Move rpc to top-level

Signed-off-by: Vijay Bellur <vijay@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

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 000000000..763fa3dd0
--- /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;
+}