diff options
Diffstat (limited to 'rpc/rpc-transport/socket/src/name.c')
| -rw-r--r-- | rpc/rpc-transport/socket/src/name.c | 737 |
1 files changed, 737 insertions, 0 deletions
diff --git a/rpc/rpc-transport/socket/src/name.c b/rpc/rpc-transport/socket/src/name.c new file mode 100644 index 00000000000..763fa3dd09b --- /dev/null +++ b/rpc/rpc-transport/socket/src/name.c @@ -0,0 +1,737 @@ +/* + Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <errno.h> +#include <netdb.h> +#include <string.h> + +#ifdef CLIENT_PORT_CEILING +#undef CLIENT_PORT_CEILING +#endif + +#define CLIENT_PORT_CEILING 1024 + +#ifndef AF_INET_SDP +#define AF_INET_SDP 27 +#endif + +#include "rpc-transport.h" +#include "socket.h" + +int32_t +gf_resolve_ip6 (const char *hostname, + uint16_t port, + int family, + void **dnscache, + struct addrinfo **addr_info); + +static int32_t +af_inet_bind_to_port_lt_ceiling (int fd, struct sockaddr *sockaddr, + socklen_t sockaddr_len, int ceiling) +{ + int32_t ret = -1; + /* struct sockaddr_in sin = {0, }; */ + uint16_t port = ceiling - 1; + + while (port) + { + switch (sockaddr->sa_family) + { + case AF_INET6: + ((struct sockaddr_in6 *)sockaddr)->sin6_port = htons (port); + break; + + case AF_INET_SDP: + case AF_INET: + ((struct sockaddr_in *)sockaddr)->sin_port = htons (port); + break; + } + + ret = bind (fd, sockaddr, sockaddr_len); + + if (ret == 0) + break; + + if (ret == -1 && errno == EACCES) + break; + + port--; + } + + return ret; +} + +static int32_t +af_unix_client_bind (rpc_transport_t *this, + struct sockaddr *sockaddr, + socklen_t sockaddr_len, + int sock) +{ + data_t *path_data = NULL; + struct sockaddr_un *addr = NULL; + int32_t ret = 0; + + path_data = dict_get (this->options, "transport.socket.bind-path"); + if (path_data) { + char *path = data_to_str (path_data); + if (!path || strlen (path) > UNIX_PATH_MAX) { + gf_log (this->name, GF_LOG_TRACE, + "bind-path not specfied for unix socket, " + "letting connect to assign default value"); + goto err; + } + + addr = (struct sockaddr_un *) sockaddr; + strcpy (addr->sun_path, path); + ret = bind (sock, (struct sockaddr *)addr, sockaddr_len); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, + "cannot bind to unix-domain socket %d (%s)", + sock, strerror (errno)); + goto err; + } + } else { + gf_log (this->name, GF_LOG_TRACE, + "bind-path not specfied for unix socket, " + "letting connect to assign default value"); + } + +err: + return ret; +} + +int32_t +client_fill_address_family (rpc_transport_t *this, sa_family_t *sa_family) +{ + data_t *address_family_data = NULL; + int32_t ret = -1; + + if (sa_family == NULL) { + goto out; + } + + address_family_data = dict_get (this->options, + "transport.address-family"); + if (!address_family_data) { + data_t *remote_host_data = NULL, *connect_path_data = NULL; + remote_host_data = dict_get (this->options, "remote-host"); + connect_path_data = dict_get (this->options, + "transport.socket.connect-path"); + + if (!(remote_host_data || connect_path_data) || + (remote_host_data && connect_path_data)) { + gf_log (this->name, GF_LOG_ERROR, + "transport.address-family not specified and " + "not able to determine the " + "same from other options (remote-host:%s and " + "transport.unix.connect-path:%s)", + data_to_str (remote_host_data), + data_to_str (connect_path_data)); + goto out; + } + + if (remote_host_data) { + gf_log (this->name, GF_LOG_DEBUG, + "address-family not specified, guessing it " + "to be inet/inet6"); + *sa_family = AF_UNSPEC; + } else { + gf_log (this->name, GF_LOG_DEBUG, + "address-family not specified, guessing it " + "to be unix"); + *sa_family = AF_UNIX; + } + + } else { + char *address_family = data_to_str (address_family_data); + if (!strcasecmp (address_family, "unix")) { + *sa_family = AF_UNIX; + } else if (!strcasecmp (address_family, "inet")) { + *sa_family = AF_INET; + } else if (!strcasecmp (address_family, "inet6")) { + *sa_family = AF_INET6; + } else if (!strcasecmp (address_family, "inet-sdp")) { + *sa_family = AF_INET_SDP; + } else if (!strcasecmp (address_family, "inet/inet6") + || !strcasecmp (address_family, "inet6/inet")) { + *sa_family = AF_UNSPEC; + } else { + gf_log (this->name, GF_LOG_ERROR, + "unknown address-family (%s) specified", + address_family); + goto out; + } + } + + ret = 0; + +out: + return ret; +} + +static int32_t +af_inet_client_get_remote_sockaddr (rpc_transport_t *this, + struct sockaddr *sockaddr, + socklen_t *sockaddr_len) +{ + dict_t *options = this->options; + data_t *remote_host_data = NULL; + data_t *remote_port_data = NULL; + char *remote_host = NULL; + uint16_t remote_port = 0; + struct addrinfo *addr_info = NULL; + int32_t ret = 0; + + remote_host_data = dict_get (options, "remote-host"); + if (remote_host_data == NULL) + { + gf_log (this->name, GF_LOG_ERROR, + "option remote-host missing in volume %s", this->name); + ret = -1; + goto err; + } + + remote_host = data_to_str (remote_host_data); + if (remote_host == NULL) + { + gf_log (this->name, GF_LOG_ERROR, + "option remote-host has data NULL in volume %s", this->name); + ret = -1; + goto err; + } + + remote_port_data = dict_get (options, "remote-port"); + if (remote_port_data == NULL) + { + gf_log (this->name, GF_LOG_TRACE, + "option remote-port missing in volume %s. Defaulting to %d", + this->name, GF_DEFAULT_SOCKET_LISTEN_PORT); + + remote_port = GF_DEFAULT_SOCKET_LISTEN_PORT; + } + else + { + remote_port = data_to_uint16 (remote_port_data); + } + + if (remote_port == (uint16_t)-1) + { + gf_log (this->name, GF_LOG_ERROR, + "option remote-port has invalid port in volume %s", + this->name); + ret = -1; + goto err; + } + + /* TODO: gf_resolve is a blocking call. kick in some + non blocking dns techniques */ + ret = gf_resolve_ip6 (remote_host, remote_port, + sockaddr->sa_family, &this->dnscache, &addr_info); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, + "DNS resolution failed on host %s", remote_host); + goto err; + } + + memcpy (sockaddr, addr_info->ai_addr, addr_info->ai_addrlen); + *sockaddr_len = addr_info->ai_addrlen; + +err: + return ret; +} + +static int32_t +af_unix_client_get_remote_sockaddr (rpc_transport_t *this, + struct sockaddr *sockaddr, + socklen_t *sockaddr_len) +{ + struct sockaddr_un *sockaddr_un = NULL; + char *connect_path = NULL; + data_t *connect_path_data = NULL; + int32_t ret = 0; + + connect_path_data = dict_get (this->options, + "transport.socket.connect-path"); + if (!connect_path_data) { + gf_log (this->name, GF_LOG_ERROR, + "option transport.unix.connect-path not specified for " + "address-family unix"); + ret = -1; + goto err; + } + + connect_path = data_to_str (connect_path_data); + if (!connect_path) { + gf_log (this->name, GF_LOG_ERROR, + "transport.unix.connect-path is null-string"); + ret = -1; + goto err; + } + + if (strlen (connect_path) > UNIX_PATH_MAX) { + gf_log (this->name, GF_LOG_ERROR, + "connect-path value length %"GF_PRI_SIZET" > %d octets", + strlen (connect_path), UNIX_PATH_MAX); + ret = -1; + goto