*: Initial Import of Babeld into FRR

This is a direct copy of:
https://github.com/boutier/quagga-merge

From the branch babel-merge

I copied the babeld directory into FRR and then fixed up everything to
compile.

Babeld at this point in time when run will more than likely crash and burn
in it's interfactions with zebra.

I might have messed up the cli, which will need to be looked at

extract.pl.in and vtysh.c need to be fixed up.  Additionally we probably
need to work on DEFUN_NOSH conversion in babeld as well

This code comes from:
Matthieu Boutier <boutier@irif.fr>
Juliusz Chroboczek <jch@irif.fr>

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 296 insertions, 0 deletions

diff --git a/babeld/kernel.c b/babeld/kernel.c
new file mode 100644
index 0000000000..a0c21833b9
--- /dev/null
+++ b/babeld/kernel.c
@@ -0,0 +1,296 @@
+/*
+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
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include <sys/time.h>
+#include <sys/param.h>
+#include <time.h>
+
+#include "babeld.h"
+
+
+#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_REJECT;
+        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)
+{
+    ifindex_t 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;
+    if(metric >= KERNEL_INFINITY) {
+        api.flags = ZEBRA_FLAG_REJECT;
+        api.nexthop_num = 0;
+        api.ifindex_num = 0;
+    } else {
+        SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
+        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, NULL, &api);
+}
+
+int
+if_eui64(char *ifname, int ifindex, unsigned char *eui)
+{
+    struct interface *ifp = if_lookup_by_index(ifindex, VRF_DEFAULT);
+    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. */
+int
+gettime(struct timeval *tv)
+{
+    return monotime(tv);
+}
+
+/* If /dev/urandom doesn't exist, this will fail with ENOENT, which the
+   caller will deal with gracefully. */
+
+int
+read_random_bytes(void *buf, size_t len)
+{
+    int fd;
+    int rc;
+
+    fd = open("/dev/urandom", O_RDONLY);
+    if(fd < 0) {
+        rc = -1;
+    } else {
+        rc = read(fd, buf, len);
+        if(rc < 0 || (unsigned) rc < len)
+            rc = -1;
+        close(fd);
+    }
+    return rc;
+}