Socket platform_new_connection(SockAddr addr, char *hostname,
int port, int privport,
int oobinline, int nodelay, int keepalive,
Plug plug, Conf *conf)
{
char *cmd;
static const struct socket_function_table socket_fn_table = {
sk_localproxy_plug,
sk_localproxy_close,
sk_localproxy_write,
sk_localproxy_write_oob,
sk_localproxy_write_eof,
sk_localproxy_flush,
sk_localproxy_set_private_ptr,
sk_localproxy_get_private_ptr,
sk_localproxy_set_frozen,
sk_localproxy_socket_error
};
Local_Proxy_Socket ret;
int to_cmd_pipe[2], from_cmd_pipe[2], pid;
if (conf_get_int(conf, CONF_proxy_type) != PROXY_CMD)
return NULL;
cmd = format_telnet_command(addr, port, conf);
ret = snew(struct Socket_localproxy_tag);
ret->fn = &socket_fn_table;
ret->plug = plug;
ret->error = NULL;
ret->outgoingeof = EOF_NO;
bufchain_init(&ret->pending_input_data);
bufchain_init(&ret->pending_output_data);
/*
* Create the pipes to the proxy command, and spawn the proxy
* command process.
*/
if (pipe(to_cmd_pipe) < 0 ||
pipe(from_cmd_pipe) < 0) {
ret->error = dupprintf("pipe: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
}
cloexec(to_cmd_pipe[1]);
cloexec(from_cmd_pipe[0]);
pid = fork();
if (pid < 0) {
ret->error = dupprintf("fork: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
} else if (pid == 0) {
close(0);
close(1);
dup2(to_cmd_pipe[0], 0);
dup2(from_cmd_pipe[1], 1);
close(to_cmd_pipe[0]);
close(from_cmd_pipe[1]);
noncloexec(0);
noncloexec(1);
execl("/bin/sh", "sh", "-c", cmd, (void *)NULL);
_exit(255);
}
sfree(cmd);
close(to_cmd_pipe[0]);
close(from_cmd_pipe[1]);
ret->to_cmd = to_cmd_pipe[1];
ret->from_cmd = from_cmd_pipe[0];
if (!localproxy_by_fromfd)
localproxy_by_fromfd = newtree234(localproxy_fromfd_cmp);
if (!localproxy_by_tofd)
localproxy_by_tofd = newtree234(localproxy_tofd_cmp);
add234(localproxy_by_fromfd, ret);
add234(localproxy_by_tofd, ret);
uxsel_set(ret->from_cmd, 1, localproxy_select_result);
/* We are responsible for this and don't need it any more */
sk_addr_free(addr);
return (Socket) ret;
}
Socket platform_new_connection(SockAddr addr, char *hostname,
int port, int privport,
int oobinline, int nodelay, int keepalive,
Plug plug, const Config *cfg)
{
char *cmd;
static const struct socket_function_table socket_fn_table = {
sk_localproxy_plug,
sk_localproxy_close,
sk_localproxy_write,
sk_localproxy_write_oob,
sk_localproxy_flush,
sk_localproxy_set_private_ptr,
sk_localproxy_get_private_ptr,
sk_localproxy_set_frozen,
sk_localproxy_socket_error
};
Local_Proxy_Socket ret;
HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;
SECURITY_ATTRIBUTES sa;
STARTUPINFO si;
PROCESS_INFORMATION pi;
if (cfg->proxy_type != PROXY_CMD)
return NULL;
cmd = format_telnet_command(addr, port, cfg);
{
char *msg = dupprintf("Starting local proxy command: %s", cmd);
/* We're allowed to pass NULL here, because we're part of the Windows
* front end so we know logevent doesn't expect any data. */
logevent(NULL, msg);
sfree(msg);
}
ret = snew(struct Socket_localproxy_tag);
ret->fn = &socket_fn_table;
ret->plug = plug;
ret->error = NULL;
/*
* Create the pipes to the proxy command, and spawn the proxy
* command process.
