/* Unix SMB/CIFS implementation. Copyright (C) Stefan Metzmacher 2009 ** NOTE! The following LGPL license applies to the tsocket ** library. This does NOT imply that all of Samba is released ** under the LGPL This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _TSOCKET_H #define _TSOCKET_H #include <talloc.h> #include <tevent.h> struct tsocket_address; struct tdgram_context; struct tstream_context; struct iovec; /** * @mainpage * * The tsocket abstraction is an API ... */ /** * @defgroup tsocket The tsocket API * * The tsocket abstraction is split into two different kinds of * communication interfaces. * * There's the "tstream_context" interface with abstracts the communication * through a bidirectional byte stream between two endpoints. * * And there's the "tdgram_context" interface with abstracts datagram based * communication between any number of endpoints. * * Both interfaces share the "tsocket_address" abstraction for endpoint * addresses. * * The whole library is based on the talloc(3) and 'tevent' libraries and * provides "tevent_req" based "foo_send()"/"foo_recv()" functions pairs for * all abstracted methods that need to be async. * * @section vsock Virtual Sockets * * The abstracted layout of tdgram_context and tstream_context allow * implementations around virtual sockets for encrypted tunnels (like TLS, * SASL or GSSAPI) or named pipes over smb. * * @section npa Named Pipe Auth (NPA) Sockets * * Samba has an implementation to abstract named pipes over smb (within the * server side). See libcli/named_pipe_auth/npa_tstream.[ch] for the core code. * The current callers are located in source4/ntvfs/ipc/vfs_ipc.c and * source4/rpc_server/service_rpc.c for the users. */ /** * @defgroup tsocket_address The tsocket_address abstraction * @ingroup tsocket * * The tsocket_address represents an socket endpoint genericly. * As it's like an abstract class it has no specific constructor. * The specific constructors are descripted in later sections. * * @{ */ /** * @brief Get a string representaion of the endpoint. * * This function creates a string representation of the endpoint for debugging. * The output will look as followed: * prefix:address:port * * e.g. * ipv4:192.168.1.1:143 * * Callers should not try to parse the string! The should use additional methods * of the specific tsocket_address implemention to get more details. * * @param[in] addr The address to convert. * * @param[in] mem_ctx The talloc memory context to allocate the memory. * * @return The address as a string representation, NULL on error. * * @see tsocket_address_is_inet() * @see tsocket_address_inet_addr_string() * @see tsocket_address_inet_port() */ char *tsocket_address_string(const struct tsocket_address *addr, TALLOC_CTX *mem_ctx); #ifdef DOXYGEN /** * @brief This creates a copy of a tsocket_address. * * This is useful when before doing modifications to a socket via additional * methods of the specific tsocket_address implementation. * * @param[in] addr The address to create the copy from. * * @param[in] mem_ctx The talloc memory context to use. * * @return A newly allocated copy of addr (tsocket_address *), NULL * on error. */ struct tsocket_address *tsocket_address_copy(const struct tsocket_address *addr, TALLOC_CTX *mem_ctx); #else struct tsocket_address *_tsocket_address_copy(const struct tsocket_address *addr, TALLOC_CTX *mem_ctx, const char *location); #define tsocket_address_copy(addr, mem_ctx) \ _tsocket_address_copy(addr, mem_ctx, __location__) #endif /** * @} */ /** * @defgroup tdgram_context The tdgram_context abstraction * @ingroup tsocket * * The tdgram_context is like an abstract class for datagram based sockets. The * interface provides async 'tevent_req' based functions on top functionality * is similar to the recvfrom(2)/sendto(2)/close(2) syscalls. * * @note You can always use talloc_free(tdgram) to cleanup the resources * of the tdgram_context on a fatal error. * @{ */ /** * @brief Ask for next available datagram on the abstracted tdgram_context. * * It returns a 'tevent_req' handle, where the caller can register * a callback with tevent_req_set_callback(). The callback is triggered * when a datagram is available or an error happened. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] dgram The dgram context to work on. * * @return Returns a 'tevent_req' handle, where the caller can * register a callback with tevent_req_set_callback(). * NULL on fatal error. * * @see tdgram_inet_udp_socket() * @see tdgram_unix_socket() */ struct tevent_req *tdgram_recvfrom_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tdgram_context *dgram); /** * @brief Receive the next available datagram on the abstracted tdgram_context. * * This function should be called by the callback when a datagram is available * or an error happened. * * The caller can only have one outstanding tdgram_recvfrom_send() at a time * otherwise the caller will get '*perrno = EBUSY'. * * @param[in] req The tevent request from tdgram_recvfrom_send(). * * @param[out] perrno The error number, set if an error occurred. * * @param[in] mem_ctx The memory context to use. * * @param[out] buf This will hold the buffer of the datagram. * * @param[out] src The abstracted tsocket_address of the sender of the * received datagram. * * @return The length of the datagram (0 is never returned!), * -1 on error with perrno set to the actual errno. * * @see tdgram_recvfrom_send() */ ssize_t tdgram_recvfrom_recv(struct tevent_req *req, int *perrno, TALLOC_CTX *mem_ctx, uint8_t **buf, struct tsocket_address **src); /** * @brief Send a datagram to a destination endpoint. * * The function can be called to send a datagram (specified by a buf/len) to a * destination endpoint (specified by dst). It's not allowed for len to be 0. * * It returns a 'tevent_req' handle, where the caller can register a callback * with tevent_req_set_callback(). The callback is triggered when the specific * implementation (assumes it) has delivered the datagram to the "wire". * * The callback is then supposed to get the result by calling * tdgram_sendto_recv() on the 'tevent_req'. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] dgram The dgram context to work on. * * @param[in] buf The buffer to send. * * @param[in] len The length of the buffer to send. It has to be bigger * than 0. * * @param[in] dst The destination to send the datagram to in form of a * tsocket_address. * * @return Returns a 'tevent_req' handle, where the caller can * register a callback with tevent_req_set_callback(). * NULL on fatal error. * * @see tdgram_inet_udp_socket() * @see tdgram_unix_socket() * @see tdgram_sendto_recv() */ struct tevent_req *tdgram_sendto_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tdgram_context *dgram, const uint8_t *buf, size_t len, const struct tsocket_address *dst); /** * @brief Receive the result of the sent datagram. * * The caller can only have one outstanding tdgram_sendto_send() at a time * otherwise the caller will get '*perrno = EBUSY'. * * @param[in] req The tevent request from tdgram_sendto_send(). * * @param[out] perrno The error number, set if an error occurred. * * @return The length of the datagram (0 is never returned!), -1 on * error with perrno set to the actual errno. * * @see tdgram_sendto_send() */ ssize_t tdgram_sendto_recv(struct tevent_req *req, int *perrno); /** * @brief Shutdown/close an abstracted socket. * * It returns a 'tevent_req' handle, where the caller can register a callback * with tevent_req_set_callback(). The callback is triggered when the specific * implementation (assumes it) has delivered the datagram to the "wire". * * The callback is then supposed to get the result by calling * tdgram_sendto_recv() on the 'tevent_req'. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] dgram The dgram context diconnect from. * * @return Returns a 'tevent_req' handle, where the caller can * register a callback with tevent_req_set_callback(). * NULL on fatal error. * * @see tdgram_disconnect_recv() */ struct tevent_req *tdgram_disconnect_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tdgram_context *dgram); /** * @brief Receive the result from a tdgram_disconnect_send() request. * * The caller should make sure there're no outstanding tdgram_recvfrom_send() * and tdgram_sendto_send() calls otherwise the caller will get * '*perrno = EBUSY'. * * @param[in] req The tevent request from tdgram_disconnect_send(). * * @param[out] perrno The error number, set if an error occurred. * * @return The length of the datagram (0 is never returned!), -1 on * error with perrno set to the actual errno. * * @see tdgram_disconnect_send() */ int tdgram_disconnect_recv(struct tevent_req *req, int *perrno); /** * @} */ /** * @defgroup tstream_context The tstream_context abstraction * @ingroup tsocket * * The tstream_context is like an abstract class for stream based sockets. The * interface provides async 'tevent_req' based functions on top functionality * is similar to the readv(2)/writev(2)/close(2) syscalls. * * @note