Add support for the wget command with NET_LWIP. The command normally expects a URL: wget [loadaddr] url, but it also accepts the legacy syntax: wget [loadaddr] [server:]file. The server IP may alternatively be supplied via ${httpserverip} which has higher priority than ${serverip}.
Based on code initially developed by Maxim U.
Signed-off-by: Jerome Forissier jerome.forissier@linaro.org Co-developed-by: Maxim Uvarov muvarov@gmail.com Cc: Maxim Uvarov muvarov@gmail.com Signed-off-by: Jerome Forissier jerome.forissier@linaro.org --- cmd/Kconfig | 18 ++- cmd/net-lwip.c | 8 + include/net-lwip.h | 18 +++ net/lwip/Makefile | 1 + net/lwip/wget.c | 363 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 400 insertions(+), 8 deletions(-) create mode 100644 net/lwip/wget.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 3a92e18996c..7a49042b4b8 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -2000,14 +2000,6 @@ config SYS_DISABLE_AUTOLOAD is complete. Enable this option to disable this behavior and instead require files to be loaded over the network by subsequent commands.
-config CMD_WGET - bool "wget" - select PROT_TCP - default y if SANDBOX - help - wget is a simple command to download kernel, or other files, - from a http server over TCP. - config CMD_PING6 bool "ping6" depends on IPV6 @@ -2122,6 +2114,16 @@ config CMD_TFTPBOOT help tftpboot - load file via network using TFTP protocol
+config CMD_WGET + bool "wget" + default y if SANDBOX + select PROT_TCP if NET + select PROT_TCP_LWIP if NET_LWIP + select PROT_DNS_LWIP if NET_LWIP + help + wget is a simple command to download kernel, or other files, + from a http server over TCP. + endif # if CMD_NET
endif # if NET || NET_LWIP diff --git a/cmd/net-lwip.c b/cmd/net-lwip.c index c021da6a674..42f8bd6b259 100644 --- a/cmd/net-lwip.c +++ b/cmd/net-lwip.c @@ -35,3 +35,11 @@ U_BOOT_CMD( "hostname [envvar]" ); #endif + +#if defined(CONFIG_CMD_WGET) +U_BOOT_CMD( + wget, 3, 1, do_wget, + "boot image via network using HTTP protocol", + "[loadAddress] URL" +); +#endif diff --git a/include/net-lwip.h b/include/net-lwip.h index ff9d03b23e8..1c3583f82a1 100644 --- a/include/net-lwip.h +++ b/include/net-lwip.h @@ -16,8 +16,26 @@ void net_lwip_remove_netif(struct netif *netif); struct netif *net_lwip_get_netif(void); int net_lwip_rx(struct udevice *udev, struct netif *netif);
+/** + * wget_with_dns() - runs dns host IP address resulution before wget + * + * @dst_addr: destination address to download the file + * @uri: uri string of target file of wget + * Return: downloaded file size, negative if failed + */ + +int wget_with_dns(ulong dst_addr, char *uri); +/** + * wget_validate_uri() - varidate the uri + * + * @uri: uri string of target file of wget + * Return: true if uri is valid, false if uri is invalid + */ +bool wget_validate_uri(char *uri); + int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); int do_dns(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); int do_ping(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_wget(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]);
#endif /* __NET_LWIP_H__ */ diff --git a/net/lwip/Makefile b/net/lwip/Makefile index 645d8a8c457..f2558f8763a 100644 --- a/net/lwip/Makefile +++ b/net/lwip/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_CMD_DHCP) += dhcp.o obj-$(CONFIG_CMD_DNS) += dns.o obj-$(CONFIG_CMD_PING) += ping.o obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o +obj-$(CONFIG_CMD_WGET) += wget.o diff --git a/net/lwip/wget.c b/net/lwip/wget.c new file mode 100644 index 00000000000..e8768fc2acd --- /dev/null +++ b/net/lwip/wget.c @@ -0,0 +1,363 