* @brief code to do DNS resolution
* @author Christian Grothoff
*/
-
-#include <stdlib.h>
#include "platform.h"
#include "gnunet_disk_lib.h"
#include "gnunet_getopt_lib.h"
{
char hostname[256];
- if (0 == getnameinfo (cache->sa,
- cache->salen,
- hostname, sizeof (hostname), NULL, 0, 0))
+ if (0 ==
+ getnameinfo (cache->sa, cache->salen, hostname, sizeof (hostname), NULL,
+ 0, 0))
cache->addr = GNUNET_strdup (hostname);
}
#endif
struct hostent *ent;
switch (cache->sa->sa_family)
- {
- case AF_INET:
- ent = gethostbyaddr (&((struct sockaddr_in *) cache->sa)->sin_addr,
- sizeof (struct in_addr), AF_INET);
- break;
- case AF_INET6:
- ent = gethostbyaddr (&((struct sockaddr_in6 *) cache->sa)->sin6_addr,
- sizeof (struct in6_addr), AF_INET6);
- break;
- default:
- ent = NULL;
- }
+ {
+ case AF_INET:
+ ent =
+ gethostbyaddr (&((struct sockaddr_in *) cache->sa)->sin_addr,
+ sizeof (struct in_addr), AF_INET);
+ break;
+ case AF_INET6:
+ ent =
+ gethostbyaddr (&((struct sockaddr_in6 *) cache->sa)->sin6_addr,
+ sizeof (struct in6_addr), AF_INET6);
+ break;
+ default:
+ ent = NULL;
+ }
if (ent != NULL)
cache->addr = GNUNET_strdup (ent->h_name);
}
struct GNUNET_SERVER_TransmitContext *tc;
if (salen < sizeof (struct sockaddr))
- {
- GNUNET_break (0);
- return;
- }
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
now = GNUNET_TIME_absolute_get ();
cache = head;
prev = NULL;
while ((cache != NULL) &&
((cache->salen != salen) || (0 != memcmp (cache->sa, sa, salen))))
+ {
+ if (GNUNET_TIME_absolute_get_duration (cache->last_request).rel_value <
+ 60 * 60 * 1000)
{
- if (GNUNET_TIME_absolute_get_duration (cache->last_request).value <
- 60 * 60 * 1000)
- {
- if (prev != NULL)
- {
- prev->next = cache->next;
- GNUNET_free_non_null (cache->addr);
- GNUNET_free (cache->sa);
- GNUNET_free (cache);
- cache = prev->next;
- }
- else
- {
- head = cache->next;
- GNUNET_free_non_null (cache->addr);
- GNUNET_free (cache->sa);
- GNUNET_free (cache);
- cache = head;
- }
- continue;
- }
- prev = cache;
- cache = cache->next;
+ if (prev != NULL)
+ {
+ prev->next = cache->next;
+ GNUNET_free_non_null (cache->addr);
+ GNUNET_free (cache->sa);
+ GNUNET_free (cache);
+ cache = prev->next;
+ }
+ else
+ {
+ head = cache->next;
+ GNUNET_free_non_null (cache->addr);
+ GNUNET_free (cache->sa);
+ GNUNET_free (cache);
+ cache = head;
+ }
+ continue;
}
+ prev = cache;
+ cache = cache->next;
+ }
if (cache != NULL)
+ {
+ cache->last_request = now;
+ if (GNUNET_TIME_absolute_get_duration (cache->last_request).rel_value <
+ 60 * 60 * 1000)
{
- cache->last_request = now;
- if (GNUNET_TIME_absolute_get_duration (cache->last_request).value <
- 60 * 60 * 1000)
- {
- GNUNET_free_non_null (cache->addr);
- cache->addr = NULL;
- cache->salen = 0;
- cache_resolve (cache);
- }
- }
- else
- {
- cache = GNUNET_malloc (sizeof (struct IPCache));
- cache->next = head;
- cache->salen = salen;
- cache->sa = GNUNET_malloc (salen);
- memcpy (cache->sa, sa, salen);
- cache->last_request = GNUNET_TIME_absolute_get ();
- cache->last_refresh = GNUNET_TIME_absolute_get ();
+ GNUNET_free_non_null (cache->addr);
cache->addr = NULL;
+ cache->salen = 0;
cache_resolve (cache);
- head = cache;
}
+ }
+ else
+ {
+ cache = GNUNET_malloc (sizeof (struct IPCache));
+ cache->next = head;
+ cache->salen = salen;
