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-rw-r--r--src/transport/tcp_service_legacy.c1687
1 files changed, 1687 insertions, 0 deletions
diff --git a/src/transport/tcp_service_legacy.c b/src/transport/tcp_service_legacy.c
new file mode 100644
index 000000000..c55d586f3
--- /dev/null
+++ b/src/transport/tcp_service_legacy.c
@@ -0,0 +1,1687 @@
+/*
+ This file is part of GNUnet.
+ Copyright (C) 2009, 2012 GNUnet e.V.
+
+ 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 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+/**
+ * @file util/service.c
+ * @brief functions related to starting services
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_constants.h"
+#include "gnunet_resolver_service.h"
+
+#if HAVE_MALLINFO
+#include <malloc.h>
+#include "gauger.h"
+#endif
+
+
+/* ******************* access control ******************** */
+
+/**
+ * Check if the given IP address is in the list of IP addresses.
+ *
+ * @param list a list of networks
+ * @param add the IP to check (in network byte order)
+ * @return #GNUNET_NO if the IP is not in the list, #GNUNET_YES if it it is
+ */
+static int
+check_ipv4_listed (const struct GNUNET_STRINGS_IPv4NetworkPolicy *list,
+ const struct in_addr *add)
+{
+ unsigned int i;
+
+ if (NULL == list)
+ return GNUNET_NO;
+ i = 0;
+ while ((list[i].network.s_addr != 0) || (list[i].netmask.s_addr != 0))
+ {
+ if ((add->s_addr & list[i].netmask.s_addr) ==
+ (list[i].network.s_addr & list[i].netmask.s_addr))
+ return GNUNET_YES;
+ i++;
+ }
+ return GNUNET_NO;
+}
+
+
+/**
+ * Check if the given IP address is in the list of IP addresses.
+ *
+ * @param list a list of networks
+ * @param ip the IP to check (in network byte order)
+ * @return #GNUNET_NO if the IP is not in the list, #GNUNET_YES if it it is
+ */
+static int
+check_ipv6_listed (const struct GNUNET_STRINGS_IPv6NetworkPolicy *list,
+ const struct in6_addr *ip)
+{
+ unsigned int i;
+ unsigned int j;
+ struct in6_addr zero;
+
+ if (NULL == list)
+ return GNUNET_NO;
+ memset (&zero, 0, sizeof (struct in6_addr));
+ i = 0;
+NEXT:
+ while (0 != memcmp (&zero, &list[i].network, sizeof (struct in6_addr)))
+ {
+ for (j = 0; j < sizeof (struct in6_addr) / sizeof (int); j++)
+ if (((((int *) ip)[j] & ((int *) &list[i].netmask)[j])) !=
+ (((int *) &list[i].network)[j] & ((int *) &list[i].netmask)[j]))
+ {
+ i++;
+ goto NEXT;
+ }
+ return GNUNET_YES;
+ }
+ return GNUNET_NO;
+}
+
+
+/* ****************** service struct ****************** */
+
+
+/**
+ * Context for "service_task".
+ */
+struct GNUNET_SERVICE_Context
+{
+ /**
+ * Our configuration.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Handle for the server.
+ */
+ struct GNUNET_SERVER_Handle *server;
+
+ /**
+ * NULL-terminated array of addresses to bind to, NULL if we got pre-bound
+ * listen sockets.
+ */
+ struct sockaddr **addrs;
+
+ /**
+ * Name of our service.
+ */
+ const char *service_name;
+
+ /**
+ * Main service-specific task to run.
+ */
+ GNUNET_SERVICE_Main task;
+
+ /**
+ * Closure for @e task.
+ */
+ void *task_cls;
+
+ /**
+ * IPv4 addresses that are not allowed to connect.
+ */
+ struct GNUNET_STRINGS_IPv4NetworkPolicy *v4_denied;
+
+ /**
+ * IPv6 addresses that are not allowed to connect.
+ */
+ struct GNUNET_STRINGS_IPv6NetworkPolicy *v6_denied;
+
+ /**
+ * IPv4 addresses that are allowed to connect (if not
+ * set, all are allowed).
+ */
+ struct GNUNET_STRINGS_IPv4NetworkPolicy *v4_allowed;
+
+ /**
+ * IPv6 addresses that are allowed to connect (if not
+ * set, all are allowed).
+ */
+ struct GNUNET_STRINGS_IPv6NetworkPolicy *v6_allowed;
+
+ /**
+ * My (default) message handlers. Adjusted copy
+ * of "defhandlers".
+ */
+ struct GNUNET_SERVER_MessageHandler *my_handlers;
+
+ /**
+ * Array of the lengths of the entries in addrs.
+ */
+ socklen_t *addrlens;
+
+ /**
+ * NULL-terminated array of listen sockets we should take over.
+ */
+ struct GNUNET_NETWORK_Handle **lsocks;
+
+ /**
+ * Task ID of the shutdown task.
+ */
+ struct GNUNET_SCHEDULER_Task *shutdown_task;
+
+ /**
+ * Idle timeout for server.
+ */
+ struct GNUNET_TIME_Relative timeout;
+
+ /**
+ * Overall success/failure of the service start.
+ */
+ int ret;
+
+ /**
+ * If we are daemonizing, this FD is set to the
+ * pipe to the parent. Send '.' if we started
+ * ok, '!' if not. -1 if we are not daemonizing.
+ */
+ int ready_confirm_fd;
+
+ /**
+ * Do we close connections if we receive messages
+ * for which we have no handler?
+ */
+ int require_found;
+
+ /**
+ * Do we require a matching UID for UNIX domain socket connections?
+ * #GNUNET_NO means that the UID does not have to match (however,
+ * @e match_gid may still impose other access control checks).
+ */
+ int match_uid;
+
+ /**
+ * Do we require a matching GID for UNIX domain socket connections?
+ * Ignored if @e match_uid is #GNUNET_YES. Note that this is about
+ * checking that the client's UID is in our group OR that the
+ * client's GID is our GID. If both "match_gid" and @e match_uid are
+ * #GNUNET_NO, all users on the local system have access.
+ */
+ int match_gid;
+
+ /**
+ * Our options.
+ */
+ enum GNUNET_SERVICE_Options options;
+
+};
+
+
+/* ****************** message handlers ****************** */
+
+/**
+ * Send a 'TEST' message back to the client.