You can always use talloc_free(tstream) to cleanup the resources * of the tstream_context on a fatal error. * * @{ */ /** * @brief Report the number of bytes received but not consumed yet. * * The tstream_pending_bytes() function reports how much bytes of the incoming * stream have been received but not consumed yet. * * @param[in] stream The tstream_context to check for pending bytes. * * @return The number of bytes received, -1 on error with errno * set. */ ssize_t tstream_pending_bytes(struct tstream_context *stream); /** * @brief Read a specific amount of bytes from a stream socket. * * The function can be called to read for a specific amount of bytes from the * stream into given buffers. The caller has to preallocate the buffers. * * The caller might need to use tstream_pending_bytes() if the protocol doesn't * have a fixed pdu header containing the pdu size. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] stream The tstream context to work on. * * @param[out] vector A preallocated iovec to store the data to read. * * @param[in] count The number of buffers in the vector allocated. * * @return A 'tevent_req' handle, where the caller can register * a callback with tevent_req_set_callback(). NULL on * fatal error. * * @see tstream_unix_connect_send() * @see tstream_inet_tcp_connect_send() */ struct tevent_req *tstream_readv_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tstream_context *stream, struct iovec *vector, size_t count); /** * @brief Get the result of a tstream_readv_send(). * * The caller can only have one outstanding tstream_readv_send() * at a time otherwise the caller will get *perrno = EBUSY. * * @param[in] req The tevent request from tstream_readv_send(). * * @param[out] perrno The error number, set if an error occurred. * * @return The length of the stream (0 is never returned!), -1 on * error with perrno set to the actual errno. */ int tstream_readv_recv(struct tevent_req *req, int *perrno); /** * @brief Write buffers from a vector into a stream socket. * * The function can be called to write buffers from a given vector * to a stream socket. * * You have to ensure that the vector is not empty. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] stream The tstream context to work on. * * @param[in] vector The iovec vector with data to write on a stream socket. * * @param[in] count The number of buffers in the vector to write. * * @return A 'tevent_req' handle, where the caller can register * a callback with tevent_req_set_callback(). NULL on * fatal error. */ struct tevent_req *tstream_writev_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tstream_context *stream, const struct iovec *vector, size_t count); /** * @brief Get the result of a tstream_writev_send(). * * The caller can only have one outstanding tstream_writev_send() * at a time otherwise the caller will get *perrno = EBUSY. * * @param[in] req The tevent request from tstream_writev_send(). * * @param[out] perrno The error number, set if an error occurred. * * @return The length of the stream (0 is never returned!), -1 on * error with perrno set to the actual errno. */ int tstream_writev_recv(struct tevent_req *req, int *perrno); /** * @brief Shutdown/close an abstracted socket. * * It returns a 'tevent_req' handle, where the caller can register a callback * with tevent_req_set_callback(). The callback is triggered when the specific * implementation (assumes it) has delivered the stream to the "wire". * * The callback is then supposed to get the result by calling * tdgram_sendto_recv() on the 'tevent_req'. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] stream The tstream context to work on. * * @return A 'tevent_req' handle, where the caller can register * a callback with tevent_req_set_callback(). NULL on * fatal error. */ struct tevent_req *tstream_disconnect_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tstream_context *stream); /** * @brief Get the result of a tstream_disconnect_send(). * * The caller can only have one outstanding tstream_writev_send() * at a time otherwise the caller will get *perrno = EBUSY. * * @param[in] req The tevent request from tstream_disconnect_send(). * * @param[out] perrno The error number, set if an error occurred. * * @return The length of the stream (0 is never returned!), -1 on * error with perrno set to the actual errno. */ int tstream_disconnect_recv(struct tevent_req *req, int *perrno); /** * @} */ /** * @defgroup tsocket_bsd tsocket_bsd - inet, inet6 and unix * @ingroup tsocket * * The main tsocket library comes with implentations for BSD style ipv4, ipv6 * and unix sockets. * * @{ */ /** * @brief Find out if the tsocket_address represents an ipv4 or ipv6 endpoint. * * @param[in] addr The tsocket_address pointer * * @param[in] fam The family can be can be "ipv4", "ipv6" or "ip". With * "ip" is autodetects "ipv4" or "ipv6" based on the * addr. * * @return true if addr represents an address of the given family, * otherwise false. */ bool tsocket_address_is_inet(const struct tsocket_address *addr, const char *fam); #if DOXYGEN /** * @brief Create a tsocket_address for ipv4 and ipv6 endpoint addresses. