTH(event->input) < req.length)
- return;
- req_data = EVBUFFER_DATA(event->input) + sizeof req;
+static bool control_return(connection_t *c, int type, int error) {
+ return send_request(c, "%d %d %d", CONTROL, type, error);
+}
- if(req.length < sizeof req)
- goto failure;
+static bool control_ok(connection_t *c, int type) {
+ return control_return(c, type, 0);
+}
- memset(&res, 0, sizeof res);
- res.type = req.type;
- res.id = req.id;
+bool control_h(connection_t *c, char *request) {
+ int type;
- res_data = evbuffer_new();
- if(res_data == NULL) {
- res.res_errno = ENOMEM;
- goto respond;
+ if(!c->status.control || c->allow_request != CONTROL) {
+ logger(LOG_ERR, "Unauthorized control request from %s (%s)", c->name, c->hostname);
+ return false;
}
- if(req.type == REQ_STOP) {
- logger(LOG_NOTICE, "Got '%s' command", "stop");
- event_loopexit(NULL);
- goto respond;
+ if(sscanf(request, "%*d %d", &type) != 1) {
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "CONTROL", c->name, c->hostname);
+ return false;
}
- if(req.type == REQ_DUMP_NODES) {
- logger(LOG_NOTICE, "Got '%s' command", "dump nodes");
- res.res_errno = dump_nodes(res_data);
- goto respond;
- }
+ switch (type) {
+ case REQ_STOP:
+ event_loopexit(NULL);
+ return control_ok(c, REQ_STOP);
- if(req.type == REQ_DUMP_EDGES) {
- logger(LOG_NOTICE, "Got '%s' command", "dump edges");
- res.res_errno = dump_edges(res_data);
- goto respond;
- }
+ case REQ_DUMP_NODES:
+ return dump_nodes(c);
+
+ case REQ_DUMP_EDGES:
+ return dump_edges(c);
- if(req.type == REQ_DUMP_SUBNETS) {
- logger(LOG_NOTICE, "Got '%s' command", "dump subnets");
- res.res_errno = dump_subnets(res_data);
- goto respond;
- }
+ case REQ_DUMP_SUBNETS:
+ return dump_subnets(c);
- if(req.type == REQ_DUMP_CONNECTIONS) {
- logger(LOG_NOTICE, "Got '%s' command", "dump connections");
- res.res_errno = dump_connections(res_data);
- goto respond;
- }
-
- if(req.type == REQ_DUMP_GRAPH) {
- logger(LOG_NOTICE, "Got '%s' command", "dump graph");
- res.res_errno = dump_graph(res_data);
- goto respond;
- }
+ case REQ_DUMP_CONNECTIONS:
+ return dump_connections(c);
- if(req.type == REQ_PURGE) {
- logger(LOG_NOTICE, "Got '%s' command", "purge");
- purge();
- goto respond;
- }
+ case REQ_PURGE:
+ purge();
+ return control_ok(c, REQ_PURGE);
- if(req.type == REQ_SET_DEBUG) {
- debug_t new_debug_level;
-
- logger(LOG_NOTICE, "Got '%s' command", "debug");
- if(req.length != sizeof req + sizeof debug_level)
- res.res_errno = EINVAL;
- else {
- memcpy(&new_debug_level, req_data, sizeof new_debug_level);
- logger(LOG_NOTICE, "Changing debug level from %d to %d",
- debug_level, new_debug_level);
- if(evbuffer_add_printf(res_data,
- "Changing debug level from %d to %d\n",
- debug_level, new_debug_level) == -1)
- res.res_errno = errno;
- debug_level = new_debug_level;
+ case REQ_SET_DEBUG: {
+ int new_level;
+ if(sscanf(request, "%*d %*d %d", &new_level) != 1)
+ return false;
+ send_request(c, "%d %d %d", CONTROL, REQ_SET_DEBUG, debug_level);
+ if(new_level >= 0)
+ debug_level = new_level;
+ return true;
}
- goto respond;
- }
-
- if(req.type == REQ_RETRY) {
- logger(LOG_NOTICE, "Got '%s' command", "retry");
- retry();
- goto respond;
- }
-
- if(req.type == REQ_RELOAD) {
- logger(LOG_NOTICE, "Got '%s' command", "reload");
- res.res_errno = reload_configuration();
- goto respond;
- }
-
- logger(LOG_DEBUG, "Malformed control command received");
- res.res_errno = EINVAL;
-
-respond:
- res.length = (sizeof res)
- + ((res_data == NULL) ? 0 : EVBUFFER_LENGTH(res_data));
- evbuffer_drain(event->input, req.length);
- if(bufferevent_write(event, &res, sizeof res) == -1)
- goto failure;
- if(res_data != NULL) {