+ *
+ * @param cls the 'struct GNUNET_SERVER_Client' to send TEST to
+ * @param size number of bytes available in 'buf'
+ * @param buf where to copy the message
+ * @return number of bytes written to 'buf'
+ */
+static size_t
+write_test (void *cls, size_t size, void *buf)
+{
+ struct GNUNET_SERVER_Client *client = cls;
+ struct GNUNET_MessageHeader *msg;
+
+ if (size < sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return 0; /* client disconnected */
+ }
+ msg = (struct GNUNET_MessageHeader *) buf;
+ msg->type = htons (GNUNET_MESSAGE_TYPE_TEST);
+ msg->size = htons (sizeof (struct GNUNET_MessageHeader));
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return sizeof (struct GNUNET_MessageHeader);
+}
+
+
+/**
+ * Handler for TEST message.
+ *
+ * @param cls closure (refers to service)
+ * @param client identification of the client
+ * @param message the actual message
+ */
+static void
+handle_test (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ /* simply bounce message back to acknowledge */
+ if (NULL ==
+ GNUNET_SERVER_notify_transmit_ready (client,
+ sizeof (struct GNUNET_MessageHeader),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &write_test, client))
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+}
+
+
+/**
+ * Default handlers for all services. Will be copied and the
+ * "callback_cls" fields will be replaced with the specific service
+ * struct.
+ */
+static const struct GNUNET_SERVER_MessageHandler defhandlers[] = {
+ {&handle_test, NULL, GNUNET_MESSAGE_TYPE_TEST,
+ sizeof (struct GNUNET_MessageHeader)},
+ {NULL, NULL, 0, 0}
+};
+
+
+/* ****************** service core routines ************** */
+
+
+/**
+ * Check if access to the service is allowed from the given address.
+ *
+ * @param cls closure
+ * @param uc credentials, if available, otherwise NULL
+ * @param addr address
+ * @param addrlen length of address
+ * @return #GNUNET_YES to allow, #GNUNET_NO to deny, #GNUNET_SYSERR
+ * for unknown address family (will be denied).
+ */
+static int
+check_access (void *cls, const struct GNUNET_CONNECTION_Credentials *uc,
+ const struct sockaddr *addr, socklen_t addrlen)
+{
+ struct GNUNET_SERVICE_Context *sctx = cls;
+ const struct sockaddr_in *i4;
+ const struct sockaddr_in6 *i6;
+ int ret;
+
+ switch (addr->sa_family)
+ {
+ case AF_INET:
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
+ i4 = (const struct sockaddr_in *) addr;
+ ret = ((NULL == sctx->v4_allowed) ||
+ (check_ipv4_listed (sctx->v4_allowed, &i4->sin_addr))) &&
+ ((NULL == sctx->v4_denied) ||
+ (!check_ipv4_listed (sctx->v4_denied, &i4->sin_addr)));
+ break;
+ case AF_INET6:
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
+ i6 = (const struct sockaddr_in6 *) addr;
+ ret = ((NULL == sctx->v6_allowed) ||
+ (check_ipv6_listed (sctx->v6_allowed, &i6->sin6_addr))) &&
+ ((NULL == sctx->v6_denied) ||
+ (!check_ipv6_listed (sctx->v6_denied, &i6->sin6_addr)));
+ break;
+#ifndef WINDOWS
+ case AF_UNIX:
+ ret = GNUNET_OK; /* controlled using file-system ACL now */
+ break;
+#endif
+ default:
+ LOG (GNUNET_ERROR_TYPE_WARNING, _("Unknown address family %d\n"),
+ addr->sa_family);
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK != ret)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Access from `%s' denied to service `%s'\n"),
+ GNUNET_a2s (addr, addrlen),
+ sctx->service_name);
+ }
+ return ret;
+}
+
+
+/**
+ * Get the name of the file where we will
+ * write the PID of the service.
+ *
+ * @param sctx service context
+ * @return name of the file for the process ID
+ */
+static char *
+get_pid_file_name (struct GNUNET_SERVICE_Context *sctx)
+{
+ char *pif;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (sctx->cfg, sctx->service_name,
+ "PIDFILE", &pif))
+ return NULL;
+ return pif;
+}
+
+
+/**
+ * Parse an IPv4 access control list.
+ *
+ * @param ret location where to write the ACL (set)
+ * @param sctx service context to use to get the configuration
+ * @param option name of the ACL option to parse
+ * @return #GNUNET_SYSERR on parse error, #GNUNET_OK on success (including
+ * no ACL configured)
+ */
+static int
+process_acl4 (struct GNUNET_STRINGS_IPv4NetworkPolicy **ret,
+ struct GNUNET_SERVICE_Context *sctx,
+ const char *option)
+{
+ char *opt;
+
+ if (!GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name, option))
+ {
+ *ret = NULL;
+ return GNUNET_OK;
+ }
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
+ sctx->service_name,
+ option, &opt));
+ if (NULL == (*ret = GNUNET_STRINGS_parse_ipv4_policy (opt)))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Could not parse IPv4 network specification `%s' for `%s:%s'\n"),
+ opt, sctx->service_name, option);
+ GNUNET_free (opt);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_free (opt);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Parse an IPv6 access control list.
+ *
+ * @param ret location where to write the ACL (set)
+ * @param sctx service context to use to get the configuration
+ * @param option name of the ACL option to parse
+ * @return #GNUNET_SYSERR on parse error, #GNUNET_OK on success (including
+ * no ACL configured)
+ */
+static int
+process_acl6 (struct GNUNET_STRINGS_IPv6NetworkPolicy **ret,
+ struct GNUNET_SERVICE_Context *sctx,
+ const char *option)
+{
+ char *opt;
+
+ if (!GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name, option))
+ {
+ *ret = NULL;
+ return GNUNET_OK;
+ }
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
+ sctx->service_name,
+ option, &opt));
+ if (NULL == (*ret = GNUNET_STRINGS_parse_ipv6_policy (opt)))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Could not parse IPv6 network specification `%s' for `%s:%s'\n"),
+ opt, sctx->service_name, option);
+ GNUNET_free (opt);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_free (opt);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Add the given UNIX domain path as an address to the
+ * list (as the first entry).
