/** \file blob.c Macros and functions for blob handling. */
+#include <regex.h>
#include <fnmatch.h>
+#include <openssl/rc4.h>
+#include <osl.h>
+
#include "para.h"
#include "error.h"
+#include "crypt.h"
#include "string.h"
#include "afh.h"
#include "afs.h"
#include "net.h"
#include "ipc.h"
+#include "portable_io.h"
+
+/**
+ * Compare two osl objects pointing to unsigned integers of 32 bit size.
+ *
+ * \param obj1 Pointer to the first integer.
+ * \param obj2 Pointer to the second integer.
+ *
+ * \return The values required for an osl compare function.
+ *
+ * \sa osl_compare_func, osl_hash_compare().
+ */
+static int uint32_compare(const struct osl_object *obj1, const struct osl_object *obj2)
+{
+ uint32_t d1 = read_u32((const char *)obj1->data);
+ uint32_t d2 = read_u32((const char *)obj2->data);
+
+ if (d1 < d2)
+ return 1;
+ if (d1 > d2)
+ return -1;
+ return 0;
+}
static struct osl_column_description blob_cols[] = {
[BLOBCOL_ID] = {
}
};
+/** Define an osl table description for a blob table. */
+#define DEFINE_BLOB_TABLE_DESC(table_name) \
+ struct osl_table_description table_name ## _table_desc = { \
+ .name = #table_name, \
+ .num_columns = NUM_BLOB_COLUMNS, \
+ .flags = OSL_LARGE_TABLE, \
+ .column_descriptions = blob_cols \
+ };
+
+/** Define a pointer to an osl blob table with a canonical name. */
+#define DEFINE_BLOB_TABLE_PTR(table_name) struct osl_table *table_name ## _table;
+
+
+/** Define a blob table. */
+#define INIT_BLOB_TABLE(table_name) \
+ DEFINE_BLOB_TABLE_DESC(table_name); \
+ DEFINE_BLOB_TABLE_PTR(table_name);
+
/** \cond doxygen isn't smart enough to recognize these */
INIT_BLOB_TABLE(lyrics);
INIT_BLOB_TABLE(images);
if (!(lbad->flags & BLOB_LS_FLAG_LONG))
return para_printf(&lbad->pb, "%s\n", name);
- ret = osl_get_object(table, row, BLOBCOL_ID, &obj);
+ ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj));
if (ret < 0) {
para_printf(&lbad->pb, "%s: %s\n", name, para_strerror(-ret));
return ret;
free(lbad.pb.buf);
}
-static int com_lsblob(callback_function *f, int fd, int argc, char * const * const argv)
+static int com_lsblob(callback_function *f, struct rc4_context *rc4c, int argc, char * const * const argv)
{
uint32_t flags = 0;
struct osl_object options = {.data = &flags, .size = sizeof(flags)};
// if (argc > i)
// return -E_BLOB_SYNTAX;
return send_option_arg_callback_request(&options, argc - i,
- argv + i, f, send_result, &fd);
+ argv + i, f, rc4_send_result, rc4c);
}
static int cat_blob(struct osl_table *table, struct osl_row *row,
int ret = 0, ret2;
struct osl_object obj;
- ret = osl_open_disk_object(table, row, BLOBCOL_DEF, &obj);
+ ret = osl(osl_open_disk_object(table, row, BLOBCOL_DEF, &obj));
if (ret < 0)
return ret;
if (obj.size)
ret = pass_buffer_as_shm(obj.data, obj.size, data);
- ret2 = osl_close_disk_object(&obj);
+ ret2 = osl(osl_close_disk_object(&obj));
return (ret < 0)? ret : ret2;
}
for_each_matching_row(&pmd);
}
-static int com_catblob(callback_function *f, int fd, int argc,
+static int com_catblob(callback_function *f, struct rc4_context *rc4c, int argc,
char * const * const argv)
{
if (argc < 2)
return -E_BLOB_SYNTAX;
- return send_standard_callback_request(argc - 1, argv + 1, f, send_result, &fd);
+ return send_standard_callback_request(argc - 1, argv + 1, f,
+ rc4_send_result, rc4c);
}
/** Used for removing rows from a blob table. */
const char *name, void *data)
{
struct rmblob_data *rmbd = data;
- int ret = osl_del_row(table, row);
+ int ret = osl(osl_del_row(table, row));
if (ret < 0) {
para_printf(&rmbd->pb, "%s: %s\n", name, para_strerror(-ret));
return ret;
free(rmbd.pb.buf);
}
-static int com_rmblob(callback_function *f, int fd, int argc,
+static int com_rmblob(callback_function *f, struct rc4_context *rc4c, int argc,
char * const * const argv)
{
if (argc < 2)
return -E_MOOD_SYNTAX;
