/* Copyright (c) 2007-2011 iMatix Corporation Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file This file is part of 0MQ. 0MQ 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. 0MQ 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 program. If not, see . */ #include "platform.hpp" #ifdef ZMQ_HAVE_OPENPGM #ifdef ZMQ_HAVE_WINDOWS #include "windows.hpp" #endif #ifdef ZMQ_HAVE_LINUX #include #endif #include #include #include #include "options.hpp" #include "pgm_socket.hpp" #include "config.hpp" #include "err.hpp" #include "uuid.hpp" #include "stdint.hpp" #ifndef MSG_ERRQUEUE #define MSG_ERRQUEUE 0x2000 #endif zmq::pgm_socket_t::pgm_socket_t (bool receiver_, const options_t &options_) : sock (NULL), options (options_), receiver (receiver_), pgm_msgv (NULL), pgm_msgv_len (0), nbytes_rec (0), nbytes_processed (0), pgm_msgv_processed (0) { } // Create, bind and connect PGM socket. // network_ of the form : // e.g. eth0;239.192.0.1:7500 // link-local;224.250.0.1,224.250.0.2;224.250.0.3:8000 // ;[fe80::1%en0]:7500 int zmq::pgm_socket_t::init (bool udp_encapsulation_, const char *network_) { // Can not open transport before destroying old one. zmq_assert (sock == NULL); // Parse port number, start from end for IPv6 const char *port_delim = strrchr (network_, ':'); if (!port_delim) { errno = EINVAL; return -1; } uint16_t port_number = atoi (port_delim + 1); char network [256]; if (port_delim - network_ >= (int) sizeof (network) - 1) { errno = EINVAL; return -1; } memset (network, '\0', sizeof (network)); memcpy (network, network_, port_delim - network_); zmq_assert (options.rate > 0); // Zero counter used in msgrecv. nbytes_rec = 0; nbytes_processed = 0; pgm_msgv_processed = 0; pgm_error_t *pgm_error = NULL; struct pgm_addrinfo_t hints, *res = NULL; sa_family_t sa_family; memset (&hints, 0, sizeof (hints)); hints.ai_family = AF_UNSPEC; if (!pgm_getaddrinfo (network, NULL, &res, &pgm_error)) { // Invalid parameters don't set pgm_error_t. zmq_assert (pgm_error != NULL); if (pgm_error->domain == PGM_ERROR_DOMAIN_IF && ( // NB: cannot catch EAI_BADFLAGS. pgm_error->code != PGM_ERROR_SERVICE && pgm_error->code != PGM_ERROR_SOCKTNOSUPPORT)) // User, host, or network configuration or transient error. goto err_abort; // Fatal OpenPGM internal error. zmq_assert (false); } zmq_assert (res != NULL); // Pick up detected IP family. sa_family = res->ai_send_addrs[0].gsr_group.ss_family; // Create IP/PGM or UDP/PGM socket. if (udp_encapsulation_) { if (!pgm_socket (&sock, sa_family, SOCK_SEQPACKET, IPPROTO_UDP, &pgm_error)) { // Invalid parameters don't set pgm_error_t. zmq_assert (pgm_error != NULL); if (pgm_error->domain == PGM_ERROR_DOMAIN_SOCKET && ( pgm_error->code != PGM_ERROR_BADF && pgm_error->code != PGM_ERROR_FAULT && pgm_error->code != PGM_ERROR_NOPROTOOPT && pgm_error->code != PGM_ERROR_FAILED)) // User, host, or network configuration or transient error. goto err_abort; // Fatal OpenPGM internal error. zmq_assert (false); } // All options are of data type int const int encapsulation_port = port_number; if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_UDP_ENCAP_UCAST_PORT, &encapsulation_port, sizeof (encapsulation_port))) goto err_abort; if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_UDP_ENCAP_MCAST_PORT, &encapsulation_port, sizeof (encapsulation_port))) goto err_abort; } else { if (!pgm_socket (&sock, sa_family, SOCK_SEQPACKET, IPPROTO_PGM, &pgm_error)) { // Invalid parameters don't set