*/
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = NULL; /* default */
sa.bInheritHandle = TRUE;
if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
ret->error = dupprintf("Unable to create pipes for proxy command");
return (Socket)ret;
}
if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
CloseHandle(us_from_cmd);
CloseHandle(cmd_to_us);
ret->error = dupprintf("Unable to create pipes for proxy command");
return (Socket)ret;
}
SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
si.cb = sizeof(si);
si.lpReserved = NULL;
si.lpDesktop = NULL;
si.lpTitle = NULL;
si.dwFlags = STARTF_USESTDHANDLES;
si.cbReserved2 = 0;
si.lpReserved2 = NULL;
si.hStdInput = cmd_from_us;
si.hStdOutput = cmd_to_us;
si.hStdError = NULL;
CreateProcess(NULL, cmd, NULL, NULL, TRUE,
CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
NULL, NULL, &si, &pi);
CloseHandle(cmd_from_us);
CloseHandle(cmd_to_us);
ret->to_cmd_H = us_to_cmd;
ret->from_cmd_H = us_from_cmd;
ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata,
ret, 0);
ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata,
ret, 0);
/* We are responsible for this and don't need it any more */
sk_addr_free(addr);
return (Socket) ret;
}
Socket platform_new_connection(SockAddr addr, const char *hostname,
int port, int privport,
int oobinline, int nodelay, int keepalive,
Plug plug, Conf *conf)
{
char *cmd;
static const struct socket_function_table socket_fn_table = {
sk_localproxy_plug,
sk_localproxy_close,
sk_localproxy_write,
sk_localproxy_write_oob,
sk_localproxy_write_eof,
sk_localproxy_flush,
sk_localproxy_set_frozen,
sk_localproxy_socket_error,
NULL, /* peer_info */
};
Local_Proxy_Socket ret;
int to_cmd_pipe[2], from_cmd_pipe[2], cmd_err_pipe[2], pid, proxytype;
proxytype = conf_get_int(conf, CONF_proxy_type);
if (proxytype != PROXY_CMD && proxytype != PROXY_FUZZ)
return NULL;
ret = snew(struct Socket_localproxy_tag);
ret->fn = &socket_fn_table;
ret->plug = plug;
ret->error = NULL;
ret->outgoingeof = EOF_NO;
bufchain_init(&ret->pending_input_data);
bufchain_init(&ret->pending_output_data);
bufchain_init(&ret->pending_error_data);
if (proxytype == PROXY_CMD) {
cmd = format_telnet_command(addr, port, conf);
if (flags & FLAG_STDERR) {
/* If we have a sensible stderr, the proxy command can
* send its own standard error there, so we won't
* interfere. */
cmd_err_pipe[0] = cmd_err_pipe[1] = -1;
} else {
/* If we don't have a sensible stderr, we should catch the
* proxy command's standard error to put in our event
* log. */
cmd_err_pipe[0] = cmd_err_pipe[1] = 0;
}
{
char *logmsg = dupprintf("Starting local proxy command: %s", cmd);
plug_log(plug, 2, NULL, 0, logmsg, 0);
sfree(logmsg);
}
/*
* Create the pipes to the proxy command, and spawn the proxy
* command process.
*/
if (pipe(to_cmd_pipe) < 0 ||
pipe(from_cmd_pipe) < 0 ||
(cmd_err_pipe[0] == 0 && pipe(cmd_err_pipe) < 0)) {
ret->error = dupprintf("pipe: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
}
cloexec(to_cmd_pipe[1]);
cloexec(from_cmd_pipe[0]);
if (cmd_err_pipe[0] >= 0)
cloexec(cmd_err_pipe[0]);
pid = fork();
if (pid < 0) {
ret->error = dupprintf("fork: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
} else if (pid == 0) {
close(0);
close(1);
dup2(to_cmd_pipe[0], 0);
dup2(from_cmd_pipe[1], 1);
close(to_cmd_pipe[0]);
close(from_cmd_pipe[1]);
if (cmd_err_pipe[0] >= 0) {
dup2(cmd_err_pipe[1], 2);
close(cmd_err_pipe[1]);
}
noncloexec(0);
noncloexec(1);
execl("/bin/sh", "sh", "-c", cmd, (void *)NULL);
_exit(255);
}
sfree(cmd);
close(to_cmd_pipe[0]);
close(from_cmd_pipe[1]);
if (cmd_err_pipe[0] >= 0)
close(cmd_err_pipe[1]);
ret->to_cmd = to_cmd_pipe[1];
ret->from_cmd = from_cmd_pipe[0];
ret->cmd_err = cmd_err_pipe[0];
} else {
cmd = format_telnet_command(addr, port, conf);
ret->to_cmd = open("/dev/null", O_WRONLY);
if (ret->to_cmd == -1) {
ret->error = dupprintf("/dev/null: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
}
ret->from_cmd = open(cmd, O_RDONLY);
if (ret->from_cmd == -1) {
ret->error = dupprintf("%s: %s", cmd, strerror(errno));
sfree(cmd);
return (Socket)ret;
}
sfree(cmd);
ret->cmd_err = -1;
}
if (!localproxy_by_fromfd)
localproxy_by_fromfd = newtree234(localproxy_fromfd_cmp);
if (!localproxy_by_tofd)
localproxy_by_tofd = newtree234(localproxy_tofd_cmp);
if (!localproxy_by_errfd)
localproxy_by_errfd = newtree234(localproxy_errfd_cmp);
add234(localproxy_by_fromfd, ret);
add234(localproxy_by_tofd, ret);
if (ret->cmd_err >= 0)
add234(localproxy_by_errfd, ret);
uxsel_set(ret->from_cmd, 1, localproxy_select_result);
if (ret->cmd_err >= 0)
uxsel_set(ret->cmd_err, 1, localproxy_select_result);
/* We are responsible for this and don't need it any more */
sk_addr_free(addr);
return (Socket) ret;
}
Socket platform_new_connection(SockAddr addr, const char *hostname,
int port, int privport,
int oobinline, int nodelay, int keepalive,
Plug plug, Conf *conf)
{
char *cmd;
HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;
SECURITY_ATTRIBUTES sa;
STARTUPINFO si;
PROCESS_INFORMATION pi;
if (conf_get_int(conf, CONF_proxy_type) != PROXY_CMD)
return NULL;
cmd = format_telnet_command(addr, port, conf);
/* We are responsible for this and don't need it any more */
sk_addr_free(addr);
{
char *msg = dupprintf("Starting local proxy command: %s", cmd);
/* We're allowed to pass NULL here, because we're part of the Windows
* front end so we know logevent doesn't expect any data. */
logevent(NULL, msg);
sfree(msg);
}
/*
* Create the pipes to the proxy command, and spawn the proxy
* command process.
