#include "gnunet_nat_lib.h"
#include "nat.h"
-#define DEBUG_NAT GNUNET_NO
+#define LOG(kind,...) GNUNET_log_from (kind, "nat", __VA_ARGS__)
/**
* How long do we give upnpc to create a mapping?
* @param tc scheduler context
*/
static void
-read_external_ipv4 (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+read_external_ipv4 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_NAT_ExternalHandle *eh = cls;
ssize_t ret;
int iret;
eh->task = GNUNET_SCHEDULER_NO_TASK;
- if (GNUNET_YES ==
- GNUNET_NETWORK_fdset_handle_isset (tc->read_ready,
- eh->r))
- ret = GNUNET_DISK_file_read (eh->r,
- &eh->buf[eh->off],
- sizeof (eh->buf)-eh->off);
+ if (GNUNET_YES == GNUNET_NETWORK_fdset_handle_isset (tc->read_ready, eh->r))
+ ret =
+ GNUNET_DISK_file_read (eh->r, &eh->buf[eh->off],
+ sizeof (eh->buf) - eh->off);
else
- ret = -1; /* error reading, timeout, etc. */
+ ret = -1; /* error reading, timeout, etc. */
if (ret > 0)
- {
- /* try to read more */
- eh->off += ret;
- eh->task = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_absolute_get_remaining (eh->timeout),
- eh->r,
- &read_external_ipv4,
- eh);
- return;
- }
+ {
+ /* try to read more */
+ eh->off += ret;
+ eh->task =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_absolute_get_remaining
+ (eh->timeout), eh->r,
+ &read_external_ipv4, eh);
+ return;
+ }
iret = GNUNET_NO;
- if ( (eh->off > 7) &&
- (eh->buf[eh->off-1] == '\n') )
+ if ((eh->off > 7) && (eh->buf[eh->off - 1] == '\n'))
+ {
+ eh->buf[eh->off - 1] = '\0';
+ if (1 == inet_pton (AF_INET, eh->buf, &addr))
{
- eh->buf[eh->off-1] = '\0';
- if (1 == inet_pton (AF_INET, eh->buf, &addr))
- {
- if (addr.s_addr == 0)
- iret = GNUNET_NO; /* got 0.0.0.0 */
- else
- iret = GNUNET_OK;
- }
+ if (addr.s_addr == 0)
+ iret = GNUNET_NO; /* got 0.0.0.0 */
+ else
+ iret = GNUNET_OK;
}
- eh->cb (eh->cb_cls,
- (iret == GNUNET_OK) ? &addr : NULL);
+ }
+ eh->cb (eh->cb_cls, (iret == GNUNET_OK) ? &addr : NULL);
GNUNET_NAT_mini_get_external_ipv4_cancel (eh);
}
*/
struct GNUNET_NAT_ExternalHandle *
GNUNET_NAT_mini_get_external_ipv4 (struct GNUNET_TIME_Relative timeout,
- GNUNET_NAT_IPCallback cb,
- void *cb_cls)
+ GNUNET_NAT_IPCallback cb, void *cb_cls)
{
struct GNUNET_NAT_ExternalHandle *eh;
+ if (GNUNET_SYSERR == GNUNET_OS_check_helper_binary ("external-ip"))
+ {
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("`external-ip' command not found\n"));
+ return NULL;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Running `external-ip' to determine our external IP\n");
eh = GNUNET_malloc (sizeof (struct GNUNET_NAT_ExternalHandle));
eh->cb = cb;
eh->cb_cls = cb_cls;
- eh->opipe = GNUNET_DISK_pipe (GNUNET_YES,
- GNUNET_NO,
- GNUNET_YES);
+ eh->opipe = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO, GNUNET_YES);
if (NULL == eh->opipe)
- {
- GNUNET_free (eh);
- return NULL;
- }
- eh->eip = GNUNET_OS_start_process (NULL,
- eh->opipe,
- "external-ip",
- "external-ip", NULL);
+ {
+ GNUNET_free (eh);
+ return NULL;
+ }
+ eh->eip =
+ GNUNET_OS_start_process (GNUNET_NO, 0, NULL, eh->opipe, "external-ip", "external-ip",
+ NULL);
if (NULL == eh->eip)
- {
- GNUNET_DISK_pipe_close (eh->opipe);
- GNUNET_free (eh);
- return NULL;
- }
+ {
+ GNUNET_DISK_pipe_close (eh->opipe);
+ GNUNET_free (eh);