pgm_error_t. zmq_assert (pgm_error != NULL); if (pgm_error->domain == PGM_ERROR_DOMAIN_SOCKET && ( pgm_error->code != PGM_ERROR_BADF && pgm_error->code != PGM_ERROR_FAULT && pgm_error->code != PGM_ERROR_NOPROTOOPT && pgm_error->code != PGM_ERROR_FAILED)) // User, host, or network configuration or transient error. goto err_abort; // Fatal OpenPGM internal error. zmq_assert (false); } } { const int rcvbuf = (int) options.rcvbuf, sndbuf = (int) options.sndbuf, max_tpdu = (int) pgm_max_tpdu; if (rcvbuf) { if (!pgm_setsockopt (sock, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof (rcvbuf))) goto err_abort; } if (sndbuf) { if (!pgm_setsockopt (sock, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof (sndbuf))) goto err_abort; } // Set maximum transport protocol data unit size (TPDU). if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_MTU, &max_tpdu, sizeof (max_tpdu))) goto err_abort; } if (receiver) { const int recv_only = 1, rxw_max_tpdu = (int) pgm_max_tpdu, rxw_sqns = compute_sqns (rxw_max_tpdu), peer_expiry = pgm_secs (300), spmr_expiry = pgm_msecs (25), nak_bo_ivl = pgm_msecs (50), nak_rpt_ivl = pgm_msecs (200), nak_rdata_ivl = pgm_msecs (200), nak_data_retries = 50, nak_ncf_retries = 50; if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_RECV_ONLY, &recv_only, sizeof (recv_only)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_RXW_SQNS, &rxw_sqns, sizeof (rxw_sqns)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_PEER_EXPIRY, &peer_expiry, sizeof (peer_expiry)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_SPMR_EXPIRY, &spmr_expiry, sizeof (spmr_expiry)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_NAK_BO_IVL, &nak_bo_ivl, sizeof (nak_bo_ivl)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_NAK_RPT_IVL, &nak_rpt_ivl, sizeof (nak_rpt_ivl)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_NAK_RDATA_IVL, &nak_rdata_ivl, sizeof (nak_rdata_ivl)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_NAK_DATA_RETRIES, &nak_data_retries, sizeof (nak_data_retries)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_NAK_NCF_RETRIES, &nak_ncf_retries, sizeof (nak_ncf_retries))) goto err_abort; } else { const int send_only = 1, txw_max_tpdu = (int) pgm_max_tpdu, txw_sqns = compute_sqns (txw_max_tpdu), ambient_spm = pgm_secs (30), heartbeat_spm[] = { pgm_msecs (100), pgm_msecs (100), pgm_msecs (100), pgm_msecs (100), pgm_msecs (1300), pgm_secs (7), pgm_secs (16), pgm_secs (25), pgm_secs (30) }; if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_SEND_ONLY, &send_only, sizeof (send_only)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_TXW_SQNS, &txw_sqns, sizeof (txw_sqns)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_AMBIENT_SPM, &ambient_spm, sizeof (ambient_spm)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_HEARTBEAT_SPM, &heartbeat_spm, sizeof (heartbeat_spm))) goto err_abort; } // PGM transport GSI. struct pgm_sockaddr_t addr; memset (&addr, 0, sizeof(addr)); addr.sa_port = port_number; addr.sa_addr.sport = DEFAULT_DATA_SOURCE_PORT; if (options.identity.size () > 0) { // Create gsi from identity. if (!pgm_gsi_create_from_data (&addr.sa_addr.gsi, options.identity.data (), options.identity.size ())) goto err_abort; } else { // Generate random gsi. std::string gsi_base = uuid_t ().to_string (); if (!pgm_gsi_create_from_string (&addr.sa_addr.gsi, gsi_base.c_str (), -1)) goto err_abort; } // Bind a transport to the specified network devices. struct pgm_interface_req_t