*/
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = NULL; /* default */
sa.bInheritHandle = TRUE;
if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
Socket ret =
new_error_socket("Unable to create pipes for proxy command", plug);
sfree(cmd);
return ret;
}
if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
Socket ret =
new_error_socket("Unable to create pipes for proxy command", plug);
sfree(cmd);
CloseHandle(us_from_cmd);
CloseHandle(cmd_to_us);
return ret;
}
SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
si.cb = sizeof(si);
si.lpReserved = NULL;
si.lpDesktop = NULL;
si.lpTitle = NULL;
si.dwFlags = STARTF_USESTDHANDLES;
si.cbReserved2 = 0;
si.lpReserved2 = NULL;
si.hStdInput = cmd_from_us;
si.hStdOutput = cmd_to_us;
si.hStdError = NULL;
CreateProcess(NULL, cmd, NULL, NULL, TRUE,
CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
NULL, NULL, &si, &pi);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
sfree(cmd);
CloseHandle(cmd_from_us);
CloseHandle(cmd_to_us);
return make_handle_socket(us_to_cmd, us_from_cmd, plug, FALSE);
}
Socket platform_new_connection(SockAddr addr,
const char *hostname,
int port,
int privport,
int oobinline,
int nodelay,
int keepalive,
Plug plug,
Conf *conf)
{
char *cmd;
HANDLE us_to_cmd, cmd_from_us;
HANDLE us_from_cmd, cmd_to_us;
HANDLE us_from_cmd_err, cmd_err_to_us;
SECURITY_ATTRIBUTES sa;
STARTUPINFO si;
PROCESS_INFORMATION pi;
if (conf_get_int(conf, CONF_proxy_type) != PROXY_CMD)
return NULL;
cmd = format_telnet_command(addr, port, conf);
/* We are responsible for this and don't need it any more */
sk_addr_free(addr);
{
char *msg = dupprintf("Starting local proxy command: %s", cmd);
plug_log(plug, 2, NULL, 0, msg, 0);
sfree(msg);
}
/*
* Create the pipes to the proxy command, and spawn the proxy
* command process.
*/
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = NULL; /* default */
sa.bInheritHandle = TRUE;
if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
Socket ret =
new_error_socket("Unable to create pipes for proxy command", plug);
sfree(cmd);
return ret;
}
if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
Socket ret =
new_error_socket("Unable to create pipes for proxy command", plug);
sfree(cmd);
CloseHandle(us_from_cmd);
CloseHandle(cmd_to_us);
return ret;
}
if (flags & FLAG_STDERR) {
/* If we have a sensible stderr, the proxy command can send
* its own standard error there, so we won't interfere. */
us_from_cmd_err = cmd_err_to_us = NULL;
} else {
/* If we don't have a sensible stderr, we should catch the
* proxy command's standard error to put in our event log. */
if (!CreatePipe(&us_from_cmd_err, &cmd_err_to_us, &sa, 0)) {
Socket ret =
new_error_socket("Unable to create pipes for proxy command", plug);
sfree(cmd);
CloseHandle(us_from_cmd);
CloseHandle(cmd_to_us);
CloseHandle(us_to_cmd);
CloseHandle(cmd_from_us);
return ret;
}
}
SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
if (us_from_cmd_err != NULL)
SetHandleInformation(us_from_cmd_err, HANDLE_FLAG_INHERIT, 0);
si.cb = sizeof(si);
si.lpReserved = NULL;
si.lpDesktop = NULL;
si.lpTitle = NULL;
si.dwFlags = STARTF_USESTDHANDLES;
si.cbReserved2 = 0;
si.lpReserved2 = NULL;
si.hStdInput = cmd_from_us;
si.hStdOutput = cmd_to_us;
si.hStdError = cmd_err_to_us;
CreateProcess(NULL,
cmd,
NULL,
NULL,
TRUE,
CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
NULL,
NULL,
&si,
&pi);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
sfree(cmd);
CloseHandle(cmd_from_us);
CloseHandle(cmd_to_us);
if (cmd_err_to_us != NULL)
CloseHandle(cmd_err_to_us);
return make_handle_socket(
us_to_cmd, us_from_cmd, us_from_cmd_err, plug, FALSE);
}