+ return NULL;
+ }
GNUNET_DISK_pipe_close_end (eh->opipe, GNUNET_DISK_PIPE_END_WRITE);
eh->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- eh->r = GNUNET_DISK_pipe_handle (eh->opipe,
- GNUNET_DISK_PIPE_END_READ);
- eh->task = GNUNET_SCHEDULER_add_read_file (timeout,
- eh->r,
- &read_external_ipv4,
- eh);
+ eh->r = GNUNET_DISK_pipe_handle (eh->opipe, GNUNET_DISK_PIPE_END_READ);
+ eh->task =
+ GNUNET_SCHEDULER_add_read_file (timeout, eh->r, &read_external_ipv4, eh);
return eh;
}
GNUNET_NAT_mini_get_external_ipv4_cancel (struct GNUNET_NAT_ExternalHandle *eh)
{
(void) GNUNET_OS_process_kill (eh->eip, SIGKILL);
- GNUNET_OS_process_close (eh->eip);
+ GNUNET_OS_process_destroy (eh->eip);
GNUNET_DISK_pipe_close (eh->opipe);
if (GNUNET_SCHEDULER_NO_TASK != eh->task)
GNUNET_SCHEDULER_cancel (eh->task);
/**
* Handle to a mapping created with upnpc.
- */
+ */
struct GNUNET_NAT_MiniHandle
{
/**
* Did we find our mapping during refresh scan?
- */
+ */
int found;
/**
* @param tc scheduler context
*/
static void
-do_refresh (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
+do_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
/**
* @param line line of output, NULL at the end
*/
static void
-process_map_output (void *cls,
- const char *line);
+process_map_output (void *cls, const char *line);
/**
* @param line line of output, NULL at the end
*/
static void
-process_refresh_output (void *cls,
- const char *line)
+process_refresh_output (void *cls, const char *line)
{
struct GNUNET_NAT_MiniHandle *mini = cls;
char pstr[9];
struct in_addr exip;
if (NULL == line)
+ {
+ GNUNET_OS_command_stop (mini->refresh_cmd);
+ mini->refresh_cmd = NULL;
+ if (mini->found == GNUNET_NO)
{
- GNUNET_OS_command_stop (mini->refresh_cmd);
- mini->refresh_cmd = NULL;
- if (mini->found == GNUNET_NO)
- {
- /* mapping disappeared, try to re-create */
- if (mini->did_map)
- {
- mini->ac (mini->ac_cls, GNUNET_NO,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
- mini->did_map = GNUNET_NO;
- }
- GNUNET_snprintf (pstr, sizeof (pstr),
- "%u",
- (unsigned int) mini->port);
- mini->map_cmd = GNUNET_OS_command_run (&process_map_output,
- mini,
- MAP_TIMEOUT,
- "upnpc",
- "upnpc",
- "-r", pstr,
- mini->is_tcp ? "tcp" : "udp",
- NULL);
- if (NULL != mini->map_cmd)
- return;
- }
- mini->refresh_task = GNUNET_SCHEDULER_add_delayed (MAP_REFRESH_FREQ,
- &do_refresh,
- mini);
- return;
+ /* mapping disappeared, try to re-create */
+ if (mini->did_map)
+ {
+ mini->ac (mini->ac_cls, GNUNET_NO,
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
+ mini->did_map = GNUNET_NO;
+ }
+ GNUNET_snprintf (pstr, sizeof (pstr), "%u", (unsigned int) mini->port);
+ mini->map_cmd =
+ GNUNET_OS_command_run (&process_map_output, mini, MAP_TIMEOUT,
+ "upnpc", "upnpc", "-r", pstr,
+ mini->is_tcp ? "tcp" : "udp", NULL);
+ if (NULL != mini->map_cmd)
+ return;
}
- if (! mini->did_map)
- return; /* never mapped, won't find our mapping anyway */
+ mini->refresh_task =
+ GNUNET_SCHEDULER_add_delayed (MAP_REFRESH_FREQ, &do_refresh, mini);
+ return;
+ }
+ if (!mini->did_map)
+ return; /* never mapped, won't find our mapping anyway */
/* we're looking for output of the form:
- "ExternalIPAddress = 12.134.41.124" */