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2024 Linaro Ltd. */ + +#include <command.h> +#include <console.h> +#include <display_options.h> +#include <efi_loader.h> +#include <image.h> +#include <lwip/apps/http_client.h> +#include <lwip/timeouts.h> +#include <mapmem.h> +#include <net.h> +#include <time.h> + +#define SERVER_NAME_SIZE 200 +#define HTTP_PORT_DEFAULT 80 +#define PROGRESS_PRINT_STEP_BYTES (100 * 1024) + +enum done_state { + NOT_DONE = 0, + SUCCESS = 1, + FAILURE = 2 +}; + +struct wget_ctx { + char *path; + ulong daddr; + ulong saved_daddr; + ulong size; + ulong prevsize; + ulong start_time; + enum done_state done; +}; + +static int parse_url(char *url, char *host, u16 *port, char **path) +{ + char *p, *pp; + long lport; + + p = strstr(url, "http://"); + if (!p) { + log_err("only http:// is supported\n"); + return -EINVAL; + } + + p += strlen("http://"); + + /* Parse hostname */ + pp = strchr(p, ':'); + if (!pp) + pp = strchr(p, '/'); + if (!pp) + return -EINVAL; + + if (p + SERVER_NAME_SIZE <= pp) + return -EINVAL; + + memcpy(host, p, pp - p); + host[pp - p] = '\0'; + + if (*pp == ':') { + /* Parse port number */ + p = pp + 1; + lport = simple_strtol(p, &pp, 10); + if (pp && *pp != '/') + return -EINVAL; + if (lport > 65535) + return -EINVAL; + *port = (u16)lport; + } else { + *port = HTTP_PORT_DEFAULT; + } + if (*pp != '/') + return -EINVAL; + *path = pp; + + return 0; +} + +/* + * Legacy syntax support + * Convert [<server_name_or_ip>:]filename into a URL if needed + */ +static int parse_legacy_arg(char *arg, char *nurl, size_t rem) +{ + char *p = nurl; + size_t n; + char *col = strchr(arg, ':'); + char *env; + char *server; + char *path; + + if (strstr(arg, "http") == arg) { + n = snprintf(nurl, rem, "%s", arg); + if (n < 0 || n > rem) + return -1; + return 0; + } + + n = snprintf(p, rem, "%s", "http://"); + if (n < 0 || n > rem) + return -1; + p += n; + rem -= n; + + if (col) { + n = col - arg; + server = arg; + path = col + 1; + } else { + env = env_get("httpserverip"); + if (!env) + env = env_get("serverip"); + if (!env) { + log_err("error: httpserver/serverip has to be set\n"); + return -1; + } + n = strlen(env); + server = env; + path = arg; + } + + if (rem < n) + return -1; + strncpy(p, server, n); + p += n; + rem -= n; + if (rem < 1) + return -1; + *p = '/'; + p++; + rem--; + n = strlen(path); + if (rem < n) + return -1; + strncpy(p, path, n); + p += n; + rem -= n; + if (rem < 1) + return -1; + *p = '\0'; + + return 0; +} + +static err_t httpc_recv_cb(void *arg, struct altcp_pcb *pcb, struct pbuf *pbuf, + err_t err) +{ + struct wget_ctx *ctx = arg; + struct pbuf *buf; + + if (!pbuf) + return ERR_BUF; + + if (!ctx->start_time) + ctx->start_time = get_timer(0); + + for (buf = pbuf; buf; buf = buf->next) { + memcpy((void *)ctx->daddr, buf->payload, buf->len); + ctx->daddr += buf->len; + ctx->size += buf->len; + if (ctx->size - ctx->prevsize > PROGRESS_PRINT_STEP_BYTES) { + printf("#"); + ctx->prevsize = ctx->size; + } + } + + altcp_recved(pcb, pbuf->tot_len); + pbuf_free(pbuf); + return ERR_OK; +} + +static void httpc_result_cb(void *arg, httpc_result_t httpc_result, + u32_t rx_content_len, u32_t srv_res, err_t err) +{ + struct wget_ctx *ctx = arg; + ulong elapsed; + + if (httpc_result != HTTPC_RESULT_OK) { + log_err("\nHTTP client error %d\n", httpc_result); + ctx->done = FAILURE; + return; + } + if (srv_res != 200) { + log_err("\nHTTP server error %d\n", srv_res); + ctx->done = FAILURE; + return; + } + + elapsed = get_timer(ctx->start_time); + if (!elapsed) + elapsed = 1; + if (rx_content_len > PROGRESS_PRINT_STEP_BYTES) + printf("\n"); + printf("%u bytes