- if(bufferevent_write_buffer(event, res_data) == -1)
- goto failure;
- evbuffer_free(res_data);
- }
- return;
-
-failure:
- logger(LOG_INFO, "Closing control socket on error");
- evbuffer_free(res_data);
- close(event->ev_read.ev_fd);
- splay_delete(control_socket_tree, event);
-}
-static void handle_control_error(struct bufferevent *event, short what, void *data) {
- if(what & EVBUFFER_EOF)
- logger(LOG_DEBUG, "Control socket connection closed by peer");
- else
- logger(LOG_DEBUG, "Error while reading from control socket: %s", strerror(errno));
+ case REQ_RETRY:
+ retry();
+ return control_ok(c, REQ_RETRY);
- close(event->ev_read.ev_fd);
- splay_delete(control_socket_tree, event);
-}
-
-static void handle_new_control_socket(int fd, short events, void *data) {
- int newfd;
- struct bufferevent *ev;
- tinc_ctl_greeting_t greeting;
-
- newfd = accept(fd, NULL, NULL);
-
- if(newfd < 0) {
- logger(LOG_ERR, "Accepting a new connection failed: %s", strerror(errno));
- event_del(&control_event);
- return;
- }
-
- ev = bufferevent_new(newfd, handle_control_data, NULL, handle_control_error, NULL);
- if(!ev) {
- logger(LOG_ERR, "Could not create bufferevent for new control connection: %s", strerror(errno));
- close(newfd);
- return;
- }
+ case REQ_RELOAD:
+ logger(LOG_NOTICE, "Got '%s' command", "reload");
+ int result = reload_configuration();
+ return control_return(c, REQ_RELOAD, result);
- memset(&greeting, 0, sizeof greeting);
- greeting.version = TINC_CTL_VERSION_CURRENT;
- greeting.pid = getpid();
- if(bufferevent_write(ev, &greeting, sizeof greeting) == -1) {
- logger(LOG_ERR,
- "Cannot send greeting for new control connection: %s",
- strerror(errno));
- bufferevent_free(ev);
- close(newfd);
- return;
+ default:
+ return send_request(c, "%d %d", CONTROL, REQ_INVALID);
}
-
- bufferevent_enable(ev, EV_READ);
- splay_insert(control_socket_tree, ev);
-
- logger(LOG_DEBUG, "Control socket connection accepted");
-}
-
-static int control_compare(const struct event *a, const struct event *b) {
- return a < b ? -1 : a > b ? 1 : 0;
}
bool init_control() {
- int result;
+ randomize(controlcookie, sizeof controlcookie / 2);
+ bin2hex(controlcookie, controlcookie, sizeof controlcookie / 2);
+ controlcookie[sizeof controlcookie - 1] = 0;
-#ifdef HAVE_MINGW
- struct sockaddr_in addr;
- memset(&addr, 0, sizeof addr);
- addr.sin_family = AF_INET;
- addr.sin_addr.s_addr = htonl(0x7f000001);
- addr.sin_port = htons(55555);
- int option = 1;
-
- control_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
- if(control_socket < 0) {
- logger(LOG_ERR, "Creating control socket failed: %s", sockstrerror(sockerrno));
- goto bail;
+ FILE *f = fopen(controlcookiename, "w");
+ if(!f) {
+ logger(LOG_ERR, "Cannot write control socket cookie file %s: %s", controlcookiename, strerror(errno));
+ return false;
}
- setsockopt(control_socket, SOL_SOCKET, SO_REUSEADDR, &option, sizeof option);
+#ifdef HAVE_FCHMOD
+ fchmod(f, 0600);
#else
- struct sockaddr_un addr;
- char *lastslash;
-
- if(strlen(controlsocketname) >= sizeof addr.sun_path) {
- logger(LOG_ERR, "Control socket filename too long!");
- goto bail;
- }
-
- memset(&addr, 0, sizeof addr);
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
-
- control_socket = socket(PF_UNIX, SOCK_STREAM, 0);
-
- if(control_socket < 0) {
- logger(LOG_ERR, "Creating UNIX socket failed: %s", strerror(errno));
- goto bail;
- }
-
- /*
- * Restrict connections to our control socket by ensuring the parent
- * directory can be traversed only by root. Note this is not totally
- * race-free unless all ancestors are writable only by trusted users,
- * which we don't verify.