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] fam The family can be can be "ipv4", "ipv6" or "ip". With * "ip" is autodetects "ipv4" or "ipv6" based on the * addr. * * @param[in] addr A valid ip address string based on the selected family * (dns names are not allowed!). It's valid to pass NULL, * which gets mapped to "0.0.0.0" or "::". * * @param[in] port A valid port number. * * @param[out] _addr A tsocket_address pointer to store the information. * * @return 0 on success, -1 on error with errno set. */ int tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx, const char *fam, const char *addr, uint16_t port, struct tsocket_address **_addr); #else int _tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx, const char *fam, const char *addr, uint16_t port, struct tsocket_address **_addr, const char *location); #define tsocket_address_inet_from_strings(mem_ctx, fam, addr, port, _addr) \ _tsocket_address_inet_from_strings(mem_ctx, fam, addr, port, _addr, \ __location__) #endif /** * @brief Get the address of an 'inet' tsocket_address as a string. * * @param[in] addr The address to convert to a string. * * @param[in] mem_ctx The talloc memory context to use. * * @return A newly allocated string of the address, NULL on error * with errno set. * * @see tsocket_address_is_inet() */ char *tsocket_address_inet_addr_string(const struct tsocket_address *addr, TALLOC_CTX *mem_ctx); /** * @brief Get the port number as an integer from an 'inet' tsocket_address. * * @param[in] addr The tsocket address to use. * * @return The port number, 0 on error with errno set. */ uint16_t tsocket_address_inet_port(const struct tsocket_address *addr); /** * @brief Set the port number of an existing 'inet' tsocket_address. * * @param[in] addr The existing tsocket_address to use. * * @param[in] port The valid port number to set. * * @return 0 on success, -1 on error with errno set. */ int tsocket_address_inet_set_port(struct tsocket_address *addr, uint16_t port); /** * @brief Find out if the tsocket_address represents an unix domain endpoint. * * @param[in] addr The tsocket_address pointer * * @return true if addr represents an unix domain endpoint, * otherwise false. */ bool tsocket_address_is_unix(const struct tsocket_address *addr); #ifdef DOXYGEN /** * @brief Create a tsocket_address for a unix domain endpoint addresses. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] path The filesystem path, NULL will map "". * * @param[in] _addr The tsocket_address pointer to store the information. * * @return 0 on success, -1 on error with errno set. * * @see tsocket_address_is_unix() */ int tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx, const char *path, struct tsocket_address **_addr); #else int _tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx, const char *path, struct tsocket_address **_addr, const char *location); #define tsocket_address_unix_from_path(mem_ctx, path, _addr) \ _tsocket_address_unix_from_path(mem_ctx, path, _addr, \ __location__) #endif /** * @brief Get the address of an 'unix' tsocket_address. * * @param[in] addr A valid 'unix' tsocket_address. * * @param[in] mem_ctx The talloc memory context to use. * * @return The path of the unix domain socket, NULL on error or if * the tsocket_address doesn't represent an unix domain * endpoint path. */ char *tsocket_address_unix_path(const struct tsocket_address *addr, TALLOC_CTX *mem_ctx); #ifdef DOXYGEN /** * @brief Create a tdgram_context for a ipv4 or ipv6 UDP communication. * * @param[in] local An 'inet' tsocket_address for the local endpoint. * * @param[in] remote An 'inet' tsocket_address for the remote endpoint or * NULL (??? to create a listener?). * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] dgram The tdgram_context pointer to setup the udp * communication. The function will allocate the memory. * * @return 0 on