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-rw-r--r--src/responder/common/responder_common.c589
1 files changed, 589 insertions, 0 deletions
diff --git a/src/responder/common/responder_common.c b/src/responder/common/responder_common.c
new file mode 100644
index 000000000..37bbcb30f
--- /dev/null
+++ b/src/responder/common/responder_common.c
@@ -0,0 +1,589 @@
+/*
+ SSSD
+
+ Common Responder methods
+
+ Copyright (C) Simo Sorce <ssorce@redhat.com> 2008
+
+ 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 "util/util.h"
+#include "db/sysdb.h"
+#include "confdb/confdb.h"
+#include "dbus/dbus.h"
+#include "sbus/sssd_dbus.h"
+#include "responder/common/responder.h"
+#include "responder/common/responder_packet.h"
+#include "providers/data_provider.h"
+#include "monitor/monitor_interfaces.h"
+#include "sbus/sbus_client.h"
+
+static void set_nonblocking(int fd)
+{
+ unsigned v;
+ v = fcntl(fd, F_GETFL, 0);
+ fcntl(fd, F_SETFL, v | O_NONBLOCK);
+}
+
+static void set_close_on_exec(int fd)
+{
+ unsigned v;
+ v = fcntl(fd, F_GETFD, 0);
+ fcntl(fd, F_SETFD, v | FD_CLOEXEC);
+}
+
+static int client_destructor(struct cli_ctx *ctx)
+{
+ if (ctx->cfd > 0) close(ctx->cfd);
+ return 0;
+}
+
+static void client_send(struct tevent_context *ev, struct cli_ctx *cctx)
+{
+ int ret;
+
+ ret = sss_packet_send(cctx->creq->out, cctx->cfd);
+ if (ret == EAGAIN) {
+ /* not all data was sent, loop again */
+ return;
+ }
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to read request, aborting client!\n"));
+ talloc_free(cctx);
+ return;
+ }
+
+ /* ok all sent */
+ TEVENT_FD_NOT_WRITEABLE(cctx->cfde);
+ TEVENT_FD_READABLE(cctx->cfde);
+ talloc_free(cctx->creq);
+ cctx->creq = NULL;
+ return;
+}
+
+static void client_recv(struct tevent_context *ev, struct cli_ctx *cctx)
+{
+ int ret;
+
+ if (!cctx->creq) {
+ cctx->creq = talloc_zero(cctx, struct cli_request);
+ if (!cctx->creq) {
+ DEBUG(0, ("Failed to alloc request, aborting client!\n"));
+ talloc_free(cctx);
+ return;
+ }
+ }
+
+ if (!cctx->creq->in) {
+ ret = sss_packet_new(cctx->creq, SSS_PACKET_MAX_RECV_SIZE,
+ 0, &cctx->creq->in);
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to alloc request, aborting client!\n"));
+ talloc_free(cctx);
+ return;
+ }
+ }
+
+ ret = sss_packet_recv(cctx->creq->in, cctx->cfd);
+ switch (ret) {
+ case EOK:
+ /* do not read anymore */
+ TEVENT_FD_NOT_READABLE(cctx->cfde);
+ /* execute command */
+ ret = sss_cmd_execute(cctx, cctx->rctx->sss_cmds);
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to execute request, aborting client!\n"));
+ talloc_free(cctx);
+ }
+ /* past this point cctx can be freed at any time by callbacks
+ * in case of error, do not use it */
+ return;
+
+ case EAGAIN:
+ /* need to read still some data, loop again */
+ break;
+
+ case EINVAL:
+ DEBUG(6, ("Invalid data from client, closing connection!\n"));
+ talloc_free(cctx);
+ break;
+
+ case ENODATA:
+ DEBUG(5, ("Client disconnected!\n"));
+ talloc_free(cctx);
+ break;
+
+ default:
+ DEBUG(6, ("Failed to read request, aborting client!\n"));
+ talloc_free(cctx);
+ }
+
+ return;
+}
+
+static void client_fd_handler(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags, void *ptr)