return send_option_arg_callback_request(NULL, argc - 1, argv + 1, f,
- send_result, &fd);
+ rc4_send_result, rc4c);
}
static void com_addblob_callback(struct osl_table *table, __a_unused int fd,
unsigned num_rows;
int ret;
- ret = osl_get_num_rows(table, &num_rows);
+ ret = osl(osl_get_num_rows(table, &num_rows));
if (ret < 0)
goto out;
if (!num_rows) { /* this is the first entry ever added */
objs[BLOBCOL_NAME].size = 1;
objs[BLOBCOL_DEF].data = "";
objs[BLOBCOL_DEF].size = 1;
- ret = osl_add_row(table, objs);
+ ret = osl(osl_add_row(table, objs));
if (ret < 0)
goto out;
} else {
/* check if name already exists */
struct osl_row *row;
struct osl_object obj = {.data = name, .size = name_len};
- ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row);
- if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
+ ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
+ if (ret < 0 && ret != -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND))
goto out;
if (ret >= 0) { /* we already have a blob with this name */
obj.data = name + name_len;
obj.size = query->size - name_len;
- ret = osl_update_object(table, row, BLOBCOL_DEF, &obj);
+ ret = osl(osl_update_object(table, row, BLOBCOL_DEF, &obj));
goto out;
}
/* new blob, get id of the dummy row and increment it */
obj.data = "";
obj.size = 1;
- ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row);
+ ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
if (ret < 0)
goto out;
- ret = osl_get_object(table, row, BLOBCOL_ID, &obj);
+ ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj));
if (ret < 0)
goto out;
id = *(uint32_t *)obj.data + 1;
obj.data = &id;
- ret = osl_update_object(table, row, BLOBCOL_ID, &obj);
+ ret = osl(osl_update_object(table, row, BLOBCOL_ID, &obj));
if (ret < 0)
goto out;
}
objs[BLOBCOL_NAME].size = name_len;
objs[BLOBCOL_DEF].data = name + name_len;
objs[BLOBCOL_DEF].size = query->size - name_len;
- ret = osl_add_row(table, objs);
+ ret = osl(osl_add_row(table, objs));
if (ret < 0)
goto out;
afs_event(BLOB_ADD, NULL, table);
PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
}
-static int com_addblob(callback_function *f, int fd, int argc,
+/*
+ * write input from fd to dynamically allocated buffer,
+ * but maximal max_size byte.
+ */
+static int fd2buf(struct rc4_context *rc4c, unsigned max_size, struct osl_object *obj)
+{
+ const size_t chunk_size = 1024;
+ size_t size = 2048, received = 0;
+ int ret;
+ char *buf = para_malloc(size);
+
+ for (;;) {
+ ret = rc4_recv_bin_buffer(rc4c, buf + received, chunk_size);
+ if (ret <= 0)
+ break;
+ received += ret;
+ if (received + chunk_size >= size) {
+ size *= 2;
+ ret = -E_INPUT_TOO_LARGE;
+ if (size > max_size)
+ break;
+ buf = para_realloc(buf, size);
+ }
+ }
+ obj->data = buf;
+ obj->size = received;
+ if (ret < 0)
+ free(buf);
+ return ret;
+}
+
+/*
+ * Read data from a file descriptor, and send it to the afs process.
+ *
+ * \param rc4c crypt context containing the file descriptor to read data from.
+ * \param arg_obj Pointer to the arguments to \a f.
+ * \param f The callback function.
+ * \param max_len Don't read more than that many bytes from stdin.
+ * \param result_handler See \ref send_callback_request.
+ * \param private_result_data See \ref send_callback_request.
+ *
+ * This function is used by commands that wish to let para_server store
+ * arbitrary data specified by the user (for instance the add_blob family of
+ * commands). First, at most \a max_len bytes are read and decrypted from the
+ * file descriptor given by \a rc4c. The result is concatenated with the buffer
+ * given by \a arg_obj, and the combined buffer is made available to the afs
+ * process via the callback method. See \ref send_callback_request for details.
+ *
+ * \return Negative on errors, the return value of the underlying call to
+ * send_callback_request() otherwise.