success, -1 on error with errno set. */ int tdgram_inet_udp_socket(const struct tsocket_address *local, const struct tsocket_address *remote, TALLOC_CTX *mem_ctx, struct tdgram_context **dgram); #else int _tdgram_inet_udp_socket(const struct tsocket_address *local, const struct tsocket_address *remote, TALLOC_CTX *mem_ctx, struct tdgram_context **dgram, const char *location); #define tdgram_inet_udp_socket(local, remote, mem_ctx, dgram) \ _tdgram_inet_udp_socket(local, remote, mem_ctx, dgram, __location__) #endif #ifdef DOXYGEN /** * @brief Create a tdgram_context for unix domain datagram communication. * * @param[in] local An 'unix' tsocket_address for the local endpoint. * * @param[in] remote An 'unix' tsocket_address for the remote endpoint or * NULL (??? to create a listener?). * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] dgram The tdgram_context pointer to setup the udp * communication. The function will allocate the memory. * * @return 0 on success, -1 on error with errno set. */ int tdgram_unix_socket(const struct tsocket_address *local, const struct tsocket_address *remote, TALLOC_CTX *mem_ctx, struct tdgram_context **dgram); #else int _tdgram_unix_socket(const struct tsocket_address *local, const struct tsocket_address *remote, TALLOC_CTX *mem_ctx, struct tdgram_context **dgram, const char *location); #define tdgram_unix_socket(local, remote, mem_ctx, dgram) \ _tdgram_unix_socket(local, remote, mem_ctx, dgram, __location__) #endif /** * @brief Connect async to a TCP endpoint and create a tstream_context for the * stream based communication. * * Use this function to connenct asynchronously to a remote ipv4 or ipv6 TCP * endpoint and create a tstream_context for the stream based communication. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] local An 'inet' tsocket_address for the local endpoint. * * @param[in] remote An 'inet' tsocket_address for the remote endpoint. * * @return A 'tevent_req' handle, where the caller can register a * callback with tevent_req_set_callback(). NULL on a fatal * error. * * @see tstream_inet_tcp_connect_recv() */ struct tevent_req *tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, const struct tsocket_address *local, const struct tsocket_address *remote); #ifdef DOXYGEN /** * @brief Receive the result from a tstream_inet_tcp_connect_send(). * * @param[in] req The tevent request from tstream_inet_tcp_connect_send(). * * @param[out] perrno The error number, set if an error occurred. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] stream A tstream_context pointer to setup the tcp communication * on. This function will allocate the memory. * * @return 0 on success, -1 on error with perrno set. */ int tstream_inet_tcp_connect_recv(struct tevent_req *req, int *perrno, TALLOC_CTX *mem_ctx, struct tstream_context **stream); #else int _tstream_inet_tcp_connect_recv(struct tevent_req *req, int *perrno, TALLOC_CTX *mem_ctx, struct tstream_context **stream, const char *location); #define tstream_inet_tcp_connect_recv(req, perrno, mem_ctx, stream) \ _tstream_inet_tcp_connect_recv(req, perrno, mem_ctx, stream, \ __location__) #endif /** * @brief Connect async to a unix domain endpoint and create a tstream_context * for the stream based communication. * * Use this function to connenct asynchronously to a unix domainendpoint and * create a tstream_context for the stream based communication. * * The callback is triggered when a socket is connected and ready for IO or an * error happened. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] ev The tevent_context to run on. * * @param[in] local An 'unix' tsocket_address for the local endpoint. * * @param[in] remote An 'unix' tsocket_address for the remote endpoint. * * @return A 'tevent_req' handle, where the caller can register a * callback with tevent_req_set_callback(). NULL on a falal * error. * * @see tstream_unix_connect_recv() */ struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, const struct tsocket_address *local, const struct tsocket_address *remote); #ifdef DOXYGEN /** * @brief Receive the result from a tstream_unix_connect_send(). * * @param[in] req The tevent request from tstream_inet_tcp_connect_send(). * * @param[out] perrno The error number, set if an error occurred. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] stream The tstream context to work on. * * @return 0 on success, -1 on error with perrno set. */ int tstream_unix_connect_recv(struct tevent_req *req, int *perrno, TALLOC_CTX *mem_ctx, struct tstream_context **stream); #else int _tstream_unix_connect_recv(struct tevent_req *req, int *perrno, TALLOC_CTX *mem_ctx, struct tstream_context **stream, const char *location); #define tstream_unix_connect_recv(req, perrno, mem_ctx, stream) \ _tstream_unix_connect_recv(req, perrno, mem_ctx, stream, \ __location__) #endif #ifdef DOXYGEN /** * @brief Create two connected 'unix' tsocket_contexts for stream based * communication. * * @param[in] mem_ctx1 The talloc memory context to use for stream1. * * @param[in] stream1 The first stream to connect. * * @param[in] mem_ctx2 The talloc memory context to use for stream2. * * @param[in] stream2 The second stream to connect. * * @return 0 on success, -1 on error with errno set. */ int tstream_unix_socketpair(TALLOC_CTX *mem_ctx1, struct tstream_context **stream1, TALLOC_CTX *mem_ctx2, struct tstream_context **stream2); #else int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1, struct tstream_context **_stream1, TALLOC_CTX *mem_ctx2, struct tstream_context **_stream2, const char *location); #define tstream_unix_socketpair(mem_ctx1, stream1, mem_ctx2, stream2) \ _tstream_unix_socketpair(mem_ctx1, stream1, mem_ctx2, stream2, \ __location__) #endif struct sockaddr; #ifdef DOXYGEN /** * @brief Convert a tsocket address to a bsd socket address. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] sa The sockaddr structure to convert. * * @param[in] sa_socklen The lenth of the sockaddr sturucte. * * @param[out] addr The tsocket pointer to allocate and fill. * * @return 0 on success, -1 on error with errno set. */ int tsocket_address_bsd_from_sockaddr(TALLOC_CTX *mem_ctx, struct sockaddr *sa, size_t sa_socklen, struct tsocket_address **addr); #else int _tsocket_address_bsd_from_sockaddr(TALLOC_CTX *mem_ctx, struct sockaddr *sa, size_t sa_socklen, struct tsocket_address **_addr, const char *location); #define tsocket_address_bsd_from_sockaddr(mem_ctx, sa, sa_socklen, _addr) \ _tsocket_address_bsd_from_sockaddr(mem_ctx, sa, sa_socklen, _addr, \ __location__) #endif /** * @brief Fill a bsd sockaddr structure. * * @param[in] addr The tsocket address structure to use. * * @param[in] sa The bsd sockaddr structure to fill out. * * @param[in] sa_socklen The length of the bsd sockaddr structure to fill out. * * @return The actual size of the sockaddr structure, -1 on error * with errno set. The size could differ from sa_socklen. * * @code * ssize_t socklen; * struct sockaddr_storage ss; * * socklen = tsocket_address_bsd_sockaddr(taddr, * (struct sockaddr *) &ss, * sizeof(struct sockaddr_storage)); * if (socklen < 0) { * return -1; * } * @endcode */ ssize_t tsocket_address_bsd_sockaddr(const struct tsocket_address *addr, struct sockaddr *sa, size_t sa_socklen); #ifdef DOXYGEN /** * @brief Wrap an existing file descriptors into the tstream abstraction. * * You can use this function to wrap an existing file descriptors into the * tstream abstraction. After that you're not able to use this file descriptor * for anything else. The file descriptor will be closed when the stream gets * freed. If you still want to use the fd you have have to create a duplicate. * * @param[in] mem_ctx The talloc memory context to use. * * @param[in] fd The non blocking fd to use! * * @param[out] stream A pointer to store an allocated tstream_context. * * @return 0 on success, -1 on error. * * Example: * @code * fd2 = dup(fd); * rc = tstream_bsd_existing_socket(mem_ctx, fd2, &tstream); * if (rc < 0) { * stream_terminate_connection(conn, "named_pipe_accept: out of memory"); * return; * } * @endcode * * @warning This is an internal function. You should read the code to fully * understand it if you plan to use it. */ int tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx, int fd, struct tstream_context **stream); #else int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx, int fd, struct tstream_context **_stream, const char *location); #define tstream_bsd_existing_socket(mem_ctx, fd, stream) \ _tstream_bsd_existing_socket(mem_ctx, fd, stream, \ __location__) #endif /** * @} */ /** * @defgroup tsocket_helper Queue and PDU helpers * @ingroup tsocket * * In order to make the live easier for callers which want to implement a * function to receive a full PDU with a single async function pair, there're * some helper functions. * * There're some cases where the caller wants doesn't care about the order of * doing IO on the abstracted sockets. * * @{ */ /** * @brief Queue a dgram blob for sending through the