- */
-
- struct stat statbuf;
- lastslash = strrchr(controlsocketname, '/');
- if(lastslash != NULL) {
- *lastslash = 0; /* temporarily change controlsocketname to be dir */
- if(mkdir(controlsocketname, 0700) < 0 && errno != EEXIST) {
- logger(LOG_ERR, "Unable to create control socket directory %s: %s", controlsocketname, strerror(errno));
- *lastslash = '/';
- goto bail;
- }
-
- result = stat(controlsocketname, &statbuf);
- *lastslash = '/';
- } else
- result = stat(".", &statbuf);
-
- if(result < 0) {
- logger(LOG_ERR, "Examining control socket directory failed: %s", strerror(errno));
- goto bail;
- }
-
- if(statbuf.st_uid != 0 || (statbuf.st_mode & S_IXOTH) != 0 || (statbuf.st_gid != 0 && (statbuf.st_mode & S_IXGRP)) != 0) {
- logger(LOG_ERR, "Control socket directory ownership/permissions insecure.");
- goto bail;
- }
+ chmod(controlcookiename, 0600);
#endif
- result = bind(control_socket, (struct sockaddr *)&addr, sizeof addr);
-
- if(result < 0 && sockinuse(sockerrno)) {
-#ifndef HAVE_MINGW
- result = connect(control_socket, (struct sockaddr *)&addr, sizeof addr);
- if(result < 0) {
- logger(LOG_WARNING, "Removing old control socket.");
- unlink(controlsocketname);
- result = bind(control_socket, (struct sockaddr *)&addr, sizeof addr);
- } else
-#endif
- {
- if(netname)
- logger(LOG_ERR, "Another tincd is already running for net `%s'.", netname);
- else
- logger(LOG_ERR, "Another tincd is already running.");
- goto bail;
- }
- }
+ fprintf(f, "%s %s %d\n", controlcookie, myport, getpid());
+ fclose(f);
- if(result < 0) {
- logger(LOG_ERR, "Can't bind to %s: %s", controlsocketname, strerror(errno));
- goto bail;
- }
-
- if(listen(control_socket, 3) < 0) {
- logger(LOG_ERR, "Can't listen on %s: %s", controlsocketname, strerror(errno));
- goto bail;
- }
-
- control_socket_tree = splay_alloc_tree((splay_compare_t)control_compare, (splay_action_t)bufferevent_free);
-
- event_set(&control_event, control_socket, EV_READ | EV_PERSIST, handle_new_control_socket, NULL);
- event_add(&control_event, NULL);
return true;
-
-bail:
- if(control_socket != -1) {
- closesocket(control_socket);
- control_socket = -1;
- }
- return false;
}
void exit_control() {
- event_del(&control_event);
- closesocket(control_socket);
- unlink(controlsocketname);
+ unlink(controlcookiename);
}
extern bool init_control();
extern void exit_control();
+extern char controlcookie[];
#endif
#ifndef __TINC_CONTROL_PROTOCOL_H__
#define __TINC_CONTROL_PROTOCOL_H__
+#include "protocol.h"
+
enum request_type {
- REQ_STOP,
+ REQ_INVALID = -1,
+ REQ_STOP = 0,
REQ_RELOAD,
REQ_RESTART,
REQ_DUMP_NODES,
#define TINC_CTL_VERSION_CURRENT 0
-/* This greeting is sent by the server on socket open. */
-typedef struct tinc_ctl_greeting_t {
- int version;
- pid_t pid;
-} tinc_ctl_greeting_t;
-
-/* A single request or response header. */
-typedef struct tinc_ctl_request_t {
- size_t length; /* total length, including the header */
- enum request_type type;
- int id;
- int res_errno; /* used only for responses */
-} tinc_ctl_request_t;
-
#endif
#include "system.h"
#include "splay_tree.h"
+#include "control_common.h"
#include "edge.h"
#include "logger.h"
#include "netutl.h"
return splay_search(from->edge_tree, &v);
}
-int dump_edges(struct evbuffer *out) {
+bool dump_edges(connection_t *c) {
splay_node_t *node, *node2;
node_t *n;
edge_t *e;
for(node2 = n->edge_tree->head; node2; node2 = node2->next) {
e = node2->data;
address = sockaddr2hostname(&e->address);
- if(evbuffer_add_printf(out,
- " %s to %s at %s options %x weight %d\n",
- e->from->name, e->to->name, address,
- e->options, e->weight) == -1) {
- free(address);
- return errno;
- }
+ send_request(c, "%d %d %s to %s at %s options %x weight %d",
+ CONTROL, REQ_DUMP_EDGES,
+ e->from->name, e->to->name, address,
+ e->options, e->weight);
free(address);
}
}
- return 0;
+ return send_request(c, "%d %d", CONTROL, REQ_DUMP_EDGES);
}
extern void edge_add(edge_t *);
extern void edge_del(edge_t *);
extern edge_t *lookup_edge(struct node_t *, struct node_t *);
-extern int dump_edges(struct evbuffer *);
+extern bool dump_edges(struct connection_t *);
#endif /* __TINC_EDGE_H__ */
}
}
-/* Dump nodes and edges to a graphviz file.
