IFP: Re-add the InfoPipe server

Related:
https://fedorahosted.org/sssd/ticket/2072

This commit only adds the responder and the needed plumbing. No DBus
related code is in yet.

(cherry picked from commit cb4d5b588e704114b7090678752d33512baa718e)

Conflicts:
    src/conf_macros.m4
    src/confdb/confdb.h

16 files changed, 418 insertions, 2 deletions

diff --git a/Makefile.am b/Makefile.am
index 674d1398e..dce820423 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -107,6 +107,10 @@ endif
 if BUILD_SSH
 sssdlibexec_PROGRAMS += sssd_ssh
 endif
+if BUILD_IFP
+sssdlibexec_PROGRAMS += sssd_ifp
+endif
+
 
 if BUILD_PAC_RESPONDER
     sssdlibexec_PROGRAMS += sssd_pac
@@ -305,6 +309,7 @@ AM_CPPFLAGS = \
     -DSSS_SUDO_SOCKET_NAME=\"$(pipepath)/sudo\" \
     -DSSS_AUTOFS_SOCKET_NAME=\"$(pipepath)/autofs\" \
     -DSSS_SSH_SOCKET_NAME=\"$(pipepath)/ssh\" \
+    -DSSS_IFP_SOCKET_NAME=\"$(pipepath)/ifp\" \
     -DLOCALEDIR=\"$(localedir)\"
 
 EXTRA_DIST = build/config.rpath
@@ -441,6 +446,7 @@ dist_noinst_HEADERS = \
     src/responder/sudo/sudosrv_private.h \
     src/responder/autofs/autofs_private.h \
     src/responder/ssh/sshsrv_private.h \
+    src/responder/ifp/ifp_private.h \
     src/sbus/sbus_client.h \
     src/sbus/sssd_dbus.h \
     src/sbus/sssd_dbus_meta.h \
@@ -772,6 +778,19 @@ sssd_pac_LDADD = \
     libsss_idmap.la \
     $(SSSD_INTERNAL_LTLIBS)
 
+if BUILD_IFP
+sssd_ifp_SOURCES = \
+    src/responder/ifp/ifpsrv.c \
+    src/responder/ifp/ifpsrv_cmd.c \
+    $(SSSD_UTIL_OBJ) \
+    $(SSSD_RESPONDER_OBJ)
+sssd_ifp_CFLAGS = \
+    $(AM_CFLAGS)
+sssd_ifp_LDADD = \
+    $(SSSD_LIBS) \
+    $(SSSD_INTERNAL_LTLIBS)
+endif
+
 sssd_be_SOURCES = \
     src/providers/data_provider_be.c \
     src/providers/data_provider_fo.c \
diff --git a/configure.ac b/configure.ac
index 636f87b25..49f2a64b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -124,6 +124,7 @@ WITH_SUDO
 WITH_SUDO_LIB_PATH
 WITH_AUTOFS
 WITH_SSH
+WITH_IFP
 WITH_CRYPTO
 WITH_SAMBA
 
diff --git a/contrib/sssd.spec.in b/contrib/sssd.spec.in
index 92924518c..61e6e33ef 100644
--- a/contrib/sssd.spec.in
+++ b/contrib/sssd.spec.in
@@ -380,6 +380,16 @@ Requires: libsss_nss_idmap = %{version}-%{release}
 The libsss_nss_idmap-python contains the bindings so that libsss_nss_idmap can
 be used by Python applications.
 
+%package dbus
+Summary: The D-Bus responder of the SSSD
+Group: Applications/System
+License: GPLv3+
+Requires: sssd-common = %{version}-%{release}
+
+%description dbus
+Provides the D-Bus responder of the SSSD, called the InfoPipe, that allows
+the information from the SSSD to be transmitted over the system bus.
+
 %prep
 %setup -q -n %{name}-%{version}
 
@@ -538,6 +548,7 @@ rm -rf $RPM_BUILD_ROOT
 %{_libexecdir}/%{servicename}/sssd_autofs
 %{_libexecdir}/%{servicename}/sssd_ssh
 %{_libexecdir}/%{servicename}/sssd_sudo
+%{_libexecdir}/%{servicename}/sssd_ifp
 
 %dir %{_libdir}/%{name}
 %{_libdir}/%{name}/libsss_simple.so
@@ -632,6 +643,12 @@ rm -rf $RPM_BUILD_ROOT
 %{_libexecdir}/%{servicename}/proxy_child
 %{_libdir}/%{name}/libsss_proxy.so
 