+ cache->sa = GNUNET_malloc (salen);
+ memcpy (cache->sa, sa, salen);
+ cache->last_request = GNUNET_TIME_absolute_get ();
+ cache->last_refresh = GNUNET_TIME_absolute_get ();
+ cache->addr = NULL;
+ cache_resolve (cache);
+ head = cache;
+ }
tc = GNUNET_SERVER_transmit_context_create (client);
if (cache->addr != NULL)
- GNUNET_SERVER_transmit_context_append (tc,
- cache->addr,
- strlen (cache->addr) + 1,
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
- GNUNET_SERVER_transmit_context_append (tc, NULL, 0,
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ GNUNET_SERVER_transmit_context_append_data (tc, cache->addr,
+ strlen (cache->addr) + 1,
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
}
hints.ai_socktype = SOCK_STREAM; /* go for TCP */
if (0 != (s = getaddrinfo (hostname, NULL, &hints, &result)))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Could not resolve `%s' (%s): %s\n"), hostname,
- (domain ==
- AF_INET) ? "IPv4" : ((domain ==
- AF_INET6) ? "IPv6" : "any"),
- gai_strerror (s));
- if ((s == EAI_BADFLAGS) || (s == EAI_MEMORY) ||
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Could not resolve `%s' (%s): %s\n"),
+ hostname,
+ (domain ==
+ AF_INET) ? "IPv4" : ((domain == AF_INET6) ? "IPv6" : "any"),
+ gai_strerror (s));
+ if ((s == EAI_BADFLAGS) || (s == EAI_MEMORY)
#ifndef MINGW
- (s == EAI_SYSTEM)
+ || (s == EAI_SYSTEM)
#else
- // FIXME NILS
- 1
+ // FIXME NILS
+ || 1
#endif
)
- return GNUNET_NO; /* other function may still succeed */
- return GNUNET_SYSERR;
- }
+ return GNUNET_NO; /* other function may still succeed */
+ return GNUNET_SYSERR;
+ }
if (result == NULL)
return GNUNET_SYSERR;
pos = result;
while (pos != NULL)
- {
- GNUNET_SERVER_transmit_context_append (tc,
- result->ai_addr,
- result->ai_addrlen,
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
- pos = pos->ai_next;
- }
+ {
+ GNUNET_SERVER_transmit_context_append_data (tc, pos->ai_addr,
+ pos->ai_addrlen,
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ pos = pos->ai_next;
+ }
freeaddrinfo (result);
return GNUNET_OK;
}
int ret2;
if (domain == AF_UNSPEC)
- {
- ret1 = gethostbyname2_resolve (tc, hostname, AF_INET);
- ret2 = gethostbyname2_resolve (tc, hostname, AF_INET6);
- if ((ret1 == GNUNET_OK) || (ret2 == GNUNET_OK))
- return GNUNET_OK;
- if ((ret1 == GNUNET_SYSERR) || (ret2 == GNUNET_SYSERR))
- return GNUNET_SYSERR;
- return GNUNET_NO;
- }
+ {
+ ret1 = gethostbyname2_resolve (tc, hostname, AF_INET);
+ ret2 = gethostbyname2_resolve (tc, hostname, AF_INET6);
+ if ((ret1 == GNUNET_OK) || (ret2 == GNUNET_OK))
+ return GNUNET_OK;
+ if ((ret1 == GNUNET_SYSERR) || (ret2 == GNUNET_SYSERR))
+ return GNUNET_SYSERR;
+ return GNUNET_NO;
+ }
hp = gethostbyname2 (hostname, domain);
if (hp == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Could not find IP of host `%s': %s\n"),
- hostname, hstrerror (h_errno));
- return GNUNET_SYSERR;
- }
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Could not find IP of host `%s': %s\n"), hostname,
+ hstrerror (h_errno));
+ return GNUNET_SYSERR;
+ }
GNUNET_assert (hp->h_addrtype == domain);
if (domain == AF_INET)
- {
- GNUNET_assert (hp->h_length == sizeof (struct in_addr));
- memset (&a4, 0, sizeof (a4));
- a4.sin_family = AF_INET;
- memcpy (&a4.sin_addr, hp->h_addr_list[0], hp->h_length);