-
- The file can be converted to an image with
- dot -Tpng graph_filename -o image_filename.png -Gconcentrate=true
-*/
-
-int dump_graph(struct evbuffer *out) {
- splay_node_t *node;
- node_t *n;
- edge_t *e;
-
- if(evbuffer_add_printf(out, "digraph {\n") == -1)
- return errno;
-
- /* dump all nodes first */
- for(node = node_tree->head; node; node = node->next) {
- n = node->data;
- if(evbuffer_add_printf(out, " %s [label = \"%s\"];\n",
- n->name, n->name) == -1)
- return errno;
- }
-
- /* now dump all edges */
- for(node = edge_weight_tree->head; node; node = node->next) {
- e = node->data;
- if(evbuffer_add_printf(out, " %s -> %s;\n",
- e->from->name, e->to->name) == -1)
- return errno;
- }
-
- if(evbuffer_add_printf(out, "}\n") == -1)
- return errno;
-
- return 0;
-}
-
void graph(void) {
- subnet_cache_flush();
+ subnet_cache_flush();
sssp_dijkstra();
check_reachability();
mst_kruskal();
extern void graph(void);
extern void mst_kruskal(void);
extern void sssp_bfs(void);
-extern int dump_graph(struct evbuffer *);
#endif /* __TINC_GRAPH_H__ */
#include "system.h"
+#include "control_common.h"
#include "splay_tree.h"
#include "logger.h"
#include "net.h"
}
}
-int dump_nodes(struct evbuffer *out) {
+bool dump_nodes(connection_t *c) {
splay_node_t *node;
node_t *n;
for(node = node_tree->head; node; node = node->next) {
n = node->data;
- if(evbuffer_add_printf(out, " %s at %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)\n",
+ send_request(c, "%d %d %s at %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)", CONTROL, REQ_DUMP_NODES,
n->name, n->hostname, cipher_get_nid(&n->outcipher),
digest_get_nid(&n->outdigest), digest_length(&n->outdigest), n->outcompression,
n->options, bitfield_to_int(&n->status, sizeof n->status), n->nexthop ? n->nexthop->name : "-",
- n->via ? n->via->name : "-", n->distance, n->mtu, n->minmtu, n->maxmtu) == -1)
- return errno;
+ n->via ? n->via->name : "-", n->distance, n->mtu, n->minmtu, n->maxmtu);
}
- return 0;
+ return send_request(c, "%d %d", CONTROL, REQ_DUMP_NODES);
}
extern void node_del(node_t *);
extern node_t *lookup_node(char *);
extern node_t *lookup_node_udp(const sockaddr_t *);
-extern int dump_nodes(struct evbuffer *);
+extern bool dump_nodes(struct connection_t *);
extern void update_node_udp(node_t *, const sockaddr_t *);
#endif /* __TINC_NODE_H__ */
ping_h, pong_h,
add_subnet_h, del_subnet_h,
add_edge_h, del_edge_h,
- key_changed_h, req_key_h, ans_key_h, tcppacket_h,
+ key_changed_h, req_key_h, ans_key_h, tcppacket_h, control_h,
};
/* Request names */
"STATUS", "ERROR", "TERMREQ",
"PING", "PONG",
"ADD_SUBNET", "DEL_SUBNET",
- "ADD_EDGE", "DEL_EDGE", "KEY_CHANGED", "REQ_KEY", "ANS_KEY", "PACKET",
+ "ADD_EDGE", "DEL_EDGE", "KEY_CHANGED", "REQ_KEY", "ANS_KEY", "PACKET", "CONTROL",
};
static splay_tree_t *past_request_tree;
ADD_EDGE, DEL_EDGE,
KEY_CHANGED, REQ_KEY, ANS_KEY,
PACKET,
+ CONTROL,
LAST /* Guardian for the highest request number */
} request_t;
extern bool req_key_h(struct connection_t *, char *);
extern bool ans_key_h(struct connection_t *, char *);
extern bool tcppacket_h(struct connection_t *, char *);
+extern bool control_h(struct connection_t *, char *);
#endif /* __TINC_PROTOCOL_H__ */
#include "splay_tree.h"
#include "conf.h"
#include "connection.h"
+#include "control.h"