+%files dbus
+%defattr(-,root,root,-)
+%doc COPYING
+%{_libexecdir}/%{servicename}/sssd_ifp
+%{_mandir}/man5/sssd-ifp.5*
+
 %files client -f sssd_client.lang
 %defattr(-,root,root,-)
 %doc src/sss_client/COPYING src/sss_client/COPYING.LESSER
diff --git a/src/conf_macros.m4 b/src/conf_macros.m4
index 554e303b6..c12175f22 100644
--- a/src/conf_macros.m4
+++ b/src/conf_macros.m4
@@ -608,3 +608,19 @@ AC_DEFUN([WITH_SAMBA],
     fi
     AM_CONDITIONAL([BUILD_SAMBA], [test x"$with_samba" = xyes])
   ])
+
+AC_DEFUN([WITH_IFP],
+  [ AC_ARG_WITH([infopipe],
+                [AC_HELP_STRING([--with-infopipe],
+                                [Whether to build with InfoPipe support [yes]]
+                               )
+                ],
+                [with_infopipe=$withval],
+                with_infopipe=yes
+               )
+
+    if test x"$with_infopipe" = xyes; then
+        AC_DEFINE(BUILD_IFP, 1, [whether to build with InfoPipe support])
+    fi
+    AM_CONDITIONAL([BUILD_IFP], [test x"$with_infopipe" = xyes])
+  ])
diff --git a/src/confdb/confdb.h b/src/confdb/confdb.h
index c997e6e94..75f272eee 100644
--- a/src/confdb/confdb.h
+++ b/src/confdb/confdb.h
@@ -132,6 +132,9 @@
 /* Data Provider */
 #define CONFDB_DP_CONF_ENTRY "config/dp"
 
+/* InfoPipe */
+#define CONFDB_IFP_CONF_ENTRY "config/ifp"
+
 /* Domains */
 #define CONFDB_DOMAIN_PATH_TMPL "config/domain/%s"
 #define CONFDB_DOMAIN_BASEDN "cn=domain,cn=config"
diff --git a/src/man/Makefile.am b/src/man/Makefile.am
index ccf1c053e..03caef2ee 100644
--- a/src/man/Makefile.am
+++ b/src/man/Makefile.am
@@ -21,7 +21,10 @@ endif
 if BUILD_PAC_RESPONDER
 PAC_RESPONDER_CONDS = ;with_pac_responder
 endif
-CONDS = with_false$(SUDO_CONDS)$(AUTOFS_CONDS)$(SSH_CONDS)$(PAC_RESPONDER_CONDS)
+if BUILD_IFP
+IFP_CONDS = ;with_ifp
+endif
+CONDS = with_false$(SUDO_CONDS)$(AUTOFS_CONDS)$(SSH_CONDS)$(PAC_RESPONDER_CONDS)$(IFP_CONDS)
 
