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#include "common.h"
#include <assert.h>
static libnet_ptag_t
internal_build_udld_tlv(const uint16_t tlv_type, const uint8_t *value,
const uint8_t value_s, libnet_t * l, libnet_ptag_t ptag)
{
struct libnet_udld_hdr hdr;
uint32_t n, h;
libnet_pblock_t *p;
hdr.tlv__type = tlv_type;
hdr.tlv__length = LIBNET_UDLD_TLV_HDR_SIZE + value_s;
uint32_t host_type_and_len = 0;
host_type_and_len |= (hdr.tlv__type << 16);
host_type_and_len |= (hdr.tlv__length);
uint32_t network_type_and_len = htonl(host_type_and_len);
n = h = LIBNET_UDLD_TLV_HDR_SIZE + value_s;
uint8_t pblock_type = 0;
uint8_t value_type = 0;
switch(tlv_type)
{
case LIBNET_UDLD_DEVICE_ID:
pblock_type = LIBNET_PBLOCK_UDLD_DEVICE_ID_H;
value_type = LIBNET_UDLD_VALUE_TYPE_ASCII;
break;
case LIBNET_UDLD_PORT_ID:
pblock_type = LIBNET_PBLOCK_UDLD_PORT_ID_H;
value_type = LIBNET_UDLD_VALUE_TYPE_ASCII;
break;
case LIBNET_UDLD_ECHO:
pblock_type = LIBNET_PBLOCK_UDLD_ECHO_H;
value_type = LIBNET_UDLD_VALUE_TYPE_ID_PAIRS;
break;
case LIBNET_UDLD_MESSAGE_INTERVAL:
pblock_type = LIBNET_PBLOCK_UDLD_MSG_INTERVAL_H;
value_type = LIBNET_UDLD_VALUE_TYPE_8_BIT_UINT;
break;
case LIBNET_UDLD_TIMEOUT_INTERVAL:
pblock_type = LIBNET_PBLOCK_UDLD_TMT_INTERVAL_H;
value_type = LIBNET_UDLD_VALUE_TYPE_8_BIT_UINT;
break;
case LIBNET_UDLD_DEVICE_NAME:
pblock_type = LIBNET_PBLOCK_UDLD_DEVICE_NAME_H;
value_type = LIBNET_UDLD_VALUE_TYPE_ASCII;
break;
case LIBNET_UDLD_SEQUENCE_NUMBER:
pblock_type = LIBNET_PBLOCK_UDLD_SEQ_NUMBER_H;
value_type = LIBNET_UDLD_VALUE_TYPE_32_BIT_UINT;
break;
default:
snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
"%s(): incorrect TLV type", __func__);
goto bad;
}
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, pblock_type);
if (p == NULL)
{
return (-1);
}
if (libnet_pblock_append(l, p, &network_type_and_len, sizeof(network_type_and_len)) == -1)
{
goto bad;
}
switch(value_type)
{
case LIBNET_UDLD_VALUE_TYPE_ASCII:
case LIBNET_UDLD_VALUE_TYPE_ID_PAIRS:
{
if (libnet_pblock_append(l, p, value, value_s) == -1)
{
goto bad;
}
break;
}
case LIBNET_UDLD_VALUE_TYPE_8_BIT_UINT:
{
if (libnet_pblock_append(l, p, value, sizeof(uint8_t)) == -1)
{
goto bad;
}
break;
}
case LIBNET_UDLD_VALUE_TYPE_32_BIT_UINT:
{
const uint32_t sequence_number = htonl(*(const uint32_t *)value);
if (libnet_pblock_append(l, p, &sequence_number, sizeof(uint32_t)) == -1)
{
goto bad;
}
break;
}
default:
{
snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
"%s(): incorrect value type", __func__);
goto bad;
}
}
if (ptag)
{
return ptag;
}
return libnet_pblock_update(l, p, h, pblock_type);
bad:
libnet_pblock_delete(l, p);
return (-1);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_hdr(uint8_t version, uint8_t opcode, uint8_t flags, uint8_t checksum,
const uint8_t *payload, uint32_t payload_s, libnet_t * l, libnet_ptag_t ptag)
{
struct libnet_udld_hdr udld_hdr;
libnet_pblock_t *p = NULL;
uint32_t n = 0;
uint32_t h = 0;
if (l == NULL)
{
return (-1);
}
n = LIBNET_UDLD_H + payload_s;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_UDLD_H);
if (p == NULL)
{
return (-1);
}
memset(&udld_hdr, 0, sizeof(udld_hdr));
udld_hdr.version_opcode |= (version << LIBNET_UDLD_PDU_VERSION_OFFSET);
udld_hdr.version_opcode |= (opcode);
udld_hdr.flags = flags;
udld_hdr.checksum = checksum;
/*
* Appened the protocol unit to the list.
*/
n = libnet_pblock_append(l, p, (u_char *) & udld_hdr, LIBNET_UDLD_H);
if (n == -1)
{
goto bad;
}
LIBNET_DO_PAYLOAD(l, p);
if (checksum == 0 && l->injection_type != LIBNET_RAW4)
{
/*
* If checksum is zero, by default libnet will compute a checksum
* for the user. The programmer can override this by calling
* libnet_toggle_checksum(l, ptag, 1);
*/
libnet_pblock_setflags(p, LIBNET_PBLOCK_DO_CHECKSUM);
}
return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_UDLD_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_device_id(const uint8_t *value, const uint8_t value_s, libnet_t * l, libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
if ((value && !value_s) || (!value && value_s))
{
sprintf(l->err_buf, "%s(): value inconsistency\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_DEVICE_ID, value, value_s, l, ptag);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_port_id(const uint8_t *value, const uint8_t value_s, libnet_t * l, libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
if ((value && !value_s) || (!value && value_s))
{
sprintf(l->err_buf, "%s(): value inconsistency\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_PORT_ID, value, value_s, l, ptag);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_echo(const uint8_t *value, const uint8_t value_s, libnet_t * l, libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
if ((value && !value_s) || (!value && value_s))
{
sprintf(l->err_buf, "%s(): value inconsistency\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_ECHO, value, value_s, l, ptag);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_message_interval(const uint8_t *value, libnet_t *l,
libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
assert(value && "value cannot be a NULL\n");
if (value == NULL)
{
sprintf(l->err_buf, "%s(): value pointer cannot be a NULL\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_MESSAGE_INTERVAL, value, sizeof(uint8_t), l, ptag);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_timeout_interval(const uint8_t *value, libnet_t *l,
libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
assert(value && "value cannot be a NULL\n");
if (value == NULL)
{
sprintf(l->err_buf, "%s(): value pointer cannot be a NULL\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_TIMEOUT_INTERVAL, (const uint8_t *)value, sizeof(uint8_t), l, ptag);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_device_name(const uint8_t *value, const uint8_t value_s,
libnet_t *l, libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
if ((value && !value_s) || (!value && value_s))
{
sprintf(l->err_buf, "%s(): value inconsistency\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_DEVICE_NAME, value, value_s, l, ptag);
}
LIBNET_API libnet_ptag_t
libnet_build_udld_sequence_number(const uint8_t *value, libnet_t *l,
libnet_ptag_t ptag)
{
if (l == NULL)
{
return (-1);
}
assert(value != NULL && "value cannot be a NULL\n");
if (value == NULL)
{
sprintf(l->err_buf, "%s(): value pointer cannot be a NULL\n", __FUNCTION__);
return (-1);
}
return internal_build_udld_tlv(LIBNET_UDLD_SEQUENCE_NUMBER, value, sizeof(uint32_t), l, ptag);
}
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