* GNU General Public License for more details.
*/
+#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
#define STATIC_IOV(_var) { .iov_base = (char *) &(_var), .iov_len = sizeof(_var) }
+#define UBUS_MSGBUF_REDUCTION_INTERVAL 16
+
static const struct blob_attr_info ubus_policy[UBUS_ATTR_MAX] = {
[UBUS_ATTR_STATUS] = { .type = BLOB_ATTR_INT32 },
[UBUS_ATTR_OBJID] = { .type = BLOB_ATTR_INT32 },
struct pollfd pfd = { .fd = fd };
pfd.events = write ? POLLOUT : POLLIN;
- poll(&pfd, 1, 0);
+ poll(&pfd, 1, -1);
}
static int writev_retry(int fd, struct iovec *iov, int iov_len, int sock_fd)
if (!iov_len)
return len;
}
+ iov->iov_base += cur_len;
iov->iov_len -= cur_len;
+ msghdr.msg_iov = iov;
+ msghdr.msg_iovlen = iov_len;
} while (1);
/* Should never reach here */
if (ret < 0)
ctx->sock.eof = true;
+ if (fd >= 0)
+ close(fd);
+
return ret;
}
static bool ubus_validate_hdr(struct ubus_msghdr *hdr)
{
- struct blob_attr *data = ubus_msghdr_data(hdr);
+ struct blob_attr *data = (struct blob_attr *) (hdr + 1);
if (hdr->version != 0)
return false;
return true;
}
+static bool alloc_msg_buf(struct ubus_context *ctx, int len)
+{
+ void *ptr;
+ int buf_len = ctx->msgbuf_data_len;
+ int rem;
+
+ if (!ctx->msgbuf.data)
+ buf_len = 0;
+
+ rem = (len % UBUS_MSG_CHUNK_SIZE);
+ if (rem > 0)
+ len += UBUS_MSG_CHUNK_SIZE - rem;
+
+ if (len < buf_len &&
+ ++ctx->msgbuf_reduction_counter > UBUS_MSGBUF_REDUCTION_INTERVAL) {
+ ctx->msgbuf_reduction_counter = 0;
+ buf_len = 0;
+ }
+
+ if (len <= buf_len)
+ return true;
+
+ ptr = realloc(ctx->msgbuf.data, len);
+ if (!ptr)
+ return false;
+
+ ctx->msgbuf.data = ptr;
+ return true;
+}
+
static bool get_next_msg(struct ubus_context *ctx, int *recv_fd)
{
- struct iovec iov = STATIC_IOV(ctx->msgbuf.hdr);
+ struct {
+ struct ubus_msghdr hdr;
+ struct blob_attr data;
+ } hdrbuf;
+ struct iovec iov = STATIC_IOV(hdrbuf);
+ int len;
int r;
/* receive header + start attribute */
- iov.iov_len += sizeof(struct blob_attr);
r = recv_retry(ctx->sock.fd, &iov, false, recv_fd);
if (r <= 0) {
if (r < 0)
return false;
}
- iov.iov_len = blob_len(ubus_msghdr_data(&ctx->msgbuf.hdr));
- if (iov.iov_len > 0 && !recv_retry(ctx->sock.fd, &iov, true, NULL))
+ if (!ubus_validate_hdr(&hdrbuf.hdr))
+ return false;
+
+ len = blob_raw_len(&hdrbuf.data);
+ if (!alloc_msg_buf(ctx, len))
+ return false;
+
+ memcpy(&ctx->msgbuf.hdr, &hdrbuf.hdr, sizeof(hdrbuf.hdr));
+ memcpy(ctx->msgbuf.data, &hdrbuf.data, sizeof(hdrbuf.data));
+
+ iov.iov_base = (char *)ctx->msgbuf.data + sizeof(hdrbuf.data);
+ iov.iov_len = blob_len(ctx->msgbuf.data);
+ if (iov.iov_len > 0 &&
+ recv_retry(ctx->sock.fd, &iov, true, NULL) <= 0)
return false;
- return ubus_validate_hdr(&ctx->msgbuf.hdr);
+ return true;
}
void __hidden ubus_handle_data(struct uloop_fd *u, unsigned int events)
{
struct ubus_context *ctx = container_of(u, struct ubus_context, sock);
- struct ubus_msghdr *hdr = &ctx->msgbuf.hdr;
int recv_fd = -1;
while (get_next_msg(ctx, &recv_fd)) {
- ubus_process_msg(ctx, hdr, recv_fd);
+ ubus_process_msg(ctx, &ctx->msgbuf, recv_fd);
if (uloop_cancelled)
break;
}
ctx->connection_lost(ctx);
}
+void __hidden ubus_poll_data(struct ubus_context *ctx, int timeout)
+{
+ struct pollfd pfd = {
+ .fd = ctx->sock.fd,
+ .events = POLLIN | POLLERR,
+ };
+
+ poll(&pfd, 1, timeout ? timeout : -1);
+ ubus_handle_data(&ctx->sock, ULOOP_READ);
+}
+
static void
ubus_refresh_state(struct ubus_context *ctx)
{
goto out_free;
ret = UBUS_STATUS_OK;
- fcntl(ctx->sock.fd, F_SETFL, fcntl(ctx->sock.fd, F_GETFL) | O_NONBLOCK);
+ fcntl(ctx->sock.fd, F_SETFL, fcntl(ctx->sock.fd, F_GETFL) | O_NONBLOCK | O_CLOEXEC);
ubus_refresh_state(ctx);