+#include "control_common.h"
#include "crypto.h"
#include "edge.h"
#include "graph.h"
return false;
}
+ /* Check if this is a control connection */
+
+ if(name[0] == '^' && !strcmp(name + 1, controlcookie)) {
+ c->status.control = true;
+ c->allow_request = CONTROL;
+ c->last_ping_time = time(NULL) + 3600;
+ return send_request(c, "%d %d %d", ACK, TINC_CTL_VERSION_CURRENT, getpid());
+ }
+
/* Check if identity is a valid name */
if(!check_id(name)) {
#include "system.h"
#include "splay_tree.h"
+#include "control_common.h"
#include "device.h"
#include "logger.h"
#include "net.h"
bool net2str(char *netstr, int len, const subnet_t *subnet) {
if(!netstr || !subnet) {
- logger(LOG_ERR, "net2str() was called with netstr=%p, subnet=%p!\n", netstr, subnet);
+ logger(LOG_ERR, "net2str() was called with netstr=%p, subnet=%p!", netstr, subnet);
return false;
}
free(envp[i]);
}
-int dump_subnets(struct evbuffer *out) {
+bool dump_subnets(connection_t *c) {
char netstr[MAXNETSTR];
subnet_t *subnet;
splay_node_t *node;
subnet = node->data;
if(!net2str(netstr, sizeof netstr, subnet))
continue;
- if(evbuffer_add_printf(out, " %s owner %s\n",
- netstr, subnet->owner->name) == -1)
- return errno;
+ send_request(c, "%d %d %s owner %s",
+ CONTROL, REQ_DUMP_SUBNETS,
+ netstr, subnet->owner->name);
}
- return 0;
+ return send_request(c, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
}
extern subnet_t *lookup_subnet_mac(const mac_t *);
extern subnet_t *lookup_subnet_ipv4(const ipv4_t *);
extern subnet_t *lookup_subnet_ipv6(const ipv6_t *);
-extern int dump_subnets(struct evbuffer *);
+extern bool dump_subnets(struct connection_t *);
extern void subnet_cache_flush(void);
#endif /* __TINC_SUBNET_H__ */
/* If nonzero, generate public/private keypair for this host/net. */
int generate_keys = 0;
+static char *name = NULL;
static char *identname = NULL; /* program name for syslog */
-static char *controlsocketname = NULL; /* pid file location */
+static char *controlcookiename = NULL; /* cookie file location */
+static char controlcookie[1024];
char *netname = NULL;
char *confbase = NULL;
printf("Valid options are:\n"
" -c, --config=DIR Read configuration options from DIR.\n"
" -n, --net=NETNAME Connect to net NETNAME.\n"
- " --controlsocket=FILENAME Open control socket at FILENAME.\n"
+ " --controlcookie=FILENAME Read control socket from FILENAME.\n"
" --help Display this help and exit.\n"
" --version Output version information and exit.\n"
"\n"
break;
case 5: /* open control socket here */
- controlsocketname = xstrdup(optarg);
+ controlcookiename = xstrdup(optarg);
break;
case '?':
static bool keygen(int bits) {
rsa_t key;
FILE *f;
- char *name = NULL;
char *filename;
fprintf(stderr, "Generating %d bits keys:\n", bits);
xasprintf(&confbase, "%s", installdir);
}
}
+ if(!controlcookiename)
+ xasprintf(&controlcookiename, "%s/cookie", confbase);
RegCloseKey(key);
if(*installdir)
return;
}
#endif
- if(!controlsocketname)
- xasprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
+ if(!controlcookiename)
+ xasprintf(&controlcookiename, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
if(netname) {
if(!confbase)
}
}
-static int fullread(int fd, void *data, size_t datalen) {
- int rv, len = 0;
+static bool recvline(int fd, char *line, size_t len) {
+ static char buffer[4096];