- GNUNET_SERVER_transmit_context_append (tc,
- &a4,
- sizeof (a4),
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
- }
+ {
+ GNUNET_assert (hp->h_length == sizeof (struct in_addr));
+ memset (&a4, 0, sizeof (a4));
+ a4.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ a4.sin_len = (u_char) sizeof (struct sockaddr_in);
+#endif
+ memcpy (&a4.sin_addr, hp->h_addr_list[0], hp->h_length);
+ GNUNET_SERVER_transmit_context_append_data (tc, &a4, sizeof (a4),
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ }
else
- {
- GNUNET_assert (hp->h_length == sizeof (struct in6_addr));
- memset (&a6, 0, sizeof (a6));
- a6.sin6_family = AF_INET6;
- memcpy (&a6.sin6_addr, hp->h_addr_list[0], hp->h_length);
- GNUNET_SERVER_transmit_context_append (tc,
- &a6,
- sizeof (a6),
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
- }
+ {
+ GNUNET_assert (hp->h_length == sizeof (struct in6_addr));
+ memset (&a6, 0, sizeof (a6));
+ a6.sin6_family = AF_INET6;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ a6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
+#endif
+ memcpy (&a6.sin6_addr, hp->h_addr_list[0], hp->h_length);
+ GNUNET_SERVER_transmit_context_append_data (tc, &a6, sizeof (a6),
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ }
return GNUNET_OK;
}
#endif
hp = GETHOSTBYNAME (hostname);
if (hp == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Could not find IP of host `%s': %s\n"),
- hostname, hstrerror (h_errno));
- return GNUNET_SYSERR;
- }
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Could not find IP of host `%s': %s\n"), hostname,
+ hstrerror (h_errno));
+ return GNUNET_SYSERR;
+ }
if (hp->h_addrtype != AF_INET)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
GNUNET_assert (hp->h_length == sizeof (struct in_addr));
memset (&addr, 0, sizeof (addr));
addr.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ addr.sin_len = (u_char) sizeof (struct sockaddr_in);
+#endif
memcpy (&addr.sin_addr, hp->h_addr_list[0], hp->h_length);
- GNUNET_SERVER_transmit_context_append (tc,
- &addr,
- sizeof (addr),
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ GNUNET_SERVER_transmit_context_append_data (tc, &addr, sizeof (addr),
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
return GNUNET_OK;
}
#endif
* @param domain AF_INET or AF_INET6; use AF_UNSPEC for "any"
*/
static void
-get_ip_from_hostname (struct GNUNET_SERVER_Client *client,
- const char *hostname, int domain)
+get_ip_from_hostname (struct GNUNET_SERVER_Client *client, const char *hostname,
+ int domain)
{
int ret;
struct GNUNET_SERVER_TransmitContext *tc;
if ((ret == GNUNET_NO) && ((domain == AF_UNSPEC) || (domain == PF_INET)))
gethostbyname_resolve (tc, hostname);
#endif
- GNUNET_SERVER_transmit_context_append (tc, NULL, 0,
- GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
+ GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
+ GNUNET_MESSAGE_TYPE_RESOLVER_RESPONSE);
GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
}
* @param message the actual message
*/
static void
-handle_get (void *cls,
- struct GNUNET_SERVER_Client *client,
+handle_get (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
uint16_t msize;
const struct GNUNET_RESOLVER_GetMessage *msg;
const char *hostname;
+ const struct sockaddr *sa;
uint16_t size;
int direction;
int domain;