transferred in %lu ms (", rx_content_len, elapsed); + print_size(rx_content_len / elapsed * 1000, "/s)\n"); + printf("Bytes transferred = %lu (%lx hex)\n", ctx->size, ctx->size); + efi_set_bootdev("Net", "", ctx->path, map_sysmem(ctx->saved_daddr, 0), + rx_content_len); + if (env_set_hex("filesize", rx_content_len) || + env_set_hex("fileaddr", ctx->saved_daddr)) { + log_err("Could not set filesize or fileaddr\n"); + ctx->done = FAILURE; + return; + } + + ctx->done = SUCCESS; +} + +static int wget_loop(struct udevice *udev, ulong dst_addr, char *uri) +{ + char server_name[SERVER_NAME_SIZE]; + httpc_connection_t conn; + httpc_state_t *state; + struct netif *netif; + struct wget_ctx ctx; + char *path; + u16 port; + + ctx.daddr = dst_addr; + ctx.saved_daddr = dst_addr; + ctx.done = NOT_DONE; + ctx.size = 0; + ctx.prevsize = 0; + ctx.start_time = 0; + + if (parse_url(uri, server_name, &port, &path)) + return CMD_RET_USAGE; + + netif = net_lwip_new_netif(udev); + if (!netif) + return -1; + + memset(&conn, 0, sizeof(conn)); + conn.result_fn = httpc_result_cb; + ctx.path = path; + if (httpc_get_file_dns(server_name, port, path, &conn, httpc_recv_cb, + &ctx, &state)) { + net_lwip_remove_netif(netif); + return CMD_RET_FAILURE; + } + + while (!ctx.done) { + net_lwip_rx(udev, netif); + sys_check_timeouts(); + if (ctrlc()) + break; + } + + net_lwip_remove_netif(netif); + + if (ctx.done == SUCCESS) + return 0; + + return -1; +} + +int wget_with_dns(ulong dst_addr, char *uri) +{ + eth_set_current(); + + return wget_loop(eth_get_dev(), dst_addr, uri); +} + +int do_wget(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) +{ + char *end; + char *url; + ulong dst_addr; + char nurl[1024]; + + if (argc < 2 || argc > 3) + return CMD_RET_USAGE; + + dst_addr = hextoul(argv[1], &end); + if (end == (argv[1] + strlen(argv[1]))) { + if (argc < 3) + return CMD_RET_USAGE; + url = argv[2]; + } else { + dst_addr = image_load_addr; + url = argv[1]; + } + + if (parse_legacy_arg(url, nurl, sizeof(nurl))) + return CMD_RET_FAILURE; + + if (wget_with_dns(dst_addr, nurl)) + return CMD_RET_FAILURE; + + return CMD_RET_SUCCESS; +} + +/** + * wget_validate_uri() - validate the uri for wget + * + * @uri: uri string + * + * This function follows the current U-Boot wget implementation. + * scheme: only "http:" is supported + * authority: + * - user information: not supported + * - host: supported + * - port: not supported(always use the default port) + * + * Uri is expected to be correctly percent encoded. + * This is the minimum check, control codes(0x1-0x19, 0x7F, except '\0') + * and space character(0x20) are not allowed. + * + * TODO: stricter uri conformance check + * + * Return: true on success, false on failure + */ +bool wget_validate_uri(char *uri) +{ + char c; + bool ret = true; + char *str_copy, *s, *authority; + + for (c = 0x1; c < 0x21; c++) { + if (strchr(uri, c)) { + log_err("invalid character is used\n"); + return false; + } + } + if (strchr(uri, 0x7f)) { + log_err("invalid character is used\n"); + return false; + } + + if (strncmp(uri, "http://", 7)) { + log_err("only http:// is supported\n"); + return false; + } + str_copy = strdup(uri); + if (!str_copy) + return false; + + s = str_copy + strlen("http://"); + authority = strsep(&s, "/"); + if (!s) { + log_err("invalid uri, no file path\n"); + ret = false; + goto out; + } + s = strchr(authority, '@'); + if (s) { + log_err("user information is not supported\n"); + ret = false; + goto out; + } + s = strchr(authority, ':'); + if (s) { + log_err("user defined port is not supported\n"); + ret = false; + goto out; + } + +out: + free(str_copy); + + return ret; +}