+ *
+ * @param saddrs array to update
+ * @param saddrlens where to store the address length
+ * @param unixpath path to add
+ * @param abstract #GNUNET_YES to add an abstract UNIX domain socket. This
+ * parameter is ignore on systems other than LINUX
+ */
+static void
+add_unixpath (struct sockaddr **saddrs,
+ socklen_t *saddrlens,
+ const char *unixpath,
+ int abstract)
+{
+#ifdef AF_UNIX
+ struct sockaddr_un *un;
+
+ un = GNUNET_new (struct sockaddr_un);
+ un->sun_family = AF_UNIX;
+ strncpy (un->sun_path, unixpath, sizeof (un->sun_path) - 1);
+#ifdef LINUX
+ if (GNUNET_YES == abstract)
+ un->sun_path[0] = '\0';
+#endif
+#if HAVE_SOCKADDR_UN_SUN_LEN
+ un->sun_len = (u_char) sizeof (struct sockaddr_un);
+#endif
+ *saddrs = (struct sockaddr *) un;
+ *saddrlens = sizeof (struct sockaddr_un);
+#else
+ /* this function should never be called
+ * unless AF_UNIX is defined! */
+ GNUNET_assert (0);
+#endif
+}
+
+
+/**
+ * Get the list of addresses that a server for the given service
+ * should bind to.
+ *
+ * @param service_name name of the service
+ * @param cfg configuration (which specifies the addresses)
+ * @param addrs set (call by reference) to an array of pointers to the
+ * addresses the server should bind to and listen on; the
+ * array will be NULL-terminated (on success)
+ * @param addr_lens set (call by reference) to an array of the lengths
+ * of the respective `struct sockaddr` struct in the @a addrs
+ * array (on success)
+ * @return number of addresses found on success,
+ * #GNUNET_SYSERR if the configuration
+ * did not specify reasonable finding information or
+ * if it specified a hostname that could not be resolved;
+ * #GNUNET_NO if the number of addresses configured is
+ * zero (in this case, `*addrs` and `*addr_lens` will be
+ * set to NULL).
+ */
+int
+GNUNET_SERVICE_get_server_addresses (const char *service_name,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ struct sockaddr ***addrs,
+ socklen_t ** addr_lens)
+{
+ int disablev6;
+ struct GNUNET_NETWORK_Handle *desc;
+ unsigned long long port;
+ char *unixpath;
+ struct addrinfo hints;
+ struct addrinfo *res;
+ struct addrinfo *pos;
+ struct addrinfo *next;
+ unsigned int i;
+ int resi;
+ int ret;
+ int abstract;
+ struct sockaddr **saddrs;
+ socklen_t *saddrlens;
+ char *hostname;
+
+ *addrs = NULL;
+ *addr_lens = NULL;
+ desc = NULL;
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "DISABLEV6"))
+ {
+ if (GNUNET_SYSERR ==
+ (disablev6 =
+ GNUNET_CONFIGURATION_get_value_yesno (cfg, service_name, "DISABLEV6")))
+ return GNUNET_SYSERR;
+ }
+ else
+ disablev6 = GNUNET_NO;
+
+ if (! disablev6)
+ {
+ /* probe IPv6 support */
+ desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
+ if (NULL == desc)
+ {
+ if ((ENOBUFS == errno) || (ENOMEM == errno) || (ENFILE == errno) ||
+ (EACCES == errno))
+ {
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "socket");
+ return GNUNET_SYSERR;
+ }
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Disabling IPv6 support for service `%s', failed to create IPv6 socket: %s\n"),
+ service_name, STRERROR (errno));
+ disablev6 = GNUNET_YES;
+ }
+ else
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
+ desc = NULL;
+ }
+ }
+
+ port = 0;
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "PORT"))
+ {
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg, service_name,
+ "PORT", &port))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Require valid port number for service `%s' in configuration!\n"),
+ service_name);
+ }
+ if (port > 65535)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Require valid port number for service `%s' in configuration!\n"),
+ service_name);
+ return GNUNET_SYSERR;
+ }
+ }
+
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "BINDTO"))
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, service_name,
+ "BINDTO", &hostname));
+ }
+ else
+ hostname = NULL;
+
+ unixpath = NULL;
+ abstract = GNUNET_NO;
+#ifdef AF_UNIX
+ if ((GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (cfg, service_name, "UNIXPATH")) &&
+ (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_filename (cfg, service_name, "UNIXPATH",
+ &unixpath)) &&
+ (0 < strlen (unixpath)))
+ {
+ /* probe UNIX support */
+ struct sockaddr_un s_un;
+
+ if (strlen (unixpath) >= sizeof (s_un.sun_path))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("UNIXPATH `%s' too long, maximum length is %llu\n"), unixpath,
+ (unsigned long long) sizeof (s_un.sun_path));
+ unixpath = GNUNET_NETWORK_shorten_unixpath (unixpath);
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Using `%s' instead\n"),
+ unixpath);
+ }
+#ifdef LINUX
+ abstract = GNUNET_CONFIGURATION_get_value_yesno (cfg,
+ "TESTING",
+ "USE_ABSTRACT_SOCKETS");
+ if (GNUNET_SYSERR == abstract)
+ abstract = GNUNET_NO;
+#endif
+ if ((GNUNET_YES != abstract)
+ && (GNUNET_OK !=
+ GNUNET_DISK_directory_create_for_file (unixpath)))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
+ "mkdir",
+ unixpath);
+ }
+ if (NULL != unixpath)
+ {
+ desc = GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_STREAM, 0);
+ if (NULL == desc)
+ {
+ if ((ENOBUFS == errno) || (ENOMEM == errno) || (ENFILE == errno) ||
+ (EACCES == errno))
+ {
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "socket");
+ GNUNET_free_non_null (hostname);
+ GNUNET_free (unixpath);
+ return GNUNET_SYSERR;
+ }
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Disabling UNIX domain socket support for service `%s', failed to create UNIX domain socket: %s\n"),
+ service_name,
+ STRERROR (errno));
+ GNUNET_free (unixpath);
+ unixpath = NULL;
+ }
+ else
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
+ desc = NULL;
+ }
+ }
+#endif
+
