static uint32_t
TPM_ReceiveCharDev(int sock_fd, struct tpm_buffer *tb)
{
uint32_t rc = 0;
uint32_t paramSize = 0;
unsigned char *buffer = tb->buffer;
#ifndef USE_PARTIAL_READ
/* read the whole packet */
if (rc == 0) {
int nread;
nread = read(sock_fd, tb->buffer, tb->size);
if (nread < 0) {
rc = ERR_IO;
} else {
tb->used = nread;
}
}
#endif
#ifdef USE_PARTIAL_READ
/* read the tag and paramSize */
if (rc == 0) {
rc = TPM_ReceiveBytes(sock_fd, buffer, TPM_U16_SIZE + TPM_U32_SIZE);
}
#endif
/* extract the paramSize */
if (rc == 0) {
paramSize = LOAD32(buffer, TPM_PARAMSIZE_OFFSET);
if (paramSize > TPM_MAX_BUFF_SIZE) {
printf("TPM_ReceiveCharDev: paramSize %u greater than %u\n",
paramSize, TPM_MAX_BUFF_SIZE);
rc = ERR_BAD_RESP;
}
}
#ifdef USE_PARTIAL_READ
/* read the rest of the packet */
if (rc == 0) {
rc = TPM_ReceiveBytes(sock_fd,
buffer + TPM_U16_SIZE + TPM_U32_SIZE,
paramSize - (TPM_U16_SIZE + TPM_U32_SIZE));
}
#endif
/* read the TPM return code from the packet */
if (rc == 0) {
showBuff(buffer, "TPM_ReceiveCharDev: From TPM");
tb->used = paramSize;
tpm_buffer_load32(tb, TPM_RETURN_OFFSET, &rc);
}
return rc;
}
static uint32_t TPM_ReceiveSocket(int sock_fd, struct tpm_buffer *tb)
{
uint32_t rc = 0;
uint32_t paramSize = 0;
uint32_t addsize = 0;
unsigned char *buffer = tb->buffer;
if (TPM_LowLevel_Use_VTPM())
addsize = sizeof(uint32_t);
/* read the tag and paramSize */
if (rc == 0) {
rc = TPM_ReceiveBytes(sock_fd, buffer,
addsize + TPM_U16_SIZE + TPM_U32_SIZE);
}
/* extract the paramSize */
if (rc == 0) {
paramSize = LOAD32(buffer, addsize + TPM_PARAMSIZE_OFFSET);
if (paramSize > TPM_MAX_BUFF_SIZE) {
printf
("TPM_ReceiveSocket: ERROR: paramSize %u greater than %u\n",
paramSize, TPM_MAX_BUFF_SIZE);
rc = ERR_BAD_RESP;
}
}
/* read the rest of the packet */
if (rc == 0) {
rc = TPM_ReceiveBytes(sock_fd,
buffer + addsize + TPM_U16_SIZE +
TPM_U32_SIZE,
paramSize - (TPM_U16_SIZE + TPM_U32_SIZE));
}
/* read the TPM return code from the packet */
if (rc == 0) {
showBuff(buffer, "TPM_ReceiveSocket: From TPM");
rc = LOAD32(buffer, addsize + TPM_RETURN_OFFSET);
tb->used = addsize + paramSize;
}
return rc;
}