+{
+ struct cli_ctx *cctx = talloc_get_type(ptr, struct cli_ctx);
+
+ if (flags & TEVENT_FD_READ) {
+ client_recv(ev, cctx);
+ return;
+ }
+ if (flags & TEVENT_FD_WRITE) {
+ client_send(ev, cctx);
+ return;
+ }
+}
+
+/* TODO: this is a copy of accept_fd_handler, maybe both can be put into on
+ * handler. */
+static void accept_priv_fd_handler(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags, void *ptr)
+{
+ /* accept and attach new event handler */
+ struct resp_ctx *rctx = talloc_get_type(ptr, struct resp_ctx);
+ struct cli_ctx *cctx;
+ socklen_t len;
+ struct stat stat_buf;
+ int ret;
+
+ ret = stat(rctx->priv_sock_name, &stat_buf);
+ if (ret == -1) {
+ DEBUG(1, ("stat on privileged pipe failed: [%d][%s].\n", errno,
+ strerror(errno)));
+ return;
+ }
+
+ if ( ! (stat_buf.st_uid == 0 && stat_buf.st_gid == 0 &&
+ (stat_buf.st_mode&(S_IFSOCK|S_IRUSR|S_IWUSR)) == stat_buf.st_mode)) {
+ DEBUG(1, ("privileged pipe has an illegal status.\n"));
+/* TODO: what is the best response to this condition? Terminate? */
+ return;
+ }
+
+
+ cctx = talloc_zero(rctx, struct cli_ctx);
+ if (!cctx) {
+ struct sockaddr_un addr;
+ int fd;
+ DEBUG(0, ("Out of memory trying to setup client context on privileged pipe!\n"));
+ /* accept and close to signal the client we have a problem */
+ memset(&addr, 0, sizeof(addr));
+ len = sizeof(addr);
+ fd = accept(rctx->priv_lfd, (struct sockaddr *)&addr, &len);
+ if (fd == -1) {
+ return;
+ }
+ close(fd);
+ return;
+ }
+
+ len = sizeof(cctx->addr);
+ cctx->cfd = accept(rctx->priv_lfd, (struct sockaddr *)&cctx->addr, &len);
+ if (cctx->cfd == -1) {
+ DEBUG(1, ("Accept failed [%s]", strerror(errno)));
+ talloc_free(cctx);
+ return;
+ }
+
+ cctx->priv = 1;
+
+ cctx->cfde = tevent_add_fd(ev, cctx, cctx->cfd,
+ TEVENT_FD_READ, client_fd_handler, cctx);
+ if (!cctx->cfde) {
+ close(cctx->cfd);
+ talloc_free(cctx);
+ DEBUG(2, ("Failed to queue client handler on privileged pipe\n"));
+ }
+
+ cctx->ev = ev;
+ cctx->rctx = rctx;
+
+ talloc_set_destructor(cctx, client_destructor);
+
+ DEBUG(4, ("Client connected to privileged pipe!\n"));
+
+ return;
+}
+
+static void accept_fd_handler(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags, void *ptr)
+{
+ /* accept and attach new event handler */
+ struct resp_ctx *rctx = talloc_get_type(ptr, struct resp_ctx);
+ struct cli_ctx *cctx;
+ socklen_t len;
+
+ cctx = talloc_zero(rctx, struct cli_ctx);
+ if (!cctx) {
+ struct sockaddr_un addr;
+ int fd;
+ DEBUG(0, ("Out of memory trying to setup client context!\n"));
+ /* accept and close to signal the client we have a problem */
+ memset(&addr, 0, sizeof(addr));
+ len = sizeof(addr);
+ fd = accept(rctx->lfd, (struct sockaddr *)&addr, &len);
+ if (fd == -1) {
+ return;
+ }
+ close(fd);
+ return;
+ }
+
+ len = sizeof(cctx->addr);
+ cctx->cfd = accept(rctx->lfd, (struct sockaddr *)&cctx->addr, &len);
+ if (cctx->cfd == -1) {
+ DEBUG(1, ("Accept failed [%s]", strerror(errno)));
+ talloc_free(cctx);
+ return;
+ }
+
+ cctx->cfde = tevent_add_fd(ev, cctx, cctx->cfd,
+ TEVENT_FD_READ, client_fd_handler, cctx);
+ if (!cctx->cfde) {
+ close(cctx->cfd);
+ talloc_free(cctx);