socket. * * This function queues a blob for sending to destination through an existing * dgram socket. The async callback is triggered when the whole blob is * delivered to the underlying system socket. * * The caller needs to make sure that all non-scalar input parameters hang * around for the whole lifetime of the request. * * @param[in] mem_ctx The memory context for the result. * * @param[in] ev The event context the operation should work on. * * @param[in] dgram The tdgram_context to send the message buffer. * * @param[in] queue The existing dgram queue. * * @param[in] buf The message buffer to send. * * @param[in] len The message length. * * @param[in] dst The destination socket address. * * @return The async request handle. NULL on fatal error. * * @see tdgram_sendto_queue_recv() */ struct tevent_req *tdgram_sendto_queue_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tdgram_context *dgram, struct tevent_queue *queue, const uint8_t *buf, size_t len, struct tsocket_address *dst); /** * @brief Receive the result of the sent dgram blob. * * @param[in] req The tevent request from tdgram_sendto_queue_send(). * * @param[out] perrno The error set to the actual errno. * * @return The length of the datagram (0 is never returned!), -1 on * error with perrno set to the actual errno. */ ssize_t tdgram_sendto_queue_recv(struct tevent_req *req, int *perrno); typedef int (*tstream_readv_pdu_next_vector_t)(struct tstream_context *stream, void *private_data, TALLOC_CTX *mem_ctx, struct iovec **vector, size_t *count); struct tevent_req *tstream_readv_pdu_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tstream_context *stream, tstream_readv_pdu_next_vector_t next_vector_fn, void *next_vector_private); int tstream_readv_pdu_recv(struct tevent_req *req, int *perrno); /** * @brief Queue a read request for a PDU on the socket. * * This function queues a read request for a PDU on a stream socket. The async * callback is triggered when a full PDU has been read from the socket. * * The caller needs to make sure that all non-scalar input parameters hang * around for the whole lifetime of the request. * * @param[in] mem_ctx The memory context for the result * * @param[in] ev The tevent_context to run on * * @param[in] stream The stream to send data through * * @param[in] queue The existing send queue * * @param[in] next_vector_fn The next vector function * * @param[in] next_vector_private The private_data of the next vector function * * @return The async request handle. NULL on fatal error. * * @see tstream_readv_pdu_queue_recv() */ struct tevent_req *tstream_readv_pdu_queue_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tstream_context *stream, struct tevent_queue *queue, tstream_readv_pdu_next_vector_t next_vector_fn, void *next_vector_private); /** * @brief Receive the PDU blob read from the stream. * * @param[in] req The tevent request from tstream_readv_pdu_queue_send(). * * @param[out] perrno The error set to the actual errno. * * @return The number of bytes read on success, -1 on error with * perrno set to the actual errno. */ int tstream_readv_pdu_queue_recv(struct tevent_req *req, int *perrno); /** * @brief Queue an iovector for sending through the socket * * This function queues an iovector for sending to destination through an * existing stream socket. The async callback is triggered when the whole * vectror has been delivered to the underlying system socket. * * The caller needs to make sure that all non-scalar input parameters hang * around for the whole lifetime of the request. * * @param[in] mem_ctx The memory context for the result. * * @param[in] ev The tevent_context to run on. * * @param[in] stream The stream to send data through. * * @param[in] queue The existing send queue. * * @param[in] vector The iovec vector so write. * * @param[in] count The size of the vector. * * @return The async request handle. NULL on fatal error. */ struct tevent_req *tstream_writev_queue_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct tstream_context *stream, struct tevent_queue *queue, const struct iovec *vector, size_t count); /** * @brief Receive the result of the sent iovector. * * @param[in] req The tevent request from tstream_writev_queue_send(). * * @param[out] perrno The error set to the actual errno. * * @return The length of the iovector (0 is never returned!), -1 on * error with perrno set to the actual errno. */ int tstream_writev_queue_recv(struct tevent_req *req, int *perrno); /** * @} */ #endif /* _TSOCKET_H */