+ */
+static int stdin_command(struct rc4_context *rc4c, struct osl_object *arg_obj,
+ callback_function *f, unsigned max_len,
+ callback_result_handler *result_handler,
+ void *private_result_data)
+{
+ struct osl_object query, stdin_obj;
+ int ret;
+
+ ret = rc4_send_buffer(rc4c, AWAITING_DATA_MSG);
+ if (ret < 0)
+ return ret;
+ ret = fd2buf(rc4c, max_len, &stdin_obj);
+ if (ret < 0)
+ return ret;
+ query.size = arg_obj->size + stdin_obj.size;
+ query.data = para_malloc(query.size);
+ memcpy(query.data, arg_obj->data, arg_obj->size);
+ memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
+ free(stdin_obj.data);
+ ret = send_callback_request(f, &query, result_handler, private_result_data);
+ free(query.data);
+ return ret;
+}
+
+static int com_addblob(callback_function *f, struct rc4_context *rc4c, int argc,
char * const * const argv)
{
struct osl_object arg_obj;
return -E_BLOB_SYNTAX;
arg_obj.size = strlen(argv[1]) + 1;
arg_obj.data = (char *)argv[1];
- return stdin_command(fd, &arg_obj, f, 10 * 1024 * 1024, NULL, NULL);
+ return stdin_command(rc4c, &arg_obj, f, 10 * 1024 * 1024, NULL, NULL);
}
/* FIXME: Print output to client, not to log file */
struct osl_object obj = {.data = src, .size = strlen(src) + 1};
char *dest = src + obj.size;
struct osl_row *row;
- int ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row);
+ int ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
if (ret < 0)
goto out;
obj.data = dest;
obj.size = strlen(dest) + 1;
- ret = osl_update_object(table, row, BLOBCOL_NAME, &obj);
+ ret = osl(osl_update_object(table, row, BLOBCOL_NAME, &obj));
if (ret < 0)
goto out;
afs_event(BLOB_RENAME, NULL, table);
PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
}
-static int com_mvblob(callback_function *f, __a_unused int fd,
+static int com_mvblob(callback_function *f, __a_unused struct rc4_context *rc4c,
int argc, char * const * const argv)
{
if (argc != 3)
{ \
return com_ ## cmd_name ## blob_callback(table_name ## _table, fd, query); \
} \
- int com_ ## cmd_name ## cmd_prefix(int fd, int argc, char * const * const argv) \
+ int com_ ## cmd_name ## cmd_prefix(struct rc4_context *rc4c, int argc, char * const * const argv) \
{ \
- return com_ ## cmd_name ## blob(com_ ## cmd_name ## cmd_prefix ## _callback, fd, argc, argv); \
+ return com_ ## cmd_name ## blob(com_ ## cmd_name ## cmd_prefix ## _callback, rc4c, argc, argv); \
}
static int blob_get_name_by_id(struct osl_table *table, uint32_t id,
*name = NULL;
if (!id)
return 1;
- ret = osl_get_row(table, BLOBCOL_ID, &obj, &row);
+ ret = osl(osl_get_row(table, BLOBCOL_ID, &obj, &row));
if (ret < 0)
return ret;
- ret = osl_get_object(table, row, BLOBCOL_NAME, &obj);
+ ret = osl(osl_get_object(table, row, BLOBCOL_NAME, &obj));
if (ret < 0)
return ret;
*name = (char *)obj.data;
def->data = NULL;
if (!*name)
return 1;
- ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row);
+ ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
if (ret < 0)
return ret;
- return osl_open_disk_object(table, row, BLOBCOL_DEF, def);
+ return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def));
}
/** Define the \p get_def_by_id function for this blob type. */
def->data = NULL;
if (!id)
return 1;
- ret = osl_get_row(table, BLOBCOL_ID, &obj, &row);
+ ret = osl(osl_get_row(table, BLOBCOL_ID, &obj, &row));
if (ret < 0)
return ret;
- return osl_open_disk_object(table, row, BLOBCOL_DEF, def);
+ return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def));
}
/** Define the \p get_def_by_id function for this blob type. */
const struct osl_row *row, char **name, struct osl_object *def)
{
struct osl_object obj;
- int ret = osl_get_object(table, row, BLOBCOL_NAME, &obj);
+ int ret = osl(osl_get_object(table, row, BLOBCOL_NAME, &obj));
if (ret < 0)
return ret;
*name = obj.data;
- return osl_open_disk_object(table, row, BLOBCOL_DEF, def);
+ return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def));
}
/** Define the \p get_name_and_def_by_row function for this blob type. */
#define DEFINE_GET_NAME_AND_DEF_BY_ROW(table_name, cmd_prefix) \
/** Define the \p close function for this blob type. */
#define DEFINE_BLOB_CLOSE(table_name) \
- void table_name ## _close(void) \
+ static void table_name ## _close(void) \
{ \
osl_close_table(table_name ## _table, OSL_MARK_CLEAN); \
table_name ## _table = NULL; \
/** Define the \p create function for this blob type. */
#define DEFINE_BLOB_CREATE(table_name) \
- int table_name ## _create(const char *dir) \
+ static int table_name ## _create(const char *dir) \
{ \
table_name ## _table_desc.dir = dir; \
return osl_create_table(&table_name ## _table_desc); \
{
int ret;
desc->dir = dir;
- ret = osl_open_table(desc, table);
+ ret = osl(osl_open_table(desc, table));
if (ret >= 0)
return ret;
*table = NULL;
- if (ret >= 0 || is_errno(-ret, ENOENT))
+ if (ret >= 0 || ret == -OSL_ERRNO_TO_PARA_ERROR(E_OSL_NOENT))
return 1;
return ret;
}
#define DEFINE_BLOB_OPEN(table_name) \
- int table_name ## _open(const char *dir) \
+ static int table_name ## _open(const char *dir) \
{ \
return blob_open(&table_name ## _table, \
&table_name ## _table_desc, dir); \
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