+/* $OpenBSD: channels.c,v 1.250 2006/04/16 00:48:52 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* Fake X11 authentication data. This is what the server will be sending us;
* we should replace any occurrences of this by the real data.
*/
-static char *x11_fake_data = NULL;
+static u_char *x11_fake_data = NULL;
static u_int x11_fake_data_len;
if ((c = channel_by_id(id)) == NULL)
return (NULL);
- switch(c->type) {
+ switch (c->type) {
case SSH_CHANNEL_X11_OPEN:
case SSH_CHANNEL_LARVAL:
case SSH_CHANNEL_CONNECTING:
case SSH_CHANNEL_INPUT_DRAINING:
case SSH_CHANNEL_OUTPUT_DRAINING:
return (c);
- break;
}
logit("Non-public channel %d, type %d.", id, c->type);
return (NULL);
* Register filedescriptors for a channel, used when allocating a channel or
* when the channel consumer/producer is ready, e.g. shell exec'd
*/
-
static void
channel_register_fds(Channel *c, int rfd, int wfd, int efd,
int extusage, int nonblock)
* Allocate a new channel object and set its type and socket. This will cause
* remote_name to be freed.
*/
-
Channel *
channel_new(char *ctype, int type, int rfd, int wfd, int efd,
u_int window, u_int maxpack, int extusage, char *remote_name, int nonblock)
/* Do initial allocation if this is the first call. */
if (channels_alloc == 0) {
channels_alloc = 10;
- channels = xmalloc(channels_alloc * sizeof(Channel *));
+ channels = xcalloc(channels_alloc, sizeof(Channel *));
for (i = 0; i < channels_alloc; i++)
channels[i] = NULL;
}
if (channels_alloc > 10000)
fatal("channel_new: internal error: channels_alloc %d "
"too big.", channels_alloc);
- channels = xrealloc(channels,
- (channels_alloc + 10) * sizeof(Channel *));
+ channels = xrealloc(channels, channels_alloc + 10,
+ sizeof(Channel *));
channels_alloc += 10;
debug2("channel: expanding %d", channels_alloc);
for (i = found; i < channels_alloc; i++)
channels[i] = NULL;
}
/* Initialize and return new channel. */
- c = channels[found] = xmalloc(sizeof(Channel));
- memset(c, 0, sizeof(Channel));
+ c = channels[found] = xcalloc(1, sizeof(Channel));
buffer_init(&c->input);
buffer_init(&c->output);
buffer_init(&c->extended);
}
/* Close all channel fd/socket. */
-
static void
channel_close_fds(Channel *c)
{
}
/* Free the channel and close its fd/socket. */
-
void
channel_free(Channel *c)
{
* Closes the sockets/fds of all channels. This is used to close extra file
* descriptors after a fork.
*/
-
void
channel_close_all(void)
{
/*
* Stop listening to channels.
*/
-
void
channel_stop_listening(void)
{
* Returns true if no channel has too much buffered data, and false if one or
* more channel is overfull.
*/
-
int
channel_not_very_much_buffered_data(void)
{
}
/* Returns true if any channel is still open. */
-
int
channel_still_open(void)
{
}
/* Returns the id of an open channel suitable for keepaliving */
-
int
channel_find_open(void)
{
* suitable for sending to the client. The message contains crlf pairs for
* newlines.
*/
-
char *
channel_open_message(void)
{
packet_put_cstring(service);
packet_put_char(wantconfirm);
}
+
void
channel_register_confirm(int id, channel_callback_fn *fn, void *ctx)
{
c->confirm = fn;
c->confirm_ctx = ctx;
}
+
void
channel_register_cleanup(int id, channel_callback_fn *fn, int do_close)
{
c->detach_user = fn;
c->detach_close = do_close;
}
+
void
channel_cancel_cleanup(int id)
{
c->detach_user = NULL;
c->detach_close = 0;
}
+
void
channel_register_filter(int id, channel_infilter_fn *ifn,
channel_outfilter_fn *ofn)
* 'channel_post*': perform any appropriate operations for channels which
* have events pending.
