static void
follow_arg_filter(const char **opt_argp, follow_info_t *follow_info)
{
int len;
unsigned int ii;
char addr[ADDR_LEN];
cli_follow_info_t* cli_follow_info = (cli_follow_info_t*)follow_info->gui_data;
if (sscanf(*opt_argp, ",%u%n", &cli_follow_info->stream_index, &len) == 1 &&
((*opt_argp)[len] == 0 || (*opt_argp)[len] == ','))
{
*opt_argp += len;
}
else
{
for (ii = 0; ii < sizeof cli_follow_info->addr/sizeof *cli_follow_info->addr; ii++)
{
if ((sscanf(*opt_argp, ADDRv6_FMT, addr, &cli_follow_info->port[ii], &len) != 2 &&
sscanf(*opt_argp, ADDRv4_FMT, addr, &cli_follow_info->port[ii], &len) != 2) ||
cli_follow_info->port[ii] <= 0 || cli_follow_info->port[ii] > G_MAXUINT16)
{
follow_exit("Invalid address:port pair.");
}
if (strcmp("ip6", host_ip_af(addr)) == 0)
{
if (!get_host_ipaddr6(addr, (struct e_in6_addr *)cli_follow_info->addrBuf[ii]))
{
follow_exit("Can't get IPv6 address");
}
set_address(&cli_follow_info->addr[ii], AT_IPv6, 16, cli_follow_info->addrBuf[ii]);
}
else
{
if (!get_host_ipaddr(addr, (guint32 *)cli_follow_info->addrBuf[ii]))
{
follow_exit("Can't get IPv4 address");
}
set_address(&cli_follow_info->addr[ii], AT_IPv4, 4, cli_follow_info->addrBuf[ii]);
}
*opt_argp += len;
}
if (cli_follow_info->addr[0].type != cli_follow_info->addr[1].type)
{
follow_exit("Mismatched IP address types.");
}
cli_follow_info->stream_index = -1;
}
}
const gchar *get_conn_cfilter(void) {
static GString *filter_str = NULL;
gchar *env, **tokens;
char *lastp, *lastc, *p;
char *pprotocol = NULL;
char *phostname = NULL;
size_t hostlen;
char *remip, *locip;
if (filter_str == NULL) {
filter_str = g_string_new("");
}
if ((env = getenv("SSH_CONNECTION")) != NULL) {
tokens = g_strsplit(env, " ", 4);
if (tokens[3]) {
remip = sanitize_filter_ip(tokens[0]);
locip = sanitize_filter_ip(tokens[2]);
g_string_printf(filter_str, "not (tcp port %s and %s host %s "
"and tcp port %s and %s host %s)", tokens[1], host_ip_af(remip), remip,
tokens[3], host_ip_af(locip), locip);
g_free(remip);
g_free(locip);
return filter_str->str;
}
} else if ((env = getenv("SSH_CLIENT")) != NULL) {
tokens = g_strsplit(env, " ", 3);
remip = sanitize_filter_ip(tokens[2]);
g_string_printf(filter_str, "not (tcp port %s and %s host %s "
"and tcp port %s)", tokens[1], host_ip_af(remip), tokens[0], remip);
g_free(remip);
return filter_str->str;
} else if ((env = getenv("REMOTEHOST")) != NULL) {
/* FreeBSD 7.0 sets REMOTEHOST to an empty string */
if (g_ascii_strcasecmp(env, "localhost") == 0 ||
strcmp(env, "127.0.0.1") == 0 ||
strcmp(env, "") == 0) {
return "";
}
remip = sanitize_filter_ip(env);
g_string_printf(filter_str, "not %s host %s", host_ip_af(remip), remip);
g_free(remip);
return filter_str->str;
} else if ((env = getenv("DISPLAY")) != NULL) {
/*
* This mirrors what _X11TransConnectDisplay() does.
* Note that, on some systems, the hostname can
* begin with "/", which means that it's a pathname
* of a UNIX domain socket to connect to.
*
* The comments mirror those in _X11TransConnectDisplay(),
* too. :-)
*
* Display names may be of the following format:
*
* [protoco./] [hostname] : [:] displaynumber [.screennumber]
*
* A string with exactly two colons separating hostname
* from the display indicates a DECnet style name. Colons
* in the hostname may occur if an IPv6 numeric address
* is used as the hostname. An IPv6 numeric address may
* also end in a double colon, so three colons in a row
* indicates an IPv6 address ending in :: followed by
* :display. To make it easier for people to read, an
* IPv6 numeric address hostname may be surrounded by []
* in a similar fashion to the IPv6 numeric address URL
* syntax defined by IETF RFC 2732.
*
* If no hostname and no protocol is specified, the string
* is interpreted as the most efficient local connection
* to a server on the same machine. This is usually:
*
* o shared memory
* o local stream
* o UNIX domain socket
* o TCP to local host.
*/
p = env;
/*
* Step 0, find the protocol. This is delimited by
* the optional slash ('/').
*/
for (lastp = p; *p != '\0' && *p != ':' && *p != '/'; p++)
;
if (*p == '\0')
return ""; /* must have a colon */
if (p != lastp && *p != ':') { /* protocol given? */
/* Yes */
pprotocol = p;
/* Is it TCP? */
if (p - lastp != 3 || g_ascii_strncasecmp(lastp, "tcp", 3) != 0)
return ""; /* not TCP */
p++; /* skip the '/' */
} else
p = env; /* reset the pointer in
case no protocol was given */
/*
* Step 1, find the hostname. This is delimited either by
* one colon, or two colons in the case of DECnet (DECnet
* Phase V allows a single colon in the hostname). (See
* note above regarding IPv6 numeric addresses with
* triple colons or [] brackets.)
*/
lastp = p;
lastc = NULL;
for (; *p != '\0'; p++)
if (*p == ':')
lastc = p;
if (lastc == NULL)
return ""; /* must have a colon */
if ((lastp != lastc) && (*(lastc - 1) == ':')
&& (((lastc - 1) == lastp) || (*(lastc - 2) != ':'))) {
/* DECnet display specified */
return "";
} else
hostlen = lastc - lastp;
if (hostlen == 0)
return ""; /* no hostname supplied */
phostname = (char *)g_malloc(hostlen + 1);
memcpy(phostname, lastp, hostlen);
phostname[hostlen] = '\0';
if (pprotocol == NULL) {
/*
* No protocol was explicitly specified, so it
* could be a local connection over a transport
* that we won't see.
*
* Does the host name refer to the local host?
* If so, the connection would probably be a
* local connection.
*
* XXX - compare against our host name?
* _X11TransConnectDisplay() does.
*/
if (g_ascii_strcasecmp(phostname, "localhost") == 0 ||
strcmp(phostname, "127.0.0.1") == 0) {
g_free(phostname);
return "";
}
/*
* A host name of "unix" (case-sensitive) also
* causes a local connection.
*/
if (strcmp(phostname, "unix") == 0) {
g_free(phostname);
return "";
}
/*
* Does the host name begin with "/"? If so,
* it's presumed to be the pathname of a
* UNIX domain socket.
*/
if (phostname[0] == '/') {
g_free(phostname);
return "";
}
}
g_string_printf(filter_str, "not %s host %s",
host_ip_af(phostname), phostname);
g_free(phostname);
return filter_str->str;
#ifdef _WIN32
} else if (GetSystemMetrics(SM_REMOTESESSION)) {
/* We have a remote session: http://msdn.microsoft.com/en-us/library/aa380798%28VS.85%29.aspx */
g_string_printf(filter_str, "not tcp port 3389");
return filter_str->str;
#endif /* _WIN32 */
}
return "";
}
