/*
This file is part of GNUnet.
- (C) 2009, 2011 Christian Grothoff (and other contributing authors)
+ (C) 2009-2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @author Christian Grothoff
*/
#include "platform.h"
-#include "gnunet_getopt_lib.h"
-#include "gnunet_os_lib.h"
-#include "gnunet_client_lib.h"
-#include "gnunet_container_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_resolver_service.h"
-#include "gnunet_server_lib.h"
#include "resolver.h"
-#define LOG(kind,...) GNUNET_log_from (kind, "resolver-api",__VA_ARGS__)
+#define LOG(kind,...) GNUNET_log_from (kind, "resolver-api", __VA_ARGS__)
+
+#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "resolver-api", syscall)
/**
* Maximum supported length for a hostname
/**
* Desired address family.
*/
- int domain;
+ int af;
/**
* Has this request been transmitted to the service?
return;
}
i = 0;
- while (loopback[i] != NULL)
+ while (NULL != loopback[i])
if (0 == strcasecmp (loopback[i++], hostname))
{
GNUNET_free (hostname);
return;
}
LOG (GNUNET_ERROR_TYPE_ERROR,
- _
- ("Must specify `%s' or numeric IP address for `%s' of `%s' in configuration!\n"),
+ _("Must specify `%s' or numeric IP address for `%s' of `%s' in configuration!\n"),
"localhost", "HOSTNAME", "resolver");
GNUNET_free (hostname);
GNUNET_assert (0);
GNUNET_assert (NULL == req_tail);
if (NULL != client)
{
-#if DEBUG_RESOLVER
LOG (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting from DNS service\n");
-#endif
- GNUNET_CLIENT_disconnect (client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (client);
client = NULL;
}
- if (r_task != GNUNET_SCHEDULER_NO_TASK)
+ if (GNUNET_SCHEDULER_NO_TASK != r_task)
{
GNUNET_SCHEDULER_cancel (r_task);
r_task = GNUNET_SCHEDULER_NO_TASK;
}
- if (s_task != GNUNET_SCHEDULER_NO_TASK)
+ if (GNUNET_SCHEDULER_NO_TASK != s_task)
{
GNUNET_SCHEDULER_cancel (s_task);
s_task = GNUNET_SCHEDULER_NO_TASK;
/**
* Convert IP address to string without DNS resolution.
*
- * @param sa the address
- * @param salen number of bytes in sa
+ * @param af address family
+ * @param ip the address
+ * @param ip_len number of bytes in ip
* @return address as a string, NULL on error
*/
static char *
-no_resolve (const struct sockaddr *sa, socklen_t salen)
+no_resolve (int af,
+ const void *ip, socklen_t ip_len)
{
- char *ret;
- char inet4[INET_ADDRSTRLEN];
- char inet6[INET6_ADDRSTRLEN];
+ char buf[INET6_ADDRSTRLEN];
- if (salen < sizeof (struct sockaddr))
- return NULL;
- switch (sa->sa_family)
+ switch (af)
{
case AF_INET:
- if (salen != sizeof (struct sockaddr_in))
+ if (ip_len != sizeof (struct in_addr))
return NULL;
if (NULL ==
- inet_ntop (AF_INET, &((struct sockaddr_in *) sa)->sin_addr, inet4,
- INET_ADDRSTRLEN))
+ inet_ntop (AF_INET, ip, buf, sizeof (buf)))
{
- GNUNET_log_from_strerror (GNUNET_ERROR_TYPE_WARNING, "resolver-api",
- "inet_ntop");
+ LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "inet_ntop");
return NULL;
}
- ret = GNUNET_strdup (inet4);