*/
-typedef void chan_fn(Channel *c, fd_set * readset, fd_set * writeset);
+typedef void chan_fn(Channel *c, fd_set *readset, fd_set *writeset);
chan_fn *channel_pre[SSH_CHANNEL_MAX_TYPE];
chan_fn *channel_post[SSH_CHANNEL_MAX_TYPE];
static void
-channel_pre_listener(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_listener(Channel *c, fd_set *readset, fd_set *writeset)
{
FD_SET(c->sock, readset);
}
static void
-channel_pre_connecting(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_connecting(Channel *c, fd_set *readset, fd_set *writeset)
{
debug3("channel %d: waiting for connection", c->self);
FD_SET(c->sock, writeset);
}
static void
-channel_pre_open_13(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_open_13(Channel *c, fd_set *readset, fd_set *writeset)
{
if (buffer_len(&c->input) < packet_get_maxsize())
FD_SET(c->sock, readset);
}
static void
-channel_pre_open(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_open(Channel *c, fd_set *readset, fd_set *writeset)
{
u_int limit = compat20 ? c->remote_window : packet_get_maxsize();
- /* check buffer limits */
- limit = MIN(limit, (BUFFER_MAX_LEN - BUFFER_MAX_CHUNK - CHAN_RBUF));
-
if (c->istate == CHAN_INPUT_OPEN &&
limit > 0 &&
- buffer_len(&c->input) < limit)
+ buffer_len(&c->input) < limit &&
+ buffer_check_alloc(&c->input, CHAN_RBUF))
FD_SET(c->rfd, readset);
if (c->ostate == CHAN_OUTPUT_OPEN ||
c->ostate == CHAN_OUTPUT_WAIT_DRAIN) {
}
static void
-channel_pre_input_draining(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_input_draining(Channel *c, fd_set *readset, fd_set *writeset)
{
if (buffer_len(&c->input) == 0) {
packet_start(SSH_MSG_CHANNEL_CLOSE);
}
static void
-channel_pre_output_draining(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_output_draining(Channel *c, fd_set *readset, fd_set *writeset)
{
if (buffer_len(&c->output) == 0)
chan_mark_dead(c);
}
static void
-channel_pre_x11_open_13(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_x11_open_13(Channel *c, fd_set *readset, fd_set *writeset)
{
int ret = x11_open_helper(&c->output);
}
static void
-channel_pre_x11_open(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_x11_open(Channel *c, fd_set *readset, fd_set *writeset)
{
int ret = x11_open_helper(&c->output);
/* try to decode a socks4 header */
static int
-channel_decode_socks4(Channel *c, fd_set * readset, fd_set * writeset)
+channel_decode_socks4(Channel *c, fd_set *readset, fd_set *writeset)
{
char *p, *host;
u_int len, have, i, found;
s4_rsp.command = 90; /* cd: req granted */
s4_rsp.dest_port = 0; /* ignored */
s4_rsp.dest_addr.s_addr = INADDR_ANY; /* ignored */
- buffer_append(&c->output, (char *)&s4_rsp, sizeof(s4_rsp));
+ buffer_append(&c->output, &s4_rsp, sizeof(s4_rsp));
return 1;
}
#define SSH_SOCKS5_SUCCESS 0x00
static int
-channel_decode_socks5(Channel *c, fd_set * readset, fd_set * writeset)
+channel_decode_socks5(Channel *c, fd_set *readset, fd_set *writeset)
{
struct {
u_int8_t version;
debug2("channel %d: socks5 post auth", c->self);
if (have < sizeof(s5_req)+1)
return 0; /* need more */
- memcpy((char *)&s5_req, p, sizeof(s5_req));
+ memcpy(&s5_req, p, sizeof(s5_req));
if (s5_req.version != 0x05 ||
s5_req.command != SSH_SOCKS5_CONNECT ||
s5_req.reserved != 0x00) {
((struct in_addr *)&dest_addr)->s_addr = INADDR_ANY;
dest_port = 0; /* ignored */
- buffer_append(&c->output, (char *)&s5_rsp, sizeof(s5_rsp));
- buffer_append(&c->output, (char *)&dest_addr, sizeof(struct in_addr));
- buffer_append(&c->output, (char *)&dest_port, sizeof(dest_port));
+ buffer_append(&c->output, &s5_rsp, sizeof(s5_rsp));
+ buffer_append(&c->output, &dest_addr, sizeof(struct in_addr));
+ buffer_append(&c->output, &dest_port, sizeof(dest_port));
return 1;
}
/* dynamic port forwarding */
static void
-channel_pre_dynamic(Channel *c, fd_set * readset, fd_set * writeset)
+channel_pre_dynamic(Channel *c, fd_set *readset, fd_set *writeset)
{
u_char *p;
u_int have;
/* This is our fake X11 server socket. */
static void
-channel_post_x11_listener(Channel *c, fd_set * readset, fd_set * writeset)
+channel_post_x11_listener(Channel *c, fd_set *readset, fd_set *writeset)
{
Channel *nc;
struct sockaddr addr;
* This socket is listening for connections to a forwarded TCP/IP port.
