#include "utils.h"
#include "xalloc.h"
#include "random.h"
+#include "pidfile.h"
#include "ed25519/sha512.h"
p[strcspn(p, "\t ")] = 0;
if(!*port && !strcasecmp(line, "Port")) {
+ free(*port);
*port = xstrdup(q);
} else if(!*hostname && !strcasecmp(line, "Address")) {
+ free(*hostname);
*hostname = xstrdup(q);
if(*p) {
fclose(f);
}
-static char *get_my_hostname(void) {
+static bool get_my_hostname(char **out_address, char **out_port) {
char *hostname = NULL;
char *port = NULL;
char *hostport = NULL;
free(name);
name = NULL;
+ if(!port || (is_decimal(port) && atoi(port) == 0)) {
+ pidfile_t *pidfile = read_pidfile();
+
+ if(pidfile) {
+ free(port);
+ port = xstrdup(pidfile->port);
+ free(pidfile);
+ } else {
+ fprintf(stderr, "tincd is using a dynamic port and is not running. Please start tincd or set the Port option to a non-zero value.\n");
+ goto exit;
+ }
+ }
+
if(hostname) {
goto done;
}
if(!hostname) {
fprintf(stderr, "Could not determine the external address or hostname. Please set Address manually.\n");
free(port);
- return NULL;
+ return false;
}
goto save;
fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
free(hostname);
free(port);
- return NULL;
+ return false;
}
if(!rstrip(line)) {
}
}
+exit:
free(hostname);
+
+ if(hostport && port) {
+ *out_address = hostport;
+ *out_port = port;
+ return true;
+ }
+
+ free(hostport);
free(port);
- return hostport;
+ return false;
}
-static bool fcopy(FILE *out, const char *filename) {
+// Copy host configuration file, replacing Port with the value passed here. Host
+// configs may contain this clause: `Port = 0`, which means 'ask the operating
+// system to allocate any available port'. This obviously won't do for invitation
+// files, so replace it with an actual port we've obtained previously.
+static bool copy_config_replacing_port(FILE *out, const char *filename, const char *port) {
FILE *in = fopen(filename, "r");
if(!in) {
return false;
}
- char buf[1024];
- size_t len;
+ char line[1024];
+
+ while(fgets(line, sizeof(line), in)) {
+ const char *var_beg = line + strspn(line, "\t ");
+ const char *var_end = var_beg + strcspn(var_beg, "\t ");
- while((len = fread(buf, 1, sizeof(buf), in))) {
- fwrite(buf, len, 1, out);
+ // Check the name of the variable we've read. If it's Port, replace it with
+ // a port we'll use in invitation URL. Otherwise, just copy the line.
+ if(var_end > var_beg && !strncasecmp(var_beg, "Port", var_end - var_beg)) {
+ fprintf(out, "Port = %s\n", port);
+ } else {
+ fprintf(out, "%s", line);
+ }
}
fclose(in);
return true;
}
+static bool append_host_config(FILE *f, const char *nodename, const char *port) {
+ char path[PATH_MAX];
+ snprintf(path, sizeof(path), "%s" SLASH "hosts" SLASH "%s", confbase, nodename);
+ bool success = copy_config_replacing_port(f, path, port);
+ fclose(f);
+ return success;
+}
+
int cmd_invite(int argc, char *argv[]) {
if(argc < 2) {
fprintf(stderr, "Not enough arguments!\n");
}
// Get the local address
- char *address = get_my_hostname();
+ char *address = NULL;
+ char *port = NULL;
+
+ if(!get_my_hostname(&address, &port)) {
+ return 1;
+ }
// Fill in the details.
fprintf(f, "Name = %s\n", argv[1]);
fprintf(f, "#---------------------------------------------------------------#\n");
fprintf(f, "Name = %s\n", myname);
- char filename2[PATH_MAX];
- snprintf(filename2, sizeof(filename2), "%s" SLASH "hosts" SLASH "%s", confbase, myname);
- fcopy(f, filename2);
- fclose(f);
+ bool appended = append_host_config(f, myname, port);
+ free(port);
+
+ if(!appended) {
+ fprintf(stderr, "Could not append my config to invitation file: %s.\n", strerror(errno));
+ free(address);
+ return 1;
+ }
// Create an URL from the local address, key hash and cookie
char *url;
}
if(!netname) {
- netname = xstrdup(grep(data, "NetName"));
+ const char *net = grep(data, "NetName");
- if(netname && !check_netname(netname, true)) {
- fprintf(stderr, "Unsafe NetName found in invitation!\n");
- return false;
+ if(net) {
+ netname = xstrdup(net);
+
+ if(!check_netname(netname, true)) {
+ fprintf(stderr, "Unsafe NetName found in invitation!\n");
+ return false;
+ }
}
}