+ * "ExternalIPAddress = 12.134.41.124" */
s = strstr (line, "ExternalIPAddress = ");
if (NULL != s)
- {
- s += strlen ("ExternalIPAddress = ");
- if (1 != inet_pton (AF_INET,
- s, &exip))
- return; /* skip */
- if (exip.s_addr == mini->current_addr.sin_addr.s_addr)
- return; /* no change */
- /* update mapping */
- mini->ac (mini->ac_cls, GNUNET_NO,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
- mini->current_addr.sin_addr = exip;
- mini->ac (mini->ac_cls, GNUNET_YES,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
- return;
- }
+ {
+ s += strlen ("ExternalIPAddress = ");
+ if (1 != inet_pton (AF_INET, s, &exip))
+ return; /* skip */
+ if (exip.s_addr == mini->current_addr.sin_addr.s_addr)
+ return; /* no change */
+ /* update mapping */
+ mini->ac (mini->ac_cls, GNUNET_NO,
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
+ mini->current_addr.sin_addr = exip;
+ mini->ac (mini->ac_cls, GNUNET_YES,
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
+ return;
+ }
/*
- we're looking for output of the form:
-
- "0 TCP 3000->192.168.2.150:3000 'libminiupnpc' ''"
- "1 UDP 3001->192.168.2.150:3001 'libminiupnpc' ''"
-
- the pattern we look for is:
-
- "%s TCP PORT->STRING:OURPORT *" or
- "%s UDP PORT->STRING:OURPORT *"
- */
- GNUNET_snprintf (pstr, sizeof (pstr),
- ":%u ",
- mini->port);
+ * we're looking for output of the form:
+ *
+ * "0 TCP 3000->192.168.2.150:3000 'libminiupnpc' ''"
+ * "1 UDP 3001->192.168.2.150:3001 'libminiupnpc' ''"
+ *
+ * the pattern we look for is:
+ *
+ * "%s TCP PORT->STRING:OURPORT *" or
+ * "%s UDP PORT->STRING:OURPORT *"
+ */
+ GNUNET_snprintf (pstr, sizeof (pstr), ":%u ", mini->port);
if (NULL == (s = strstr (line, "->")))
- return; /* skip */
+ return; /* skip */
if (NULL == strstr (s, pstr))
- return; /* skip */
- if (1 != sscanf (line,
- (mini->is_tcp)
- ? "%*u TCP %u->%*s:%*u %*s"
- : "%*u UDP %u->%*s:%*u %*s",
- &nport))
- return; /* skip */
+ return; /* skip */
+ if (1 !=
+ SSCANF (line,
+ (mini->is_tcp) ? "%*u TCP %u->%*s:%*u %*s" :
+ "%*u UDP %u->%*s:%*u %*s", &nport))
+ return; /* skip */
mini->found = GNUNET_YES;
if (nport == ntohs (mini->current_addr.sin_port))
- return; /* no change */
+ return; /* no change */
/* external port changed, update mapping */
mini->ac (mini->ac_cls, GNUNET_NO,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
mini->current_addr.sin_port = htons ((uint16_t) nport);
mini->ac (mini->ac_cls, GNUNET_YES,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
}
* @param tc scheduler context
*/
static void
-do_refresh (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+do_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_NAT_MiniHandle *mini = cls;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Running `upnpc' to check if our mapping still exists\n");
mini->refresh_task = GNUNET_SCHEDULER_NO_TASK;
mini->found = GNUNET_NO;
- mini->refresh_cmd = GNUNET_OS_command_run (&process_refresh_output,
- mini,
- MAP_TIMEOUT,
- "upnpc",
- "upnpc",
- "-l",
- NULL);
+ mini->refresh_cmd =
+ GNUNET_OS_command_run (&process_refresh_output, mini, MAP_TIMEOUT,
+ "upnpc", "upnpc", "-l", NULL);
}
* @param line line of output, NULL at the end
*/
static void
-process_map_output (void *cls,
- const char *line)
