Adding the capability to run netipmid outside of systemd

Currently, this application relies upon systemd handing it a socket from
the phosphor-ipmi-net.socket file. If for whatever reason, you want to
run this application manually (perhaps debugging), it needs to create its own socket.

This should have no affect on the normal operation of netipmid.

Change-Id: I4e46b586b09cb57d5ef1d2fd0e216552da388381
Signed-off-by: David Cobbley <david.j.cobbley@linux.intel.com>

1 files changed, 31 insertions, 3 deletions

diff --git a/sd_event_loop.cpp b/sd_event_loop.cpp
index 0d8b323..16a5403 100644
--- a/sd_event_loop.cpp
+++ b/sd_event_loop.cpp
@@ -1,4 +1,6 @@
+#include <netinet/in.h>
 #include <sys/ioctl.h>
+#include <sys/socket.h>
 #include <systemd/sd-daemon.h>
 #include <phosphor-logging/log.hpp>
 #include "main.hpp"
@@ -173,6 +175,7 @@ int EventLoop::startEventLoop()
 {
     int fd = -1;
     int r = 0;
+    int listen_fd;
     sigset_t ss;
     sd_event_source* source = nullptr;
     auto bus = ipmid_get_sd_bus_connection();
@@ -218,13 +221,38 @@ int EventLoop::startEventLoop()
         goto finish;
     }
 
-    if (sd_listen_fds(0) != 1)
+    //Create our own socket if SysD did not supply one.
+    listen_fd = sd_listen_fds(0);
+    if (listen_fd == 1)
     {
-        log<level::ERR>("No or too many file descriptors received");
+        fd = SD_LISTEN_FDS_START;
+    }
+    else if (listen_fd > 1)
+    {
+        log<level::ERR>("Too many file descriptors received");
         goto finish;
     }
+    else
+    {
+        struct sockaddr_in address;
+        if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == 0)
+        {
+            r = -errno;
+            log<level::ERR>("Unable to manually open socket");
+            goto finish;
+        }
 
-    fd = SD_LISTEN_FDS_START;
+        address.sin_family = AF_INET;
+        address.sin_addr.s_addr = INADDR_ANY;
+        address.sin_port = htons(IPMI_STD_PORT);
+
+        if (bind(fd, (struct sockaddr *)&address, sizeof(address)) < 0)
+        {
+            r = -errno;
+            log<level::ERR>("Unable to bind socket");
+            goto finish;
+        }
+    }
 
     r = sd_event_add_io(event, &source, fd, EPOLLIN, udp623Handler, nullptr);
     if (r < 0)