Blame view
net/fastboot.c
8.06 KB
f73a7df98 net: fastboot: Me... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 |
// SPDX-License-Identifier: BSD-2-Clause /* * Copyright (C) 2016 The Android Open Source Project */ #include <common.h> #include <fastboot.h> #include <net.h> #include <net/fastboot.h> /* Fastboot port # defined in spec */ #define WELL_KNOWN_PORT 5554 enum { FASTBOOT_ERROR = 0, FASTBOOT_QUERY = 1, FASTBOOT_INIT = 2, FASTBOOT_FASTBOOT = 3, }; struct __packed fastboot_header { uchar id; uchar flags; unsigned short seq; }; #define PACKET_SIZE 1024 #define DATA_SIZE (PACKET_SIZE - sizeof(struct fastboot_header)) /* Sequence number sent for every packet */ static unsigned short sequence_number = 1; static const unsigned short packet_size = PACKET_SIZE; static const unsigned short udp_version = 1; /* Keep track of last packet for resubmission */ static uchar last_packet[PACKET_SIZE]; static unsigned int last_packet_len; static struct in_addr fastboot_remote_ip; /* The UDP port at their end */ static int fastboot_remote_port; /* The UDP port at our end */ static int fastboot_our_port; static void boot_downloaded_image(void); #if CONFIG_IS_ENABLED(FASTBOOT_FLASH) /** * fastboot_udp_send_info() - Send an INFO packet during long commands. * * @msg: String describing the reason for waiting */ static void fastboot_udp_send_info(const char *msg) { uchar *packet; uchar *packet_base; int len = 0; char response[FASTBOOT_RESPONSE_LEN] = {0}; struct fastboot_header response_header = { .id = FASTBOOT_FASTBOOT, .flags = 0, .seq = htons(sequence_number) }; ++sequence_number; packet = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE; packet_base = packet; /* Write headers */ memcpy(packet, &response_header, sizeof(response_header)); packet += sizeof(response_header); /* Write response */ fastboot_response("INFO", response, "%s", msg); memcpy(packet, response, strlen(response)); packet += strlen(response); len = packet - packet_base; /* Save packet for retransmitting */ last_packet_len = len; memcpy(last_packet, packet_base, last_packet_len); net_send_udp_packet(net_server_ethaddr, fastboot_remote_ip, fastboot_remote_port, fastboot_our_port, len); } /** * fastboot_timed_send_info() - Send INFO packet every 30 seconds * * @msg: String describing the reason for waiting * * Send an INFO packet during long commands based on timer. An INFO packet * is sent if the time is 30 seconds after start. Else, noop. */ static void fastboot_timed_send_info(const char *msg) { static ulong start; /* Initialize timer */ if (start == 0) start = get_timer(0); ulong time = get_timer(start); /* Send INFO packet to host every 30 seconds */ if (time >= 30000) { start = get_timer(0); fastboot_udp_send_info(msg); } } #endif /** * fastboot_send() - Sends a packet in response to received fastboot packet * * @header: Header for response packet * @fastboot_data: Pointer to received fastboot data * @fastboot_data_len: Length of received fastboot data * @retransmit: Nonzero if sending last sent packet */ static void fastboot_send(struct fastboot_header header, char *fastboot_data, unsigned int fastboot_data_len, uchar retransmit) { uchar *packet; uchar *packet_base; int len = 0; const char *error_msg = "An error occurred."; short tmp; struct fastboot_header response_header = header; static char command[FASTBOOT_COMMAND_LEN]; static int cmd = -1; static bool pending_command; char response[FASTBOOT_RESPONSE_LEN] = {0}; /* * We will always be sending some sort of packet, so * cobble together the packet headers now. */ packet = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE; packet_base = packet; /* Resend last packet */ if (retransmit) { memcpy(packet, last_packet, last_packet_len); net_send_udp_packet(net_server_ethaddr, fastboot_remote_ip, fastboot_remote_port, fastboot_our_port, last_packet_len); return; } response_header.seq = htons(response_header.seq); memcpy(packet, &response_header, sizeof(response_header)); packet += sizeof(response_header); switch (header.id) { case FASTBOOT_QUERY: tmp = htons(sequence_number); memcpy(packet, &tmp, sizeof(tmp)); packet += sizeof(tmp); break; case FASTBOOT_INIT: tmp = htons(udp_version); memcpy(packet, &tmp, sizeof(tmp)); packet += sizeof(tmp); tmp = htons(packet_size); memcpy(packet, &tmp, sizeof(tmp)); packet += sizeof(tmp); break; case FASTBOOT_ERROR: memcpy(packet, error_msg, strlen(error_msg)); packet += strlen(error_msg); break; case FASTBOOT_FASTBOOT: if (cmd == FASTBOOT_COMMAND_DOWNLOAD) { if (!fastboot_data_len && !fastboot_data_remaining()) { fastboot_data_complete(response); } else { fastboot_data_download(fastboot_data, fastboot_data_len, response); } } else if (!pending_command) { strlcpy(command, fastboot_data, min((size_t)fastboot_data_len + 1, sizeof(command))); pending_command = true; } else { cmd = fastboot_handle_command(command, response); pending_command = false; } /* * Sent some INFO packets, need to update sequence number in * header */ if (header.seq != sequence_number) { response_header.seq = htons(sequence_number); memcpy(packet_base, &response_header, sizeof(response_header)); } /* Write response to packet */ memcpy(packet, response, strlen(response)); packet += strlen(response); break; default: pr_err("ID %d not implemented. ", header.id); return; } len = packet - packet_base; /* Save packet for retransmitting */ last_packet_len = len; memcpy(last_packet, packet_base, last_packet_len); net_send_udp_packet(net_server_ethaddr, fastboot_remote_ip, fastboot_remote_port, fastboot_our_port, len); /* Continue boot process after sending response */ if (!strncmp("OKAY", response, 4)) { switch (cmd) { case FASTBOOT_COMMAND_BOOT: boot_downloaded_image(); break; case FASTBOOT_COMMAND_CONTINUE: net_set_state(NETLOOP_SUCCESS); break; case FASTBOOT_COMMAND_REBOOT: case FASTBOOT_COMMAND_REBOOT_BOOTLOADER: do_reset(NULL, 0, 0, NULL); break; } } if (!strncmp("OKAY", response, 4) || !strncmp("FAIL", response, 4)) cmd = -1; } /** * boot_downloaded_image() - Boots into downloaded image. */ static void boot_downloaded_image(void) { fastboot_boot(); net_set_state(NETLOOP_SUCCESS); } /** * fastboot_handler() - Incoming UDP packet handler. * * @packet: Pointer to incoming UDP packet * @dport: Destination UDP port * @sip: Source IP address * @sport: Source UDP port * @len: Packet length */ static void fastboot_handler(uchar *packet, unsigned int dport, struct in_addr sip, unsigned int sport, unsigned int len) { struct fastboot_header header; char fastboot_data[DATA_SIZE] = {0}; unsigned int fastboot_data_len = 0; if (dport != fastboot_our_port) return; fastboot_remote_ip = sip; fastboot_remote_port = sport; if (len < sizeof(struct fastboot_header) || len > PACKET_SIZE) return; memcpy(&header, packet, sizeof(header)); header.flags = 0; header.seq = ntohs(header.seq); packet += sizeof(header); len -= sizeof(header); switch (header.id) { case FASTBOOT_QUERY: fastboot_send(header, fastboot_data, 0, 0); break; case FASTBOOT_INIT: case FASTBOOT_FASTBOOT: fastboot_data_len = len; if (len > 0) memcpy(fastboot_data, packet, len); if (header.seq == sequence_number) { fastboot_send(header, fastboot_data, fastboot_data_len, 0); sequence_number++; } else if (header.seq == sequence_number - 1) { /* Retransmit last sent packet */ fastboot_send(header, fastboot_data, fastboot_data_len, 1); } break; default: pr_err("ID %d not implemented. ", header.id); header.id = FASTBOOT_ERROR; fastboot_send(header, fastboot_data, 0, 0); break; } } void fastboot_start_server(void) { printf("Using %s device ", eth_get_name()); printf("Listening for fastboot command on %pI4 ", &net_ip); fastboot_our_port = WELL_KNOWN_PORT; |
6dc73df73 net: fastboot: Fi... |
315 |
#if CONFIG_IS_ENABLED(FASTBOOT_FLASH) |
f73a7df98 net: fastboot: Me... |
316 |
fastboot_set_progress_callback(fastboot_timed_send_info); |
6dc73df73 net: fastboot: Fi... |
317 |
#endif |
f73a7df98 net: fastboot: Me... |
318 319 320 321 322 |
net_set_udp_handler(fastboot_handler); /* zero out server ether in case the server ip has changed */ memset(net_server_ethaddr, 0, 6); } |