+ static size_t blen = 0;
+ char *newline = NULL;
- while(len < datalen) {
- rv = recv(fd, data + len, datalen - len, 0);
- if(rv == -1 && errno == EINTR)
+ while(!(newline = memchr(buffer, '\n', blen))) {
+ int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
+ if(result == -1 && errno == EINTR)
continue;
- else if(rv == -1)
- return rv;
- else if(rv == 0) {
-#ifdef HAVE_MINGW
- errno = 0;
-#else
- errno = ENODATA;
-#endif
- return -1;
- }
- len += rv;
+ else if(result <= 0)
+ return false;
+ blen += result;
}
- return 0;
-}
-
-/*
- Send a request (raw)
-*/
-static int send_ctl_request(int fd, enum request_type type,
- void const *outdata, size_t outdatalen,
- int *res_errno_p, void **indata_p,
- size_t *indatalen_p) {
- tinc_ctl_request_t req;
- int rv;
- void *indata;
-
- memset(&req, 0, sizeof req);
- req.length = sizeof req + outdatalen;
- req.type = type;
- req.res_errno = 0;
-
-#ifdef HAVE_MINGW
- if(send(fd, (void *)&req, sizeof req, 0) != sizeof req || send(fd, outdata, outdatalen, 0) != outdatalen)
- return -1;
-#else
- struct iovec vector[2] = {
- {&req, sizeof req},
- {(void*) outdata, outdatalen}
- };
-
- if(res_errno_p == NULL)
- return -1;
- while((rv = writev(fd, vector, 2)) == -1 && errno == EINTR) ;
- if(rv != req.length)
- return -1;
-#endif
-
- if(fullread(fd, &req, sizeof req) == -1)
- return -1;
-
- if(req.length < sizeof req) {
- errno = EINVAL;
- return -1;
- }
+ if(newline - buffer >= len)
+ return false;
- if(req.length > sizeof req) {
- if(indata_p == NULL) {
- errno = EINVAL;
- return -1;
- }
+ len = newline - buffer;
- indata = xmalloc(req.length - sizeof req);
+ memcpy(line, buffer, len);
+ line[len] = 0;
+ memmove(buffer, newline + 1, blen - len - 1);
+ blen -= len + 1;
- if(fullread(fd, indata, req.length - sizeof req) == -1) {
- free(indata);
- return -1;
- }
+ return true;
+}
- *indata_p = indata;
- if(indatalen_p != NULL)
- *indatalen_p = req.length - sizeof req;
- }
+static bool sendline(int fd, char *format, ...) {
+ static char buffer[4096];
+ char *p = buffer;
+ size_t blen = 0;
+ va_list ap;
- *res_errno_p = req.res_errno;
+ va_start(ap, format);
+ blen = vsnprintf(buffer, sizeof buffer, format, ap);
+ va_end(ap);
- return 0;
-}
-
-/*
- Send a request (with printfs)
-*/
-static int send_ctl_request_cooked(int fd, enum request_type type, void const *outdata, size_t outdatalen) {
- int res_errno = -1;
- char *buf = NULL;
- size_t buflen = 0;
-
- if(send_ctl_request(fd, type, outdata, outdatalen, &res_errno,
- (void**) &buf, &buflen)) {
- fprintf(stderr, "Error sending request: %s\n", strerror(errno));
- return -1;
- }
+ if(blen < 0 || blen >= sizeof buffer)
+ return false;
- if(buf != NULL) {
- printf("%*s", (int)buflen, buf);
- free(buf);
- }
+ buffer[blen] = '\n';
+ blen++;
- if(res_errno != 0) {
- fprintf(stderr, "Server reported error: %s\n", strerror(res_errno));
- return -1;
+ while(blen) {
+ int result = send(fd, p, blen, 0);
+ if(result == -1 && errno == EINTR)
+ continue;
+ else if(result <= 0);
+ return false;
+ p += result;
+ blen -= result;
}
- return 0;
+ return true;
}
int main(int argc, char *argv[], char *envp[]) {
- tinc_ctl_greeting_t greeting;
int fd;
int result;
+ int port;
+ int pid;
program_name = argv[0];
* ancestors are writable only by trusted users, which we don't verify.