if_req; memset (&if_req, 0, sizeof(if_req)); if_req.ir_interface = res->ai_recv_addrs[0].gsr_interface; if_req.ir_scope_id = 0; if (AF_INET6 == sa_family) { struct sockaddr_in6 sa6; memcpy (&sa6, &res->ai_recv_addrs[0].gsr_group, sizeof (sa6)); if_req.ir_scope_id = sa6.sin6_scope_id; } if (!pgm_bind3 (sock, &addr, sizeof (addr), &if_req, sizeof (if_req), &if_req, sizeof (if_req), &pgm_error)) { // Invalid parameters don't set pgm_error_t. zmq_assert (pgm_error != NULL); if ((pgm_error->domain == PGM_ERROR_DOMAIN_SOCKET || pgm_error->domain == PGM_ERROR_DOMAIN_IF) && ( pgm_error->code != PGM_ERROR_INVAL && pgm_error->code != PGM_ERROR_BADF && pgm_error->code != PGM_ERROR_FAULT)) // User, host, or network configuration or transient error. goto err_abort; // Fatal OpenPGM internal error. zmq_assert (false); } // Join IP multicast groups. for (unsigned i = 0; i < res->ai_recv_addrs_len; i++) { if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_JOIN_GROUP, &res->ai_recv_addrs [i], sizeof (struct group_req))) goto err_abort; } if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_SEND_GROUP, &res->ai_send_addrs [0], sizeof (struct group_req))) goto err_abort; pgm_freeaddrinfo (res); res = NULL; // Set IP level parameters. { const int nonblocking = 1, multicast_loop = 0, multicast_hops = 16, // Expedited Forwarding PHB for network elements, no ECN. dscp = 0x2e << 2; if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_MULTICAST_LOOP, &multicast_loop, sizeof (multicast_loop)) || !pgm_setsockopt (sock, IPPROTO_PGM, PGM_MULTICAST_HOPS, &multicast_hops, sizeof (multicast_hops))) goto err_abort; if (AF_INET6 != sa_family && !pgm_setsockopt (sock, IPPROTO_PGM, PGM_TOS, &dscp, sizeof (dscp))) goto err_abort; if (!pgm_setsockopt (sock, IPPROTO_PGM, PGM_NOBLOCK, &nonblocking, sizeof (nonblocking))) goto err_abort; } // Connect PGM transport to start state machine. if (!pgm_connect (sock, &pgm_error)) { // Invalid parameters don't set pgm_error_t. zmq_assert (pgm_error != NULL); goto err_abort; } // For receiver transport preallocate pgm_msgv array. if (receiver) { zmq_assert (in_batch_size > 0); size_t max_tsdu_size = get_max_tsdu_size (); pgm_msgv_len = (int) in_batch_size / max_tsdu_size; if ((int) in_batch_size % max_tsdu_size) pgm_msgv_len++; zmq_assert (pgm_msgv_len); pgm_msgv = (pgm_msgv_t*) malloc (sizeof (pgm_msgv_t) * pgm_msgv_len); alloc_assert (pgm_msgv); } return 0; err_abort: if (sock != NULL) { pgm_close (sock, FALSE); sock = NULL; } if (res != NULL) { pgm_freeaddrinfo (res); res = NULL; } if (pgm_error != NULL) { pgm_error_free (pgm_error); pgm_error = NULL; } errno = EINVAL; return -1; } zmq::pgm_socket_t::~pgm_socket_t () { if (pgm_msgv) free (pgm_msgv); if (sock) pgm_close (sock, TRUE); } // Get receiver fds. receive_fd_ is signaled for incoming packets, // waiting_pipe_fd_ is signaled for state driven events and data. void zmq::pgm_socket_t::get_receiver_fds (int *receive_fd_, int *waiting_pipe_fd_) { socklen_t socklen; bool rc; zmq_assert (receive_fd_); zmq_assert (waiting_pipe_fd_); socklen = sizeof (*receive_fd_); rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_RECV_SOCK, receive_fd_, &socklen); zmq_assert (rc); zmq_assert (socklen == sizeof (*receive_fd_)); socklen = sizeof (*waiting_pipe_fd_); rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_PENDING_SOCK, waiting_pipe_fd_, &socklen); zmq_assert (rc); zmq_assert (socklen == sizeof (*waiting_pipe_fd_)); } // Get fds and