break;
case AF_INET6:
- if (salen != sizeof (struct sockaddr_in6))
+ if (ip_len != sizeof (struct in6_addr))
return NULL;
if (NULL ==
- inet_ntop (AF_INET6, &((struct sockaddr_in6 *) sa)->sin6_addr, inet6,
- INET6_ADDRSTRLEN))
+ inet_ntop (AF_INET6, ip, buf, sizeof (buf)))
{
- GNUNET_log_from_strerror (GNUNET_ERROR_TYPE_WARNING, "resolver-api",
- "inet_ntop");
+ LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "inet_ntop");
return NULL;
}
- ret = GNUNET_strdup (inet6);
break;
default:
- ret = NULL;
- break;
+ GNUNET_break (0);
+ return NULL;
}
- return ret;
+ return GNUNET_strdup (buf);
}
{
struct GNUNET_RESOLVER_RequestHandle *rh = cls;
uint16_t size;
- const char *hostname;
- const struct sockaddr *sa;
- socklen_t salen;
-#if DEBUG_RESOLVER
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Receiving response from DNS service\n");
-#endif
- if (msg == NULL)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Receiving response from DNS service\n");
+ if (NULL == msg)
{
+ char buf[INET6_ADDRSTRLEN];
+
if (NULL != rh->name_callback)
LOG (GNUNET_ERROR_TYPE_INFO,
_("Timeout trying to resolve IP address `%s'.\n"),
- GNUNET_a2s ((const void *) &rh[1], rh->data_len));
+ inet_ntop (rh->af, (const void *) &rh[1], buf, sizeof(buf)));
else
LOG (GNUNET_ERROR_TYPE_INFO,
_("Timeout trying to resolve hostname `%s'.\n"),
(const char *) &rh[1]);
/* check if request was canceled */
- if (rh->was_transmitted != GNUNET_SYSERR)
+ if (GNUNET_SYSERR != rh->was_transmitted)
{
if (NULL != rh->name_callback)
{
/* no reverse lookup was successful, return ip as string */
if (rh->received_response == GNUNET_NO)
- rh->name_callback (rh->cls,
- no_resolve ((const struct sockaddr *) &rh[1],
- rh->data_len));
+ {
+ rh->name_callback (rh->cls, no_resolve (rh->af, &rh[1], rh->data_len));
+ rh->name_callback (rh->cls, NULL);
+ }
/* at least one reverse lookup was successful */
else
rh->name_callback (rh->cls, NULL);
}
GNUNET_CONTAINER_DLL_remove (req_head, req_tail, rh);
GNUNET_free (rh);
- GNUNET_CLIENT_disconnect (client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (client);
client = NULL;
reconnect ();
return;
if (GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE != ntohs (msg->type))
{
GNUNET_break (0);
- GNUNET_CLIENT_disconnect (client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (client);
client = NULL;
reconnect ();
return;
/* return reverse lookup results to caller */
if (NULL != rh->name_callback)
{
+ const char *hostname;
+
hostname = (const char *) &msg[1];
if (hostname[size - sizeof (struct GNUNET_MessageHeader) - 1] != '\0')
{
rh->name_callback (rh->cls, NULL);
GNUNET_CONTAINER_DLL_remove (req_head, req_tail, rh);
GNUNET_free (rh);
- GNUNET_CLIENT_disconnect (client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (client);
client = NULL;
reconnect ();
return;
}
-#if DEBUG_RESOLVER
- LOG (GNUNET_ERROR_TYPE_DEBUG, _("Resolver returns `%s' for IP `%s'.\n"),