+ if ((0 == port) && (NULL == unixpath))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Have neither PORT nor UNIXPATH for service `%s', but one is required\n"),
+ service_name);
+ GNUNET_free_non_null (hostname);
+ return GNUNET_SYSERR;
+ }
+ if (0 == port)
+ {
+ saddrs = GNUNET_malloc (2 * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc (2 * sizeof (socklen_t));
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ GNUNET_free_non_null (unixpath);
+ GNUNET_free_non_null (hostname);
+ *addrs = saddrs;
+ *addr_lens = saddrlens;
+ return 1;
+ }
+
+ if (NULL != hostname)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Resolving `%s' since that is where `%s' will bind to.\n",
+ hostname,
+ service_name);
+ memset (&hints, 0, sizeof (struct addrinfo));
+ if (disablev6)
+ hints.ai_family = AF_INET;
+ hints.ai_protocol = IPPROTO_TCP;
+ if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
+ (NULL == res))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to resolve `%s': %s\n"),
+ hostname,
+ gai_strerror (ret));
+ GNUNET_free (hostname);
+ GNUNET_free_non_null (unixpath);
+ return GNUNET_SYSERR;
+ }
+ next = res;
+ i = 0;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (pos->ai_family == AF_INET6))
+ continue;
+ i++;
+ }
+ if (0 == i)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to find %saddress for `%s'.\n"),
+ disablev6 ? "IPv4 " : "",
+ hostname);
+ freeaddrinfo (res);
+ GNUNET_free (hostname);
+ GNUNET_free_non_null (unixpath);
+ return GNUNET_SYSERR;
+ }
+ resi = i;
+ if (NULL != unixpath)
+ resi++;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ if (NULL != unixpath)
+ {
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ i++;
+ }
+ next = res;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (AF_INET6 == pos->ai_family))
+ continue;
+ if ((IPPROTO_TCP != pos->ai_protocol) && (0 != pos->ai_protocol))
+ continue; /* not TCP */
+ if ((SOCK_STREAM != pos->ai_socktype) && (0 != pos->ai_socktype))
+ continue; /* huh? */
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Service `%s' will bind to `%s'\n",
+ service_name, GNUNET_a2s (pos->ai_addr, pos->ai_addrlen));
+ if (AF_INET == pos->ai_family)
+ {
+ GNUNET_assert (sizeof (struct sockaddr_in) == pos->ai_addrlen);
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ GNUNET_assert (AF_INET6 == pos->ai_family);
+ GNUNET_assert (sizeof (struct sockaddr_in6) == pos->ai_addrlen);
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ }
+ i++;
+ }
+ GNUNET_free (hostname);
+ freeaddrinfo (res);
+ resi = i;
+ }
+ else
+ {
+ /* will bind against everything, just set port */
+ if (disablev6)
+ {
+ /* V4-only */
+ resi = 1;
+ if (NULL != unixpath)
+ resi++;
+ i = 0;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ if (NULL != unixpath)
+ {
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ i++;
+ }
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ /* dual stack */
+ resi = 2;
+ if (NULL != unixpath)
+ resi++;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ if (NULL != unixpath)
+ {
+ add_unixpath (saddrs, saddrlens, unixpath, abstract);
+ i++;
+ }
+ saddrlens[i] = sizeof (struct sockaddr_in6);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
+#endif
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ i++;
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ }
+ GNUNET_free_non_null (unixpath);
+ *addrs = saddrs;
+ *addr_lens = saddrlens;
+ return resi;
+}
+
+
+#ifdef MINGW
+/**
+ * Read listen sockets from the parent process (ARM).
+ *
+ * @param sctx service context to initialize
+ * @return #GNUNET_YES if ok, #GNUNET_NO if not ok (must bind yourself),
+ * and #GNUNET_SYSERR on error.
+ */
+static int
+receive_sockets_from_parent (struct GNUNET_SERVICE_Context *sctx)
+{
+ const char *env_buf;
+ int fail;
+ uint64_t count;
+ uint64_t i;
+ HANDLE lsocks_pipe;
+
+ env_buf = getenv ("GNUNET_OS_READ_LSOCKS");
+ if ((NULL == env_buf) || (strlen (env_buf) <= 0))
+ return GNUNET_NO;
+ /* Using W32 API directly here, because this pipe will
+ * never be used outside of this function, and it's just too much of a bother
+ * to create a GNUnet API that boxes a HANDLE (the way it is done with socks)
+ */
+ lsocks_pipe = (HANDLE) strtoul (env_buf, NULL, 10);
+ if ( (0 == lsocks_pipe) || (INVALID_HANDLE_VALUE == lsocks_pipe))
+ return GNUNET_NO;
+ fail = 1;
+ do
+ {
+ int ret;
+ int fail2;
+ DWORD rd;
+
+ ret = ReadFile (lsocks_pipe, &count, sizeof (count), &rd, NULL);
+ if ((0 == ret) || (sizeof (count) != rd) || (0 == count))
+ break;
+ sctx->lsocks =
+ GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle *) * (count + 1));
+
+ fail2 = 1;
+ for (i = 0; i < count; i++)
+ {
+ WSAPROTOCOL_INFOA pi;
+ uint64_t size;
+ SOCKET s;
+
+ ret = ReadFile (lsocks_pipe, &size, sizeof (size), &rd, NULL);
+ if ( (0 == ret) || (sizeof (size) != rd) || (sizeof (pi) != size) )
+ break;
+ ret = ReadFile (lsocks_pipe, &pi, sizeof (pi), &rd, NULL);
+ if ( (0 == ret) || (sizeof (pi) != rd))
+ break;
+ s = WSASocketA (pi.iAddressFamily, pi.iSocketType, pi.iProtocol, &pi, 0, WSA_FLAG_OVERLAPPED);
+ sctx->lsocks[i] = GNUNET_NETWORK_socket_box_native (s);
+ if (NULL == sctx->lsocks[i])
+ break;
+ else if (i == count - 1)
+ fail2 = 0;
+ }
+ if (fail2)
+ break;
+ sctx->lsocks[count] = NULL;
+ fail = 0;
+ }
+ while (fail);
+
+ CloseHandle (lsocks_pipe);
+
+ if (fail)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Could not access a pre-bound socket, will try to bind myself\n"));
+ for (i = 0; (i < count) && (NULL != sctx->lsocks[i]); i++)
+ GNUNET_break (0 == GNUNET_NETWORK_socket_close (sctx->lsocks[i]));
+ GNUNET_free_non_null (sctx->lsocks);
+ sctx->lsocks = NULL;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+#endif
+
+
+/**
+ * Setup addr, addrlen, idle_timeout
+ * based on configuration!