+process_map_output (void *cls, const char *line)
{
struct GNUNET_NAT_MiniHandle *mini = cls;
const char *ipaddr;
unsigned int port;
if (NULL == line)
- {
- GNUNET_OS_command_stop (mini->map_cmd);
- mini->map_cmd = NULL;
- mini->refresh_task = GNUNET_SCHEDULER_add_delayed (MAP_REFRESH_FREQ,
- &do_refresh,
- mini);
- return;
- }
+ {
+ GNUNET_OS_command_stop (mini->map_cmd);
+ mini->map_cmd = NULL;
+ mini->refresh_task =
+ GNUNET_SCHEDULER_add_delayed (MAP_REFRESH_FREQ, &do_refresh, mini);
+ return;
+ }
/*
- The upnpc output we're after looks like this:
-
- "external 87.123.42.204:3000 TCP is redirected to internal 192.168.2.150:3000"
- */
- if ( (NULL == (ipaddr = strstr (line, " "))) ||
- (NULL == (pstr = strstr (ipaddr, ":"))) ||
- (1 != sscanf (pstr + 1, "%u", &port)) )
- {
- return; /* skip line */
- }
+ * The upnpc output we're after looks like this:
+ *
+ * "external 87.123.42.204:3000 TCP is redirected to internal 192.168.2.150:3000"
+ */
+ if ((NULL == (ipaddr = strstr (line, " "))) ||
+ (NULL == (pstr = strstr (ipaddr, ":"))) ||
+ (1 != SSCANF (pstr + 1, "%u", &port)))
+ {
+ return; /* skip line */
+ }
ipa = GNUNET_strdup (ipaddr + 1);
strstr (ipa, ":")[0] = '\0';
- if (1 != inet_pton (AF_INET,
- ipa,
- &mini->current_addr.sin_addr))
- {
- GNUNET_free (ipa);
- return; /* skip line */
- }
- GNUNET_free (ipa);
+ if (1 != inet_pton (AF_INET, ipa, &mini->current_addr.sin_addr))
+ {
+ GNUNET_free (ipa);
+ return; /* skip line */
+ }
+ GNUNET_free (ipa);
mini->current_addr.sin_port = htons (port);
mini->current_addr.sin_family = AF_INET;
#endif
mini->did_map = GNUNET_YES;
mini->ac (mini->ac_cls, GNUNET_YES,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
}
* general-purpose 'GNUNET_NAT_register' code). However, it can be
* used if specifically UPnP-based NAT traversal is to be used or
* tested.
- *
+ *
* @param port port to map
* @param is_tcp GNUNET_YES to map TCP, GNUNET_NO for UDP
* @param ac function to call with mapping result
* @return NULL on error (no 'upnpc' installed)
*/
struct GNUNET_NAT_MiniHandle *
-GNUNET_NAT_mini_map_start (uint16_t port,
- int is_tcp,
- GNUNET_NAT_AddressCallback ac,
- void *ac_cls)
+GNUNET_NAT_mini_map_start (uint16_t port, int is_tcp,
+ GNUNET_NAT_AddressCallback ac, void *ac_cls)
{
struct GNUNET_NAT_MiniHandle *ret;
char pstr[6];
- if (GNUNET_SYSERR ==
- GNUNET_OS_check_helper_binary ("upnpc"))
+ if (GNUNET_SYSERR == GNUNET_OS_check_helper_binary ("upnpc"))
+ {
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("`upnpc' command not found\n"));
return NULL;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Running `upnpc' to install mapping\n");
ret = GNUNET_malloc (sizeof (struct GNUNET_NAT_MiniHandle));
ret->ac = ac;
ret->ac_cls = ac_cls;
ret->is_tcp = is_tcp;
ret->port = port;
- GNUNET_snprintf (pstr, sizeof (pstr),
- "%u",
- (unsigned int) port);
- ret->map_cmd = GNUNET_OS_command_run (&process_map_output,
- ret,
- MAP_TIMEOUT,
- "upnpc",
- "upnpc",
- "-r", pstr,
- is_tcp ? "tcp" : "udp",
- NULL);
+ GNUNET_snprintf (pstr, sizeof (pstr), "%u", (unsigned int) port);
+ ret->map_cmd =
+ GNUNET_OS_command_run (&process_map_output, ret, MAP_TIMEOUT, "upnpc",
+ "upnpc", "-r", pstr, is_tcp ? "tcp" : "udp", NULL);
if (NULL != ret->map_cmd)
return ret;
