pimd: merge pimd as of 2015-01-19

Welcome pimd to the Quagga daemon zoo!

This is a merge of commit 77ae369 ("pimd: Log ifindex found for an
interface when zebra lib reports a new connected address."), with
the intermediate "reconnect" changes removed (c9adf00...d274381).
d274381 is replaced with b162ab7, which includes some changes.  In
addition, 4 reconnect-related changes and 1 cosmetic one have been
bumped out.

The rebase command used to produce the branch that is merged here is:
  git rebase --onto b162ab7 c9adf00 77ae369

Note that 3 patches had their author rewritten from
    "Anonymous SR#108542 <>" (which is not a valid git author ID)
to: "Savannah SR#108542 <nbahr@atcorp.com>" (which is the e-mail address
                               listed in the associated Savannah ticket)

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 106 insertions, 0 deletions

diff --git a/pimd/pim_msg.c b/pimd/pim_msg.c
new file mode 100644
index 0000000000..8ead7ce643
--- /dev/null
+++ b/pimd/pim_msg.c
@@ -0,0 +1,106 @@
+/*
+  PIM for Quagga
+  Copyright (C) 2008  Everton da Silva Marques
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with this program; see the file COPYING; if not, write to the
+  Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+  MA 02110-1301 USA
+  
+  $QuaggaId: $Format:%an, %ai, %h$ $
+*/
+
+#include <zebra.h>
+
+#include "pimd.h"
+#include "pim_pim.h"
+#include "pim_msg.h"
+#include "pim_util.h"
+
+void pim_msg_build_header(uint8_t *pim_msg, int pim_msg_size,
+			  uint8_t pim_msg_type)
+{
+  uint16_t checksum;
+
+  zassert(pim_msg_size >= PIM_PIM_MIN_LEN);
+
+  /*
+   * Write header
+   */
+
+  *(uint8_t *) PIM_MSG_HDR_OFFSET_VERSION(pim_msg) = (PIM_PROTO_VERSION << 4) | pim_msg_type;
+  *(uint8_t *) PIM_MSG_HDR_OFFSET_RESERVED(pim_msg) = 0;
+
+  /*
+   * Compute checksum
+   */
+
+  *(uint16_t *) PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg) = 0;
+  checksum = in_cksum(pim_msg, pim_msg_size);
+  *(uint16_t *) PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg) = checksum;
+}
+
+uint8_t *pim_msg_addr_encode_ipv4_ucast(uint8_t *buf,
+					int buf_size,
+					struct in_addr addr)
+{
+  const int ENCODED_IPV4_UCAST_SIZE = 6;
+
+  if (buf_size < ENCODED_IPV4_UCAST_SIZE) {
+    return 0;
+  }
+
+  buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
+  buf[1] = '\0';    /* native encoding */
+  memcpy(buf+2, &addr, sizeof(struct in_addr));
+
+  return buf + ENCODED_IPV4_UCAST_SIZE;
+}
+
+uint8_t *pim_msg_addr_encode_ipv4_group(uint8_t *buf,
+					int buf_size,
+					struct in_addr addr)
+{
+  const int ENCODED_IPV4_GROUP_SIZE = 8;
+
+  if (buf_size < ENCODED_IPV4_GROUP_SIZE) {
+    return 0;
+  }
+
+  buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
+  buf[1] = '\0';    /* native encoding */
+  buf[2] = '\0';    /* reserved */
+  buf[3] = 32;      /* mask len */
+  memcpy(buf+4, &addr, sizeof(struct in_addr));
+
+  return buf + ENCODED_IPV4_GROUP_SIZE;
+}
+
+uint8_t *pim_msg_addr_encode_ipv4_source(uint8_t *buf,
+					 int buf_size,
+					 struct in_addr addr)
+{
+  const int ENCODED_IPV4_SOURCE_SIZE = 8;
+
+  if (buf_size < ENCODED_IPV4_SOURCE_SIZE) {
+    return 0;
+  }
+
+  buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
+  buf[1] = '\0';    /* native encoding */
+  buf[2] = 4;       /* reserved = 0 | S bit = 1 | W bit = 0 | R bit = 0 */
+  buf[3] = 32;      /* mask len */
+  memcpy(buf+4, &addr, sizeof(struct in_addr));
+
+  return buf + ENCODED_IPV4_SOURCE_SIZE;
+}