*/
static void
-channel_post_port_listener(Channel *c, fd_set * readset, fd_set * writeset)
+channel_post_port_listener(Channel *c, fd_set *readset, fd_set *writeset)
{
Channel *nc;
struct sockaddr addr;
* clients.
*/
static void
-channel_post_auth_listener(Channel *c, fd_set * readset, fd_set * writeset)
+channel_post_auth_listener(Channel *c, fd_set *readset, fd_set *writeset)
{
Channel *nc;
int newsock;
}
static void
-channel_post_connecting(Channel *c, fd_set * readset, fd_set * writeset)
+channel_post_connecting(Channel *c, fd_set *readset, fd_set *writeset)
{
int err = 0;
socklen_t sz = sizeof(err);
}
static int
-channel_handle_rfd(Channel *c, fd_set * readset, fd_set * writeset)
+channel_handle_rfd(Channel *c, fd_set *readset, fd_set *writeset)
{
char buf[CHAN_RBUF];
int len;
}
return 1;
}
+
static int
-channel_handle_wfd(Channel *c, fd_set * readset, fd_set * writeset)
+channel_handle_wfd(Channel *c, fd_set *readset, fd_set *writeset)
{
struct termios tio;
u_char *data = NULL, *buf;
}
return 1;
}
+
static int
-channel_handle_efd(Channel *c, fd_set * readset, fd_set * writeset)
+channel_handle_efd(Channel *c, fd_set *readset, fd_set *writeset)
{
char buf[CHAN_RBUF];
int len;
}
return 1;
}
+
static int
-channel_handle_ctl(Channel *c, fd_set * readset, fd_set * writeset)
+channel_handle_ctl(Channel *c, fd_set *readset, fd_set *writeset)
{
char buf[16];
int len;
}
return 1;
}
+
static int
channel_check_window(Channel *c)
{
}
static void
-channel_post_open(Channel *c, fd_set * readset, fd_set * writeset)
+channel_post_open(Channel *c, fd_set *readset, fd_set *writeset)
{
if (c->delayed)
return;
}
static void
-channel_post_output_drain_13(Channel *c, fd_set * readset, fd_set * writeset)
+channel_post_output_drain_13(Channel *c, fd_set *readset, fd_set *writeset)
{
int len;
}
static void
-channel_handler(chan_fn *ftab[], fd_set * readset, fd_set * writeset)
+channel_handler(chan_fn *ftab[], fd_set *readset, fd_set *writeset)
{
static int did_init = 0;
u_int i;
channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp,
u_int *nallocp, int rekeying)
{
- u_int n, sz;
+ u_int n, sz, nfdset;
n = MAX(*maxfdp, channel_max_fd);
- sz = howmany(n+1, NFDBITS) * sizeof(fd_mask);
+ nfdset = howmany(n+1, NFDBITS);
+ /* Explicitly test here, because xrealloc isn't always called */
+ if (nfdset && SIZE_T_MAX / nfdset < sizeof(fd_mask))
+ fatal("channel_prepare_select: max_fd (%d) is too large", n);
+ sz = nfdset * sizeof(fd_mask);
+
/* perhaps check sz < nalloc/2 and shrink? */
if (*readsetp == NULL || sz > *nallocp) {
- *readsetp = xrealloc(*readsetp, sz);
- *writesetp = xrealloc(*writesetp, sz);
+ *readsetp = xrealloc(*readsetp, nfdset, sizeof(fd_mask));
+ *writesetp = xrealloc(*writesetp, nfdset, sizeof(fd_mask));
*nallocp = sz;
}
*maxfdp = n;
* events pending.
*/
void
-channel_after_select(fd_set * readset, fd_set * writeset)
+channel_after_select(fd_set *readset, fd_set *writeset)
{
channel_handler(channel_post, readset, writeset);
}
/* If there is data to send to the connection, enqueue some of it now. */
-
void
channel_output_poll(void)
{
/* -- protocol input */
+/* ARGSUSED */
void
channel_input_data(int type, u_int32_t seq, void *ctxt)
{
xfree(data);
}
+/* ARGSUSED */
void
channel_input_extended_data(int type, u_int32_t seq, void *ctxt)
{
xfree(data);
}
+/* ARGSUSED */
void
channel_input_ieof(int type, u_int32_t seq, void *ctxt)
{
}
+/* ARGSUSED */
void
channel_input_close(int type, u_int32_t seq, void *ctxt)
{
}
/* proto version 1.5 overloads CLOSE_CONFIRMATION with OCLOSE */
+/* ARGSUSED */
void
channel_input_oclose(int type, u_int32_t seq, void *ctxt)
{
chan_rcvd_oclose(c);
}
+/* ARGSUSED */
void
channel_input_close_confirmation(int type, u_int32_t seq, void *ctxt)
{
channel_free(c);
}
+/* ARGSUSED */
void
channel_input_open_confirmation(int type, u_int32_t seq, void *ctxt)
{
return "unknown reason";
}
+/* ARGSUSED */
void
channel_input_open_failure(int type, u_int32_t seq, void *ctxt)
{
channel_free(c);
}
+/* ARGSUSED */
void
channel_input_window_adjust(int type, u_int32_t seq, void *ctxt)
{
c->remote_window += adjust;
}
+/* ARGSUSED */
void
channel_input_port_open(int type, u_int32_t seq, void *ctxt)
{
* listening for the port, and sends back a success reply (or disconnect
* message if there was an error). This never returns if there was an error.