+ DEBUG(2, ("Failed to queue client handler\n"));
+ }
+
+ cctx->ev = ev;
+ cctx->rctx = rctx;
+
+ talloc_set_destructor(cctx, client_destructor);
+
+ DEBUG(4, ("Client connected!\n"));
+
+ return;
+}
+
+static int sss_monitor_init(struct resp_ctx *rctx,
+ struct sbus_interface *intf,
+ const char *svc_name,
+ uint16_t svc_version)
+{
+ char *sbus_address;
+ int ret;
+
+ /* Set up SBUS connection to the monitor */
+ ret = monitor_get_sbus_address(rctx, &sbus_address);
+ if (ret != EOK) {
+ DEBUG(0, ("Could not locate monitor address.\n"));
+ return ret;
+ }
+
+ ret = sbus_client_init(rctx, rctx->ev, sbus_address,
+ intf, &rctx->mon_conn,
+ NULL, NULL);
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to connect to monitor services.\n"));
+ return ret;
+ }
+
+ /* Identify ourselves to the monitor */
+ ret = monitor_common_send_id(rctx->mon_conn, svc_name, svc_version);
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to identify to the monitor!\n"));
+ return ret;
+ }
+
+ return EOK;
+}
+
+static int sss_dp_init(struct resp_ctx *rctx,
+ struct sbus_interface *intf,
+ const char *cli_name,
+ struct sss_domain_info *domain)
+{
+ struct be_conn *be_conn;
+ int ret;
+
+ be_conn = talloc_zero(rctx, struct be_conn);
+ if (!be_conn) return ENOMEM;
+
+ be_conn->cli_name = cli_name;
+ be_conn->domain = domain;
+ be_conn->intf = intf;
+
+ /* Set up SBUS connection to the monitor */
+ ret = dp_get_sbus_address(be_conn, &be_conn->sbus_address, domain->name);
+ if (ret != EOK) {
+ DEBUG(0, ("Could not locate DP address.\n"));
+ return ret;
+ }
+ ret = sbus_client_init(rctx, rctx->ev,
+ be_conn->sbus_address,
+ intf, &be_conn->conn,
+ NULL, NULL);
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to connect to monitor services.\n"));
+ return ret;
+ }
+
+ DLIST_ADD_END(rctx->be_conns, be_conn, struct be_conn *);
+
+ /* Identify ourselves to the DP */
+ ret = dp_common_send_id(be_conn->conn,
+ DATA_PROVIDER_VERSION,
+ cli_name, domain->name);
+ if (ret != EOK) {
+ DEBUG(0, ("Failed to identify to the DP!\n"));
+ return ret;
+ }
+
+ return EOK;
+}
+
+/* create a unix socket and listen to it */
+static int set_unix_socket(struct resp_ctx *rctx)
+{
+ struct sockaddr_un addr;
+
+/* for future use */
+#if 0
+ char *default_pipe;
+ int ret;
+
+ default_pipe = talloc_asprintf(rctx, "%s/%s", PIPE_PATH,
+ rctx->sss_pipe_name);
+ if (!default_pipe) {
+ return ENOMEM;
+ }
+
+ ret = confdb_get_string(rctx->cdb, rctx,
+ rctx->confdb_socket_path, "unixSocket",
+ default_pipe, &rctx->sock_name);
+ if (ret != EOK) {
+ talloc_free(default_pipe);
+ return ret;
+ }
+ talloc_free(default_pipe);
+
+ default_pipe = talloc_asprintf(rctx, "%s/private/%s", PIPE_PATH,
+ rctx->sss_pipe_name);
+ if (!default_pipe) {
+ return ENOMEM;
+ }
+
+ ret = confdb_get_string(rctx->cdb, rctx,
+ rctx->confdb_socket_path, "privUnixSocket",
+ default_pipe, &rctx->priv_sock_name);
+ if (ret != EOK) {
+ talloc_free(default_pipe);
+ return ret;
+ }
+ talloc_free(default_pipe);
+#endif
+
+ if (rctx->sock_name != NULL ) {
+ rctx->lfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (rctx->lfd == -1) {
+ return EIO;
+ }
+
+ /* Set the umask so that permissions are set right on the socket.