- ret->refresh_task = GNUNET_SCHEDULER_add_delayed (MAP_REFRESH_FREQ,
- &do_refresh,
- ret);
+ ret->refresh_task =
+ GNUNET_SCHEDULER_add_delayed (MAP_REFRESH_FREQ, &do_refresh, ret);
return ret;
}
* @param line line of output, NULL at the end
*/
static void
-process_unmap_output (void *cls,
- const char *line)
+process_unmap_output (void *cls, const char *line)
{
struct GNUNET_NAT_MiniHandle *mini = cls;
if (NULL == line)
- {
-#if DEBUG_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "nat",
- "UPnP unmap done\n");
-#endif
- GNUNET_OS_command_stop (mini->unmap_cmd);
- mini->unmap_cmd = NULL;
- GNUNET_free (mini);
- return;
- }
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "UPnP unmap done\n");
+ GNUNET_OS_command_stop (mini->unmap_cmd);
+ mini->unmap_cmd = NULL;
+ GNUNET_free (mini);
+ return;
+ }
/* we don't really care about the output... */
}
* this function will give 'upnpc' 1s to remove tha mapping,
* so while this function is non-blocking, a task will be
* left with the scheduler for up to 1s past this call.
- *
+ *
* @param mini the handle
*/
void
char pstr[6];
if (GNUNET_SCHEDULER_NO_TASK != mini->refresh_task)
- {
- GNUNET_SCHEDULER_cancel (mini->refresh_task);
- mini->refresh_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ {
+ GNUNET_SCHEDULER_cancel (mini->refresh_task);
+ mini->refresh_task = GNUNET_SCHEDULER_NO_TASK;
+ }
if (mini->refresh_cmd != NULL)
+ {
+ GNUNET_OS_command_stop (mini->refresh_cmd);
+ mini->refresh_cmd = NULL;
+ }
+ if (!mini->did_map)
+ {
+ if (mini->map_cmd != NULL)
{
- GNUNET_OS_command_stop (mini->refresh_cmd);
- mini->refresh_cmd = NULL;
- }
- if (! mini->did_map)
- {
- if (mini->map_cmd != NULL)
- {
- GNUNET_OS_command_stop (mini->map_cmd);
- mini->map_cmd = NULL;
- }
- GNUNET_free (mini);
- return;
+ GNUNET_OS_command_stop (mini->map_cmd);
+ mini->map_cmd = NULL;
}
+ GNUNET_free (mini);
+ return;
+ }
mini->ac (mini->ac_cls, GNUNET_NO,
- (const struct sockaddr*) &mini->current_addr,
- sizeof (mini->current_addr));
+ (const struct sockaddr *) &mini->current_addr,
+ sizeof (mini->current_addr));
/* Note: oddly enough, deletion uses the external port whereas
- addition uses the internal port; this rarely matters since they
- often are the same, but it might... */
- GNUNET_snprintf (pstr, sizeof (pstr),
- "%u",
- (unsigned int) ntohs (mini->current_addr.sin_port));
-#if DEBUG_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "nat",
- "Unmapping port %u with UPnP\n",
- ntohs (mini->current_addr.sin_port));
-#endif
- mini->unmap_cmd = GNUNET_OS_command_run (&process_unmap_output,
- mini,
- UNMAP_TIMEOUT,
- "upnpc",
- "upnpc",
- "-d", pstr,
- mini->is_tcp ? "tcp" : "udp",
- NULL);
+ * addition uses the internal port; this rarely matters since they
+ * often are the same, but it might... */
+ GNUNET_snprintf (pstr, sizeof (pstr), "%u",
+ (unsigned int) ntohs (mini->current_addr.sin_port));
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Unmapping port %u with UPnP\n",
+ ntohs (mini->current_addr.sin_port));
+ mini->unmap_cmd =
+ GNUNET_OS_command_run (&process_unmap_output, mini, UNMAP_TIMEOUT,
+ "upnpc", "upnpc", "-d", pstr,
+ mini->is_tcp ? "tcp" : "udp", NULL);
}
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