*/
+ FILE *f = fopen(controlcookiename, "r");
+ if(!f) {
+ fprintf(stderr, "Could not open control socket cookie file %s: %s\n", controlcookiename, strerror(errno));
+ return 1;
+ }
+ if(fscanf(f, "%1024s %d %d", controlcookie, &port, &pid) != 3) {
+ fprintf(stderr, "Could not parse control socket cookie file %s\n", controlcookiename);
+ return 1;
+ }
+
#ifdef HAVE_MINGW
if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
return 1;
}
+#endif
struct sockaddr_in addr;
memset(&addr, 0, sizeof addr);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(0x7f000001);
- addr.sin_port = htons(55555);
+ addr.sin_port = htons(port);
fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if(fd < 0) {
if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
}
-#else
- struct sockaddr_un addr;
- struct stat statbuf;
- char *lastslash = strrchr(controlsocketname, '/');
- if(lastslash != NULL) {
- /* control socket is not in cwd; stat its parent */
- *lastslash = 0;
- result = stat(controlsocketname, &statbuf);
- *lastslash = '/';
- } else
- result = stat(".", &statbuf);
-
- if(result < 0) {
- fprintf(stderr, "Unable to check control socket directory permissions: %s\n", strerror(errno));
- return 1;
- }
-
- if(statbuf.st_uid != 0 || (statbuf.st_mode & S_IXOTH) != 0 || (statbuf.st_gid != 0 && (statbuf.st_mode & S_IXGRP)) != 0) {
- fprintf(stderr, "Insecure permissions on control socket directory\n");
- return 1;
- }
-
- if(strlen(controlsocketname) >= sizeof addr.sun_path) {
- fprintf(stderr, "Control socket filename too long!\n");
- return 1;
- }
-
- fd = socket(PF_UNIX, SOCK_STREAM, 0);
- if(fd < 0) {
- fprintf(stderr, "Cannot create UNIX socket: %s\n", strerror(errno));
- return 1;
- }
-
- memset(&addr, 0, sizeof addr);
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
-#endif
if(connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0) {
- fprintf(stderr, "Cannot connect to %s: %s\n", controlsocketname, sockstrerror(sockerrno));
+ fprintf(stderr, "Cannot connect to %s: %s\n", controlcookiename, sockstrerror(sockerrno));
return 1;
}
- if(fullread(fd, &greeting, sizeof greeting) == -1) {
+ char line[4096];
+ char data[4096];
+ int code, version, req;
+
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
fprintf(stderr, "Cannot read greeting from control socket: %s\n",
sockstrerror(sockerrno));
return 1;
}
- if(greeting.version != TINC_CTL_VERSION_CURRENT) {
- fprintf(stderr, "Version mismatch: server %d, client %d\n",
- greeting.version, TINC_CTL_VERSION_CURRENT);
+ sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
+
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
+ fprintf(stderr, "Could not fully establish control socket connection\n");
return 1;
}
if(!strcasecmp(argv[optind], "pid")) {
- printf("%d\n", greeting.pid);
+ printf("%d\n", pid);
return 0;
}
if(!strcasecmp(argv[optind], "stop")) {
- return send_ctl_request_cooked(fd, REQ_STOP, NULL, 0) != -1;
+ sendline(fd, "%d %d", CONTROL, REQ_STOP);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_STOP || result) {
+ fprintf(stderr, "Could not stop tinc daemon\n");
+ return 1;
+ }
+ return 0;
}
if(!strcasecmp(argv[optind], "reload")) {
- return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+ sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
+ fprintf(stderr, "Could not reload tinc daemon\n");
+ return 1;
+ }
+ return 0;
}
-
+
if(!strcasecmp(argv[optind], "restart")) {
- return send_ctl_request_cooked(fd, REQ_RESTART, NULL, 0) != -1;
+ sendline(fd, "%d %d", CONTROL, REQ_RESTART);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RESTART || result) {
+ fprintf(stderr, "Could not restart tinc daemon\n");
+ return 1;
+ }
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "retry")) {
+ sendline(fd, "%d %d", CONTROL, REQ_RETRY);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
+ fprintf(stderr, "Could not retry outgoing connections\n");
+ return 1;
+ }
+ return 0;
}
if(!strcasecmp(argv[optind], "dump")) {
return 1;
}
- if(!strcasecmp(argv[optind+1], "nodes")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_NODES, NULL, 0) != -1;
- }
-
- if(!strcasecmp(argv[optind+1], "edges")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_EDGES, NULL, 0) != -1;
- }
-
- if(!strcasecmp(argv[optind+1], "subnets")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_SUBNETS, NULL, 0) != -1;
+ bool do_graph = false;
+ int dumps = 1;
+
+ if(!strcasecmp(argv[optind+1], "nodes"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ else if(!strcasecmp(argv[optind+1], "edges"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ else if(!strcasecmp(argv[optind+1], "subnets"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
