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socket: introduce SELinuxLabelViaNet option

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This makes possible to spawn service instances triggered by socket with
MLS/MCS SELinux labels which are created based on information provided by
connected peer.

Implementation of label_get_child_label derived from xinetd.

Reviewed-by: Paul Moore <pmoore@redhat.com>
This commit is contained in:
Michal Sekletar
2014-08-19 18:57:12 +02:00
parent 6c3e68e7c1
commit cf8bd44339
8 changed files with 127 additions and 5 deletions
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src/core/socket.c
+19 -3
View File
@@ -31,6 +31,10 @@
#include <mqueue.h>
#include <sys/xattr.h>
#ifdef HAVE_SELINUX
#include <selinux/selinux.h>
#endif
#include "sd-event.h"
#include "log.h"
#include "load-dropin.h"
@@ -488,7 +492,8 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
"%sPassCredentials: %s\n"
"%sPassSecurity: %s\n"
"%sTCPCongestion: %s\n"
"%sRemoveOnStop: %s\n",
"%sRemoveOnStop: %s\n"
"%sSELinuxLabelViaNet: %s\n",
prefix, socket_state_to_string(s->state),
prefix, socket_result_to_string(s->result),
prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
@@ -503,7 +508,8 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
prefix, yes_no(s->pass_cred),
prefix, yes_no(s->pass_sec),
prefix, strna(s->tcp_congestion),
prefix, yes_no(s->remove_on_stop));
prefix, yes_no(s->remove_on_stop),
prefix, yes_no(s->selinux_label_via_net));
if (s->control_pid > 0)
fprintf(f,
@@ -1130,7 +1136,14 @@ static int socket_open_fds(Socket *s) {
continue;
if (p->type == SOCKET_SOCKET) {
#ifdef HAVE_SELINUX
if (!know_label && s->selinux_label_via_net) {
r = getcon(&label);
if (r < 0)
return r;
know_label = true;
}
#endif
if (!know_label) {
r = socket_instantiate_service(s);
@@ -1829,6 +1842,9 @@ static void socket_enter_running(Socket *s, int cfd) {
cfd = -1;
s->n_connections ++;
if (s->selinux_label_via_net)
service->exec_context.selinux_label_via_net = true;
r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL);
if (r < 0)
goto fail;