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Implement more of the services

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- SSH: ready for action
 - IRC: ready for action
 - HTTP: needs some work
This commit is contained in:
Přemysl Eric Janouch
2014-09-20 18:10:29 +02:00
parent b9571ec01f
commit 2b74a18833
5 changed files with 157 additions and 30 deletions
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23
plugins/http.c
View File

@@ -30,23 +30,38 @@ static struct plugin_data
}
g_data;
struct scan_data
{
struct str input; ///< Input buffer
};
static void *
scan_init (struct unit *u)
{
// TODO
return NULL;
struct str hello;
str_init (&hello);
str_append_printf (&hello, "GET / HTTP/1.0\r\n"
"Host: %s\r\n\r\n", g_data.api->unit_get_address (u));
g_data.api->unit_write (u, hello.str, hello.len);
str_free (&hello);
struct scan_data *scan = xcalloc (1, sizeof *scan);
str_init (&scan->input);
return scan;
}
static void
scan_free (void *handle)
{
// TODO
struct scan_data *scan = handle;
str_free (&scan->input);
free (scan);
}
static void
on_data (void *handle, struct unit *u, struct str *data)
{
// TODO
// TODO: implement a state machine to parse the headers
}
static struct service g_http_service =

101
plugins/irc.c
View File

@@ -191,6 +191,13 @@ irc_fnmatch (const char *pattern, const char *string)
return fnmatch (x_pattern, x_string, 0);
}
// --- Other selected IRC stuff ------------------------------------------------
#define IRC_MAX_NICKNAME 9 ///< The limit from RFC 2812
#define IRC_RPL_WELCOME 1
#define IRC_RPL_MYINFO 4
// --- Service detection -------------------------------------------------------
static struct plugin_data
@@ -200,11 +207,103 @@ static struct plugin_data
}
g_data;
struct scan_data
{
struct str input; ///< Input buffer
struct unit *u; ///< Scan unit
};
static void *
scan_init (struct unit *u)
{
char nick[IRC_MAX_NICKNAME + 1];
for (size_t i = 0; i < sizeof nick - 1; i++)
nick[i] = 'a' + rand () % ('z' - 'a' + 1);
struct str hello;
str_init (&hello);
str_append_printf (&hello,
"NICK %s\r\nUSER %s 8 * :%s\r\n", nick, nick, nick);
g_data.api->unit_write (u, hello.str, hello.len);
str_free (&hello);
struct scan_data *scan = xcalloc (1, sizeof *scan);
str_init (&scan->input);
scan->u = u;
return scan;
}
static void
scan_free (void *handle)
{
struct scan_data *scan = handle;
str_free (&scan->input);
free (scan);
}
static void
on_irc_message (const struct irc_message *msg, const char *raw, void *user_data)
{
(void) raw;
struct scan_data *scan = user_data;
unsigned long code;
if (!irc_strcmp (msg->command, "PING"))
{
// Without this we might be unable to finish registration
struct str pong;
str_init (&pong);
str_append_printf (&pong, "PONG :%s\r\n",
msg->params.len > 0 ? msg->params.vector[0] : "");
g_data.api->unit_write (scan->u, pong.str, pong.len);
}
else if (strlen (msg->command) == 3 && xstrtoul (&code, msg->command, 10))
{
// It looks like we've successfully registered
if (msg->prefix && code == IRC_RPL_WELCOME)
g_data.api->unit_set_success (scan->u, true);
// Extract the server name at least
if (code == IRC_RPL_MYINFO && msg->params.len > 0)
{
char *info = xstrdup_printf ("%s: %s",
"server name", msg->params.vector[0]);
g_data.api->unit_add_info (scan->u, info);
free (info);
g_data.api->unit_abort (scan->u);
}
}
}
static void
on_data (void *handle, struct unit *u, struct str *data)
{
(void) u;
struct scan_data *scan = handle;
str_append_str (&scan->input, data);
irc_process_buffer (&scan->input, on_irc_message, scan);
}
static struct service g_irc_service =
{
.name = "IRC",
.flags = SERVICE_SUPPORTS_TLS,
.scan_init = scan_init,
.scan_free = scan_free,
.on_data = on_data,
.on_eof = NULL,
.on_error = NULL,
.on_aborted = NULL
};
static bool
initialize (void *ctx, struct plugin_api *api)
{
g_data = (struct plugin_data) { .ctx = ctx, .api = api };
// TODO: register a service
api->register_service (ctx, &g_irc_service);
return true;
}

13
plugins/ssh.c
View File

@@ -56,20 +56,25 @@ scan_free (void *handle)
static void
on_data (void *handle, struct unit *u, struct str *data)
{
// TODO: don't let the input buffer grow too much
// See RFC 4253 -- we check for a valid SSH banner
struct scan_data *scan = handle;
str_append_str (&scan->input, data);
if (scan->input.len + data->len > 255)
goto end_scan;
str_append_str (&scan->input, data);
char *input = scan->input.str;
char *nl = strstr (input, "\r\n");
if (!nl)
return;
// TODO: parse the reply, make sure that it's actually SSH,
// don't put just any garbage in the output info
if (strncmp (input, "SSH-", 4))
goto end_scan;
*nl = '\0';
g_data.api->unit_add_info (u, input);
g_data.api->unit_set_success (u, true);
end_scan:
g_data.api->unit_abort (u);
}