+ *
+ * Configuration may specify:
+ * - PORT (where to bind to for TCP)
+ * - UNIXPATH (where to bind to for UNIX domain sockets)
+ * - TIMEOUT (after how many ms does an inactive service timeout);
+ * - DISABLEV6 (disable support for IPv6, otherwise we use dual-stack)
+ * - BINDTO (hostname or IP address to bind to, otherwise we take everything)
+ * - ACCEPT_FROM (only allow connections from specified IPv4 subnets)
+ * - ACCEPT_FROM6 (only allow connections from specified IPv6 subnets)
+ * - REJECT_FROM (disallow allow connections from specified IPv4 subnets)
+ * - REJECT_FROM6 (disallow allow connections from specified IPv6 subnets)
+ *
+ * @param sctx service context to initialize
+ * @return #GNUNET_OK if configuration succeeded
+ */
+static int
+setup_service (struct GNUNET_SERVICE_Context *sctx)
+{
+ struct GNUNET_TIME_Relative idleout;
+ int tolerant;
+
+#ifndef MINGW
+ const char *nfds;
+ unsigned int cnt;
+ int flags;
+#endif
+
+ if (GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name, "TIMEOUT"))
+ {
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (sctx->cfg, sctx->service_name,
+ "TIMEOUT", &idleout))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Specified value for `%s' of service `%s' is invalid\n"),
+ "TIMEOUT", sctx->service_name);
+ return GNUNET_SYSERR;
+ }
+ sctx->timeout = idleout;
+ }
+ else
+ sctx->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
+
+ if (GNUNET_CONFIGURATION_have_value
+ (sctx->cfg, sctx->service_name, "TOLERANT"))
+ {
+ if (GNUNET_SYSERR ==
+ (tolerant =
+ GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->service_name,
+ "TOLERANT")))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Specified value for `%s' of service `%s' is invalid\n"),
+ "TOLERANT", sctx->service_name);
+ return GNUNET_SYSERR;
+ }
+ }
+ else
+ tolerant = GNUNET_NO;
+
+#ifndef MINGW
+ errno = 0;
+ if ((NULL != (nfds = getenv ("LISTEN_FDS"))) &&
+ (1 == SSCANF (nfds, "%u", &cnt)) && (cnt > 0) && (cnt < FD_SETSIZE) &&
+ (cnt + 4 < FD_SETSIZE))
+ {
+ sctx->lsocks =
+ GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle *) * (cnt + 1));
+ while (0 < cnt--)
+ {
+ flags = fcntl (3 + cnt, F_GETFD);
+ if ((flags < 0) || (0 != (flags & FD_CLOEXEC)) ||
+ (NULL ==
+ (sctx->lsocks[cnt] = GNUNET_NETWORK_socket_box_native (3 + cnt))))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Could not access pre-bound socket %u, will try to bind myself\n"),
+ (unsigned int) 3 + cnt);
+ cnt++;
+ while (sctx->lsocks[cnt] != NULL)
+ GNUNET_break (0 == GNUNET_NETWORK_socket_close (sctx->lsocks[cnt++]));
+ GNUNET_free (sctx->lsocks);
+ sctx->lsocks = NULL;
+ break;
+ }
+ }
+ unsetenv ("LISTEN_FDS");
+ }
+#else
+ if (getenv ("GNUNET_OS_READ_LSOCKS") != NULL)
+ {
+ receive_sockets_from_parent (sctx);
+ putenv ("GNUNET_OS_READ_LSOCKS=");
+ }
+#endif
+
+ if ((NULL == sctx->lsocks) &&
+ (GNUNET_SYSERR ==
+ GNUNET_SERVICE_get_server_addresses (sctx->service_name, sctx->cfg,
+ &sctx->addrs, &sctx->addrlens)))
+ return GNUNET_SYSERR;
+ sctx->require_found = tolerant ? GNUNET_NO : GNUNET_YES;
+ sctx->match_uid =
+ GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->service_name,
+ "UNIX_MATCH_UID");
+ sctx->match_gid =
+ GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->service_name,
+ "UNIX_MATCH_GID");
+ process_acl4 (&sctx->v4_denied, sctx, "REJECT_FROM");
+ process_acl4 (&sctx->v4_allowed, sctx, "ACCEPT_FROM");
+ process_acl6 (&sctx->v6_denied, sctx, "REJECT_FROM6");
+ process_acl6 (&sctx->v6_allowed, sctx, "ACCEPT_FROM6");
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Get the name of the user that'll be used
+ * to provide the service.
+ *
+ * @param sctx service context
+ * @return value of the 'USERNAME' option
+ */
+static char *
+get_user_name (struct GNUNET_SERVICE_Context *sctx)
+{
+ char *un;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (sctx->cfg, sctx->service_name,
+ "USERNAME", &un))
+ return NULL;
+ return un;
+}
+
+
+/**
+ * Write PID file.
+ *
+ * @param sctx service context
+ * @param pid PID to write (should be equal to 'getpid()'
+ * @return #GNUNET_OK on success (including no work to be done)
+ */
+static int
+write_pid_file (struct GNUNET_SERVICE_Context *sctx, pid_t pid)
+{
+ FILE *pidfd;
+ char *pif;
+ char *user;
+ char *rdir;
+ int len;
+
+ if (NULL == (pif = get_pid_file_name (sctx)))
+ return GNUNET_OK; /* no file desired */
+ user = get_user_name (sctx);
+ rdir = GNUNET_strdup (pif);
+ len = strlen (rdir);
+ while ((len > 0) && (rdir[len] != DIR_SEPARATOR))
+ len--;
+ rdir[len] = '\0';
+ if (0 != ACCESS (rdir, F_OK))
+ {
+ /* we get to create a directory -- and claim it
+ * as ours! */
+ (void) GNUNET_DISK_directory_create (rdir);
+ if ((NULL != user) && (0 < strlen (user)))
+ GNUNET_DISK_file_change_owner (rdir, user);
+ }
+ if (0 != ACCESS (rdir, W_OK | X_OK))
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "access", rdir);
+ GNUNET_free (rdir);
+ GNUNET_free_non_null (user);
+ GNUNET_free (pif);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_free (rdir);
+ pidfd = FOPEN (pif, "w");
+ if (NULL == pidfd)
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "fopen", pif);
+ GNUNET_free (pif);
+ GNUNET_free_non_null (user);
+ return GNUNET_SYSERR;
+ }
+ if (0 > FPRINTF (pidfd, "%u", pid))
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "fprintf", pif);
+ GNUNET_break (0 == FCLOSE (pidfd));
+ if ((NULL != user) && (0 < strlen (user)))
+ GNUNET_DISK_file_change_owner (pif, user);
+ GNUNET_free_non_null (user);
+ GNUNET_free (pif);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Task run during shutdown. Stops the server/service.
+ *
+ * @param cls the `struct GNUNET_SERVICE_Context`
+ */
+static void
+shutdown_task (void *cls)
+{
+ struct GNUNET_SERVICE_Context *service = cls;
+ struct GNUNET_SERVER_Handle *server = service->server;
+
+ service->shutdown_task = NULL;
+ if (0 != (service->options & GNUNET_SERVICE_OPTION_SOFT_SHUTDOWN))
+ GNUNET_SERVER_stop_listening (server);
+ else
+ GNUNET_SERVER_destroy (server);
+}
+
+
+/**
+ * Initial task for the service.
