---
hurd/pfinet.defs | 10 ++++++++
pfinet/pfinet-ops.c | 56 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+)
diff --git a/hurd/pfinet.defs b/hurd/pfinet.defs
index ec0b03e34..a6000142e 100644
--- a/hurd/pfinet.defs
+++ b/hurd/pfinet.defs
@@ -37,3 +37,13 @@ routine pfinet_siocgifconf (
amount: vm_size_t;
out buf: data_t, dealloc
);
+
+/* Return the routing table as a char buffer.
+ The maximum number of bytes returned can be given in AMOUNT,
+ which will be truncated to the nearest row of the table.
+ But if AMOUNT is -1, all routes will be returned up to MAX_ROUTES. */
+routine pfinet_getroutes (
+ port: io_t;
+ amount: vm_size_t;
+ out buf: data_t, dealloc
+);
diff --git a/pfinet/pfinet-ops.c b/pfinet/pfinet-ops.c
index 5db669783..cf4050cf7 100644
--- a/pfinet/pfinet-ops.c
+++ b/pfinet/pfinet-ops.c
@@ -20,6 +20,7 @@
#include "pfinet.h"
+#define _HACK_ERRNO_H
#include <linux/netdevice.h>
#include <linux/notifier.h>
@@ -28,12 +29,15 @@
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
+#include <errno.h>
#include <mach/notify.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <net/if.h>
+#define MAX_ROUTES 255
+
extern int dev_ifconf(char *arg);
/* Return the list of devices in the format provided by SIOCGIFCONF
@@ -91,3 +95,55 @@ S_pfinet_siocgifconf (io_t port,
pthread_mutex_unlock (&global_lock);
return err;
}
+
+/* Return the routing table as a char buffer
+ in routes, but don't return more then AMOUNT bytes.
+ If AMOUNT is -1, we get the needed length. */
+error_t
+S_pfinet_getroutes (io_t port,
+ vm_size_t amount,
+ data_t *routes,
+ mach_msg_type_number_t *len)
+{
+ error_t err = 0;
+ char rs[(MAX_ROUTES + 1) * 128];
+ int n;
+ char *buf;
+
+ pthread_mutex_lock (&global_lock);
+ if (amount == (vm_size_t) -1)
+ {
+ /* Get the needed buffer length. */
+ n = get_routing_table (rs, 0, MAX_ROUTES);
+ amount = (n + 1) * 128;
+ }
+ else
+ n = amount / 128;
+
+ if (amount > 0)
+ {
+ /* Possibly allocate a new buffer. */
+ if (*len < amount)
+ buf = (char *) mmap (0, amount, PROT_READ|PROT_WRITE,
+ MAP_ANON, 0, 0);
+ else
+ buf = *routes;
+ n = get_routing_table (buf, 0, n);
+ }
+
+ if (buf == MAP_FAILED)
+ {
+ err = errno;
+ *len = 0;
+ if (buf != *routes)
+ munmap (buf, amount);
+ }
+ else
+ {
+ *len = (n + 1) * 128;
+ *routes = buf;
+ }
+
+ pthread_mutex_unlock (&global_lock);
+ return err;
+}
--
2.34.1