 
 #Special Rules:
@@ -52,6 +55,10 @@ if BUILD_SUDO
 man_MANS += sssd-sudo.5
 endif
 
+if BUILD_IFP
+man_MANS += sssd-ifp.5
+endif
+
 SUFFIXES = .1.xml .1 .3.xml .3 .5.xml .5 .8.xml .8
 .1.xml.1:
 	$(XMLLINT) $(XMLLINT_FLAGS) $<
diff --git a/src/man/include/seealso.xml b/src/man/include/seealso.xml
index 4f7943113..992e64b76 100644
--- a/src/man/include/seealso.xml
+++ b/src/man/include/seealso.xml
@@ -74,6 +74,12 @@
                     <manvolnum>8</manvolnum>
                 </citerefentry>,
             </phrase>
+            <phrase condition="with_ifp">
+                <citerefentry>
+                    <refentrytitle>sssd-ifp</refentrytitle>
+                    <manvolnum>5</manvolnum>
+                </citerefentry>,
+            </phrase>
             <citerefentry>
                 <refentrytitle>pam_sss</refentrytitle><manvolnum>8</manvolnum>
             </citerefentry>.
diff --git a/src/man/sssd-ifp.5.xml b/src/man/sssd-ifp.5.xml
new file mode 100644
index 000000000..dfac25298
--- /dev/null
+++ b/src/man/sssd-ifp.5.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
+"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
+<reference>
+<title>SSSD Manual pages</title>
+<refentry>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="include/upstream.xml" />
+
+    <refmeta>
+        <refentrytitle>sssd-ifp</refentrytitle>
+        <manvolnum>5</manvolnum>
+        <refmiscinfo class="manual">File Formats and Conventions</refmiscinfo>
+    </refmeta>
+
+    <refnamediv id='name'>
+        <refname>sssd-ifp</refname>
+        <refpurpose>SSSD InfoPipe responder</refpurpose>
+    </refnamediv>
+
+    <refsect1 id='description'>
+        <title>DESCRIPTION</title>
+        <para>
+            This manual page describes the configuration of the InfoPipe responder
+            for
+            <citerefentry>
+                <refentrytitle>sssd</refentrytitle>
+                <manvolnum>8</manvolnum>
+            </citerefentry>.
+            For a detailed syntax reference, refer to the <quote>FILE FORMAT</quote> section of the
+            <citerefentry>
+                <refentrytitle>sssd.conf</refentrytitle>
+                <manvolnum>5</manvolnum>
+            </citerefentry> manual page.
+        </para>
+        <para>
+            The InfoPipe responder provides a public D-Bus interface
+            accessible over the system bus. The interface allows the user
+            to query information about remote users and groups over the
+            system bus.
+        </para>
+    </refsect1>
+
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="include/seealso.xml" />
+
+</refentry>
+</reference>
diff --git a/src/man/sssd.conf.5.xml b/src/man/sssd.conf.5.xml
index 52a1851b1..854b55019 100644
--- a/src/man/sssd.conf.5.xml
+++ b/src/man/sssd.conf.5.xml
@@ -91,6 +91,7 @@
                                 <phrase condition="with_autofs">, autofs</phrase>
                                 <phrase condition="with_ssh">, ssh</phrase>
                                 <phrase condition="with_pac_responder">, pac</phrase>
+                                <phrase condition="with_ifp">, ifp</phrase>
                             </para>
                         </listitem>
                     </varlistentry>
diff --git a/src/monitor/monitor.c b/src/monitor/monitor.c
index aaf3e56f0..4c6ab517e 100644
--- a/src/monitor/monitor.c
+++ b/src/monitor/monitor.c
@@ -870,7 +870,7 @@ done:
 static char *check_services(char **services)
 {
     const char *known_services[] = { "nss", "pam", "sudo", "autofs", "ssh",
-                                     "pac", NULL };
+                                     "pac", "ifp", NULL };
     int i;
     int ii;
 
diff --git a/src/providers/data_provider_be.c b/src/providers/data_provider_be.c
index ac703b821..240f60318 100644
--- a/src/providers/data_provider_be.c
+++ b/src/providers/data_provider_be.c
@@ -2014,6 +2014,8 @@ static int client_registration(struct sbus_request *dbus_req, void *data)
         becli->bectx->ssh_cli = becli;
     } else if (strcasecmp(cli_name, "PAC") == 0) {
         becli->bectx->pac_cli = becli;
+    } else if (strcasecmp(cli_name, "InfoPipe") == 0) {
+        becli->bectx->ifp_cli = becli;
     } else {
         DEBUG(SSSDBG_CRIT_FAILURE, "Unknown client! [%s]\n", cli_name);
     }
diff --git a/src/providers/dp_backend.h b/src/providers/dp_backend.h
index ed022c207..8e3a68a5b 100644
--- a/src/providers/dp_backend.h
+++ b/src/providers/dp_backend.h
@@ -143,6 +143,7 @@ struct be_ctx {
     struct be_client *autofs_cli;
     struct be_client *ssh_cli;
     struct be_client *pac_cli;
+    struct be_client *ifp_cli;
 
     struct loaded_be loaded_be[BET_MAX];
     struct bet_info bet_info[BET_MAX];
diff --git a/src/responder/common/responder_sbus.h b/src/responder/common/responder_sbus.h
index 4927d72a7..ca1ce512b 100644
--- a/src/responder/common/responder_sbus.h
+++ b/src/responder/common/responder_sbus.h
@@ -37,6 +37,9 @@
 #define SSS_SSH_SBUS_SERVICE_NAME    "ssh"
 #define SSS_SSH_SBUS_SERVICE_VERSION 0x0001
 
