Huai-Cheng Kuo | bc419a1 | 2024-07-03 19:20:26 +1000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: BSD-3-Clause */ |
| 2 | /* |
| 3 | * QEMU SPDM socket support |
| 4 | * |
| 5 | * This is based on: |
| 6 | * https://github.com/DMTF/spdm-emu/blob/07c0a838bcc1c6207c656ac75885c0603e344b6f/spdm_emu/spdm_emu_common/command.c |
| 7 | * but has been re-written to match QEMU style |
| 8 | * |
| 9 | * Copyright (c) 2021, DMTF. All rights reserved. |
| 10 | * Copyright (c) 2023. Western Digital Corporation or its affiliates. |
| 11 | */ |
| 12 | |
| 13 | #include "qemu/osdep.h" |
| 14 | #include "sysemu/spdm-socket.h" |
| 15 | #include "qapi/error.h" |
| 16 | |
| 17 | static bool read_bytes(const int socket, uint8_t *buffer, |
| 18 | size_t number_of_bytes) |
| 19 | { |
| 20 | ssize_t number_received = 0; |
| 21 | ssize_t result; |
| 22 | |
| 23 | while (number_received < number_of_bytes) { |
| 24 | result = recv(socket, buffer + number_received, |
| 25 | number_of_bytes - number_received, 0); |
| 26 | if (result <= 0) { |
| 27 | return false; |
| 28 | } |
| 29 | number_received += result; |
| 30 | } |
| 31 | return true; |
| 32 | } |
| 33 | |
| 34 | static bool read_data32(const int socket, uint32_t *data) |
| 35 | { |
| 36 | bool result; |
| 37 | |
| 38 | result = read_bytes(socket, (uint8_t *)data, sizeof(uint32_t)); |
| 39 | if (!result) { |
| 40 | return result; |
| 41 | } |
| 42 | *data = ntohl(*data); |
| 43 | return true; |
| 44 | } |
| 45 | |
| 46 | static bool read_multiple_bytes(const int socket, uint8_t *buffer, |
| 47 | uint32_t *bytes_received, |
| 48 | uint32_t max_buffer_length) |
| 49 | { |
| 50 | uint32_t length; |
| 51 | bool result; |
| 52 | |
| 53 | result = read_data32(socket, &length); |
| 54 | if (!result) { |
| 55 | return result; |
| 56 | } |
| 57 | |
| 58 | if (length > max_buffer_length) { |
| 59 | return false; |
| 60 | } |
| 61 | |
| 62 | if (bytes_received) { |
| 63 | *bytes_received = length; |
| 64 | } |
| 65 | |
| 66 | if (length == 0) { |
| 67 | return true; |
| 68 | } |
| 69 | |
| 70 | return read_bytes(socket, buffer, length); |
| 71 | } |
| 72 | |
| 73 | static bool receive_platform_data(const int socket, |
| 74 | uint32_t transport_type, |
| 75 | uint32_t *command, |
| 76 | uint8_t *receive_buffer, |
| 77 | uint32_t *bytes_to_receive) |
| 78 | { |
| 79 | bool result; |
| 80 | uint32_t response; |
| 81 | uint32_t bytes_received; |
| 82 | |
| 83 | result = read_data32(socket, &response); |
| 84 | if (!result) { |
| 85 | return result; |
| 86 | } |
| 87 | *command = response; |
| 88 | |
| 89 | result = read_data32(socket, &transport_type); |
| 90 | if (!result) { |
| 91 | return result; |
| 92 | } |
| 93 | |
| 94 | bytes_received = 0; |
| 95 | result = read_multiple_bytes(socket, receive_buffer, &bytes_received, |
| 96 | *bytes_to_receive); |
| 97 | if (!result) { |
| 98 | return result; |
| 99 | } |
| 100 | *bytes_to_receive = bytes_received; |
| 101 | |
| 102 | return result; |
| 103 | } |
| 104 | |
| 105 | static bool write_bytes(const int socket, const uint8_t *buffer, |
| 106 | uint32_t number_of_bytes) |
| 107 | { |
| 108 | ssize_t number_sent = 0; |
| 109 | ssize_t result; |
| 110 | |
| 111 | while (number_sent < number_of_bytes) { |
