Mercurial > hg > nginx
view src/http/v3/ngx_http_v3_encode.c @ 8902:925572184d4a quic
HTTP/3: adjusted QUIC connection finalization.
When an HTTP/3 function returns an error in context of a QUIC stream, it's
this function's responsibility now to finalize the entire QUIC connection
with the right code, if required. Previously, QUIC connection finalization
could be done both outside and inside such functions. The new rule follows
a similar rule for logging, leads to cleaner code, and allows to provide more
details about the error.
While here, a few error cases are no longer treated as fatal and QUIC connection
is no longer finalized in these cases. A few other cases now lead to
stream reset instead of connection finalization.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 18 Oct 2021 15:22:33 +0300 |
parents | b5a305db30e0 |
children | 5c86189a1c1b |
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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_field_section_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_field_ri(u_char *p, ngx_uint_t dynamic, ngx_uint_t index) { /* Indexed Field Line */ 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_field_lri(u_char *p, ngx_uint_t dynamic, ngx_uint_t index, u_char *data, size_t len) { size_t hlen; u_char *p1, *p2; /* Literal Field Line 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); p1 = p; *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, len, 7); if (data) { p2 = p; hlen = ngx_http_v2_huff_encode(data, len, p, 0); if (hlen) { p = p1; *p = 0x80; p = (u_char *) ngx_http_v3_encode_prefix_int(p, hlen, 7); if (p != p2) { ngx_memmove(p, p2, hlen); } p += hlen; } else { p = ngx_cpymem(p, data, len); } } return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_field_l(u_char *p, ngx_str_t *name, ngx_str_t *value) { size_t hlen; u_char *p1, *p2; /* Literal Field Line With Literal Name */ 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; } p1 = p; *p = 0x20; p = (u_char *) ngx_http_v3_encode_prefix_int(p, name->len, 3); p2 = p; hlen = ngx_http_v2_huff_encode(name->data, name->len, p, 1); if (hlen) { p = p1; *p = 0x28; p = (u_char *) ngx_http_v3_encode_prefix_int(p, hlen, 3); if (p != p2) { ngx_memmove(p, p2, hlen); } p += hlen; } else { ngx_strlow(p, name->data, name->len); p += name->len; } p1 = p; *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, value->len, 7); p2 = p; hlen = ngx_http_v2_huff_encode(value->data, value->len, p, 0); if (hlen) { p = p1; *p = 0x80; p = (u_char *) ngx_http_v3_encode_prefix_int(p, hlen, 7); if (p != p2) { ngx_memmove(p, p2, hlen); } p += hlen; } else { p = ngx_cpymem(p, value->data, value->len); } return (uintptr_t) p; } uintptr_t ngx_http_v3_encode_field_pbi(u_char *p, ngx_uint_t index) { /* Indexed Field Line 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_field_lpbi(u_char *p, ngx_uint_t index, u_char *data, size_t len) { size_t hlen; u_char *p1, *p2; /* Literal Field Line 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); p1 = p; *p = 0; p = (u_char *) ngx_http_v3_encode_prefix_int(p, len, 7); if (data) { p2 = p; hlen = ngx_http_v2_huff_encode(data, len, p, 0); if (hlen) { p = p1; *p = 0x80; p = (u_char *) ngx_http_v3_encode_prefix_int(p, hlen, 7); if (p != p2) { ngx_memmove(p, p2, hlen); } p += hlen; } else { p = ngx_cpymem(p, data, len); } } return (uintptr_t) p; }