store them into user allocated memory. // send_fd is for non-blocking send wire notifications. // receive_fd_ is for incoming back-channel protocol packets. // rdata_notify_fd_ is raised for waiting repair transmissions. // pending_notify_fd_ is for state driven events. void zmq::pgm_socket_t::get_sender_fds (int *send_fd_, int *receive_fd_, int *rdata_notify_fd_, int *pending_notify_fd_) { socklen_t socklen; bool rc; zmq_assert (send_fd_); zmq_assert (receive_fd_); zmq_assert (rdata_notify_fd_); zmq_assert (pending_notify_fd_); socklen = sizeof (*send_fd_); rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_SEND_SOCK, send_fd_, &socklen); zmq_assert (rc); zmq_assert (socklen == sizeof (*receive_fd_)); socklen = sizeof (*receive_fd_); rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_RECV_SOCK, receive_fd_, &socklen); zmq_assert (rc); zmq_assert (socklen == sizeof (*receive_fd_)); socklen = sizeof (*rdata_notify_fd_); rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_REPAIR_SOCK, rdata_notify_fd_, &socklen); zmq_assert (rc); zmq_assert (socklen == sizeof (*rdata_notify_fd_)); socklen = sizeof (*pending_notify_fd_); rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_PENDING_SOCK, pending_notify_fd_, &socklen); zmq_assert (rc); zmq_assert (socklen == sizeof (*pending_notify_fd_)); } // Send one APDU, transmit window owned memory. // data_len_ must be less than one TPDU. size_t zmq::pgm_socket_t::send (unsigned char *data_, size_t data_len_) { size_t nbytes = 0; const int status = pgm_send (sock, data_, data_len_, &nbytes); // We have to write all data as one packet. if (nbytes > 0) { zmq_assert (status == PGM_IO_STATUS_NORMAL); zmq_assert ((ssize_t) nbytes == (ssize_t) data_len_); } else { zmq_assert (status == PGM_IO_STATUS_RATE_LIMITED || status == PGM_IO_STATUS_WOULD_BLOCK); if (status == PGM_IO_STATUS_RATE_LIMITED) errno = ENOMEM; else errno = EBUSY; } // Save return value. last_tx_status = status; return nbytes; } long zmq::pgm_socket_t::get_rx_timeout () { if (last_rx_status != PGM_IO_STATUS_RATE_LIMITED && last_rx_status != PGM_IO_STATUS_TIMER_PENDING) return -1; struct timeval tv; socklen_t optlen = sizeof (tv); const bool rc = pgm_getsockopt (sock, IPPROTO_PGM, last_rx_status == PGM_IO_STATUS_RATE_LIMITED ? PGM_RATE_REMAIN : PGM_TIME_REMAIN, &tv, &optlen); zmq_assert (rc); const long timeout = (tv.tv_sec * 1000) + (tv.tv_usec / 1000); return timeout; } long zmq::pgm_socket_t::get_tx_timeout () { if (last_tx_status != PGM_IO_STATUS_RATE_LIMITED) return -1; struct timeval tv; socklen_t optlen = sizeof (tv); const bool rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_RATE_REMAIN, &tv, &optlen); zmq_assert (rc); const long timeout = (tv.tv_sec * 1000) + (tv.tv_usec / 1000); return timeout; } // Return max TSDU size without fragmentation from current PGM transport. size_t zmq::pgm_socket_t::get_max_tsdu_size () { int max_tsdu = 0; socklen_t optlen = sizeof (max_tsdu); bool rc = pgm_getsockopt (sock, IPPROTO_PGM, PGM_MSS, &max_tsdu, &optlen); zmq_assert (rc); zmq_assert (optlen == sizeof (max_tsdu)); return (size_t) max_tsdu; } // pgm_recvmsgv is called to fill the pgm_msgv array up to pgm_msgv_len. // In subsequent calls data from pgm_msgv structure are returned. ssize_t zmq::pgm_socket_t::receive (void **raw_data_, const pgm_tsi_t **tsi_) { size_t raw_data_len = 0; // We just sent all data from pgm_transport_recvmsgv up // and have to return 0 that another engine in this thread is