| 112 | result = send(socket, buffer + number_sent, |
| 113 | number_of_bytes - number_sent, 0); |
| 114 | if (result == -1) { |
| 115 | return false; |
| 116 | } |
| 117 | number_sent += result; |
| 118 | } |
| 119 | return true; |
| 120 | } |
| 121 | |
| 122 | static bool write_data32(const int socket, uint32_t data) |
| 123 | { |
| 124 | data = htonl(data); |
| 125 | return write_bytes(socket, (uint8_t *)&data, sizeof(uint32_t)); |
| 126 | } |
| 127 | |
| 128 | static bool write_multiple_bytes(const int socket, const uint8_t *buffer, |
| 129 | uint32_t bytes_to_send) |
| 130 | { |
| 131 | bool result; |
| 132 | |
| 133 | result = write_data32(socket, bytes_to_send); |
| 134 | if (!result) { |
| 135 | return result; |
| 136 | } |
| 137 | |
| 138 | return write_bytes(socket, buffer, bytes_to_send); |
| 139 | } |
| 140 | |
| 141 | static bool send_platform_data(const int socket, |
| 142 | uint32_t transport_type, uint32_t command, |
| 143 | const uint8_t *send_buffer, size_t bytes_to_send) |
| 144 | { |
| 145 | bool result; |
| 146 | |
| 147 | result = write_data32(socket, command); |
| 148 | if (!result) { |
| 149 | return result; |
| 150 | } |
| 151 | |
| 152 | result = write_data32(socket, transport_type); |
| 153 | if (!result) { |
| 154 | return result; |
| 155 | } |
| 156 | |
| 157 | return write_multiple_bytes(socket, send_buffer, bytes_to_send); |
| 158 | } |
| 159 | |
| 160 | int spdm_socket_connect(uint16_t port, Error **errp) |
| 161 | { |
| 162 | int client_socket; |
| 163 | struct sockaddr_in server_addr; |
| 164 | |
| 165 | client_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 166 | if (client_socket < 0) { |
| 167 | error_setg(errp, "cannot create socket: %s", strerror(errno)); |
| 168 | return -1; |
| 169 | } |
| 170 | |
| 171 | memset((char *)&server_addr, 0, sizeof(server_addr)); |
| 172 | server_addr.sin_family = AF_INET; |
| 173 | server_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 174 | server_addr.sin_port = htons(port); |
| 175 | |
| 176 | |
| 177 | if (connect(client_socket, (struct sockaddr *)&server_addr, |
| 178 | sizeof(server_addr)) < 0) { |
| 179 | error_setg(errp, "cannot connect: %s", strerror(errno)); |
| 180 | close(client_socket); |
| 181 | return -1; |
| 182 | } |
| 183 | |
| 184 | return client_socket; |
| 185 | } |
| 186 | |
| 187 | uint32_t spdm_socket_rsp(const int socket, uint32_t transport_type, |
| 188 | void *req, uint32_t req_len, |
| 189 | void *rsp, uint32_t rsp_len) |
| 190 | { |
| 191 | uint32_t command; |
| 192 | bool result; |
| 193 | |
| 194 | result = send_platform_data(socket, transport_type, |
| 195 | SPDM_SOCKET_COMMAND_NORMAL, |
| 196 | req, req_len); |
| 197 | if (!result) { |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | result = receive_platform_data(socket, transport_type, &command, |
| 202 | (uint8_t *)rsp, &rsp_len); |
| 203 | if (!result) { |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | assert(command != 0); |
| 208 | |
| 209 | return rsp_len; |
| 210 | } |
| 211 | |
| 212 | void spdm_socket_close(const int socket, uint32_t transport_type) |
| 213 | { |
| 214 | send_platform_data(socket, transport_type, |
| 215 | SPDM_SOCKET_COMMAND_SHUTDOWN, NULL, 0); |
| 216 | } |