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- /*
- 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 Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- 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
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @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 LEGACY_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.
- */
- LEGACY_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 LEGACY_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 LEGACY_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;
- case AF_UNIX:
- ret = GNUNET_OK; /* controlled using file-system ACL now */
- break;
- 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 LEGACY_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 LEGACY_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 LEGACY_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;
- GNUNET_strlcpy (un->sun_path, unixpath, sizeof(un->sun_path));
- #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
- LEGACY_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;
- }
- /**
- * 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 LEGACY_SERVICE_Context *sctx)
- {
- struct GNUNET_TIME_Relative idleout;
- int tolerant;
- const char *nfds;
- unsigned int cnt;
- int flags;
- 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;
- 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");
- }
- if ((NULL == sctx->lsocks) &&
- (GNUNET_SYSERR == LEGACY_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 LEGACY_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 LEGACY_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 LEGACY_SERVICE_Context`
- */
- static void
- shutdown_task (void *cls)
- {
- struct LEGACY_SERVICE_Context *service = cls;
- struct GNUNET_SERVER_Handle *server = service->server;
- service->shutdown_task = NULL;
- if (0 != (service->options & LEGACY_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 LEGACY_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;
- }
- 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);
- if (0 == (sctx->options & LEGACY_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 LEGACY_SERVICE_Context *sctx)
- {
- 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];
- 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 LEGACY_SERVICE_Context *sctx)
- {
- char *user;
- if (NULL == (user = get_user_name (sctx)))
- return GNUNET_OK; /* keep */
- 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;
- }
- }
- 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 LEGACY_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
- LEGACY_SERVICE_run (int argc,
- char *const *argv,
- const char *service_name,
- enum LEGACY_SERVICE_Options options,
- LEGACY_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 LEGACY_SERVICE_Context sctx;
- struct GNUNET_CONFIGURATION_Handle *cfg;
- const char *xdg;
- struct GNUNET_GETOPT_CommandLineOption service_options[] =
- { GNUNET_GETOPT_option_cfgfile (&opt_cfg_fn),
- GNUNET_GETOPT_option_flag ('d',
- "daemonize",
- gettext_noop (
- "do daemonize (detach from terminal)"),
- &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_nz (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 LEGACY_SERVICE_Context *
- LEGACY_SERVICE_start (const char *service_name,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- enum LEGACY_SERVICE_Options options)
- {
- int i;
- struct LEGACY_SERVICE_Context *sctx;
- sctx = GNUNET_new (struct LEGACY_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))
- {
- LEGACY_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)
- {
- LEGACY_SERVICE_stop (sctx);
- return NULL;
- }
- 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);
- 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 *
- LEGACY_SERVICE_get_server (struct LEGACY_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 *
- LEGACY_SERVICE_get_listen_sockets (struct LEGACY_SERVICE_Context *ctx)
- {
- return ctx->lsocks;
- }
- /**
- * Stop a service that was started with "LEGACY_SERVICE_start".
- *
- * @param sctx the service context returned from the start function
- */
- void
- LEGACY_SERVICE_stop (struct LEGACY_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_nz (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 */
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