diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/ip.cpp | 369 | ||||
| -rw-r--r-- | src/ip.hpp | 32 | ||||
| -rw-r--r-- | src/tcp_address.cpp | 422 | ||||
| -rw-r--r-- | src/tcp_address.hpp | 68 | ||||
| -rw-r--r-- | src/tcp_connecter.cpp | 12 | ||||
| -rw-r--r-- | src/tcp_connecter.hpp | 7 | ||||
| -rw-r--r-- | src/tcp_listener.cpp | 19 | ||||
| -rw-r--r-- | src/tcp_listener.hpp | 7 | ||||
| -rw-r--r-- | src/vtcp_connecter.cpp | 10 | ||||
| -rw-r--r-- | src/vtcp_connecter.hpp | 7 |
11 files changed, 522 insertions, 433 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index db6bb5e..7992ab8 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -63,6 +63,7 @@ libzmq_la_SOURCES = \ stdint.hpp \ stream_engine.hpp \ sub.hpp \ + tcp_address.hpp \ tcp_connecter.hpp \ tcp_listener.hpp \ thread.hpp \ @@ -121,6 +122,7 @@ libzmq_la_SOURCES = \ socket_base.cpp \ stream_engine.cpp \ sub.cpp \ + tcp_address.cpp \ tcp_connecter.cpp \ tcp_listener.cpp \ thread.cpp \ @@ -18,380 +18,23 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#include <stdlib.h> -#include <string.h> -#include <stdlib.h> -#include <string> - #include "ip.hpp" #include "err.hpp" #include "platform.hpp" -#include "stdint.hpp" -#if !defined ZMQ_HAVE_WINDOWS +#if defined ZMQ_HAVE_WINDOWS +#include "windows.hpp" +#else #include <fcntl.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/tcp.h> #endif #if defined ZMQ_HAVE_OPENVMS #include <ioctl.h> #endif -#if defined ZMQ_HAVE_SOLARIS - -#include <sys/sockio.h> -#include <net/if.h> -#include <unistd.h> - -// On Solaris platform, network interface name can be queried by ioctl. -static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, - bool ipv4only_) -{ - // TODO: Unused parameter, IPv6 support not implemented for Solaris. - (void) ipv4only_; - - // Create a socket. - int fd = socket (AF_INET, SOCK_DGRAM, 0); - zmq_assert (fd != -1); - - // Retrieve number of interfaces. - lifnum ifn; - ifn.lifn_family = AF_INET; - ifn.lifn_flags = 0; - int rc = ioctl (fd, SIOCGLIFNUM, (char*) &ifn); - zmq_assert (rc != -1); - - // Allocate memory to get interface names. - size_t ifr_size = sizeof (struct lifreq) * ifn.lifn_count; - char *ifr = (char*) malloc (ifr_size); - alloc_assert (ifr); - - // Retrieve interface names. - lifconf ifc; - ifc.lifc_family = AF_INET; - ifc.lifc_flags = 0; - ifc.lifc_len = ifr_size; - ifc.lifc_buf = ifr; - rc = ioctl (fd, SIOCGLIFCONF, (char*) &ifc); - zmq_assert (rc != -1); - - // Find the interface with the specified name and AF_INET family. - bool found = false; - lifreq *ifrp = ifc.lifc_req; - for (int n = 0; n < (int) (ifc.lifc_len / sizeof (lifreq)); - n ++, ifrp ++) { - if (!strcmp (interface_, ifrp->lifr_name)) { - rc = ioctl (fd, SIOCGLIFADDR, (char*) ifrp); - zmq_assert (rc != -1); - if (ifrp->lifr_addr.ss_family == AF_INET) { - *(sockaddr_in*) addr_ = *(sockaddr_in*) &ifrp->lifr_addr; - found = true; - break; - } - } - } - - // Clean-up. - free (ifr); - close (fd); - - if (!found) { - errno = ENODEV; - return -1; - } - - return 0; -} - -#elif defined ZMQ_HAVE_AIX || ZMQ_HAVE_HPUX || ZMQ_HAVE_ANDROID - -#include <sys/types.h> -#include <unistd.h> -#include <sys/ioctl.h> -#include <net/if.h> - -static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, - bool ipv4only_) -{ - // TODO: Unused parameter, IPv6 support not implemented for AIX or HP/UX. - (void) ipv4only_; - - // Create a socket. - int sd = socket (AF_INET, SOCK_DGRAM, 0); - zmq_assert (sd != -1); - - struct ifreq ifr; - - // Copy interface name for ioctl get. - strncpy (ifr.ifr_name, interface_, sizeof (ifr.ifr_name)); - - // Fetch interface address. - int rc = ioctl (sd, SIOCGIFADDR, (caddr_t) &ifr, sizeof (struct ifreq)); - - // Clean up. - close (sd); - - if (rc == -1) { - errno = ENODEV; - return -1; - } - - memcpy (&((sockaddr_in*) addr_)->sin_addr, - &((sockaddr_in*) &ifr.ifr_addr)->sin_addr, sizeof (in_addr)); - - return 0; -} - -#elif ((defined ZMQ_HAVE_LINUX || defined ZMQ_HAVE_FREEBSD ||\ - defined ZMQ_HAVE_OSX || defined ZMQ_HAVE_OPENBSD ||\ - defined ZMQ_HAVE_QNXNTO || defined ZMQ_HAVE_NETBSD)\ - && defined ZMQ_HAVE_IFADDRS) - -#include <ifaddrs.h> - -// On these platforms, network interface name can be queried -// using getifaddrs function. -static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, - bool ipv4only_) -{ - // Get the addresses. - ifaddrs* ifa = NULL; - int rc = getifaddrs (&ifa); - zmq_assert (rc == 0); - zmq_assert (ifa != NULL); - - // Find the corresponding network interface. - bool found = false; - for (ifaddrs *ifp = ifa; ifp != NULL ;ifp = ifp->ifa_next) - { - if (ifp->ifa_addr == NULL) - continue; - - int family = ifp->ifa_addr->sa_family; - - if ((family == AF_INET - || (!ipv4only_ && family == AF_INET6)) - && !strcmp (interface_, ifp->ifa_name)) - { - memcpy (addr_, ifp->ifa_addr, - (family == AF_INET) ? sizeof (struct sockaddr_in) - : sizeof (struct sockaddr_in6)); - found = true; - break; - } - } - - // Clean-up; - freeifaddrs (ifa); - - if (!found) { - errno = ENODEV; - return -1; - } - - return 0; -} - -#else - -// On other platforms we assume there are no sane interface names. -// This is true especially of Windows. -static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, - bool ipv4only_) -{ - // All unused parameters. - (void) addr_; - (void) interface_; - (void) ipv4only_; - - errno = ENODEV; - return -1; -} - -#endif - -int zmq::resolve_ip_interface (sockaddr_storage* addr_, socklen_t *addr_len_, - char const *interface_, bool ipv4only_) -{ - // Find the ':' at end that separates NIC name from service. - const char *delimiter = strrchr (interface_, ':'); - if (!delimiter) { - errno = EINVAL; - return -1; - } - - // Separate the name/port. - std::string iface (interface_, delimiter - interface_); - std::string service (delimiter + 1); - - // 0 is not a valid port. - uint16_t sin_port = htons ((uint16_t) atoi (service.c_str())); - if (!sin_port) { - errno = EINVAL; - return -1; - } - - // Initialize the output parameter. - memset (addr_, 0, sizeof (*addr_)); - - // Initialize temporary output pointers with storage address. - sockaddr_storage ss; - sockaddr *out_addr = (sockaddr *) &ss; - socklen_t out_addrlen; - - // Initialise IP-format family/port and populate temporary output pointers - // with the address. - if (ipv4only_) { - sockaddr_in ip4_addr; - memset (&ip4_addr, 0, sizeof (ip4_addr)); - ip4_addr.sin_family = AF_INET; - ip4_addr.sin_port = sin_port; - ip4_addr.sin_addr.s_addr = htonl (INADDR_ANY); - out_addrlen = (socklen_t) sizeof (ip4_addr); - memcpy (out_addr, &ip4_addr, out_addrlen); - } else { - sockaddr_in6 ip6_addr; - memset (&ip6_addr, 0, sizeof (ip6_addr)); - ip6_addr.sin6_family = AF_INET6; - ip6_addr.sin6_port = sin_port; - memcpy (&ip6_addr.sin6_addr, &in6addr_any, sizeof (in6addr_any)); - out_addrlen = (socklen_t) sizeof (ip6_addr); - memcpy (out_addr, &ip6_addr, out_addrlen); - } - - // * resolves to INADDR_ANY or in6addr_any. - if (iface.compare("*") == 0) { - zmq_assert (out_addrlen <= (socklen_t) sizeof (*addr_)); - memcpy (addr_, out_addr, out_addrlen); - *addr_len_ = out_addrlen; - return 0; - } - - // Try to resolve the string as a NIC name. - int rc = resolve_nic_name (out_addr, iface.c_str(), ipv4only_); - if (rc != 0 && errno != ENODEV) - return rc; - if (rc == 0) { - zmq_assert (out_addrlen <= (socklen_t) sizeof (*addr_)); - memcpy (addr_, out_addr, out_addrlen); - *addr_len_ = out_addrlen; - return 0; - } - - // There's no such interface name. Assume literal address. -#if defined ZMQ_HAVE_OPENVMS && defined __ia64 - __addrinfo64 *res = NULL; - __addrinfo64 req; -#else - addrinfo *res = NULL; - addrinfo req; -#endif - memset (&req, 0, sizeof (req)); - - // Choose IPv4 or IPv6 protocol family. Note that IPv6 allows for - // IPv4-in-IPv6 addresses. - req.ai_family = ipv4only_ ? AF_INET : AF_INET6; - - // Arbitrary, not used in the output, but avoids duplicate results. - req.ai_socktype = SOCK_STREAM; - - // Restrict hostname/service to literals to avoid any DNS lookups or - // service-name irregularity due to indeterminate socktype. - req.