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-rw-r--r--babeld/kernel.c240
1 files changed, 239 insertions, 1 deletions
diff --git a/babeld/kernel.c b/babeld/kernel.c
index c31f617b..efbb7000 100644
--- a/babeld/kernel.c
+++ b/babeld/kernel.c
@@ -17,6 +17,7 @@
*
Copyright 2007, 2008 by Grégoire Henry, Julien Cristau and Juliusz Chroboczek
+Copyright 2011, 2012 by Matthieu Boutier and Juliusz Chroboczek
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
@@ -43,7 +44,244 @@ THE SOFTWARE.
#include "babeld.h"
-#include "kernel_zebra.c"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+
+#include <zebra.h>
+#include "prefix.h"
+#include "zclient.h"
+#include "kernel.h"
+#include "privs.h"
+#include "command.h"
+#include "vty.h"
+#include "memory.h"
+#include "thread.h"
+
+#include "util.h"
+#include "babel_interface.h"
+#include "babel_zebra.h"
+
+
+static int
+kernel_route_v4(int add, const unsigned char *pref, unsigned short plen,
+ const unsigned char *gate, int ifindex,
+ unsigned int metric);
+static int
+kernel_route_v6(int add, const unsigned char *pref, unsigned short plen,
+ const unsigned char *gate, int ifindex,
+ unsigned int metric);
+
+int
+kernel_interface_operational(struct interface *interface)
+{
+ return if_is_operative(interface);
+}
+
+int
+kernel_interface_mtu(struct interface *interface)
+{
+ return MIN(interface->mtu, interface->mtu6);
+}
+
+int
+kernel_interface_wireless(struct interface *interface)
+{
+ return 0;
+}
+
+int
+kernel_route(int operation, const unsigned char *pref, unsigned short plen,
+ const unsigned char *gate, int ifindex, unsigned int metric,
+ const unsigned char *newgate, int newifindex,
+ unsigned int newmetric)
+{
+ int rc;
+ int ipv4;
+
+ /* Check that the protocol family is consistent. */
+ if(plen >= 96 && v4mapped(pref)) {
+ if(!v4mapped(gate)) {
+ errno = EINVAL;
+ return -1;
+ }
+ ipv4 = 1;
+ } else {
+ if(v4mapped(gate)) {
+ errno = EINVAL;
+ return -1;
+ }
+ ipv4 = 0;
+ }
+
+ switch (operation) {
+ case ROUTE_ADD:
+ return ipv4 ?
+ kernel_route_v4(1, pref, plen, gate, ifindex, metric):
+ kernel_route_v6(1, pref, plen, gate, ifindex, metric);
+ break;
+ case ROUTE_FLUSH:
+ return ipv4 ?
+ kernel_route_v4(0, pref, plen, gate, ifindex, metric):
+ kernel_route_v6(0, pref, plen, gate, ifindex, metric);
+ break;
+ case ROUTE_MODIFY:
+ if(newmetric == metric && memcmp(newgate, gate, 16) == 0 &&
+ newifindex == ifindex)
+ return 0;
+ debugf(BABEL_DEBUG_ROUTE, "Modify route: delete old; add new.");
+ rc = ipv4 ?
+ kernel_route_v4(0, pref, plen, gate, ifindex, metric):
+ kernel_route_v6(0, pref, plen, gate, ifindex, metric);
+
+ if (rc < 0)
+ return -1;
+
+ rc = ipv4 ?
