74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*
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Copyright (c) 2013, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "babel.h"
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#include "neigh.h"
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#include "packet.h"
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#include "tlv.h"
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#include "tlv_types.h"
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static void add_ihus(gmrf_t *gmrf, gp_babel_packet_t *packet, size_t max_len, const gp_babel_iface_t *iface) {
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const gp_babel_neigh_t *neigh;
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for (neigh = iface->neighbours; neigh; neigh = neigh->next) {
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gp_babel_tlv_ihu_t *ihu = gp_babel_tlv_add(packet, GP_BABEL_PACKET_MAX, TLV_IHU, sizeof(gp_babel_tlv_ihu_t)+sizeof(gmrf_addr_t));
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if (!ihu)
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return;
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ihu->ae = ADDR_ENC_GMRF;
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ihu->reserved = 0;
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ihu->rxcost = htons(gp_babel_neigh_get_rxcost(gmrf, neigh));
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ihu->interval = htons(GP_BABEL_IHU_INTERVAL);
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memcpy(ihu->address, &neigh->addr, sizeof(gmrf_addr_t));
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}
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}
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void gp_babel_send_hellos(gmrf_t *gmrf, gmrf_context_t *ctx) {
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gmrf_logf(gmrf, LOG_DEBUG, "sending hellos...");
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gp_babel_packet_t *packet = alloca_packet(GP_BABEL_PACKET_MAX);
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gp_babel_tlv_hello_t *hello = gp_babel_tlv_add(packet, GP_BABEL_PACKET_MAX, TLV_HELLO, sizeof(gp_babel_tlv_hello_t));
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if (!hello)
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return;
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hello->reserved = 0;
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hello->interval = htons(GP_BABEL_HELLO_INTERVAL);
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uint16_t len = packet->len;
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gp_babel_iface_t *iface;
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for (iface = ctx->interfaces; iface; iface = iface->next) {
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hello->seqno = htons(iface->seqno++);
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packet->len = len;
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add_ihus(gmrf, packet, GP_BABEL_PACKET_MAX, iface);
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gmrf_iface_send_bc(gmrf, iface->gmrf_iface, packet, gp_babel_packet_size(packet));
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}
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}
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