static void
meta_command(struct sockaddr_in *from, char *command)
{
Server *s;
char *cmd, *name, *dummy;
parse_connect(command, &cmd, &name, &dummy);
s = serv_name2server(name);
if (!strcmp(cmd + 1, "connect")) {
char buf[128];
Server *local;
if (!s) {
s = promiscuous_connect(from, name);
if (!s) {
return;
}
} else if (verify_servers && !verify_server(s, from)) {
return;
}
s->connected = 1;
s->last_msgid = -1;
writelog();
fprintf(stderr, "Server %s (%s %d) connected\n", s->name, s->hostname,
s->port);
local = serv_id2server(0);
sprintf(buf, "*connectok %s\n", local->name);
sendto(yo_sock, buf, strlen(buf), 0, (struct sockaddr *) from,
sizeof(*from));
connect_server(s->id);
} else if (!strcmp(cmd + 1, "connectok")) {
if (!s) {
s = promiscuous_connect(from, name);
if (!s) {
return;
}
} else if (verify_servers && !verify_server(s, from)) {
return;
}
s->connected = 1;
s->last_msgid = -1;
writelog();
fprintf(stderr, "Server %s (%s %d) connected ok\n", s->name,
s->hostname, s->port);
connect_server(s->id);
} else if (!strcmp(cmd + 1, "disconnect")) {
if (!s) {
return;
}
s->connected = 0;
writelog();
fprintf(stderr, "Server %s (%s %d) disconnected\n", s->name,
s->hostname, s->port);
disconnect_server(s->id);
} else {
if (!s) {
return;
}
writelog();
fprintf(stderr, "Unknown metacommand \"%s\" from server %s\n",
command, s->name);
}
}
int main(int argc, char **argv)
{
int opt;
char *domname = NULL;
libvchan_t *data_vchan = NULL;
int data_port;
int data_domain;
int msg_type;
int s;
int just_exec = 0;
int connect_existing = 0;
char *local_cmdline = NULL;
char *remote_cmdline = NULL;
char *request_id;
char *src_domain_name = NULL;
int src_domain_id = 0; /* if not -c given, the process is run in dom0 */
struct service_params svc_params;
while ((opt = getopt(argc, argv, "d:l:ec:tT")) != -1) {
switch (opt) {
case 'd':
domname = strdup(optarg);
break;
case 'l':
local_cmdline = strdup(optarg);
break;
case 'e':
just_exec = 1;
break;
case 'c':
parse_connect(optarg, &request_id, &src_domain_name, &src_domain_id);
connect_existing = 1;
is_service = 1;
break;
case 't':
replace_esc_stdout = 1;
break;
case 'T':
replace_esc_stderr = 1;
break;
default:
usage(argv[0]);
}
}
if (optind >= argc || !domname)
usage(argv[0]);
remote_cmdline = argv[optind];
register_exec_func(&do_exec);
if (just_exec + connect_existing + (local_cmdline != 0) > 1) {
fprintf(stderr, "ERROR: only one of -e, -l, -c can be specified\n");
usage(argv[0]);
}
if (strcmp(domname, "dom0") == 0 && !connect_existing) {
fprintf(stderr, "ERROR: when target domain is 'dom0', -c must be specified\n");
usage(argv[0]);
}
if (strcmp(domname, "dom0") == 0) {
if (connect_existing) {
msg_type = MSG_SERVICE_CONNECT;
strncpy(svc_params.ident, request_id, sizeof(svc_params.ident));
} else if (just_exec)
msg_type = MSG_JUST_EXEC;
else
msg_type = MSG_EXEC_CMDLINE;
assert(src_domain_name);
setenv("QREXEC_REMOTE_DOMAIN", src_domain_name, 1);
s = connect_unix_socket(src_domain_name);
negotiate_connection_params(s,
0, /* dom0 */
msg_type,
connect_existing ? (void*)&svc_params : (void*)remote_cmdline,
connect_existing ? sizeof(svc_params) : strlen(remote_cmdline) + 1,
&data_domain,
&data_port);
prepare_local_fds(remote_cmdline);
if (connect_existing)
data_vchan = libvchan_client_init(data_domain, data_port);
else {
data_vchan = libvchan_server_init(data_domain, data_port,
VCHAN_BUFFER_SIZE, VCHAN_BUFFER_SIZE);
while (data_vchan && libvchan_is_open(data_vchan) == VCHAN_WAITING)
libvchan_wait(data_vchan);
}
if (!data_vchan || !libvchan_is_open(data_vchan)) {
fprintf(stderr, "Failed to open data vchan connection\n");
do_exit(1);
}
if (handle_agent_handshake(data_vchan, connect_existing) < 0)
do_exit(1);
select_loop(data_vchan);
} else {
if (just_exec)
msg_type = MSG_JUST_EXEC;
else
msg_type = MSG_EXEC_CMDLINE;
s = connect_unix_socket(domname);
negotiate_connection_params(s,
src_domain_id,
msg_type,
remote_cmdline,
strlen(remote_cmdline) + 1,
&data_domain,
&data_port);
close(s);
setenv("QREXEC_REMOTE_DOMAIN", domname, 1);
prepare_local_fds(local_cmdline);
if (connect_existing) {
s = connect_unix_socket(src_domain_name);
send_service_connect(s, request_id, data_domain, data_port);
close(s);
} else {
data_vchan = libvchan_server_init(data_domain, data_port,
VCHAN_BUFFER_SIZE, VCHAN_BUFFER_SIZE);
if (!data_vchan) {
fprintf(stderr, "Failed to start data vchan server\n");
do_exit(1);
}
while (libvchan_is_open(data_vchan) == VCHAN_WAITING)
libvchan_wait(data_vchan);
if (!libvchan_is_open(data_vchan)) {
fprintf(stderr, "Failed to open data vchan connection\n");
do_exit(1);
}
if (handle_agent_handshake(data_vchan, 0) < 0)
do_exit(1);
select_loop(data_vchan);
}
}
return 0;
}