+ * It must be readable and writable by anybody on the system. */
+ umask(0111);
+
+ set_nonblocking(rctx->lfd);
+ set_close_on_exec(rctx->lfd);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, rctx->sock_name, sizeof(addr.sun_path));
+
+ /* make sure we have no old sockets around */
+ unlink(rctx->sock_name);
+
+ if (bind(rctx->lfd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
+ DEBUG(0,("Unable to bind on socket '%s'\n", rctx->sock_name));
+ goto failed;
+ }
+ if (listen(rctx->lfd, 10) != 0) {
+ DEBUG(0,("Unable to listen on socket '%s'\n", rctx->sock_name));
+ goto failed;
+ }
+
+ rctx->lfde = tevent_add_fd(rctx->ev, rctx, rctx->lfd,
+ TEVENT_FD_READ, accept_fd_handler, rctx);
+ if (!rctx->lfde) {
+ DEBUG(0, ("Failed to queue handler on pipe\n"));
+ goto failed;
+ }
+ }
+
+ if (rctx->priv_sock_name != NULL ) {
+ /* create privileged pipe */
+ rctx->priv_lfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (rctx->priv_lfd == -1) {
+ close(rctx->lfd);
+ return EIO;
+ }
+
+ umask(0177);
+
+ set_nonblocking(rctx->priv_lfd);
+ set_close_on_exec(rctx->priv_lfd);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, rctx->priv_sock_name, sizeof(addr.sun_path));
+
+ unlink(rctx->priv_sock_name);
+
+ if (bind(rctx->priv_lfd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
+ DEBUG(0,("Unable to bind on socket '%s'\n", rctx->priv_sock_name));
+ goto failed;
+ }
+ if (listen(rctx->priv_lfd, 10) != 0) {
+ DEBUG(0,("Unable to listen on socket '%s'\n", rctx->priv_sock_name));
+ goto failed;
+ }
+
+ rctx->priv_lfde = tevent_add_fd(rctx->ev, rctx, rctx->priv_lfd,
+ TEVENT_FD_READ, accept_priv_fd_handler, rctx);
+ if (!rctx->priv_lfde) {
+ DEBUG(0, ("Failed to queue handler on privileged pipe\n"));
+ goto failed;
+ }
+ }
+
+ /* we want default permissions on created files to be very strict,
+ so set our umask to 0177 */
+ umask(0177);
+ return EOK;
+
+failed:
+ /* we want default permissions on created files to be very strict,
+ so set our umask to 0177 */
+ umask(0177);
+ close(rctx->lfd);
+ close(rctx->priv_lfd);
+ return EIO;
+}
+
+int sss_process_init(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct confdb_ctx *cdb,
+ struct sss_cmd_table sss_cmds[],
+ const char *sss_pipe_name,
+ const char *sss_priv_pipe_name,
+ const char *confdb_service_path,
+ const char *svc_name,
+ uint16_t svc_version,
+ struct sbus_interface *monitor_intf,
+ const char *cli_name,
+ struct sbus_interface *dp_intf,
+ struct resp_ctx **responder_ctx)
+{
+ struct resp_ctx *rctx;
+ struct sss_domain_info *dom;
+ int ret;
+
+ rctx = talloc_zero(mem_ctx, struct resp_ctx);
+ if (!rctx) {
+ DEBUG(0, ("fatal error initializing resp_ctx\n"));
+ return ENOMEM;
+ }
+ rctx->ev = ev;
+ rctx->cdb = cdb;
+ rctx->sss_cmds = sss_cmds;
+ rctx->sock_name = sss_pipe_name;
+ rctx->priv_sock_name = sss_priv_pipe_name;
+ rctx->confdb_service_path = confdb_service_path;
+
+ ret = confdb_get_domains(rctx->cdb, &rctx->domains);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error setting up domain map\n"));
+ return ret;
+ }
+
+ ret = sss_monitor_init(rctx, monitor_intf, svc_name, svc_version);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error setting up message bus\n"));
+ return ret;
+ }
+
+ for (dom = rctx->domains; dom; dom = dom->next) {
+
+ /* skip local domain, it doesn't have a backend */
+ if (strcasecmp(dom->provider, "local") == 0) {
+ continue;
+ }
+
+ ret = sss_dp_init(rctx, dp_intf, cli_name, dom);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error setting up backend connector\n"));
+ return ret;
+ }
+ }
+
+ ret = sysdb_init(rctx, ev, cdb, NULL, false, &rctx->db_list);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error initializing resp_ctx\n"));
+ return ret;
+ }
+
+ ret = sss_names_init(rctx, rctx->cdb, &rctx->names);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error initializing regex data\n"));
+ return ret;
+ }
+
+ /* after all initializations we are ready to listen on our socket */
+ ret = set_unix_socket(rctx);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error initializing socket\n"));
+ return ret;
+ }
+
+ DEBUG(1, ("Responder Initialization complete\n"));
+
+ *responder_ctx = rctx;
+ return EOK;
+}
+
+int sss_dp_get_domain_conn(struct resp_ctx *rctx, const char *domain,
+ struct be_conn **_conn)
+{
+ struct be_conn *iter;
+
+ if (!rctx->be_conns) return ENOENT;
+
+ for (iter = rctx->be_conns; iter; iter = iter->next) {
+ if (strcasecmp(domain, iter->domain->name) == 0) break;
+ }
+
+ if (!iter) return ENOENT;
+
+ *_conn = iter;
+
+ return EOK;
+}
+
generated by cgit (git 2.34.1) at 2024-04-19 06:26:15 +0000