babeld: merge kernel_zebra.c into kernel.c.

In upstream babel, we include different kernel_foo files depending on the
platform we compile for.  In Quagga, this is not needed, and it avoids
tricky autotools issues.  (All autotools issues are tricky.)

[David: without this commit, build breaks.]

From: Juliusz Chroboczek <jch@pps.jussieu.fr>
Signed-off-by: David Lamparter <equinox@diac24.net>

1 files changed, 239 insertions, 1 deletions

diff --git a/babeld/kernel.c b/babeld/kernel.c
index c31f617b8..efbb70005 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. */