*/
-
void
channel_input_port_forward_request(int is_root, int gateway_ports)
{
}
-
/* return socket to remote host, port */
static int
connect_to(const char *host, u_short port)
if (ioctl(channels[i]->rfd, TIOCGWINSZ, &ws) < 0)
continue;
channel_request_start(i, "window-change", 0);
- packet_put_int(ws.ws_col);
- packet_put_int(ws.ws_row);
- packet_put_int(ws.ws_xpixel);
- packet_put_int(ws.ws_ypixel);
+ packet_put_int((u_int)ws.ws_col);
+ packet_put_int((u_int)ws.ws_row);
+ packet_put_int((u_int)ws.ws_xpixel);
+ packet_put_int((u_int)ws.ws_ypixel);
packet_send();
}
}
}
/* Allocate a channel for each socket. */
- *chanids = xmalloc(sizeof(**chanids) * (num_socks + 1));
+ *chanids = xcalloc(num_socks + 1, sizeof(**chanids));
for (n = 0; n < num_socks; n++) {
sock = socks[n];
nc = channel_new("x11 listener",
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
snprintf(addr.sun_path, sizeof addr.sun_path, _PATH_UNIX_X, dnr);
- if (connect(sock, (struct sockaddr *) & addr, sizeof(addr)) == 0)
+ if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == 0)
return sock;
close(sock);
error("connect %.100s: %.100s", addr.sun_path, strerror(errno));
int
x11_connect_display(void)
{
- int display_number, sock = 0;
+ u_int display_number;
const char *display;
char buf[1024], *cp;
struct addrinfo hints, *ai, *aitop;
char strport[NI_MAXSERV];
- int gaierr;
+ int gaierr, sock = 0;
/* Try to open a socket for the local X server. */
display = getenv("DISPLAY");
if (strncmp(display, "unix:", 5) == 0 ||
display[0] == ':') {
/* Connect to the unix domain socket. */
- if (sscanf(strrchr(display, ':') + 1, "%d", &display_number) != 1) {
+ if (sscanf(strrchr(display, ':') + 1, "%u", &display_number) != 1) {
error("Could not parse display number from DISPLAY: %.100s",
display);
return -1;
}
*cp = 0;
/* buf now contains the host name. But first we parse the display number. */
- if (sscanf(cp + 1, "%d", &display_number) != 1) {
+ if (sscanf(cp + 1, "%u", &display_number) != 1) {
error("Could not parse display number from DISPLAY: %.100s",
display);
return -1;
memset(&hints, 0, sizeof(hints));
hints.ai_family = IPv4or6;
hints.ai_socktype = SOCK_STREAM;
- snprintf(strport, sizeof strport, "%d", 6000 + display_number);
+ snprintf(strport, sizeof strport, "%u", 6000 + display_number);
if ((gaierr = getaddrinfo(buf, strport, &hints, &aitop)) != 0) {
error("%.100s: unknown host. (%s)", buf, gai_strerror(gaierr));
return -1;
}
/* Connect it to the display. */
if (connect(sock, ai->ai_addr, ai->ai_addrlen) < 0) {
- debug2("connect %.100s port %d: %.100s", buf,
+ debug2("connect %.100s port %u: %.100s", buf,
6000 + display_number, strerror(errno));
close(sock);
continue;
}
freeaddrinfo(aitop);
if (!ai) {
- error("connect %.100s port %d: %.100s", buf, 6000 + display_number,
+ error("connect %.100s port %u: %.100s", buf, 6000 + display_number,
strerror(errno));
return -1;
}
if (cp)
cp = strchr(cp, '.');
if (cp)
- screen_number = atoi(cp + 1);
+ screen_number = (u_int)strtonum(cp + 1, 0, 400, NULL);
else
screen_number = 0;
andersk / openssh.git / blobdiff