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV; - -#ifndef ZMQ_HAVE_WINDOWS - // Windows by default maps IPv4 addresses into IPv6. In this API we only - // require IPv4-mapped addresses when no native IPv6 interfaces are - // available (~AI_ALL). This saves an additional DNS roundtrip for IPv4 - // addresses. - if (req.ai_family == AF_INET6) - req.ai_flags |= AI_V4MAPPED; -#endif - - // Resolve the literal address. Some of the error info is lost in case - // of error, however, there's no way to report EAI errors via errno. - rc = getaddrinfo (iface.c_str(), service.c_str(), &req, &res); - if (rc) { - errno = ENODEV; - return -1; - } - - // Use the first result. - zmq_assert ((size_t) (res->ai_addrlen) <= sizeof (*addr_)); - memcpy (addr_, res->ai_addr, res->ai_addrlen); - *addr_len_ = (socklen_t) res->ai_addrlen; - - // Cleanup getaddrinfo after copying the possibly referenced result. - if (res) - freeaddrinfo (res); - - return 0; -} - -int zmq::resolve_ip_hostname (sockaddr_storage *addr_, socklen_t *addr_len_, - const char *hostname_, bool ipv4only_) -{ - // Find the ':' that separates hostname name from service. - const char *delimiter = strrchr (hostname_, ':'); - if (!delimiter) { - errno = EINVAL; - return -1; - } - - // Separate the hostname and service. - std::string hostname (hostname_, delimiter - hostname_); - std::string service (delimiter + 1); - - // Set up the query. - addrinfo req; - memset (&req, 0, sizeof (req)); - - // Choose IPv4 or IPv6 protocol family. Note that IPv6 allows for - // IPv4-in-IPv6 addresses. - req.ai_family = ipv4only_ ? AF_INET : AF_INET6; - - // Need to choose one to avoid duplicate results from getaddrinfo() - this - // doesn't really matter, since it's not included in the addr-output. - req.ai_socktype = SOCK_STREAM; - - // Avoid named services due to unclear socktype. - req.ai_flags = AI_NUMERICSERV; - -#ifndef ZMQ_HAVE_WINDOWS - // Windows by default maps IPv4 addresses into IPv6. In this API we only - // require IPv4-mapped addresses when no native IPv6 interfaces are - // available. This saves an additional DNS roundtrip for IPv4 addresses. - if (req.ai_family == AF_INET6) - req.ai_flags |= AI_V4MAPPED; -#endif - - // Resolve host name. Some of the error info is lost in case of error, - // however, there's no way to report EAI errors via errno. - addrinfo *res; - int rc = getaddrinfo (hostname.c_str (), service.c_str (), &req, &res); - if (rc) { - - switch (rc) { - case EAI_MEMORY: - errno = ENOMEM; - break; - default: - errno = EINVAL; - break; - } - - return -1; - } - - // Copy first result to output addr with hostname and service. - zmq_assert ((size_t) (res->ai_addrlen) <= sizeof (*addr_)); - memcpy (addr_, res->ai_addr, res->ai_addrlen); - *addr_len_ = (socklen_t) res->ai_addrlen; - - freeaddrinfo (res); - - return 0; -} - void zmq::tune_tcp_socket (fd_t s_) { // Disable Nagle's algorithm. We are doing data batching on 0MQ level, @@ -21,43 +21,11 @@ #ifndef __ZMQ_IP_HPP_INCLUDED__ #define __ZMQ_IP_HPP_INCLUDED__ -#include "platform.hpp" #include "fd.hpp" -#ifdef ZMQ_HAVE_WINDOWS -#include "windows.hpp" -#else -#include <sys/types.h> -#include <sys/socket.h> -#include <arpa/inet.h> -#include <netinet/in.h> -#include <netinet/tcp.h> -#include <netdb.h> -#endif - -// Some platforms (notably Darwin/OSX and NetBSD) do not define all AI_ -// flags for getaddrinfo(). This can be worked around safely by defining -// these to 0. -#ifndef AI_ADDRCONFIG -#define AI_ADDRCONFIG 0 -#endif -#ifndef AI_NUMERICSERV -#define AI_NUMERICSERV 0 -#endif - namespace zmq { - // Resolves network interface name in <nic-name>:<port> format. Symbol "*" - // (asterisk) resolves to INADDR_ANY (all network interfaces). - int resolve_ip_interface (sockaddr_storage *addr_, socklen_t *addr_len_, - char const *interface_, bool ipv4only_); - - // This function resolves a string in <hostname>:<port-number> format. - // Hostname can be either the name of the host or its IP address. - int resolve_ip_hostname (sockaddr_storage *addr_, socklen_t *addr_len_, - const char *hostname_, bool ipv4only_); - // Tunes the supplied TCP socket for the best latency. void tune_tcp_socket (fd_t s_); diff --git a/src/tcp_address.cpp b/src/tcp_address.cpp new file mode 100644 index 0000000..358c847 --- /dev/null +++ b/src/tcp_address.cpp @@ -0,0 +1,422 @@ +/* + 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 <http://www.gnu.org/licenses/>. +*/ + +#include <string.h> +#include <string> + +#include "tcp_address.hpp" +#include "platform.hpp" +#include "err.hpp" + +#ifdef ZMQ_HAVE_WINDOWS +#include "windows.hpp" +#else +#include <sys/types.h> +#include <sys/socket.h> +#include <arpa/inet.h> +#include <netinet/in.h> +#include <netinet/tcp.h> +#include <netdb.h> +#endif + +// Some platforms (notably Darwin/OSX and NetBSD) do not define all AI_ +// flags for getaddrinfo(). This can be worked around safely by defining +// these to 0. +#ifndef AI_ADDRCONFIG +#define AI_ADDRCONFIG 0 +#endif + +#if defined ZMQ_HAVE_SOLARIS + +#include <sys/sockio.h> +#include <net/if.h> +#include <unistd.h> + +// On Solaris platform, network interface name can be queried by ioctl. +static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, + bool ipv4only_) +{ + // TODO: Unused parameter, IPv6 support not implemented for Solaris. + (void) ipv4only_; + + // Create a socket. + int fd = socket (AF_INET, SOCK_DGRAM, 0); + zmq_assert (fd != -1); + + // Retrieve number of interfaces. + lifnum ifn; + ifn.lifn_family = AF_INET; + ifn.lifn_flags = 0; + int rc = ioctl (fd, SIOCGLIFNUM, (char*) &ifn); + zmq_assert (rc != -1); + + // Allocate memory to get interface names. + size_t ifr_size = sizeof (struct lifreq) * ifn.lifn_count; + char *ifr = (char*) malloc (ifr_size); + alloc_assert (ifr); + + // Retrieve interface names. + lifconf ifc; + ifc.lifc_family = AF_INET; + ifc.lifc_flags = 0; + ifc.lifc_len = ifr_size; + ifc.lifc_buf = ifr; + rc = ioctl (fd, SIOCGLIFCONF, (char*) &ifc); + zmq_assert (rc != -1); + + // Find the interface with the specified name and AF_INET family. + bool found = false; + lifreq *ifrp = ifc.lifc_req; + for (int n = 0; n < (int) (ifc.lifc_len / sizeof (lifreq)); + n ++, ifrp ++) { + if (!strcmp (interface_, ifrp->lifr_name)) { + rc = ioctl (fd, SIOCGLIFADDR, (char*) ifrp); + zmq_assert (rc != -1); + if (ifrp->lifr_addr.ss_family == AF_INET) { + *(sockaddr_in*) addr_ = *(sockaddr_in*) &ifrp->lifr_addr; + found = true; + break; + } + } + } + + // Clean-up. + free (ifr); + close (fd); + + if (!found) { + errno = ENODEV; + return -1; + } + + return 0; +} + +#elif defined ZMQ_HAVE_AIX || ZMQ_HAVE_HPUX || ZMQ_HAVE_ANDROID + +#include <sys/types.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <net/if.h> + +static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, + bool ipv4only_) +{ + // TODO: Unused parameter, IPv6 support not implemented for AIX or HP/UX. + (void) ipv4only_; + + // Create a socket. + int sd = socket (AF_INET, SOCK_DGRAM, 0); + zmq_assert (sd != -1); + + struct ifreq ifr; + + // Copy interface name for ioctl get. + strncpy (ifr.ifr_name, interface_, sizeof (ifr.ifr_name)); + + // Fetch interface address. + int rc = ioctl (sd, SIOCGIFADDR, (caddr_t) &ifr, sizeof (struct ifreq)); + + // Clean up. + close (sd); + + if (rc == -1) { + errno = ENODEV; + return -1; + } + + memcpy (&((sockaddr_in*) addr_)->sin_addr, + &((sockaddr_in*) &ifr.ifr_addr)->sin_addr, sizeof (in_addr)); + + return 0; +} + +#elif ((defined ZMQ_HAVE_LINUX || defined ZMQ_HAVE_FREEBSD ||\ + defined ZMQ_HAVE_OSX || defined ZMQ_HAVE_OPENBSD ||\ + defined ZMQ_HAVE_QNXNTO || defined ZMQ_HAVE_NETBSD)\ + && defined ZMQ_HAVE_IFADDRS) + +#include <ifaddrs.h> + +// On these platforms, network interface name can be queried +// using getifaddrs function. +static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, + bool ipv4only_) +{ + // Get the addresses. + ifaddrs* ifa = NULL; + int rc = getifaddrs (&ifa); + zmq_assert (rc == 0); + zmq_assert (ifa != NULL); + + // Find the corresponding network interface. + bool found = false; + for (ifaddrs *ifp = ifa; ifp != NULL ;ifp = ifp->ifa_next) + { + if (ifp->ifa_addr == NULL) + continue; + + int family = ifp->ifa_addr->sa_family; + + if ((family == AF_INET + || (!ipv4only_ && family == AF_INET6)) + && !strcmp (interface_, ifp->ifa_name)) + { + memcpy (addr_, ifp->ifa_addr, + (family == AF_INET) ? sizeof (struct sockaddr_in) + : sizeof (struct sockaddr_in6)); + found = true; + break; + } + } + + // Clean-up; + freeifaddrs (ifa); + + if (!found) { + errno = ENODEV; + return -1; + } + + return 0; +} + +#else + +// On other platforms we assume there are no sane interface names. +// This is true especially of Windows. +static int resolve_nic_name (struct sockaddr* addr_, char const *interface_, + bool ipv4only_) +{ + // All unused parameters. + (void) addr_; + (void) interface_; + (void) ipv4only_; + + errno = ENODEV; + return -1; +} + +#endif + +int zmq::tcp_address_t::resolve_interface (char const *interface_, + bool ipv4only_) +{ + // Initialize temporary output pointers with storage address. + sockaddr_storage ss; + sockaddr *out_addr = (sockaddr *) &ss; + socklen_t out_addrlen; + + // Initialise IP-format family/port and populate temporary output pointers + // with the address. + if (ipv4only_) { + sockaddr_in ip4_addr; + memset (&ip4_addr, 0, sizeof (ip4_addr)); + ip4_addr.sin_family = AF_INET; + ip4_addr.sin_addr.s_addr = htonl (INADDR_ANY); + out_addrlen = (socklen_t) sizeof (ip4_addr); + memcpy (out_addr, &ip4_addr, out_addrlen); + } else { + sockaddr_in6 ip6_addr; + memset (&ip6_addr, 0, sizeof (ip6_addr)); + ip6_addr.sin6_family = AF_INET6; + memcpy (&ip6_addr.sin6_addr, &in6addr_any, sizeof (in6addr_any)); + out_addrlen = (socklen_t) sizeof (ip6_addr); + memcpy (out_addr, &ip6_addr, out_addrlen); + } + + // * resolves to INADDR_ANY or in6addr_any. + if (strcmp (interface_, "*") == 0) { + zmq_assert (out_addrlen <= (socklen_t) sizeof (address)); + memcpy (&address, out_addr, out_addrlen); + return 0; + } + + // Try to resolve the string as a NIC name. + int rc = resolve_nic_name (out_addr, interface_, ipv4only_); + if (rc != 0 && errno != ENODEV) + return rc; + if (rc == 0) { + zmq_assert (out_addrlen <= (socklen_t) sizeof (address)); + memcpy (&address, out_addr, out_addrlen); + return 0; + } + + // There's no such interface name. Assume literal address. +#if defined ZMQ_HAVE_OPENVMS && defined __ia64 + __addrinfo64 *res = NULL; + __addrinfo64 req; +#else + addrinfo *res = NULL; + addrinfo req; +#endif + memset (&req, 0, sizeof (req)); + + // Choose IPv4 or IPv6 protocol family. Note that IPv6 allows for + // IPv4-in-IPv6 addresses. + req.ai_family = ipv4only_ ? AF_INET : AF_INET6; + + // Arbitrary, not used in the output, but avoids duplicate results. + req.ai_socktype = SOCK_STREAM; + + // Restrict hostname/service to literals to avoid any DNS lookups or + // service-name irregularity due to indeterminate socktype. + req.ai_flags = AI_PASSIVE | AI_NUMERICHOST; + +#ifndef ZMQ_HAVE_WINDOWS + // Windows by default maps IPv4 addresses into IPv6. In this API we only + // require IPv4-mapped addresses when no native IPv6 interfaces are + // available (~AI_ALL). This saves an additional DNS roundtrip for IPv4 + // addresses. + if (req.ai_family == AF_INET6) + req.ai_flags |= AI_V4MAPPED; +#endif + + // Resolve the literal address. Some of the error info is lost in case + // of error, however, there's no way to report EAI errors via errno. + rc = getaddrinfo (interface_, NULL, &req, &res); + if (rc) { + errno = ENODEV; + return -1; + } + + // Use the first result. + zmq_assert ((size_t) (res->ai_addrlen) <= sizeof (address)); + memcpy (&address, res->ai_addr, res->ai_addrlen); + + // Cleanup getaddrinfo after copying the possibly referenced result. + if (res) + freeaddrinfo (res); + + return 0; +} + +int zmq::tcp_address_t::resolve_hostname (const char *hostname_, bool ipv4only_) +{ + // Set up the query. + addrinfo req; + memset (&req, 0, sizeof (req)); + + // Choose IPv4 or IPv6 protocol family. Note that IPv6 allows for + // IPv4-in-IPv6 addresses. + req.ai_family = ipv4only_ ? AF_INET : AF_INET6; + + // Need to choose one to avoid duplicate results from getaddrinfo() - this + // doesn't really matter, since it's not included in the addr-output. + req.ai_socktype = SOCK_STREAM; + +#ifndef ZMQ_HAVE_WINDOWS + // Windows by default maps IPv4 addresses into IPv6. In this API we only + // require IPv4-mapped addresses when no native IPv6 interfaces are + // available. This saves an additional DNS roundtrip for IPv4 addresses. + if (req.ai_family == AF_INET6) + req.ai_flags |= AI_V4MAPPED; +#endif + + // Resolve host name. Some of the error info is lost in case of error, + // however, there's no way to report EAI errors via errno. + addrinfo *res; + int rc = getaddrinfo (hostname_, NULL, &req, &res); + if (rc) { + switch (rc) { + case EAI_MEMORY: + errno = ENOMEM; + break; + default: + errno = EINVAL; + break; + } + return -1; + } + + // Copy first result to output addr with hostname and service. + zmq_assert ((size_t) (res->ai_addrlen) <= sizeof (address)); + memcpy (&address, res->ai_addr, res->ai_addrlen); + + freeaddrinfo (res); + + return 0; +} + +zmq::tcp_address_t::tcp_address_t () +{ + memset (&address, 0, sizeof (address)); +} + +zmq::tcp_address_t::~tcp_address_t () +{ +} + +int zmq::tcp_address_t::resolve (const char *name_, bool local_, bool ipv4only_) +{ + // Find the ':' at end that separates address from the port number. + const char *delimiter = strrchr (name_, ':'); + if (!delimiter) { + errno = EINVAL; + return -1; + } + + // Separate the address/port. + std::string addr_str (name_, delimiter - name_); + std::string port_str (delimiter + 1); + + // Parse the port number (0 is not a valid port). + uint16_t port = (uint16_t) atoi (port_str.c_str()); + if (port == 0) { + errno = EINVAL; + return -1; + } + + // Resolve the IP address. + int rc; + if (local_) + rc = resolve_interface (addr_str.c_str (), ipv4only_); + else + rc = resolve_hostname (addr_str.c_str (), ipv4only_); + if (rc != 0) + return -1; + + // Set the port into the address structure. + if (address.generic.sa_family == AF_INET6) + address.ipv6.sin6_port = htons (port); + else + address.ipv4.sin_port = htons (port); + + return 0; +} + +sockaddr *zmq::tcp_address_t::addr () +{ + return &address.generic; +} + +socklen_t zmq::tcp_address_t::addrlen () +{ + if (address.generic.sa_family == AF_INET6) + return (socklen_t) sizeof (address.ipv6); + else + return (socklen_t) sizeof (address.ipv4); +} + +sa_family_t zmq::tcp_address_t::family () +{ + return address.generic.sa_family; +} + diff --git a/src/tcp_address.hpp b/src/tcp_address.hpp new file mode 100644 index 0000000..7b848f9 --- /dev/null +++ b/src/tcp_address.hpp @@ -0,0 +1,68 @@ +/* + 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 <http://www.gnu.org/licenses/>. +*/ + +#ifndef __ZMQ_TCP_ADDRESS_HPP_INCLUDED__ +#define __ZMQ_TCP_ADDRESS_HPP_INCLUDED__ + +#include "platform.hpp" + +#include <sys/socket.h> +#include <netinet/in.h> + +namespace zmq +{ + + class tcp_address_t + { + public: + + tcp_address_t (); + ~tcp_address_t (); + + // This