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Resolver returns `%s' for IP `%s'.\n",
hostname, GNUNET_a2s ((const void *) &rh[1], rh->data_len));
-#endif
if (rh->was_transmitted != GNUNET_SYSERR)
rh->name_callback (rh->cls, hostname);
rh->received_response = GNUNET_YES;
/* return lookup results to caller */
if (NULL != rh->addr_callback)
{
- sa = (const struct sockaddr *) &msg[1];
- salen = size - sizeof (struct GNUNET_MessageHeader);
- if (salen < sizeof (struct sockaddr))
+ struct sockaddr_in v4;
+ struct sockaddr_in6 v6;
+ const struct sockaddr *sa;
+ socklen_t salen;
+ const void *ip;
+ size_t ip_len;
+
+ ip = &msg[1];
+ ip_len = size - sizeof (struct GNUNET_MessageHeader);
+ if (ip_len == sizeof (struct in_addr))
+ {
+ memset (&v4, 0, sizeof (v4));
+ v4.sin_family = AF_INET;
+ v4.sin_addr = *(struct in_addr*) ip;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v4.sin_len = sizeof (v4);
+#endif
+ salen = sizeof (v4);
+ sa = (const struct sockaddr *) &v4;
+ }
+ else if (ip_len == sizeof (struct in6_addr))
+ {
+ memset (&v6, 0, sizeof (v6));
+ v6.sin6_family = AF_INET6;
+ v6.sin6_addr = *(struct in6_addr*) ip;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v6.sin6_len = sizeof (v6);
+#endif
+ salen = sizeof (v6);
+ sa = (const struct sockaddr *) &v6;
+ }
+ else
{
GNUNET_break (0);
if (rh->was_transmitted != GNUNET_SYSERR)
rh->addr_callback (rh->cls, NULL, 0);
GNUNET_CONTAINER_DLL_remove (req_head, req_tail, rh);
GNUNET_free (rh);
- GNUNET_CLIENT_disconnect (client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (client);
client = NULL;
reconnect ();
return;
}
-#if DEBUG_RESOLVER
- {
- char *ips = no_resolve (sa, salen);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Resolver returns `%s' for `%s'.\n", ips,
- (const char *) &rh[1]);
- GNUNET_free (ips);
- }
-#endif
rh->addr_callback (rh->cls, sa, salen);
GNUNET_CLIENT_receive (client, &handle_response, rh,
GNUNET_TIME_absolute_get_remaining (rh->timeout));
v6.sin6_len = sizeof (v6);
#endif
hostname = (const char *) &rh[1];
- if (((rh->domain == AF_UNSPEC) || (rh->domain == AF_INET)) &&
+ if (((rh->af == AF_UNSPEC) || (rh->af == AF_INET)) &&
(1 == inet_pton (AF_INET, hostname, &v4.sin_addr)))
{
rh->addr_callback (rh->cls, (const struct sockaddr *) &v4, sizeof (v4));
- if ((rh->domain == AF_UNSPEC) &&
+ if ((rh->af == AF_UNSPEC) &&
(1 == inet_pton (AF_INET6, hostname, &v6.sin6_addr)))
{
/* this can happen on some systems IF "hostname" is "localhost" */
GNUNET_free (rh);
return;
}
- if (((rh->domain == AF_UNSPEC) || (rh->domain == AF_INET6)) &&
+ if (((rh->af == AF_UNSPEC) || (rh->af == AF_INET6)) &&
(1 == inet_pton (AF_INET6, hostname, &v6.sin6_addr)))
{
rh->addr_callback (rh->cls, (const struct sockaddr *) &v6, sizeof (v6));
v6.sin6_len = sizeof (v6);
#endif
v6.sin6_addr = in6addr_loopback;
- switch (rh->domain)
+ switch (rh->af)
{
case AF_INET:
rh->addr_callback (rh->cls, (const struct sockaddr *) &v4, sizeof (v4));
* Task executed on system shutdown.