scheduled. if (nbytes_rec == nbytes_processed && nbytes_rec > 0) { // Reset all the counters. nbytes_rec = 0; nbytes_processed = 0; pgm_msgv_processed = 0; errno = EAGAIN; return 0; } // If we have are going first time or if we have processed all pgm_msgv_t // structure previously read from the pgm socket. if (nbytes_rec == nbytes_processed) { // Check program flow. zmq_assert (pgm_msgv_processed == 0); zmq_assert (nbytes_processed == 0); zmq_assert (nbytes_rec == 0); // Receive a vector of Application Protocol Domain Unit's (APDUs) // from the transport. pgm_error_t *pgm_error = NULL; const int status = pgm_recvmsgv (sock, pgm_msgv, pgm_msgv_len, MSG_ERRQUEUE, &nbytes_rec, &pgm_error); // Invalid parameters. zmq_assert (status != PGM_IO_STATUS_ERROR); last_rx_status = status; // In a case when no ODATA/RDATA fired POLLIN event (SPM...) // pgm_recvmsg returns PGM_IO_STATUS_TIMER_PENDING. if (status == PGM_IO_STATUS_TIMER_PENDING) { zmq_assert (nbytes_rec == 0); // In case if no RDATA/ODATA caused POLLIN 0 is // returned. nbytes_rec = 0; errno = EBUSY; return 0; } // Send SPMR, NAK, ACK is rate limited. if (status == PGM_IO_STATUS_RATE_LIMITED) { zmq_assert (nbytes_rec == 0); // In case if no RDATA/ODATA caused POLLIN 0 is returned. nbytes_rec = 0; errno = ENOMEM; return 0; } // No peers and hence no incoming packets. if (status == PGM_IO_STATUS_WOULD_BLOCK) { zmq_assert (nbytes_rec == 0); // In case if no RDATA/ODATA caused POLLIN 0 is returned. nbytes_rec = 0; errno = EAGAIN; return 0; } // Data loss. if (status == PGM_IO_STATUS_RESET) { struct pgm_sk_buff_t* skb = pgm_msgv [0].msgv_skb [0]; // Save lost data TSI. *tsi_ = &skb->tsi; nbytes_rec = 0; // In case of dala loss -1 is returned. errno = EINVAL; pgm_free_skb (skb); return -1; } zmq_assert (status == PGM_IO_STATUS_NORMAL); } else { zmq_assert (pgm_msgv_processed <= pgm_msgv_len); } // Zero byte payloads are valid in PGM, but not 0MQ protocol. zmq_assert (nbytes_rec > 0); // Only one APDU per pgm_msgv_t structure is allowed. zmq_assert (pgm_msgv [pgm_msgv_processed].msgv_len == 1); struct pgm_sk_buff_t* skb = pgm_msgv [pgm_msgv_processed].msgv_skb [0]; // Take pointers from pgm_msgv_t structure. *raw_data_ = skb->data; raw_data_len = skb->len; // Save current TSI. *tsi_ = &skb->tsi; // Move the the next pgm_msgv_t structure. pgm_msgv_processed++; zmq_assert (pgm_msgv_processed <= pgm_msgv_len); nbytes_processed +=raw_data_len; return raw_data_len; } void zmq::pgm_socket_t::process_upstream () { pgm_msgv_t dummy_msg; size_t dummy_bytes = 0; pgm_error_t *pgm_error = NULL; const int status = pgm_recvmsgv (sock, &dummy_msg, 1, MSG_ERRQUEUE, &dummy_bytes, &pgm_error); // Invalid parameters. zmq_assert (status != PGM_IO_STATUS_ERROR); // No data should be returned. zmq_assert (dummy_bytes == 0 && (status == PGM_IO_STATUS_TIMER_PENDING || status == PGM_IO_STATUS_RATE_LIMITED || status == PGM_IO_STATUS_WOULD_BLOCK)); last_rx_status = status; if (status == PGM_IO_STATUS_TIMER_PENDING) errno = EBUSY; else if (status == PGM_IO_STATUS_RATE_LIMITED) errno = ENOMEM; else errno = EAGAIN; } int zmq::pgm_socket_t::compute_sqns (int tpdu_) { // Convert rate into B/ms. uint64_t rate = ((uint64_t) options.rate) / 8; // Compute the size of the buffer in bytes. uint64_t size = options.recovery_ivl * rate; // Translate the size into number of packets. uint64_t sqns = size / tpdu_; // Buffer should be able to hold at least one packet. if (sqns == 0) sqns = 1; return sqns; } #endif