+#define SSS_IFP_SBUS_SERVICE_NAME    "ifp"
+#define SSS_IFP_SBUS_SERVICE_VERSION 0x0001
+
 #define PAC_SBUS_SERVICE_NAME "pac"
 #define PAC_SBUS_SERVICE_VERSION 0x0001
 
diff --git a/src/responder/ifp/ifp_private.h b/src/responder/ifp/ifp_private.h
new file mode 100644
index 000000000..32c7281ea
--- /dev/null
+++ b/src/responder/ifp/ifp_private.h
@@ -0,0 +1,35 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+        Stephen Gallagher <sgallagh@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: A private header
+
+    This program 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.
+
+    This program 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/>.
+*/
+
+#ifndef _IFPSRV_PRIVATE_H_
+#define _IFPSRV_PRIVATE_H_
+
+#include "responder/common/responder.h"
+#include "providers/data_provider.h"
+
+struct ifp_ctx {
+    struct resp_ctx *rctx;
+    struct sss_names_ctx *snctx;
+};
+
+#endif /* _IFPSRV_PRIVATE_H_ */
diff --git a/src/responder/ifp/ifpsrv.c b/src/responder/ifp/ifpsrv.c
new file mode 100644
index 000000000..06434c328
--- /dev/null
+++ b/src/responder/ifp/ifpsrv.c
@@ -0,0 +1,227 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: the responder server
+
+    This program 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.
+
+    This program 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 <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <string.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <popt.h>
+#include <dbus/dbus.h>
+
+#include "util/util.h"
+#include "sbus/sssd_dbus.h"
+#include "monitor/monitor_interfaces.h"
+#include "confdb/confdb.h"
+#include "responder/ifp/ifp_private.h"
+#include "responder/common/responder_sbus.h"
+
+struct mon_cli_iface monitor_ifp_methods = {
+    { &mon_cli_iface_meta, 0 },
+    .ping = monitor_common_pong,
+    .resInit = monitor_common_res_init,
+    .shutDown = NULL,
+    .goOffline = NULL,
+    .resetOffline = NULL,
+    .rotateLogs = responder_logrotate,
+};
+
+static struct data_provider_iface ifp_dp_methods = {
+    { &data_provider_iface_meta, 0 },
+    .RegisterService = NULL,
+    .pamHandler = NULL,
+    .sudoHandler = NULL,
+    .autofsHandler = NULL,
+    .hostHandler = NULL,
+    .getDomains = NULL,
+    .getAccountInfo = NULL,
+};
+
+struct sss_cmd_table *get_ifp_cmds(void)
+{
+    static struct sss_cmd_table ifp_cmds[] = {
+        { SSS_GET_VERSION, sss_cmd_get_version },
+        { SSS_CLI_NULL, NULL}
+    };
+
+    return ifp_cmds;
+}
+
+static void ifp_dp_reconnect_init(struct sbus_connection *conn,
+                                  int status, void *pvt)
+{
+    struct be_conn *be_conn = talloc_get_type(pvt, struct be_conn);
+    int ret;
+
+    /* Did we reconnect successfully? */
+    if (status == SBUS_RECONNECT_SUCCESS) {
+        DEBUG(SSSDBG_TRACE_FUNC, "Reconnected to the Data Provider.\n");
+
+        /* Identify ourselves to the data provider */
+        ret = dp_common_send_id(be_conn->conn,
+                                DATA_PROVIDER_VERSION,
+                                "InfoPipe");
+        /* all fine */
+        if (ret == EOK) {
+            handle_requests_after_reconnect(be_conn->rctx);
+            return;
+        }
+    }
+
+    /* Failed to reconnect */
+    DEBUG(SSSDBG_FATAL_FAILURE, "Could not reconnect to %s provider.\n",
+                                 be_conn->domain->name);
+}
+
+int ifp_process_init(TALLOC_CTX *mem_ctx,
+                     struct tevent_context *ev,
+                     struct confdb_ctx *cdb)
+{
+    struct resp_ctx *rctx;
+    struct sss_cmd_table *ifp_cmds;
+    struct ifp_ctx *ifp_ctx;
+    struct be_conn *iter;
+    int ret;
+    int max_retries;
+
+    ifp_cmds = get_ifp_cmds();
+    ret = sss_process_init(mem_ctx, ev, cdb,
+                           ifp_cmds,
+                           SSS_IFP_SOCKET_NAME, NULL,
+                           CONFDB_IFP_CONF_ENTRY,
+                           SSS_IFP_SBUS_SERVICE_NAME,
+                           SSS_IFP_SBUS_SERVICE_VERSION,
