Add efi_dp_from_http to form a device path from HTTP. The device path is the concatenation of the device path returned by efi_dp_from_ipv4 together with an URI node and an END node.
Signed-off-by: Adriano Cordova adrianox@gmail.com Reviewed-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org --- include/efi_loader.h | 1 + lib/efi_loader/efi_device_path.c | 64 ++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+)
diff --git a/include/efi_loader.h b/include/efi_loader.h index 612bc42816..96b204dfc3 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -872,6 +872,7 @@ struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part); struct efi_device_path *efi_dp_from_file(const struct efi_device_path *dp, const char *path); struct efi_device_path *efi_dp_from_eth(void); +struct efi_device_path *efi_dp_from_http(const char *server); struct efi_device_path *efi_dp_from_mem(uint32_t mem_type, uint64_t start_address, size_t size); diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index 6fcbc91e0b..a6d4300686 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -1021,6 +1021,70 @@ static struct efi_device_path *efi_dp_from_ipv4(struct efi_ipv4_address *ip, return dp2; }
+/** + * efi_dp_from_http() - set device path from http + * + * Set the device path to an IPv4 path as provided by efi_dp_from_ipv4 + * concatenated with a device path of subtype DEVICE_PATH_SUB_TYPE_MSG_URI, + * and an END node. + * + * @server: URI of remote server + * Return: pointer to HTTP device path, NULL on error + */ +struct efi_device_path *efi_dp_from_http(const char *server) +{ + struct efi_device_path *dp1, *dp2; + struct efi_device_path_uri *uridp; + efi_uintn_t uridp_len; + char *pos; + char tmp[128]; + struct efi_ipv4_address ip; + struct efi_ipv4_address mask; + + if ((server && strlen("http://") + strlen(server) + 1 > sizeof(tmp)) || + (!server && IS_ENABLED(CONFIG_NET_LWIP))) + return NULL; + + efi_net_get_addr(&ip, &mask, NULL); + + dp1 = efi_dp_from_ipv4(&ip, &mask, NULL); + if (!dp1) + return NULL; + + strcpy(tmp, "http://"); + + if (server) { + strlcat(tmp, server, sizeof(tmp)); +#if !IS_ENABLED(CONFIG_NET_LWIP) + } + else { + ip_to_string(net_server_ip, tmp + strlen("http://")); +#endif + } + + uridp_len = sizeof(struct efi_device_path) + strlen(tmp) + 1; + uridp = efi_alloc(uridp_len + sizeof(END)); + if (!uridp) { + log_err("Out of memory\n"); + return NULL; + } + uridp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; + uridp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_URI; + uridp->dp.length = uridp_len; + debug("device path: setting uri device path to %s\n", tmp); + memcpy(uridp->uri, tmp, strlen(tmp) + 1); + + pos = (char *)uridp + uridp_len; + memcpy(pos, &END, sizeof(END)); + + dp2 = efi_dp_concat(dp1, (const struct efi_device_path *)uridp, 0); + + efi_free_pool(uridp); + efi_free_pool(dp1); + + return dp2; +} + /* Construct a device-path for memory-mapped image */ struct efi_device_path *efi_dp_from_mem(uint32_t memory_type, uint64_t start_address,