diff options
Diffstat (limited to 'sample/udld.c')
| -rw-r--r-- | sample/udld.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/sample/udld.c b/sample/udld.c new file mode 100644 index 0000000..d6bec90 --- /dev/null +++ b/sample/udld.c @@ -0,0 +1,159 @@ +#include <stdint.h> +#if (HAVE_CONFIG_H) +#include "../include/config.h" +#endif +#include "./libnet_test.h" + +#include <assert.h> + +#define DEVICE_NAME "lo" + +int +main(int argc, char *argv[]) +{ + (void)argc; /* unused */ + + int c; + libnet_t *l; + libnet_ptag_t t; + char errbuf[LIBNET_ERRBUF_SIZE]; + size_t udld_payload_size = 0; + + l = libnet_init(LIBNET_LINK, DEVICE_NAME, errbuf); + if (l == NULL) + { + fprintf(stderr, "libnet_init() failed: %s", errbuf); + return (EXIT_FAILURE); + } + + /* [TLV SEQUENCE NUMBER ]*/ + const uint32_t sequence_number = 1; + t = libnet_build_udld_sequence_number((const uint8_t *)&sequence_number, l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Sequence Number TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint32_t)); + + /* [TLV DEVICE NAME ]*/ + const char *device_name_str = "S1"; + t = libnet_build_udld_device_name((const uint8_t *)device_name_str, strlen(device_name_str), l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Device Name TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_name_str)); + + /* [TLV TIMEOUT INTERVAL ]*/ + const uint8_t timeout_interval = 5; + t = libnet_build_udld_timeout_interval(&timeout_interval, l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Timeout Interval TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t)); + + /* [TLV MESSAGE INTERVAL ]*/ + const uint8_t message_interval = 7; + t = libnet_build_udld_message_interval(&message_interval, l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Message Interval TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t)); + + /* [ TLV ECHO ] */ + const uint8_t echo_id_pairs[] = {0x0, 0x0, 0x0, 0x0}; + t = libnet_build_udld_echo(echo_id_pairs, (sizeof(echo_id_pairs)/sizeof(echo_id_pairs[0])), l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Echo TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + (sizeof(echo_id_pairs)/sizeof(echo_id_pairs[0]))); + + /* [ TLV PORT ID ] */ + const char *port_id_str = "Gi0/1"; + t = libnet_build_udld_port_id((const uint8_t *)port_id_str, strlen(port_id_str), l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Port ID TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(port_id_str)); + + /* [ TLV DEVICE ID ] */ + const char *device_id_str = "FOC1031Z7JG"; + t = libnet_build_udld_device_id((const uint8_t *)device_id_str, strlen(device_id_str), l, 0); + if (t == (-1)) + { + fprintf(stderr, "Cannot build UDLD Device ID TLV: %s\n", libnet_geterror(l)); + goto bad; + } + udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_id_str)); + + assert((udld_payload_size == 56) && "Incorrect UDLD payload size\n"); + + int flags = (LIBNET_UDLD_FLAG_RT | LIBNET_UDLD_FLAG_RSY); + t = libnet_build_udld_hdr(LIBNET_UDLD_PDU_VERSION, /* version */ + LIBNET_UDLD_PDU_OPCODE_PROBE, /* opcode */ + flags, /* flags */ + 0, /* checksum */ + NULL, /* payload */ + 0, /* payload_s */ + l, 0); + if (t == -1) + { + fprintf(stderr, "Can't build UDLD: %s\n", libnet_geterror(l)); + goto bad; + } + + uint8_t OUI[3] = LIBNET_UDLD_OID; + t = libnet_build_802_2snap(0xAA, /* DSAP */ + 0xAA, /* SSAP */ + 0x03, /* Control */ + OUI, /* OUI */ + LIBNET_UDLD_HDLC_PROTO_TYPE, /* Type */ + NULL, /* Payload */ + 0, /* Payload_s */ + l, + 0); + + uint8_t udld_dst_mac[6] = LIBNET_UDLD_DEST_MAC; + uint8_t udld_src_mac_dummy[6] = { 0x00, 0x19, 0x06, 0xEA, 0xB8, 0x81 }; + t = libnet_build_802_3(udld_dst_mac, /* ethernet destination */ + udld_src_mac_dummy, /* ethernet source */ + LIBNET_802_2SNAP_H + /* */ + LIBNET_UDLD_H + udld_payload_size, /* */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet context */ + 0); /* libnet ptag */ + if (t == -1) + { + fprintf(stderr, "Can't build 802.3 header: %s\n", libnet_geterror(l)); + goto bad; + } + + /* write the packet out */ + c = libnet_write(l); + if (c == -1) + { + fprintf(stderr, "Write error: %s\n", libnet_geterror(l)); + goto bad; + } + else + { + fprintf(stderr, "Wrote %d byte LLDP frame \"%s\"\n", c, argv[2]); + } + + libnet_destroy(l); + return (EXIT_SUCCESS); + bad: + libnet_destroy(l); + return (EXIT_FAILURE); +} |