msize = ntohs (message->size);
if (msize < sizeof (struct GNUNET_RESOLVER_GetMessage))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
msg = (const struct GNUNET_RESOLVER_GetMessage *) message;
size = msize - sizeof (struct GNUNET_RESOLVER_GetMessage);
direction = ntohl (msg->direction);
domain = ntohl (msg->domain);
if (direction == GNUNET_NO)
+ {
+ /* IP from hostname */
+ hostname = (const char *) &msg[1];
+ if (hostname[size - 1] != '\0')
{
- /* IP from hostname */
- hostname = (const char *) &msg[1];
- if (hostname[size - 1] != '\0')
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
#if DEBUG_RESOLVER
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Resolver asked to look up `%s'.\n"), hostname);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Resolver asked to look up `%s'.\n"),
+ hostname);
#endif
- get_ip_from_hostname (client, hostname, domain);
- }
+ get_ip_from_hostname (client, hostname, domain);
+ }
else
+ {
+#if DEBUG_RESOLVER
+ char buf[INET6_ADDRSTRLEN];
+#endif
+ if (size < sizeof (struct sockaddr))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ sa = (const struct sockaddr *) &msg[1];
+ switch (sa->sa_family)
{
+ case AF_INET:
+ if (size != sizeof (struct sockaddr_in))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+#if DEBUG_RESOLVER
+ inet_ntop (AF_INET, sa, buf, size);
+#endif
+ break;
+ case AF_INET6:
+ if (size != sizeof (struct sockaddr_in6))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
#if DEBUG_RESOLVER
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Resolver asked to look up IP address.\n"));
+ inet_ntop (AF_INET6, sa, buf, size);
#endif
- get_ip_as_string (client, (const struct sockaddr *) &msg[1], size);
+ break;
+ default:
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
}
+#if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ _("Resolver asked to look up IP address `%s'.\n"), buf);
+#endif
+ get_ip_as_string (client, sa, size);
+ }
}
-/**
- * List of handlers for the messages understood by this
- * service.
- */
-static struct GNUNET_SERVER_MessageHandler handlers[] = {
- {&handle_get, NULL, GNUNET_MESSAGE_TYPE_RESOLVER_REQUEST, 0},
- {NULL, NULL, 0, 0}
-};
-
-
/**
* Process resolver requests.
*
* @param cls closure
- * @param sched scheduler to use
* @param server the initialized server
* @param cfg configuration to use
*/
static void
-run (void *cls,
- struct GNUNET_SCHEDULER_Handle *sched,
- struct GNUNET_SERVER_Handle *server,
+run (void *cls, struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
+ static const struct GNUNET_SERVER_MessageHandler handlers[] = {
+ {&handle_get, NULL, GNUNET_MESSAGE_TYPE_RESOLVER_REQUEST, 0},
+ {NULL, NULL, 0, 0}
+ };
GNUNET_SERVER_add_handlers (server, handlers);
}
int ret;
struct IPCache *pos;
- ret = (GNUNET_OK ==
- GNUNET_SERVICE_run (argc,
- argv,
- "resolver", &run, NULL)) ? 0 : 1;
+ ret =
+ (GNUNET_OK ==
+ GNUNET_SERVICE_run (argc, argv, "resolver", GNUNET_SERVICE_OPTION_NONE,
+ &run, NULL)) ? 0 : 1;
while (head != NULL)
- {
- pos = head->next;
- GNUNET_free_non_null (head->addr);
- GNUNET_free (head->sa);
- GNUNET_free (head);
- head = pos;
- }
+ {
+ pos = head->next;
+ GNUNET_free_non_null (head->addr);
+ GNUNET_free (head->sa);
+ GNUNET_free (head);
+ head = pos;
+ }
return ret;
}
projects / oweals / gnunet.git / blobdiff