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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* QEMU SPDM socket support
*
* This is based on:
* https://github.com/DMTF/spdm-emu/blob/07c0a838bcc1c6207c656ac75885c0603e344b6f/spdm_emu/spdm_emu_common/command.c
* but has been re-written to match QEMU style
*
* Copyright (c) 2021, DMTF. All rights reserved.
* Copyright (c) 2023. Western Digital Corporation or its affiliates.
*/
#include "qemu/osdep.h"
#include "sysemu/spdm-socket.h"
#include "qapi/error.h"
static bool read_bytes(const int socket, uint8_t *buffer,
size_t number_of_bytes)
{
ssize_t number_received = 0;
ssize_t result;
while (number_received < number_of_bytes) {
result = recv(socket, buffer + number_received,
number_of_bytes - number_received, 0);
if (result <= 0) {
return false;
}
number_received += result;
}
return true;
}
static bool read_data32(const int socket, uint32_t *data)
{
bool result;
result = read_bytes(socket, (uint8_t *)data, sizeof(uint32_t));
if (!result) {
return result;
}
*data = ntohl(*data);
return true;
}
static bool read_multiple_bytes(const int socket, uint8_t *buffer,
uint32_t *bytes_received,
uint32_t max_buffer_length)
{
uint32_t length;
bool result;
result = read_data32(socket, &length);
if (!result) {
return result;
}
if (length > max_buffer_length) {
return false;
}
if (bytes_received) {
*bytes_received = length;
}
if (length == 0) {
return true;
}
return read_bytes(socket, buffer, length);
}
static bool receive_platform_data(const int socket,
uint32_t transport_type,
uint32_t *command,
uint8_t *receive_buffer,
uint32_t *bytes_to_receive)
{
bool result;
uint32_t response;
uint32_t bytes_received;
result = read_data32(socket, &response);
if (!result) {
return result;
}
*command = response;
result = read_data32(socket, &transport_type);
if (!result) {
return result;
}
bytes_received = 0;
result = read_multiple_bytes(socket, receive_buffer, &bytes_received,
*bytes_to_receive);
if (!result) {
return result;
}
*bytes_to_receive = bytes_received;
return result;
}
static bool write_bytes(const int socket, const uint8_t *buffer,
uint32_t number_of_bytes)
{
ssize_t number_sent = 0;
ssize_t result;
while (number_sent < number_of_bytes) {
result = send(socket, buffer + number_sent,
number_of_bytes - number_sent, 0);
if (result == -1) {
return false;
}
number_sent += result;
}
return true;
}
static bool write_data32(const int socket, uint32_t data)
{
data = htonl(data);
return write_bytes(socket, (uint8_t *)&data, sizeof(uint32_t));
}
static bool write_multiple_bytes(const int socket, const uint8_t *buffer,
uint32_t bytes_to_send)
{
bool result;
result = write_data32(socket, bytes_to_send);
if (!result) {
return result;
}
return write_bytes(socket, buffer, bytes_to_send);
}
static bool send_platform_data(const int socket,
uint32_t transport_type, uint32_t command,
const uint8_t *send_buffer, size_t bytes_to_send)
{
bool result;
result = write_data32(socket, command);
if (!result) {
return result;
}
result = write_data32(socket, transport_type);
if (!result) {
return result;
}
return write_multiple_bytes(socket, send_buffer, bytes_to_send);
}
int spdm_socket_connect(uint16_t port, Error **errp)
{
int client_socket;
struct sockaddr_in server_addr;
client_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (client_socket < 0) {
error_setg(errp, "cannot create socket: %s", strerror(errno));
return -1;
}
memset((char *)&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
server_addr.sin_port = htons(port);
if (connect(client_socket, (struct sockaddr *)&server_addr,
sizeof(server_addr)) < 0) {
error_setg(errp, "cannot connect: %s", strerror(errno));
close(client_socket);
return -1;
}
return client_socket;
}
uint32_t spdm_socket_rsp(const int socket, uint32_t transport_type,
void *req, uint32_t req_len,
void *rsp, uint32_t rsp_len)
{
uint32_t command;
bool result;
result = send_platform_data(socket, transport_type,
SPDM_SOCKET_COMMAND_NORMAL,
req, req_len);
if (!result) {
return 0;
}
result = receive_platform_data(socket, transport_type, &command,
(uint8_t *)rsp, &rsp_len);
if (!result) {
return 0;
}
assert(command != 0);
return rsp_len;
}
void spdm_socket_close(const int socket, uint32_t transport_type)
{
send_platform_data(socket, transport_type,
SPDM_SOCKET_COMMAND_SHUTDOWN, NULL, 0);
}
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