Mercurial > hg > nginx
view src/http/v3/ngx_http_v3_encode.c @ 8795:278ab0ed24f2 quic
HTTP/3: generate more H3_FRAME_UNEXPECTED.
As per quic-http-34, these are the cases when this error should be generated:
If an endpoint receives a second SETTINGS frame
on the control stream, the endpoint MUST respond with a connection
error of type H3_FRAME_UNEXPECTED
SETTINGS frames MUST NOT be sent on any stream other than the control
stream. If an endpoint receives a SETTINGS frame on a different
stream, the endpoint MUST respond with a connection error of type
H3_FRAME_UNEXPECTED.
A client MUST NOT send a PUSH_PROMISE frame. A server MUST treat the
receipt of a PUSH_PROMISE frame as a connection error of type
H3_FRAME_UNEXPECTED; see Section 8.
The MAX_PUSH_ID frame is always sent on the control stream. Receipt
of a MAX_PUSH_ID frame on any other stream MUST be treated as a
connection error of type H3_FRAME_UNEXPECTED.
Receipt of an invalid sequence of frames MUST be treated as a
connection error of type H3_FRAME_UNEXPECTED; see Section 8. In
particular, a DATA frame before any HEADERS frame, or a HEADERS or
DATA frame after the trailing HEADERS frame, is considered invalid.
A CANCEL_PUSH frame is sent on the control stream. Receiving a
CANCEL_PUSH frame on a stream other than the control stream MUST be
treated as a connection error of type H3_FRAME_UNEXPECTED.
The GOAWAY frame is always sent on the control stream.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Fri, 11 Jun 2021 12:11:08 +0300 |
parents | 985f9351dd87 |
children | 0ac25efb2da3 |
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/* * Copyright (C) Roman Arutyunyan * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> uintptr_t ngx_http_v3_encode_varlen_int(u_char *p, uint64_t value) { if (value <= 63) { if (p == NULL) { return 1; } *p++ = value; return (uintptr_t) p; } if (value <= 16383) { if (p == NULL) { return 2; } *p++ = 0x40 | (value >> 8); *p++ = value; return (uintptr_t) p; } if (value <= 1073741823) { if (p == NULL) { return 4; } *p++ = 0x80 | (value >> 24); *p++ = (value >> 16); *p++ = (value >> 8); *p++ = value; return (uintptr_t) p; } if (p == NULL) { return 8; } *p++ = 0xc0 | (value >> 56); *p++ = (value >> 48); *p++ = (value >> 40); *p++ = (value >> 32); *p++ = (value >> 24); *p++ = (value >> 16); *p++ = (value >> 8); *p++ = value; return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_prefix_int(u_char *p, uint64_t value, ngx_uint_t prefix) { ngx_uint_t thresh, n; thresh = (1 << prefix) - 1; if (value < thresh) { if (p == NULL) { return 1; } *p++ |= value; return (uintptr_t) p; } value -= thresh; if (p == NULL) { for (n = 2; value >= 128; n++) { value >>= 7; } return n; } *p++ |= thresh; while (value >= 128) { *p++ = 0x80 | value; value >>= 7; } *p++ = value; return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_header_block_prefix(u_char *p, ngx_uint_t insert_count, ngx_uint_t sign, ngx_uint_t delta_base) { if (p == NULL) { return ngx_http_v3_encode_prefix_int(NULL, insert_count, 8) + ngx_http_v3_encode_prefix_int(NULL, delta_base, 7); } *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, insert_count, 8); *p = sign ? 0x80 : 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, delta_base, 7); return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_header_ri(u_char *p, ngx_uint_t dynamic, ngx_uint_t index) { /* Indexed Header Field */ if (p == NULL) { return ngx_http_v3_encode_prefix_int(NULL, index, 6); } *p = dynamic ? 0x80 : 0xc0; return ngx_http_v3_encode_prefix_int(p, index, 6); } uintptr_t ngx_http_v3_encode_header_lri(u_char *p, ngx_uint_t dynamic, ngx_uint_t index, u_char *data, size_t len) { /* Literal Header Field With Name Reference */ if (p == NULL) { return ngx_http_v3_encode_prefix_int(NULL, index, 4) + ngx_http_v3_encode_prefix_int(NULL, len, 7) + len; } *p = dynamic ? 0x40 : 0x50; p = (u_char *) ngx_http_v3_encode_prefix_int(p, index, 4); *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, len, 7); if (data) { p = ngx_cpymem(p, data, len); } return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_header_l(u_char *p, ngx_str_t *name, ngx_str_t *value) { /* Literal Header Field Without Name Reference */ if (p == NULL) { return ngx_http_v3_encode_prefix_int(NULL, name->len, 3) + name->len + ngx_http_v3_encode_prefix_int(NULL, value->len, 7) + value->len; } *p = 0x20; p = (u_char *) ngx_http_v3_encode_prefix_int(p, name->len, 3); ngx_strlow(p, name->data, name->len); p += name->len; *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, value->len, 7); p = ngx_cpymem(p, value->data, value->len); return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_header_pbi(u_char *p, ngx_uint_t index) { /* Indexed Header Field With Post-Base Index */ if (p == NULL) { return ngx_http_v3_encode_prefix_int(NULL, index, 4); } *p = 0x10; return ngx_http_v3_encode_prefix_int(p, index, 4); } uintptr_t ngx_http_v3_encode_header_lpbi(u_char *p, ngx_uint_t index, u_char *data, size_t len) { /* Literal Header Field With Post-Base Name Reference */ if (p == NULL) { return ngx_http_v3_encode_prefix_int(NULL, index, 3) + ngx_http_v3_encode_prefix_int(NULL, len, 7) + len; } *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, index, 3); *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, len, 7); if (data) { p = ngx_cpymem(p, data, len); } return (uintptr_t) p; }