*/
static void
-shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+shutdown_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
s_task = GNUNET_SCHEDULER_NO_TASK;
GNUNET_RESOLVER_disconnect ();
+ backoff = GNUNET_TIME_UNIT_MILLISECONDS;
}
process_requests ()
{
struct GNUNET_RESOLVER_GetMessage *msg;
- char buf[GNUNET_SERVER_MAX_MESSAGE_SIZE - 1];
+ char buf[GNUNET_SERVER_MAX_MESSAGE_SIZE - 1] GNUNET_ALIGN;
struct GNUNET_RESOLVER_RequestHandle *rh;
if (NULL == client)
htons (sizeof (struct GNUNET_RESOLVER_GetMessage) + rh->data_len);
msg->header.type = htons (GNUNET_MESSAGE_TYPE_RESOLVER_REQUEST);
msg->direction = htonl (rh->direction);
- msg->domain = htonl (rh->domain);
+ msg->af = htonl (rh->af);
memcpy (&msg[1], &rh[1], rh->data_len);
-#if DEBUG_RESOLVER
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting DNS resolution request to DNS service\n");
-#endif
if (GNUNET_OK !=
GNUNET_CLIENT_transmit_and_get_response (client, &msg->header,
GNUNET_TIME_absolute_get_remaining
(rh->timeout), GNUNET_YES,
&handle_response, rh))
{
- GNUNET_CLIENT_disconnect (client, GNUNET_NO);
+ GNUNET_CLIENT_disconnect (client);
client = NULL;
+ GNUNET_break (0);
reconnect ();
return;
}
return; /* no work pending */
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
-#if DEBUG_RESOLVER
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Trying to connect to DNS service\n");
-#endif
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Trying to connect to DNS service\n");
client = GNUNET_CLIENT_connect ("resolver", resolver_cfg);
if (NULL == client)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to connect, will try again later\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to connect, will try again later\n");
reconnect ();
return;
}
break;
}
}
-#if DEBUG_RESOLVER
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Will try to connect to DNS service in %llu ms\n",
- (unsigned long long) backoff.rel_value);
-#endif
+ "Will try to connect to DNS service in %s\n",
+ GNUNET_STRINGS_relative_time_to_string (backoff, GNUNET_YES));
GNUNET_assert (NULL != resolver_cfg);
r_task = GNUNET_SCHEDULER_add_delayed (backoff, &reconnect_task, NULL);
- backoff = GNUNET_TIME_relative_multiply (backoff, 2);
+ backoff = GNUNET_TIME_STD_BACKOFF (backoff);
}
* Convert a string to one or more IP addresses.
*
* @param hostname the hostname to resolve
- * @param domain AF_INET or AF_INET6; use AF_UNSPEC for "any"
+ * @param af AF_INET or AF_INET6; use AF_UNSPEC for "any"
* @param callback function to call with addresses
* @param callback_cls closure for callback
* @param timeout how long to try resolving
* @return handle that can be used to cancel the request, NULL on error
*/
struct GNUNET_RESOLVER_RequestHandle *
-GNUNET_RESOLVER_ip_get (const char *hostname, int domain,
+GNUNET_RESOLVER_ip_get (const char *hostname, int af,
struct GNUNET_TIME_Relative timeout,
GNUNET_RESOLVER_AddressCallback callback,
void *callback_cls)
return NULL;
}
rh = GNUNET_malloc (sizeof (struct GNUNET_RESOLVER_RequestHandle) + slen);
- rh->domain = domain;
+ rh->af = af;
rh->addr_callback = callback;
rh->cls = callback_cls;
memcpy (&rh[1], hostname, slen);
rh->direction = GNUNET_NO;
/* first, check if this is a numeric address */
if (((1 == inet_pton (AF_INET, hostname, &v4)) &&
- ((domain == AF_INET) || (domain == AF_UNSPEC))) ||
+ ((af == AF_INET) || (af == AF_UNSPEC))) ||
((1 == inet_pton (AF_INET6, hostname, &v6)) &&
- ((domain == AF_INET6) || (domain == AF_UNSPEC))))
+ ((af == AF_INET6) || (af == AF_UNSPEC))))
{
rh->task = GNUNET_SCHEDULER_add_now (&numeric_resolution, rh);
return rh;
}