+ kernel_route_v4(1, pref, plen, newgate, newifindex, newmetric):
+ kernel_route_v6(1, pref, plen, newgate, newifindex, newmetric);
+
+ return rc;
+ break;
+ default:
+ zlog_err("this should never appens (false value - kernel_route)");
+ assert(0);
+ exit(1);
+ break;
+ }
+}
+
+static int
+kernel_route_v4(int add,
+ const unsigned char *pref, unsigned short plen,
+ const unsigned char *gate, int ifindex, unsigned int metric)
+{
+ struct zapi_ipv4 api; /* quagga's communication system */
+ struct prefix_ipv4 quagga_prefix; /* quagga's prefix */
+ struct in_addr babel_prefix_addr; /* babeld's prefix addr */
+ struct in_addr nexthop; /* next router to go */
+ struct in_addr *nexthop_pointer = &nexthop; /* it's an array! */
+
+ /* convert to be understandable by quagga */
+ /* convert given addresses */
+ uchar_to_inaddr(&babel_prefix_addr, pref);
+ uchar_to_inaddr(&nexthop, gate);
+
+ /* make prefix structure */
+ memset (&quagga_prefix, 0, sizeof(quagga_prefix));
+ quagga_prefix.family = AF_INET;
+ IPV4_ADDR_COPY (&quagga_prefix.prefix, &babel_prefix_addr);
+ quagga_prefix.prefixlen = plen - 96; /* our plen is for v4mapped's addr */
+ apply_mask_ipv4(&quagga_prefix);
+
+ api.type = ZEBRA_ROUTE_BABEL;
+ api.flags = 0;
+ api.message = 0;
+ api.safi = SAFI_UNICAST;
+
+ /* Unlike the native Linux and BSD interfaces, Quagga doesn't like
+ there to be both and IPv4 nexthop and an ifindex. Omit the
+ ifindex, and assume that the connected prefixes be set up
+ correctly. */
+
+ SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
+ api.ifindex_num = 0;
+ if(metric >= KERNEL_INFINITY) {
+ api.flags = ZEBRA_FLAG_BLACKHOLE;
+ api.nexthop_num = 0;
+ } else {
+ api.nexthop_num = 1;
+ api.nexthop = &nexthop_pointer;
+ SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
+ api.metric = metric;
+ }
+
+ debugf(BABEL_DEBUG_ROUTE, "%s route (ipv4) to zebra",
+ add ? "adding" : "removing" );
+ return zapi_ipv4_route (add ? ZEBRA_IPV4_ROUTE_ADD :
+ ZEBRA_IPV4_ROUTE_DELETE,
+ zclient, &quagga_prefix, &api);
+}
+
+static int
+kernel_route_v6(int add, const unsigned char *pref, unsigned short plen,
+ const unsigned char *gate, int ifindex, unsigned int metric)
+{
+ unsigned int tmp_ifindex = ifindex; /* (for typing) */
+ struct zapi_ipv6 api; /* quagga's communication system */
+ struct prefix_ipv6 quagga_prefix; /* quagga's prefix */
+ struct in6_addr babel_prefix_addr; /* babeld's prefix addr */
+ struct in6_addr nexthop; /* next router to go */
+ struct in6_addr *nexthop_pointer = &nexthop;
+
+ /* convert to be understandable by quagga */
+ /* convert given addresses */
+ uchar_to_in6addr(&babel_prefix_addr, pref);
+ uchar_to_in6addr(&nexthop, gate);
+
+ /* make prefix structure */
+ memset (&quagga_prefix, 0, sizeof(quagga_prefix));
+ quagga_prefix.family = AF_INET6;
+ IPV6_ADDR_COPY (&quagga_prefix.prefix, &babel_prefix_addr);
+ quagga_prefix.prefixlen = plen;
+ apply_mask_ipv6(&quagga_prefix);
+
+ api.type = ZEBRA_ROUTE_BABEL;
+ api.flags = 0;
+ api.message = 0;
+ api.safi = SAFI_UNICAST;
+ SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
+ if(metric >= KERNEL_INFINITY) {
+ api.flags = ZEBRA_FLAG_BLACKHOLE;
+ api.nexthop_num = 0;
+ api.ifindex_num = 0;
+ } else {
+ api.nexthop_num = 1;
+ api.nexthop = &nexthop_pointer;
+ SET_FLAG(api.message, ZAPI_MESSAGE_IFINDEX);
+ api.ifindex_num = 1;
+ api.ifindex = &tmp_ifindex;
+ SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
+ api.metric = metric;
+ }
+
+ debugf(BABEL_DEBUG_ROUTE, "%s route (ipv6) to zebra",
+ add ? "adding" : "removing" );
+ return zapi_ipv6_route (add ? ZEBRA_IPV6_ROUTE_ADD :
+ ZEBRA_IPV6_ROUTE_DELETE,
+ zclient, &quagga_prefix, &api);
+}
+
+int
+if_eui64(char *ifname, int ifindex, unsigned char *eui)
+{
+ struct interface *ifp = if_lookup_by_index(ifindex);
+ if (ifp == NULL) {
+ return -1;
+ }
+#ifdef HAVE_STRUCT_SOCKADDR_DL
+ u_char len = ifp->sdl.sdl_alen;
+ char *tmp = ifp->sdl.sdl_data + ifp->sdl.sdl_nlen;
+#else
+ u_char len = (u_char) ifp->hw_addr_len;
+ char *tmp = (void*) ifp->hw_addr;
+#endif
+ if (len == 8) {
+ memcpy(eui, tmp, 8);
+ eui[0] ^= 2;
+ } else if (len == 6) {
+ memcpy(eui, tmp, 3);
+ eui[3] = 0xFF;
+ eui[4] = 0xFE;
+ memcpy(eui+5, tmp+3, 3);
+ } else {
+ return -1;
+ }
+ return 0;
+}
/* Like gettimeofday, but returns monotonic time. If POSIX clocks are not
available, falls back to gettimeofday but enforces monotonicity. */
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-05 02:14:19 +0000