+                           &monitor_ifp_methods,
+                           "InfoPipe",
+                           &ifp_dp_methods.vtable,
+                           &rctx);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_FATAL_FAILURE, "sss_process_init() failed\n");
+        return ret;
+    }
+
+    ifp_ctx = talloc_zero(rctx, struct ifp_ctx);
+    if (ifp_ctx == NULL) {
+        DEBUG(SSSDBG_FATAL_FAILURE, "fatal error initializing ifp_ctx\n");
+        ret = ENOMEM;
+        goto fail;
+    }
+
+    ifp_ctx->rctx = rctx;
+    ifp_ctx->rctx->pvt_ctx = ifp_ctx;
+
+    ret = sss_names_init_from_args(ifp_ctx,
+                                   "(?P<name>[^@]+)@?(?P<domain>[^@]*$)",
+                                   "%1$s@%2$s", &ifp_ctx->snctx);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_FATAL_FAILURE, "fatal error initializing regex data\n");
+        goto fail;
+    }
+
+    /* Enable automatic reconnection to the Data Provider */
+    ret = confdb_get_int(ifp_ctx->rctx->cdb,
+                         CONFDB_IFP_CONF_ENTRY,
+                         CONFDB_SERVICE_RECON_RETRIES,
+                         3, &max_retries);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_FATAL_FAILURE,
+              "Failed to set up automatic reconnection\n");
+        goto fail;
+    }
+
+    for (iter = ifp_ctx->rctx->be_conns; iter; iter = iter->next) {
+        sbus_reconnect_init(iter->conn, max_retries,
+                            ifp_dp_reconnect_init, iter);
+    }
+
+    ret = schedule_get_domains_task(rctx, rctx->ev, rctx);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_FATAL_FAILURE, "schedule_get_domains_tasks failed.\n");
+        goto fail;
+    }
+
+    DEBUG(SSSDBG_TRACE_FUNC, "InfoPipe Initialization complete\n");
+    return EOK;
+
+fail:
+    talloc_free(rctx);
+    return ret;
+}
+
+int main(int argc, const char *argv[])
+{
+    int opt;
+    poptContext pc;
+    struct main_context *main_ctx;
+    int ret;
+
+    struct poptOption long_options[] = {
+        POPT_AUTOHELP
+        SSSD_MAIN_OPTS
+        POPT_TABLEEND
+    };
+
+    /* Set debug level to invalid value so we can deside if -d 0 was used. */
+    debug_level = SSSDBG_INVALID;
+
+    pc = poptGetContext(argv[0], argc, argv, long_options, 0);
+    while((opt = poptGetNextOpt(pc)) != -1) {
+        switch(opt) {
+        default:
+            fprintf(stderr, "\nInvalid option %s: %s\n\n",
+                  poptBadOption(pc, 0), poptStrerror(opt));
+            poptPrintUsage(pc, stderr, 0);
+            return 1;
+        }
+    }
+
+    poptFreeContext(pc);
+
+    DEBUG_INIT(debug_level);
+
+    /* set up things like debug, signals, daemonization, etc... */
+    debug_log_file = "sssd_ifp";
+
+    ret = server_setup("sssd[ifp]", 0, CONFDB_IFP_CONF_ENTRY, &main_ctx);
+    if (ret != EOK) return 2;
+
+    ret = die_if_parent_died();
+    if (ret != EOK) {
+        /* This is not fatal, don't return */
+        DEBUG(SSSDBG_MINOR_FAILURE,
+              "Could not set up to exit when parent process does\n");
+    }
+
+    ret = ifp_process_init(main_ctx,
+                           main_ctx->event_ctx,
+                           main_ctx->confdb_ctx);
+    if (ret != EOK) return 3;
+
+    /* loop on main */
+    server_loop(main_ctx);
+    return 0;
+}
diff --git a/src/responder/ifp/ifpsrv_cmd.c b/src/responder/ifp/ifpsrv_cmd.c
new file mode 100644
index 000000000..b9641ff60
--- /dev/null
+++ b/src/responder/ifp/ifpsrv_cmd.c
@@ -0,0 +1,32 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: the responder commands
+
+    This program 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.
+
+    This program 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 "responder/ifp/ifp_private.h"
+
+struct cli_protocol_version *register_cli_protocol_version(void)
+{
+    static struct cli_protocol_version ssh_cli_protocol_version[] = {
+        {0, NULL, NULL}
+    };
+
+    return ssh_cli_protocol_version;
+}