swarm/network, swarm/storage: validate chunk size (#17397)

* swarm/network, swarm/storage: validate default chunk size

* swarm/bmt, swarm/network, swarm/storage: update BMT hash initialisation

* swarm/bmt: move segmentCount to tests

* swarm/chunk: change chunk.DefaultSize to be untyped const

* swarm/storage: add size validator

* swarm/storage: add chunk size validation to localstore

* swarm/storage: move validation from localstore to validator

* swarm/storage: global chunk rules in MRU

1 files changed, 1 insertions, 4 deletions

diff --git a/swarm/bmt/bmt.go b/swarm/bmt/bmt.go
index 97e0e141e..a85d4369e 100644
--- a/swarm/bmt/bmt.go
+++ b/swarm/bmt/bmt.go
@@ -55,9 +55,6 @@ Two implementations are provided:
 */
 
 const (
-	// SegmentCount is the maximum number of segments of the underlying chunk
-	// Should be equal to max-chunk-data-size / hash-size
-	SegmentCount = 128
 	// PoolSize is the maximum number of bmt trees used by the hashers, i.e,
 	// the maximum number of concurrent BMT hashing operations performed by the same hasher
 	PoolSize = 8
@@ -318,7 +315,7 @@ func (h *Hasher) Sum(b []byte) (s []byte) {
 // with every full segment calls writeSection in a go routine
 func (h *Hasher) Write(b []byte) (int, error) {
 	l := len(b)
-	if l == 0 || l > 4096 {
+	if l == 0 || l > h.pool.Size {
 		return 0, nil
 	}
 	t := h.getTree()