+ else if(!strcasecmp(argv[optind+1], "connections"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
+ else if(!strcasecmp(argv[optind+1], "graph")) {
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ do_graph = true;
+ dumps = 2;
+ printf("digraph {\n");
+ } else {
+ fprintf(stderr, "Unknown dump type '%s'.\n", argv[optind+1]);
+ usage(true);
+ return 1;
}
- if(!strcasecmp(argv[optind+1], "connections")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_CONNECTIONS, NULL, 0) != -1;
- }
+ while(recvline(fd, line, sizeof line)) {
+ char node1[4096], node2[4096];
+ int n = sscanf(line, "%d %d %s to %s", &code, &req, &node1, &node2);
+ if(n == 2) {
+ if(do_graph && req == REQ_DUMP_NODES)
+ continue;
+ else {
+ if(do_graph)
+ printf("}\n");
+ return 0;
+ }
+ }
+ if(n < 2)
+ break;
- if(!strcasecmp(argv[optind+1], "graph")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_GRAPH, NULL, 0) != -1;
+ if(!do_graph)
+ printf("%s\n", line + 5);
+ else {
+ if(req == REQ_DUMP_NODES)
+ printf(" %s [label = \"%s\"];\n", node1, node1);
+ else
+ printf(" %s -> %s;\n", node1, node2);
+ }
}
- fprintf(stderr, "Unknown dump type '%s'.\n", argv[optind+1]);
- usage(true);
+ fprintf(stderr, "Error receiving dump\n");
return 1;
}
if(!strcasecmp(argv[optind], "purge")) {
- return send_ctl_request_cooked(fd, REQ_PURGE, NULL, 0) != -1;
+ sendline(fd, "%d %d", CONTROL, REQ_PURGE);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
+ fprintf(stderr, "Could not purge tinc daemon\n");
+ return 1;
+ }
+ return 0;
}
if(!strcasecmp(argv[optind], "debug")) {
- int debuglevel;
+ int debuglevel, origlevel;
if(argc != optind + 2) {
fprintf(stderr, "Invalid arguments.\n");
return 1;
}
debuglevel = atoi(argv[optind+1]);
- return send_ctl_request_cooked(fd, REQ_SET_DEBUG, &debuglevel,
- sizeof debuglevel) != -1;
- }
- if(!strcasecmp(argv[optind], "retry")) {
- return send_ctl_request_cooked(fd, REQ_RETRY, NULL, 0) != -1;
- }
+ sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
+ fprintf(stderr, "Could not purge tinc daemon\n");
+ return 1;
+ }
- if(!strcasecmp(argv[optind], "reload")) {
- return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+ fprintf(stderr, "Old level %d, new level %d\n", origlevel, debuglevel);
+ return 0;
}
fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);
bool use_logfile = false;
char *identname = NULL; /* program name for syslog */
-char *controlsocketname = NULL; /* control socket location */
char *logfilename = NULL; /* log file location */
+char *controlcookiename = NULL;
char **g_argv; /* a copy of the cmdline arguments */
static int status;
{"chroot", no_argument, NULL, 'R'},
{"user", required_argument, NULL, 'U'},
{"logfile", optional_argument, NULL, 4},
- {"controlsocket", required_argument, NULL, 5},
+ {"controlcookie", required_argument, NULL, 5},
{NULL, 0, NULL, 0}
};
" -n, --net=NETNAME Connect to net NETNAME.\n"
" -L, --mlock Lock tinc into main memory.\n"
" --logfile[=FILENAME] Write log entries to a logfile.\n"
- " --controlsocket=FILENAME Open control socket at FILENAME.\n"
+ " --controlcookie=FILENAME Write control socket cookie to FILENAME.\n"
" --bypass-security Disables meta protocol security, for debugging.\n"
" -R, --chroot chroot to NET dir at startup.\n"
" -U, --user=USER setuid to given USER at startup.\n" " --help Display this help and exit.\n"
break;
case 5: /* open control socket here */
- controlsocketname = xstrdup(optarg);
+ controlcookiename = xstrdup(optarg);
break;
case '?':
else
xasprintf(&confbase, "%s", installdir);
}
+ if(!controlcookiename)
+ xasprintf(&controlcookiename, "%s/cookie", confbase);
}
RegCloseKey(key);
if(*installdir)
}
#endif
- if(!controlsocketname)
- xasprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
-
if(!logfilename)
xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
static void free_names() {
if (identname) free(identname);
if (netname) free(netname);
- if (controlsocketname) free(controlsocketname);
+ if (controlcookiename) free(controlcookiename);
if (logfilename) free(logfilename);
if (confbase) free(confbase);
}
return 1;
}
- if(!init_control())
- return 1;
-
g_argv = argv;
init_configuration(&config_tree);
if(!setup_network())
goto end;
+ if(!init_control())
+ return 1;
+
/* Initiate all outgoing connections. */
try_outgoing_connections();
end:
logger(LOG_NOTICE, "Terminating");
-#ifndef HAVE_MINGW
exit_control();
-#endif
crypto_exit();
projects / meshlink / commitdiff