function translates textual TCP address into an address + // strcuture. If 'local' is true, names are resolved as local interface + // names. If it is false, names are resolved as remote hostnames. + // If 'ipv4only' is true, the name will never resolve to IPv6 address. + int resolve (const char* name_, bool local_, bool ipv4only_); + + sa_family_t family (); + sockaddr *addr (); + socklen_t addrlen (); + + private: + + int resolve_interface (char const *interface_, bool ipv4only_); + int resolve_hostname (const char *hostname_, bool ipv4only_); + + union { + sockaddr generic; + sockaddr_in ipv4; + sockaddr_in6 ipv6; + char padding [1024]; + } address; + + tcp_address_t (const tcp_address_t&); + const tcp_address_t &operator = (const tcp_address_t&); + }; + +} + +#endif + diff --git a/src/tcp_connecter.cpp b/src/tcp_connecter.cpp index 10e1be6..ac27181 100644 --- a/src/tcp_connecter.cpp +++ b/src/tcp_connecter.cpp @@ -56,9 +56,6 @@ zmq::tcp_connecter_t::tcp_connecter_t (class io_thread_t *io_thread_, session (session_), current_reconnect_ivl(options.reconnect_ivl) { - memset (&addr, 0, sizeof (addr)); - addr_len = 0; - // TODO: set_addess should be called separately, so that the error // can be propagated. int rc = set_address (address_); @@ -179,8 +176,7 @@ int zmq::tcp_connecter_t::get_new_reconnect_ivl () int zmq::tcp_connecter_t::set_address (const char *addr_) { - return resolve_ip_hostname (&addr, &addr_len, addr_, - options.ipv4only ? true : false); + return address.resolve (addr_, false, options.ipv4only ? true : false); } int zmq::tcp_connecter_t::open () @@ -188,7 +184,7 @@ int zmq::tcp_connecter_t::open () zmq_assert (s == retired_fd); // Create the socket. - s = socket (addr.ss_family, SOCK_STREAM, IPPROTO_TCP); + s = socket (address.family (), SOCK_STREAM, IPPROTO_TCP); #ifdef ZMQ_HAVE_WINDOWS if (s == INVALID_SOCKET) { wsa_error_to_errno (); @@ -201,14 +197,14 @@ int zmq::tcp_connecter_t::open () // On some systems, IPv4 mapping in IPv6 sockets is disabled by default. // Switch it on in such cases. - if (addr.ss_family == AF_INET6) + if (address.family () == AF_INET6) enable_ipv4_mapping (s); // Set the socket to non-blocking mode so that we get async connect(). unblock_socket (s); // Connect to the remote peer. - int rc = ::connect (s, (struct sockaddr*) &addr, addr_len); + int rc = ::connect (s, address.addr (), address.addrlen ()); // Connect was successfull immediately. if (rc == 0) diff --git a/src/tcp_connecter.hpp b/src/tcp_connecter.hpp index b5b39e8..17f8a70 100644 --- a/src/tcp_connecter.hpp +++ b/src/tcp_connecter.hpp @@ -22,10 +22,10 @@ #define __TCP_CONNECTER_HPP_INCLUDED__ #include "fd.hpp" -#include "ip.hpp" #include "own.hpp" -#include "io_object.hpp" #include "stdint.hpp" +#include "io_object.hpp" +#include "tcp_address.hpp" namespace zmq { @@ -81,8 +81,7 @@ namespace zmq fd_t connect (); // Address to connect to. - sockaddr_storage addr; - socklen_t addr_len; + tcp_address_t address; // Underlying socket. fd_t s; diff --git a/src/tcp_listener.cpp b/src/tcp_listener.cpp index dd654b2..e78a4a3 100644 --- a/src/tcp_listener.cpp +++ b/src/tcp_listener.cpp @@ -55,8 +55,6 @@ zmq::tcp_listener_t::tcp_listener_t (io_thread_t *io_thread_, s (retired_fd), socket (socket_) { - memset (&addr, 0, sizeof (addr)); - addr_len = 0; } zmq::tcp_listener_t::~tcp_listener_t () @@ -122,26 +120,25 @@ void zmq::tcp_listener_t::close () int zmq::tcp_listener_t::set_address (const char *addr_) { - // Convert the interface into sockaddr_in structure. - int rc = resolve_ip_interface (&addr, &addr_len, addr_, - options.ipv4only ? true : false); + // Convert the textual address into address structure. + int rc = address.resolve (addr_, true, options.ipv4only ? true : false); if (rc != 0) return -1; // Create a listening socket. - s = ::socket (addr.ss_family, SOCK_STREAM, IPPROTO_TCP); + s = ::socket (address.family (), SOCK_STREAM, IPPROTO_TCP); #ifdef ZMQ_HAVE_WINDOWS if (s == INVALID_SOCKET) wsa_error_to_errno (); #endif // IPv6 address family not supported, try automatic downgrade to IPv4. - if (addr.ss_family == AF_INET6 && errno == EAFNOSUPPORT && + if (address.family () == AF_INET6 && errno == EAFNOSUPPORT && !options.ipv4only) { - rc = resolve_ip_interface (&addr, &addr_len, addr_, true); + rc = address.resolve (addr_, true, true); if (rc != 0) return rc; - s = ::socket (addr.ss_family, SOCK_STREAM, IPPROTO_TCP); + s = ::socket (address.family (), SOCK_STREAM, IPPROTO_TCP); } #ifdef ZMQ_HAVE_WINDOWS @@ -156,7 +153,7 @@ int zmq::tcp_listener_t::set_address (const char *addr_) // On some systems, IPv4 mapping in IPv6 sockets is disabled by default. // Switch it on in such cases. - if (addr.ss_family == AF_INET6) + if (address.family () == AF_INET6) enable_ipv4_mapping (s); // Allow reusing of the address. @@ -171,7 +168,7 @@ int zmq::tcp_listener_t::set_address (const char *addr_) #endif // Bind the socket to the network interface and port. - rc = bind (s, (struct sockaddr*) &addr, addr_len); + rc = bind (s, address.addr (), address.addrlen ()); #ifdef ZMQ_HAVE_WINDOWS if (rc == SOCKET_ERROR) { wsa_error_to_errno (); diff --git a/src/tcp_listener.hpp b/src/tcp_listener.hpp index 69fde37..60713e3 100644 --- a/src/tcp_listener.hpp +++ b/src/tcp_listener.hpp @@ -22,10 +22,10 @@ #define __ZMQ_TCP_LISTENER_HPP_INCLUDED__ #include "fd.hpp" -#include "ip.hpp" #include "own.hpp" -#include "io_object.hpp" #include "stdint.hpp" +#include "io_object.hpp" +#include "tcp_address.hpp" namespace zmq { @@ -59,8 +59,7 @@ namespace zmq fd_t accept (); // Address to listen on. - sockaddr_storage addr; - socklen_t addr_len; + tcp_address_t address; // True, if the undelying file for UNIX domain socket exists. bool has_file; diff --git a/src/vtcp_connecter.cpp b/src/vtcp_connecter.cpp index 61e7e84..3d2900e 100644 --- a/src/vtcp_connecter.cpp +++ b/src/vtcp_connecter.cpp @@ -60,8 +60,6 @@ zmq::vtcp_connecter_t::vtcp_connecter_t (class io_thread_t *io_thread_, session (session_), current_reconnect_ivl(options.reconnect_ivl) { - memset (&addr, 0, sizeof (addr)); - addr_len = 0; subport = 0; int rc = set_address (address_); @@ -92,8 +90,7 @@ int zmq::vtcp_connecter_t::set_address (const char *addr_) addr_str += ":9220"; std::string subport_str (delimiter + 1); subport = (vtcp_subport_t) atoi (subport_str.c_str ()); - int rc = resolve_ip_hostname (&addr, &addr_len, addr_str.c_str (), - true); + int rc = address.resolve (addr_str.c_str (), false, true); if (rc != 0) return -1; } @@ -101,8 +98,7 @@ int zmq::vtcp_connecter_t::set_address (const char *addr_) std::string addr_str (addr_, delimiter - addr_); std::string subport_str (delimiter + 1); subport = (vtcp_subport_t) atoi (subport_str.c_str ()); - int rc = resolve_ip_hostname (&addr, &addr_len, addr_str.c_str (), - true); + int rc = address.resolve (addr_str.c_str (), false, true); if (rc != 0) return -1; } @@ -207,7 +203,7 @@ int zmq::vtcp_connecter_t::open () zmq_assert (s == retired_fd); // Start the connection procedure. - sockaddr_in *paddr = (sockaddr_in*) &addr; + sockaddr_in *paddr = (sockaddr_in*) address.addr (); s = vtcp_connect (paddr->sin_addr.s_addr, ntohs (paddr->sin_port)); // Connect was successfull immediately. diff --git a/src/vtcp_connecter.hpp b/src/vtcp_connecter.hpp index 61a592f..f467b5f 100644 --- a/src/vtcp_connecter.hpp +++ b/src/vtcp_connecter.hpp @@ -28,10 +28,10 @@ #include <vtcp.h> #include "fd.hpp" -#include "ip.hpp" #include "own.hpp" -#include "io_object.hpp" #include "stdint.hpp" +#include "io_object.hpp" +#include "tcp_address.hpp" namespace zmq { @@ -87,8 +87,7 @@ namespace zmq fd_t connect (); // Address to connect to. - sockaddr_storage addr; - socklen_t addr_len; + tcp_address_t address; vtcp_subport_t subport; // Underlying socket. |