ubus: increase message size limit and make it configurable at build-time

[project/ubus.git] / libubus-io.c

diff --git a/libubus-io.c b/libubus-io.c
index c63a9201cd713256ed6616b75427ff4f9087034e..48bb72db1963b7aef1b32e8018d207e0736cab10 100644 (file)
--- a/libubus-io.c
+++ b/libubus-io.c
@@ -233,6 +233,7 @@ static bool get_next_msg(struct ubus_context *ctx, int *recv_fd)
                struct blob_attr data;
        } hdrbuf;
        struct iovec iov = STATIC_IOV(hdrbuf);
+       int len;
        int r;
 
        /* receive header + start attribute */
@@ -247,6 +248,15 @@ static bool get_next_msg(struct ubus_context *ctx, int *recv_fd)
        if (!ubus_validate_hdr(&hdrbuf.hdr))
                return false;
 
+       len = blob_raw_len(&hdrbuf.data);
+       if (len > ctx->msgbuf_data_len) {
+               ctx->msgbuf.data = realloc(ctx->msgbuf.data, len * sizeof(char));
+               if (ctx->msgbuf.data)
+                       ctx->msgbuf_data_len = len;
+       }
+       if (!ctx->msgbuf.data)
+               return false;
+
        memcpy(&ctx->msgbuf.hdr, &hdrbuf.hdr, sizeof(hdrbuf.hdr));
        memcpy(ctx->msgbuf.data, &hdrbuf.data, sizeof(hdrbuf.data));