err; + } + + gf_log (this->name, GF_LOG_TRACE, + "using connect-path %s", connect_path); + sockaddr_un = (struct sockaddr_un *)sockaddr; + strcpy (sockaddr_un->sun_path, connect_path); + *sockaddr_len = sizeof (struct sockaddr_un); + +err: + return ret; +} + +static int32_t +af_unix_server_get_local_sockaddr (rpc_transport_t *this, + struct sockaddr *addr, + socklen_t *addr_len) +{ + data_t *listen_path_data = NULL; + char *listen_path = NULL; + int32_t ret = 0; + struct sockaddr_un *sunaddr = (struct sockaddr_un *)addr; + + + listen_path_data = dict_get (this->options, + "transport.socket.listen-path"); + if (!listen_path_data) { + gf_log (this->name, GF_LOG_ERROR, + "missing option transport.socket.listen-path"); + ret = -1; + goto err; + } + + listen_path = data_to_str (listen_path_data); + +#ifndef UNIX_PATH_MAX +#define UNIX_PATH_MAX 108 +#endif + + if (strlen (listen_path) > UNIX_PATH_MAX) { + gf_log (this->name, GF_LOG_ERROR, + "option transport.unix.listen-path has value length " + "%"GF_PRI_SIZET" > %d", + strlen (listen_path), UNIX_PATH_MAX); + ret = -1; + goto err; + } + + sunaddr->sun_family = AF_UNIX; + strcpy (sunaddr->sun_path, listen_path); + *addr_len = sizeof (struct sockaddr_un); + +err: + return ret; +} + +static int32_t +af_inet_server_get_local_sockaddr (rpc_transport_t *this, + struct sockaddr *addr, + socklen_t *addr_len) +{ + struct addrinfo hints, *res = 0; + data_t *listen_port_data = NULL, *listen_host_data = NULL; + uint16_t listen_port = -1; + char service[NI_MAXSERV], *listen_host = NULL; + dict_t *options = NULL; + int32_t ret = 0; + + options = this->options; + + listen_port_data = dict_get (options, "transport.socket.listen-port"); + listen_host_data = dict_get (options, "transport.socket.bind-address"); + + if (listen_port_data) + { + listen_port = data_to_uint16 (listen_port_data); + } + + if (listen_port == (uint16_t) -1) + listen_port = GF_DEFAULT_SOCKET_LISTEN_PORT; + + + if (listen_host_data) + { + listen_host = data_to_str (listen_host_data); + } else { + if (addr->sa_family == AF_INET6) { + struct sockaddr_in6 *in = (struct sockaddr_in6 *) addr; + in->sin6_addr = in6addr_any; + in->sin6_port = htons(listen_port); + *addr_len = sizeof(struct sockaddr_in6); + goto out; + } else if (addr->sa_family == AF_INET) { + struct sockaddr_in *in = (struct sockaddr_in *) addr; + in->sin_addr.s_addr = htonl(INADDR_ANY); + in->sin_port = htons(listen_port); + *addr_len = sizeof(struct sockaddr_in); + goto out; + } + } + + memset (service, 0, sizeof (service)); + sprintf (service, "%d", listen_port); + + memset (&hints, 0, sizeof (hints)); + hints.ai_family = addr->sa_family; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE; + + ret = getaddrinfo(listen_host, service, &hints, &res); + if (ret != 0) { + gf_log (this->name, GF_LOG_ERROR, + "getaddrinfo failed for host %s, service %s (%s)", + listen_host, service, gai_strerror (ret)); + ret = -1; + goto out; + } + + memcpy (addr, res->ai_addr, res->ai_addrlen); + *addr_len = res->ai_addrlen; + + freeaddrinfo (res); + +out: + return ret; +} + +int32_t +client_bind (rpc_transport_t *this, + struct sockaddr *sockaddr, + socklen_t *sockaddr_len, + int sock) +{ + int ret = 0; + + *sockaddr_len = sizeof (struct sockaddr_in6); + switch (sockaddr->sa_family) + { + case AF_INET_SDP: + case AF_INET: + *sockaddr_len = sizeof (struct sockaddr_in); + + case AF_INET6: + ret = af_inet_bind_to_port_lt_ceiling (sock, sockaddr, + *sockaddr_len, CLIENT_PORT_CEILING); + if (ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "cannot bind inet socket (%d) to port less than %d (%s)", + sock, CLIENT_PORT_CEILING, strerror (errno)); + ret = 0; + } + break; + + case AF_UNIX: + *sockaddr_len = sizeof (struct sockaddr_un); + ret = af_unix_client_bind (this, (struct sockaddr *)sockaddr, + *sockaddr_len, sock); + break; + + default: + gf_log (this->name, GF_LOG_ERROR, + "unknown address family %d", sockaddr->sa_family); + ret = -1; + break; + } + + return ret; +} + +int32_t +socket_client_get_remote_sockaddr (rpc_transport_t *this, + struct sockaddr *sockaddr, + socklen_t *sockaddr_len, + sa_family_t *sa_family) +{ + int32_t ret = 0; + + if ((sockaddr == NULL) || (sockaddr_len == NULL) + || (sa_family == NULL)) { + ret = -1; + goto err; + } + + + ret = client_fill_address_family (this, &sockaddr->sa_family); + if (ret) { + ret = -1; + goto err; + } + + *sa_family = sockaddr->sa_family; + + switch (sockaddr->sa_family) + { + case AF_INET_SDP: + sockaddr->sa_family = AF_INET; + + case AF_INET: + case AF_INET6: + case AF_UNSPEC: + ret = af_inet_client_get_remote_sockaddr (this, sockaddr, + sockaddr_len); + break; + + case AF_UNIX: + ret = af_unix_client_get_remote_sockaddr (this, sockaddr, + sockaddr_len); + break; + + default: + gf_log (this->name, GF_LOG_ERROR, + "unknown address-family %d", sockaddr->sa_family); + ret = -1; + } + + if (*sa_family == AF_UNSPEC) { + *sa_family = sockaddr->sa_family; + } + +err: + return ret; +} + + +int32_t +server_fill_address_family (rpc_transport_t *this, sa_family_t *sa_family) +{ + data_t *address_family_data = NULL; + int32_t ret = -1; + + if (sa_family == NULL) { + goto out; + } + + address_family_data = dict_get (this->options, + "transport.address-family"); + if (address_family_data) { + char *address_family = NULL; + address_family = data_to_str (address_family_data); + + if (!strcasecmp (address_family, "inet")) { + *sa_family = AF_INET; + } else if (!strcasecmp (address_family, "inet6")) { + *sa_family = AF_INET6; + } else if (!strcasecmp (address_family, "inet-sdp")) { + *sa_family = AF_INET_SDP; + } else if (!strcasecmp (address_family, "unix")) { + *sa_family = AF_UNIX; + } else if (!strcasecmp (address_family, "inet/inet6") + || !strcasecmp (address_family, "inet6/inet")) { + *sa_family = AF_UNSPEC; + } else { + gf_log (this->name, GF_LOG_ERROR, + "unknown address family (%s) specified", address_family); + goto out; + } + } else { + gf_log (this->name, GF_LOG_DEBUG, + "option address-family not specified, defaulting to inet/inet6"); + *sa_family = AF_UNSPEC; + } + + ret = 0; +out: + return ret; +} + + +int32_t +socket_server_get_local_sockaddr (rpc_transport_t *this, struct sockaddr *addr, + socklen_t *addr_len, sa_family_t *sa_family) +{ + int32_t ret = -1; + + if ((addr == NULL) || (addr_len == NULL) || (sa_family == NULL)) { + goto err; + } + + ret = server_fill_address_family (this, &addr->sa_family); + if (ret == -1) { + goto err; + } + + *sa_family = addr->sa_family; + + switch (addr->sa_family) + { + case AF_INET_SDP: + addr->sa_family = AF_INET; + + case AF_INET: + case AF_INET6: + case AF_UNSPEC: + ret = af_inet_server_get_local_sockaddr (this, addr, addr_len); + break; + + case AF_UNIX: + ret = af_unix_server_get_local_sockaddr (this, addr, addr_len); + break; + } + + if (*sa_family == AF_UNSPEC) { + *sa_family = addr->sa_family; + } + +err: + return ret; +} + +int32_t +fill_inet6_inet_identifiers (rpc_transport_t *this, struct sockaddr_storage *addr, + int32_t addr_len, char *identifier) +{ + int32_t ret = 0, tmpaddr_len = 0; + char service[NI_MAXSERV], host[NI_MAXHOST]; + struct sockaddr_storage tmpaddr; + + memset (&tmpaddr, 0, sizeof (tmpaddr)); + tmpaddr = *addr; + tmpaddr_len = addr_len; + + if (((struct sockaddr *) &tmpaddr)->sa_family == AF_INET6) { + int32_t one_to_four, four_to_eight, twelve_to_sixteen; + int16_t eight_to_ten, ten_to_twelve; + + one_to_four = four_to_eight = twelve_to_sixteen = 0; + eight_to_ten = ten_to_twelve = 0; + + one_to_four = ((struct sockaddr_in6 *) &tmpaddr)->sin6_addr.s6_addr32[0]; + four_to_eight = ((struct sockaddr_in6 *) &tmpaddr)->sin6_addr.s6_addr32[1]; +#ifdef GF_SOLARIS_HOST_OS + eight_to_ten = S6_ADDR16(((struct sockaddr_in6 *) &tmpaddr)->sin6_addr)[4]; +#else + eight_to_ten = ((struct sockaddr_in6 *) &tmpaddr)->sin6_addr.s6_addr16[4]; +#endif + +#ifdef GF_SOLARIS_HOST_OS + ten_to_twelve = S6_ADDR16(((struct sockaddr_in6 *) &tmpaddr)->sin6_addr)[5]; +#else + ten_to_twelve = ((struct sockaddr_in6 *) &tmpaddr)->sin6_addr.s6_addr16[5]; +#endif + + twelve_to_sixteen = ((struct sockaddr_in6 *) &tmpaddr)->sin6_addr.s6_addr32[3]; + + /* ipv4 mapped ipv6 address has + bits 0-80: 0 + bits 80-96: 0xffff + bits 96-128: ipv4 address + */ + + if (one_to_four == 0 && + four_to_eight == 0 && + eight_to_ten == 0 && + ten_to_twelve == -1) { + struct sockaddr_in *in_ptr = (struct sockaddr_in *)&tmpaddr; + memset (&tmpaddr, 0, sizeof (tmpaddr)); + + in_ptr->sin_family = AF_INET; + in_ptr->sin_port = ((struct sockaddr_in6 *)addr)->sin6_port; + in_ptr->sin_addr.s_addr = twelve_to_sixteen; + tmpaddr_len = sizeof (*in_ptr); + } + } + + ret = getnameinfo ((struct sockaddr *) &tmpaddr, + tmpaddr_len, + host, sizeof (host), + service, sizeof (service), + NI_NUMERICHOST | NI_NUMERICSERV); + if (ret != 0) { + gf_log (this->name, GF_LOG_ERROR, + "getnameinfo failed (%s)", gai_strerror (ret)); + } + + sprintf (identifier, "%s:%s", host, service); + + return ret; +} + +int32_t +get_transport_identifiers (rpc_transport_t *this) +{ + int32_t ret = 0; + char is_inet_sdp = 0; + + switch (((struct sockaddr *) &this->myinfo.sockaddr)->sa_family) + { + case AF_INET_SDP: + is_inet_sdp = 1; + ((struct sockaddr *) &this->peerinfo.sockaddr)->sa_family = ((struct sockaddr *) &this->myinfo.sockaddr)->sa_family = AF_INET; + + case AF_INET: + case AF_INET6: + { + ret = fill_inet6_inet_identifiers (this, + &this->myinfo.sockaddr, + this->myinfo.sockaddr_len, + this->myinfo.identifier); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, + "cannot fill inet/inet6 identifier for server"); + goto err; + } + + ret = fill_inet6_inet_identifiers (this, + &this->peerinfo.sockaddr, + this->peerinfo.sockaddr_len, + this->peerinfo.identifier); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, + "cannot fill inet/inet6 identifier for client"); + goto err; + } + + if (is_inet_sdp) { + ((struct sockaddr *) &this->peerinfo.sockaddr)->sa_family = ((struct sockaddr *) &this->myinfo.sockaddr)->sa_family = AF_INET_SDP; + } + } + break; + + case AF_UNIX: + { + struct sockaddr_un *sunaddr = NULL; + + sunaddr = (struct sockaddr_un *) &this->myinfo.sockaddr; + strcpy (this->myinfo.identifier, sunaddr->sun_path); + + sunaddr = (struct sockaddr_un *) &this->peerinfo.sockaddr; + strcpy (this->peerinfo.identifier, sunaddr->sun_path); + } + break; + + default: + gf_log (this->name, GF_LOG_ERROR, + "unknown address family (%d)", + ((struct sockaddr *) &this->myinfo.sockaddr)->sa_family); + ret = -1; + break; + } + +err: + return ret; +} |