/**
* ib_ud_header_unpack - Unpack UD header struct from wire format
* @header:UD header struct
* @buf:Buffer to pack into
*
* ib_ud_header_pack() unpacks the UD header structure @header from wire
* format in the buffer @buf.
*/
int ib_ud_header_unpack(void *buf,
struct ib_ud_header *header)
{
ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
buf, &header->lrh);
buf += IB_LRH_BYTES;
if (header->lrh.link_version != 0) {
printk(KERN_WARNING "Invalid LRH.link_version %d\n",
header->lrh.link_version);
return -EINVAL;
}
switch (header->lrh.link_next_header) {
case IB_LNH_IBA_LOCAL:
header->grh_present = 0;
break;
case IB_LNH_IBA_GLOBAL:
header->grh_present = 1;
ib_unpack(grh_table, ARRAY_SIZE(grh_table),
buf, &header->grh);
buf += IB_GRH_BYTES;
if (header->grh.ip_version != 6) {
printk(KERN_WARNING "Invalid GRH.ip_version %d\n",
header->grh.ip_version);
return -EINVAL;
}
if (header->grh.next_header != 0x1b) {
printk(KERN_WARNING "Invalid GRH.next_header 0x%02x\n",
header->grh.next_header);
return -EINVAL;
}
break;
default:
printk(KERN_WARNING "Invalid LRH.link_next_header %d\n",
header->lrh.link_next_header);
return -EINVAL;
}
ib_unpack(bth_table, ARRAY_SIZE(bth_table),
buf, &header->bth);
buf += IB_BTH_BYTES;
switch (header->bth.opcode) {
case IB_OPCODE_UD_SEND_ONLY:
header->immediate_present = 0;
break;
case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
header->immediate_present = 1;
break;
default:
printk(KERN_WARNING "Invalid BTH.opcode 0x%02x\n",
header->bth.opcode);
return -EINVAL;
}
if (header->bth.transport_header_version != 0) {
printk(KERN_WARNING "Invalid BTH.transport_header_version %d\n",
header->bth.transport_header_version);
return -EINVAL;
}
ib_unpack(deth_table, ARRAY_SIZE(deth_table),
buf, &header->deth);
buf += IB_DETH_BYTES;
if (header->immediate_present)
memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
return 0;
}
/**
* ib_lrh_header_unpack - Unpack LRH structure from wire format
* @lrh:unpacked LRH header struct
* @buf:Buffer to pack into
*
* ib_lrh_header_unpack() unpacks the LRH header structure from
* wire format (in buf) into @lrh.
*/
int ib_lrh_header_unpack(void *buf, struct ib_unpacked_lrh *lrh)
{
ib_unpack(lrh_table, ARRAY_SIZE(lrh_table), buf, lrh);
return 0;
}