+ *
+ * @param cls service context
+ */
+static void
+service_task (void *cls)
+{
+ struct GNUNET_SERVICE_Context *sctx = cls;
+ unsigned int i;
+
+ GNUNET_RESOLVER_connect (sctx->cfg);
+ if (NULL != sctx->lsocks)
+ sctx->server
+ = GNUNET_SERVER_create_with_sockets (&check_access, sctx, sctx->lsocks,
+ sctx->timeout, sctx->require_found);
+ else
+ sctx->server
+ = GNUNET_SERVER_create (&check_access, sctx, sctx->addrs, sctx->addrlens,
+ sctx->timeout, sctx->require_found);
+ if (NULL == sctx->server)
+ {
+ if (NULL != sctx->addrs)
+ for (i = 0; NULL != sctx->addrs[i]; i++)
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Failed to start `%s' at `%s'\n"),
+ sctx->service_name, GNUNET_a2s (sctx->addrs[i], sctx->addrlens[i]));
+ sctx->ret = GNUNET_SYSERR;
+ return;
+ }
+#ifndef WINDOWS
+ if (NULL != sctx->addrs)
+ for (i = 0; NULL != sctx->addrs[i]; i++)
+ if ((AF_UNIX == sctx->addrs[i]->sa_family)
+ && ('\0' != ((const struct sockaddr_un *)sctx->addrs[i])->sun_path[0]))
+ GNUNET_DISK_fix_permissions (((const struct sockaddr_un *)sctx->addrs[i])->sun_path,
+ sctx->match_uid,
+ sctx->match_gid);
+#endif
+
+
+ if (0 == (sctx->options & GNUNET_SERVICE_OPTION_MANUAL_SHUTDOWN))
+ {
+ /* install a task that will kill the server
+ * process if the scheduler ever gets a shutdown signal */
+ sctx->shutdown_task = GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
+ sctx);
+ }
+ sctx->my_handlers = GNUNET_malloc (sizeof (defhandlers));
+ GNUNET_memcpy (sctx->my_handlers, defhandlers, sizeof (defhandlers));
+ i = 0;
+ while (NULL != sctx->my_handlers[i].callback)
+ sctx->my_handlers[i++].callback_cls = sctx;
+ GNUNET_SERVER_add_handlers (sctx->server, sctx->my_handlers);
+ if (-1 != sctx->ready_confirm_fd)
+ {
+ GNUNET_break (1 == WRITE (sctx->ready_confirm_fd, ".", 1));
+ GNUNET_break (0 == CLOSE (sctx->ready_confirm_fd));
+ sctx->ready_confirm_fd = -1;
+ write_pid_file (sctx, getpid ());
+ }
+ if (NULL != sctx->addrs)
+ {
+ i = 0;
+ while (NULL != sctx->addrs[i])
+ {
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Service `%s' runs at %s\n"),
+ sctx->service_name, GNUNET_a2s (sctx->addrs[i], sctx->addrlens[i]));
+ i++;
+ }
+ }
+ sctx->task (sctx->task_cls, sctx->server, sctx->cfg);
+}
+
+
+/**
+ * Detach from terminal.
+ *
+ * @param sctx service context
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+static int
+detach_terminal (struct GNUNET_SERVICE_Context *sctx)
+{
+#ifndef MINGW
+ pid_t pid;
+ int nullfd;
+ int filedes[2];
+
+ if (0 != PIPE (filedes))
+ {
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "pipe");
+ return GNUNET_SYSERR;
+ }
+ pid = fork ();
+ if (pid < 0)
+ {
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "fork");
+ return GNUNET_SYSERR;
+ }
+ if (0 != pid)
+ {
+ /* Parent */
+ char c;
+
+ GNUNET_break (0 == CLOSE (filedes[1]));
+ c = 'X';
+ if (1 != READ (filedes[0], &c, sizeof (char)))
+ LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "read");
+ fflush (stdout);
+ switch (c)
+ {
+ case '.':
+ exit (0);
+ case 'I':
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Service process failed to initialize\n"));
+ break;
+ case 'S':
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Service process could not initialize server function\n"));
+ break;
+ case 'X':
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Service process failed to report status\n"));
+ break;
+ }
+ exit (1); /* child reported error */
+ }
+ GNUNET_break (0 == CLOSE (0));
+ GNUNET_break (0 == CLOSE (1));
+ GNUNET_break (0 == CLOSE (filedes[0]));
+ nullfd = OPEN ("/dev/null", O_RDWR | O_APPEND);
+ if (nullfd < 0)
+ return GNUNET_SYSERR;
+ /* set stdin/stdout to /dev/null */
+ if ((dup2 (nullfd, 0) < 0) || (dup2 (nullfd, 1) < 0))
+ {
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "dup2");
+ (void) CLOSE (nullfd);
+ return GNUNET_SYSERR;
+ }
+ (void) CLOSE (nullfd);
+ /* Detach from controlling terminal */
+ pid = setsid ();
+ if (-1 == pid)
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "setsid");
+ sctx->ready_confirm_fd = filedes[1];
+#else
+ /* FIXME: we probably need to do something else
+ * elsewhere in order to fork the process itself... */
+ FreeConsole ();
+#endif
+ return GNUNET_OK;
+}
+
+
+/**
+ * Set user ID.
+ *
+ * @param sctx service context
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+static int
+set_user_id (struct GNUNET_SERVICE_Context *sctx)
+{
+ char *user;
+
+ if (NULL == (user = get_user_name (sctx)))
+ return GNUNET_OK; /* keep */
+#ifndef MINGW
+ struct passwd *pws;
+
+ errno = 0;
+ pws = getpwnam (user);
+ if (NULL == pws)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Cannot obtain information about user `%s': %s\n"), user,
+ errno == 0 ? _("No such user") : STRERROR (errno));
+ GNUNET_free (user);
+ return GNUNET_SYSERR;
+ }
+ if ((0 != setgid (pws->pw_gid)) || (0 != setegid (pws->pw_gid)) ||
+#if HAVE_INITGROUPS
+ (0 != initgroups (user, pws->pw_gid)) ||
+#endif
+ (0 != setuid (pws->pw_uid)) || (0 != seteuid (pws->pw_uid)))
+ {
+ if ((0 != setregid (pws->pw_gid, pws->pw_gid)) ||
+ (0 != setreuid (pws->pw_uid, pws->pw_uid)))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot change user/group to `%s': %s\n"),
+ user, STRERROR (errno));
+ GNUNET_free (user);
+ return GNUNET_SYSERR;
+ }
+ }
+#endif
+ GNUNET_free (user);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Delete the PID file that was created by our parent.