/* then, check if this is a loopback address */
i = 0;
- while (loopback[i] != NULL)
+ while (NULL != loopback[i])
if (0 == strcasecmp (loopback[i++], hostname))
{
rh->task = GNUNET_SCHEDULER_add_now (&loopback_resolution, rh);
struct GNUNET_RESOLVER_RequestHandle *rh = cls;
char *result;
- result = no_resolve ((const struct sockaddr *) &rh[1], rh->data_len);
-#if DEBUG_RESOLVER
- LOG (GNUNET_ERROR_TYPE_DEBUG, _("Resolver returns `%s'.\n"), result);
-#endif
+ result = no_resolve (rh->af, &rh[1], rh->data_len);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Resolver returns `%s'.\n", result);
if (result != NULL)
{
rh->name_callback (rh->cls, result);
void *cls)
{
struct GNUNET_RESOLVER_RequestHandle *rh;
+ size_t ip_len;
+ const void *ip;
check_config ();
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ ip_len = sizeof (struct in_addr);
+ ip = &((const struct sockaddr_in*)sa)->sin_addr;
+ break;
+ case AF_INET6:
+ ip_len = sizeof (struct in6_addr);
+ ip = &((const struct sockaddr_in6*)sa)->sin6_addr;
+ break;
+ default:
+ GNUNET_break (0);
+ return NULL;
+ }
rh = GNUNET_malloc (sizeof (struct GNUNET_RESOLVER_RequestHandle) + salen);
rh->name_callback = callback;
rh->cls = cls;
+ rh->af = sa->sa_family;
rh->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- memcpy (&rh[1], sa, salen);
- rh->data_len = salen;
+ memcpy (&rh[1], ip, ip_len);
+ rh->data_len = ip_len;
rh->direction = GNUNET_YES;
rh->received_response = GNUNET_NO;
if (GNUNET_NO == do_resolve)
rh->task = GNUNET_SCHEDULER_add_now (&numeric_reverse, rh);
return rh;
}
- if (salen + sizeof (struct GNUNET_RESOLVER_GetMessage) >=
- GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- GNUNET_free (rh);
- return NULL;
- }
GNUNET_CONTAINER_DLL_insert_tail (req_head, req_tail, rh);
rh->was_queued = GNUNET_YES;
if (s_task != GNUNET_SCHEDULER_NO_TASK)
/**
- * Get local fully qualified domain name
+ * Get local fully qualified af name
*
* @return fqdn
*/
if (0 != gethostname (hostname, sizeof (hostname) - 1))
{
- GNUNET_log_from_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "resolver-api", "gethostname");
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "gethostname");
return NULL;
}
-#if DEBUG_RESOLVER
- LOG (GNUNET_ERROR_TYPE_DEBUG, _("Resolving our FQDN `%s'\n"), hostname);
-#endif
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Resolving our FQDN `%s'\n", hostname);
host = gethostbyname (hostname);
if (NULL == host)
{
/**
* Looking our own hostname.
*
- * @param domain AF_INET or AF_INET6; use AF_UNSPEC for "any"
+ * @param af AF_INET or AF_INET6; use AF_UNSPEC for "any"
* @param callback function to call with addresses
* @param cls closure for callback
* @param timeout how long to try resolving
* @return handle that can be used to cancel the request, NULL on error
*/
struct GNUNET_RESOLVER_RequestHandle *
-GNUNET_RESOLVER_hostname_resolve (int domain,
+GNUNET_RESOLVER_hostname_resolve (int af,
struct GNUNET_TIME_Relative timeout,
GNUNET_RESOLVER_AddressCallback callback,
void *cls)
if (0 != gethostname (hostname, sizeof (hostname) - 1))
{
- GNUNET_log_from_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "resolver-api", "gethostname");
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "gethostname");
return NULL;
}
-#if DEBUG_RESOLVER
- LOG (GNUNET_ERROR_TYPE_DEBUG, _("Resolving our hostname `%s'\n"), hostname);
-#endif
- return GNUNET_RESOLVER_ip_get (hostname, domain, timeout, callback, cls);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Resolving our hostname `%s'\n",
+ hostname);
+ return GNUNET_RESOLVER_ip_get (hostname, af, timeout, callback, cls);
}
projects / oweals / gnunet.git / blobdiff