From fc895bb1e213cca47bf9335615dcd1c2b778b5b6 Mon Sep 17 00:00:00 2001 From: Luka Perkov Date: Tue, 12 May 2015 00:22:01 +0200 Subject: [PATCH] file: add support for base64 Signed-off-by: Luka Perkov --- file.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 79 insertions(+), 11 deletions(-) diff --git a/file.c b/file.c index 9c1b301..02fb72e 100644 --- a/file.c +++ b/file.c @@ -29,6 +29,7 @@ #include #include #include +#include #include @@ -78,15 +79,28 @@ static const struct blobmsg_policy rpc_file_r_policy[__RPC_F_R_MAX] = { [RPC_F_R_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING }, }; +enum { + RPC_F_RB_PATH, + RPC_F_RB_BASE64, + __RPC_F_RB_MAX, +}; + +static const struct blobmsg_policy rpc_file_rb_policy[__RPC_F_RB_MAX] = { + [RPC_F_RB_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING }, + [RPC_F_RB_BASE64] = { .name = "base64", .type = BLOBMSG_TYPE_BOOL }, +}; + enum { RPC_F_RW_PATH, RPC_F_RW_DATA, + RPC_F_RW_BASE64, __RPC_F_RW_MAX, }; static const struct blobmsg_policy rpc_file_rw_policy[__RPC_F_RW_MAX] = { - [RPC_F_RW_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING }, - [RPC_F_RW_DATA] = { .name = "data", .type = BLOBMSG_TYPE_STRING }, + [RPC_F_RW_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING }, + [RPC_F_RW_DATA] = { .name = "data", .type = BLOBMSG_TYPE_STRING }, + [RPC_F_RW_BASE64] = { .name = "base64", .type = BLOBMSG_TYPE_BOOL }, }; enum { @@ -162,12 +176,22 @@ rpc_file_read(struct ubus_context *ctx, struct ubus_object *obj, struct ubus_request_data *req, const char *method, struct blob_attr *msg) { - int fd, rv, len; + static struct blob_attr *tb[__RPC_F_RB_MAX]; + bool base64 = false; + int fd, rv; + ssize_t len; char *path; struct stat s; char *wbuf; - if (!rpc_check_path(msg, &path, &s)) + blobmsg_parse(rpc_file_rb_policy, __RPC_F_RB_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[RPC_F_RB_PATH]) + return rpc_errno_status(); + + path = blobmsg_data(tb[RPC_F_RB_PATH]); + + if (stat(path, &s)) return rpc_errno_status(); if (s.st_size >= RPC_FILE_MAX_SIZE) @@ -182,7 +206,13 @@ rpc_file_read(struct ubus_context *ctx, struct ubus_object *obj, blob_buf_init(&buf, 0); - wbuf = blobmsg_alloc_string_buffer(&buf, "data", s.st_size + 1); + if (tb[RPC_F_RB_BASE64]) + base64 = blobmsg_get_bool(tb[RPC_F_RB_BASE64]); + + len = s.st_size + 1; + if (base64) + len = B64_ENCODE_LEN(s.st_size); + wbuf = blobmsg_alloc_string_buffer(&buf, "data", len); if (!wbuf) { @@ -196,14 +226,33 @@ rpc_file_read(struct ubus_context *ctx, struct ubus_object *obj, goto out; } + if (base64) + { + uint8_t *data = calloc(len, sizeof(uint8_t)); + if (!data) + { + rv = UBUS_STATUS_UNKNOWN_ERROR; + goto out; + } + memcpy(data, wbuf, len); + + len = b64_encode(data, len, wbuf, B64_ENCODE_LEN(len)); + free(data); + if (len < 0) + { + rv = UBUS_STATUS_UNKNOWN_ERROR; + goto out; + } + } + *(wbuf + len) = 0; blobmsg_add_string_buffer(&buf); ubus_send_reply(ctx, req, buf.head); - blob_buf_free(&buf); rv = UBUS_STATUS_OK; out: + blob_buf_free(&buf); close(fd); return rv; } @@ -213,8 +262,10 @@ rpc_file_write(struct ubus_context *ctx, struct ubus_object *obj, struct ubus_request_data *req, const char *method, struct blob_attr *msg) { - int fd; struct blob_attr *tb[__RPC_F_RW_MAX]; + int fd, rv = 0; + void *data = NULL; + size_t data_len = 0; blobmsg_parse(rpc_file_rw_policy, __RPC_F_RW_MAX, tb, blob_data(msg), blob_len(msg)); @@ -222,18 +273,35 @@ rpc_file_write(struct ubus_context *ctx, struct ubus_object *obj, if (!tb[RPC_F_RW_PATH] || !tb[RPC_F_RW_DATA]) return UBUS_STATUS_INVALID_ARGUMENT; + data = blobmsg_data(tb[RPC_F_RW_DATA]); + data_len = blobmsg_data_len(tb[RPC_F_RW_DATA]) - 1; + if ((fd = open(blobmsg_data(tb[RPC_F_RW_PATH]), O_CREAT | O_TRUNC | O_WRONLY, 0666)) < 0) return rpc_errno_status(); - if (write(fd, blobmsg_data(tb[RPC_F_RW_DATA]), blobmsg_data_len(tb[RPC_F_RW_DATA])) < 0) - return rpc_errno_status(); + if (tb[RPC_F_RW_BASE64] && blobmsg_get_bool(tb[RPC_F_RW_BASE64])) + { + data_len = b64_decode(data, data, data_len); + if (data_len < 0) + { + rv = UBUS_STATUS_UNKNOWN_ERROR; + goto out; + } + } + + if (write(fd, data, data_len) < 0) + rv = -1; +out: if (fsync(fd) < 0) - return rpc_errno_status(); + rv = -1; close(fd); sync(); + if (rv) + return rpc_errno_status(); + return 0; } @@ -641,7 +709,7 @@ static int rpc_file_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx) { static const struct ubus_method file_methods[] = { - UBUS_METHOD("read", rpc_file_read, rpc_file_r_policy), + UBUS_METHOD("read", rpc_file_read, rpc_file_rb_policy), UBUS_METHOD("write", rpc_file_write, rpc_file_rw_policy), UBUS_METHOD("list", rpc_file_list, rpc_file_r_policy), UBUS_METHOD("stat", rpc_file_stat, rpc_file_r_policy), -- 2.25.1