+ *
+ * @param sctx service context
+ */
+static void
+pid_file_delete (struct GNUNET_SERVICE_Context *sctx)
+{
+ char *pif = get_pid_file_name (sctx);
+
+ if (NULL == pif)
+ return; /* no PID file */
+ if (0 != UNLINK (pif))
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "unlink", pif);
+ GNUNET_free (pif);
+}
+
+
+/**
+ * Run a standard GNUnet service startup sequence (initialize loggers
+ * and configuration, parse options).
+ *
+ * @param argc number of command line arguments
+ * @param argv command line arguments
+ * @param service_name our service name
+ * @param options service options
+ * @param task main task of the service
+ * @param task_cls closure for @a task
+ * @return #GNUNET_SYSERR on error, #GNUNET_OK
+ * if we shutdown nicely
+ */
+int
+GNUNET_SERVICE_run (int argc, char *const *argv,
+ const char *service_name,
+ enum GNUNET_SERVICE_Options options,
+ GNUNET_SERVICE_Main task,
+ void *task_cls)
+{
+#define HANDLE_ERROR do { GNUNET_break (0); goto shutdown; } while (0)
+
+ int err;
+ int ret;
+ char *cfg_fn;
+ char *opt_cfg_fn;
+ char *loglev;
+ char *logfile;
+ int do_daemonize;
+ unsigned int i;
+ unsigned long long skew_offset;
+ unsigned long long skew_variance;
+ long long clock_offset;
+ struct GNUNET_SERVICE_Context sctx;
+ struct GNUNET_CONFIGURATION_Handle *cfg;
+ const char *xdg;
+
+ struct GNUNET_GETOPT_CommandLineOption service_options[] = {
+ GNUNET_GETOPT_OPTION_CFG_FILE (&opt_cfg_fn),
+ {'d', "daemonize", NULL,
+ gettext_noop ("do daemonize (detach from terminal)"), 0,
+ GNUNET_GETOPT_set_one, &do_daemonize},
+ GNUNET_GETOPT_OPTION_HELP (NULL),
+ GNUNET_GETOPT_OPTION_LOGLEVEL (&loglev),
+ GNUNET_GETOPT_OPTION_LOGFILE (&logfile),
+ GNUNET_GETOPT_OPTION_VERSION (PACKAGE_VERSION " " VCS_VERSION),
+ GNUNET_GETOPT_OPTION_END
+ };
+ err = 1;
+ do_daemonize = 0;
+ logfile = NULL;
+ loglev = NULL;
+ opt_cfg_fn = NULL;
+ xdg = getenv ("XDG_CONFIG_HOME");
+ if (NULL != xdg)
+ GNUNET_asprintf (&cfg_fn,
+ "%s%s%s",
+ xdg,
+ DIR_SEPARATOR_STR,
+ GNUNET_OS_project_data_get ()->config_file);
+ else
+ cfg_fn = GNUNET_strdup (GNUNET_OS_project_data_get ()->user_config_file);
+ memset (&sctx, 0, sizeof (sctx));
+ sctx.options = options;
+ sctx.ready_confirm_fd = -1;
+ sctx.ret = GNUNET_OK;
+ sctx.timeout = GNUNET_TIME_UNIT_FOREVER_REL;
+ sctx.task = task;
+ sctx.task_cls = task_cls;
+ sctx.service_name = service_name;
+ sctx.cfg = cfg = GNUNET_CONFIGURATION_create ();
+
+ /* setup subsystems */
+ ret = GNUNET_GETOPT_run (service_name, service_options, argc, argv);
+ if (GNUNET_SYSERR == ret)
+ goto shutdown;
+ if (GNUNET_NO == ret)
+ {
+ err = 0;
+ goto shutdown;
+ }
+ if (GNUNET_OK != GNUNET_log_setup (service_name, loglev, logfile))
+ HANDLE_ERROR;
+ if (NULL == opt_cfg_fn)
+ opt_cfg_fn = GNUNET_strdup (cfg_fn);
+ if (GNUNET_YES == GNUNET_DISK_file_test (opt_cfg_fn))
+ {
+ if (GNUNET_SYSERR == GNUNET_CONFIGURATION_load (cfg, opt_cfg_fn))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Malformed configuration file `%s', exit ...\n"),
+ opt_cfg_fn);
+ goto shutdown;
+ }
+ }
+ else
+ {
+ if (GNUNET_SYSERR == GNUNET_CONFIGURATION_load (cfg, NULL))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Malformed configuration, exit ...\n"));
+ goto shutdown;
+ }
+ if (0 != strcmp (opt_cfg_fn, cfg_fn))
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Could not access configuration file `%s'\n"),
+ opt_cfg_fn);
+ }
+ if (GNUNET_OK != setup_service (&sctx))
+ goto shutdown;
+ if ((1 == do_daemonize) && (GNUNET_OK != detach_terminal (&sctx)))
+ HANDLE_ERROR;
+ if (GNUNET_OK != set_user_id (&sctx))
+ goto shutdown;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Service `%s' runs with configuration from `%s'\n",
+ service_name,
+ opt_cfg_fn);
+ if ((GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_number (sctx.cfg, "TESTING",
+ "SKEW_OFFSET", &skew_offset)) &&
+ (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_number (sctx.cfg, "TESTING",
+ "SKEW_VARIANCE", &skew_variance)))
+ {
+ clock_offset = skew_offset - skew_variance;
+ GNUNET_TIME_set_offset (clock_offset);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Skewing clock by %dll ms\n", clock_offset);
+ }
+ /* actually run service */
+ err = 0;
+ GNUNET_SCHEDULER_run (&service_task, &sctx);
+ /* shutdown */
+ if ((1 == do_daemonize) && (NULL != sctx.server))
+ pid_file_delete (&sctx);
+ GNUNET_free_non_null (sctx.my_handlers);
+
+shutdown:
+ if (-1 != sctx.ready_confirm_fd)
+ {
+ if (1 != WRITE (sctx.ready_confirm_fd, err ? "I" : "S", 1))
+ LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "write");
+ GNUNET_break (0 == CLOSE (sctx.ready_confirm_fd));
+ }
+#if HAVE_MALLINFO
+ {
+ char *counter;
+
+ if ( (GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (sctx.cfg, service_name,
+ "GAUGER_HEAP")) &&
+ (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (sctx.cfg, service_name,
+ "GAUGER_HEAP",
+ &counter)) )
+ {
+ struct mallinfo mi;
+
+ mi = mallinfo ();
+ GAUGER (service_name, counter, mi.usmblks, "blocks");
+ GNUNET_free (counter);
+ }
+ }
+#endif
+ GNUNET_CONFIGURATION_destroy (cfg);
+ i = 0;
+ if (NULL != sctx.addrs)
+ while (NULL != sctx.addrs[i])
+ GNUNET_free (sctx.addrs[i++]);
+ GNUNET_free_non_null (sctx.addrs);
+ GNUNET_free_non_null (sctx.addrlens);
+ GNUNET_free_non_null (logfile);
+ GNUNET_free_non_null (loglev);
+ GNUNET_free (cfg_fn);
+ GNUNET_free_non_null (opt_cfg_fn);
+ GNUNET_free_non_null (sctx.v4_denied);
+ GNUNET_free_non_null (sctx.v6_denied);
+ GNUNET_free_non_null (sctx.v4_allowed);
+ GNUNET_free_non_null (sctx.v6_allowed);
+
+ return err ? GNUNET_SYSERR : sctx.ret;
+}
+
+
+/**
+ * Run a service startup sequence within an existing
+ * initialized system.
