89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
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/*
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* lldp.c - send LLDP frames
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*
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* Copyright (C) 2014 Holger Hans Peter Freyther
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*/
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#include <common.h>
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#include <command.h>
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#include <complete.h>
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#include <net.h>
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static int do_lldp(int argc, char **argv)
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{
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static uint8_t lldp_mult[] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e };
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static char *lldp_packet, *data, *start;
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struct eth_device *edev = eth_get_current();
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struct ethernet *et;
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int ret;
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if (!edev)
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return -ENETDOWN;
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if (!is_valid_ether_addr(edev->ethaddr)) {
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char str[sizeof("xx:xx:xx:xx:xx:xx")];
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random_ether_addr(edev->ethaddr);
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ethaddr_to_string(edev->ethaddr, str);
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printf("warning: No MAC address set. Using random address %s\n", str);
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dev_set_param(&edev->dev, "ethaddr", str);
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}
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if (!lldp_packet) {
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lldp_packet = net_alloc_packet();
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if (!lldp_packet)
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return -ENOMEM;
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}
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et = (struct ethernet *)lldp_packet;
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memcpy(et->et_src, edev->ethaddr, 6);
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memcpy(et->et_dest, lldp_mult, 6);
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et->et_protlen = htons(0x88cc);
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data = start = lldp_packet + ETHER_HDR_SIZE;
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/* chassis id */
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*data++ = 0x02;
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*data++ = 0x06;
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*data++ = 0x05;
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*data++ = 0x00;
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*data++ = 0x00;
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*data++ = 0x00;
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*data++ = 0x00;
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*data++ = 0x00;
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/* port id */
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*data++ = 0x04;
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*data++ = 0x02;
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*data++ = 0x07;
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*data++ = 0x5A;
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/* TTL */
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*data++ = 0x06;
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*data++ = 0x02;
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*data++ = 0x00;
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*data++ = 0xb4;
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/* end */
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*data++ = 0x00;
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*data++ = 0x00;
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ret = eth_send(edev, lldp_packet, ETHER_HDR_SIZE + (data-start));
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if (ret)
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return ret;
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return 0;
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}
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BAREBOX_CMD_HELP_START(lldp)
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(lldp)
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.cmd = do_lldp,
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BAREBOX_CMD_DESC("Send LLDP multicast packet")
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BAREBOX_CMD_OPTS("[]")
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BAREBOX_CMD_GROUP(CMD_GRP_NET)
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BAREBOX_CMD_HELP(cmd_lldp_help)
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BAREBOX_CMD_COMPLETE(empty_complete)
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BAREBOX_CMD_END
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