Struct H2Limits 

pub struct H2Limits {
    pub max_header_list_size: usize,
    pub max_header_count: usize,
    pub max_header_value_size: usize,
    pub max_table_size: usize,
    pub max_concurrent_streams: usize,
    pub stream_timeout_ns: u64,
    pub max_body_size: usize,
    pub max_buffer_size: usize,
}

Configurable limits for HTTP/2 header decoding and stream management.

These limits defend against resource exhaustion from untrusted input (e.g., HPACK decompression bombs, stream flooding).

Fields

max_header_list_size: usize

Maximum total decoded header list size in bytes (default: 65536, RFC 7540 default)

max_header_count: usize

Maximum number of headers per HEADERS block (default: 128)

max_header_value_size: usize

Maximum size of any individual header value in bytes (default: 8192)

max_table_size: usize

Hard cap for HPACK dynamic table size (default: 65536)

max_concurrent_streams: usize

Maximum concurrent active streams before rejecting new ones (default: 100)

stream_timeout_ns: u64

Stream timeout in nanoseconds — streams older than this are evicted (default: 30s)

max_body_size: usize

Maximum accumulated body size per stream in bytes (default: 10 MiB). Streams exceeding this limit are dropped to prevent memory exhaustion.

max_buffer_size: usize

Maximum buffer size for incremental parsing in bytes. Rejects data that would grow the internal buffer beyond this limit. Default: 1 MiB. This bounds per-connection memory while allowing normal TCP read sizes and multi-frame chunks to be fed at once.

Trait Implementations

impl Clone for H2Limits

fn clone(&self) -> H2Limits

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for H2Limits

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for H2Limits

fn default() -> Self

Returns the “default value” for a type.