+ *
+ * @param service_name our service name
+ * @param cfg configuration to use
+ * @param options service options
+ * @return NULL on error, service handle
+ */
+struct GNUNET_SERVICE_Context *
+GNUNET_SERVICE_start (const char *service_name,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ enum GNUNET_SERVICE_Options options)
+{
+ int i;
+ struct GNUNET_SERVICE_Context *sctx;
+
+ sctx = GNUNET_new (struct GNUNET_SERVICE_Context);
+ sctx->ready_confirm_fd = -1; /* no daemonizing */
+ sctx->ret = GNUNET_OK;
+ sctx->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
+ sctx->service_name = service_name;
+ sctx->cfg = cfg;
+ sctx->options = options;
+
+ /* setup subsystems */
+ if (GNUNET_OK != setup_service (sctx))
+ {
+ GNUNET_SERVICE_stop (sctx);
+ return NULL;
+ }
+ if (NULL != sctx->lsocks)
+ sctx->server =
+ GNUNET_SERVER_create_with_sockets (&check_access, sctx, sctx->lsocks,
+ sctx->timeout, sctx->require_found);
+ else
+ sctx->server =
+ GNUNET_SERVER_create (&check_access, sctx, sctx->addrs, sctx->addrlens,
+ sctx->timeout, sctx->require_found);
+
+ if (NULL == sctx->server)
+ {
+ GNUNET_SERVICE_stop (sctx);
+ return NULL;
+ }
+#ifndef WINDOWS
+ if (NULL != sctx->addrs)
+ for (i = 0; NULL != sctx->addrs[i]; i++)
+ if ((AF_UNIX == sctx->addrs[i]->sa_family)
+ && ('\0' != ((const struct sockaddr_un *)sctx->addrs[i])->sun_path[0]))
+ GNUNET_DISK_fix_permissions (((const struct sockaddr_un *)sctx->addrs[i])->sun_path,
+ sctx->match_uid,
+ sctx->match_gid);
+#endif
+ sctx->my_handlers = GNUNET_malloc (sizeof (defhandlers));
+ GNUNET_memcpy (sctx->my_handlers, defhandlers, sizeof (defhandlers));
+ i = 0;
+ while ((sctx->my_handlers[i].callback != NULL))
+ sctx->my_handlers[i++].callback_cls = sctx;
+ GNUNET_SERVER_add_handlers (sctx->server, sctx->my_handlers);
+ return sctx;
+}
+
+
+/**
+ * Obtain the server used by a service. Note that the server must NOT
+ * be destroyed by the caller.
+ *
+ * @param ctx the service context returned from the start function
+ * @return handle to the server for this service, NULL if there is none
+ */
+struct GNUNET_SERVER_Handle *
+GNUNET_SERVICE_get_server (struct GNUNET_SERVICE_Context *ctx)
+{
+ return ctx->server;
+}
+
+
+/**
+ * Get the NULL-terminated array of listen sockets for this service.
+ *
+ * @param ctx service context to query
+ * @return NULL if there are no listen sockets, otherwise NULL-terminated
+ * array of listen sockets.
+ */
+struct GNUNET_NETWORK_Handle *const*
+GNUNET_SERVICE_get_listen_sockets (struct GNUNET_SERVICE_Context *ctx)
+{
+ return ctx->lsocks;
+}
+
+
+/**
+ * Stop a service that was started with "GNUNET_SERVICE_start".
+ *
+ * @param sctx the service context returned from the start function
+ */
+void
+GNUNET_SERVICE_stop (struct GNUNET_SERVICE_Context *sctx)
+{
+ unsigned int i;
+
+#if HAVE_MALLINFO
+ {
+ char *counter;
+
+ if ( (GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name,
+ "GAUGER_HEAP")) &&
+ (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (sctx->cfg, sctx->service_name,
+ "GAUGER_HEAP",
+ &counter)) )
+ {
+ struct mallinfo mi;
+
+ mi = mallinfo ();
+ GAUGER (sctx->service_name, counter, mi.usmblks, "blocks");
+ GNUNET_free (counter);
+ }
+ }
+#endif
+ if (NULL != sctx->shutdown_task)
+ {
+ GNUNET_SCHEDULER_cancel (sctx->shutdown_task);
+ sctx->shutdown_task = NULL;
+ }
+ if (NULL != sctx->server)
+ GNUNET_SERVER_destroy (sctx->server);
+ GNUNET_free_non_null (sctx->my_handlers);
+ if (NULL != sctx->addrs)
+ {
+ i = 0;
+ while (NULL != sctx->addrs[i])
+ GNUNET_free (sctx->addrs[i++]);
+ GNUNET_free (sctx->addrs);
+ }
+ GNUNET_free_non_null (sctx->addrlens);
+ GNUNET_free_non_null (sctx->v4_denied);
+ GNUNET_free_non_null (sctx->v6_denied);
+ GNUNET_free_non_null (sctx->v4_allowed);
+ GNUNET_free_non_null (sctx->v6_allowed);
+ GNUNET_free (sctx);
+}
+
+
+/* end of service.c */