[PATCH v2 2/2] procfs: Populate /proc/route with network routes

[Damien Zammit]

This exposes network routing table on /proc/route

---
 procfs/Makefile  |  2 +-
 procfs/rootdir.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/procfs/Makefile b/procfs/Makefile
index 13ee026c4..d32328d28 100644
--- a/procfs/Makefile
+++ b/procfs/Makefile
@@ -21,7 +21,7 @@ makemode := server

 target = procfs

-SRCS = procfs.c netfs.c procfs_dir.c process.c proclist.c rootdir.c dircat.c 
main.c mach_debugUser.c default_pagerUser.c
+SRCS = procfs.c netfs.c procfs_dir.c process.c proclist.c rootdir.c dircat.c 
main.c mach_debugUser.c default_pagerUser.c pfinetUser.c
 LCLHDRS = dircat.h main.h process.h procfs.h procfs_dir.h proclist.h rootdir.h

 OBJS = $(SRCS:.c=.o)
diff --git a/procfs/rootdir.c b/procfs/rootdir.c
index 0e7c05c00..deddaa43f 100644
--- a/procfs/rootdir.c
+++ b/procfs/rootdir.c
@@ -25,6 +25,7 @@
 #include <mach/default_pager.h>
 #include <mach_debug/mach_debug_types.h>
 #include <hurd/paths.h>
+#include <arpa/inet.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -37,8 +38,10 @@
 #include "procfs.h"
 #include "procfs_dir.h"
 #include "main.h"
+#include <net/route.h>

 #include "mach_debug_U.h"
+#include "pfinet_U.h"

 /* This implements a directory node with the static files in /proc.
    NB: the libps functions for host information return static storage;
@@ -408,6 +411,70 @@ out:
   return err;
 }

+static error_t
+rootdir_gc_route (void *hook, char **contents, ssize_t *contents_len)
+{
+  error_t err;
+  mach_port_t pfinet;
+  unsigned int i, len, buflen = 0;
+  char *src, *dst;
+  ifrtreq_t *r;
+  char dest[16], gw[16], mask[16];
+
+  char *inet_to_str(in_addr_t addr)
+  {
+    struct in_addr sin;
+
+    sin.s_addr = addr;
+    return inet_ntoa(sin);
+  }
+
+  pfinet = file_name_lookup (_SERVERS_SOCKET "/2", O_RDONLY, 0);
+  if (pfinet == MACH_PORT_NULL)
+    {
+      *contents_len = 0;
+      err = errno;
+      goto out;
+    }
+
+  err = pfinet_getroutes (pfinet, -1, &src, &buflen);
+  if (err)
+    {
+      *contents_len = 0;
+      goto out;
+    }
+
+  r = (ifrtreq_t *)src;
+  *contents_len = buflen / sizeof(ifrtreq_t) * 200 + 128;
+  *contents = calloc (1, *contents_len);
+  if (! *contents)
+    {
+      err = ENOMEM;
+      goto out;
+    }
+
+  dst = *contents;
+  sprintf(dst, "%-127s\n", "Iface\tDestination\tGateway\t 
Flags\tRefCnt\tUse\tMetric\tMask\t\tMTU\tWindow\tIRTT");
+  dst += 128;
+
+  for (i = 0; i < buflen / sizeof(ifrtreq_t); i++)
+    {
+      sprintf(dest, "%-15s", inet_to_str(r->rt_dest));
+      sprintf(gw,   "%-15s", inet_to_str(r->rt_gateway));
+      sprintf(mask, "%-15s", inet_to_str(r->rt_mask));
+
+      len = sprintf(dst, "%s\t%s\t%s\t%04X\t%d\t%u\t%d\t%s\t%d\t%u\t%u\n",
+                   r->ifname, dest, gw, r->rt_flags, 0, 0,
+                   r->rt_metric, mask, r->rt_mtu, r->rt_window, r->rt_irtt);
+      dst += len;
+      r++;
+    }
+
+out:
+  mach_port_deallocate (mach_task_self (), pfinet);
+  return err;
+}
+
 static struct node *rootdir_self_node;
 static struct node *rootdir_mounts_node;

@@ -780,6 +847,13 @@ static const struct procfs_dir_entry rootdir_entries[] = {
       .cleanup_contents = procfs_cleanup_contents_with_free,
     },
   },
+  {
+    .name = "route",
+    .hook = & (struct procfs_node_ops) {
+      .get_contents = rootdir_gc_route,
+      .cleanup_contents = procfs_cleanup_contents_with_free,
+    },
+  },
   {
     .name = "mounts",
     .hook = ROOTDIR_DEFINE_TRANSLATED_NODE (&rootdir_mounts_node,
--
2.34.1