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annotate src/http/v2/ngx_http_v2_encode.c @ 7673:c5840ca2063d

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HTTP/2: lingering close after GOAWAY. After sending the GOAWAY frame, a connection is now closed using the lingering close mechanism. This allows for the reliable delivery of the GOAWAY frames, while also fixing connection resets observed when http2_max_requests is reached (ticket #1250), or with graceful shutdown (ticket #1544), when some additional data from the client is received on a fully closed connection. For HTTP/2, the settings lingering_close, lingering_timeout, and lingering_time are taken from the "server" level.
author Ruslan Ermilov <ru@nginx.com>
date Fri, 03 Jul 2020 16:16:47 +0300
parents 87e9e4aabf1b
children 336084ff943b
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1
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 * Copyright (C) Valentin V. Bartenev
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5 */
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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13 static u_char *ngx_http_v2_write_int(u_char *pos, ngx_uint_t prefix,
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14 ngx_uint_t value);
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17 u_char *
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18 ngx_http_v2_string_encode(u_char *dst, u_char *src, size_t len, u_char *tmp,
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19 ngx_uint_t lower)
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20 {
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21 size_t hlen;
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22
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23 hlen = ngx_http_v2_huff_encode(src, len, tmp, lower);
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25 if (hlen > 0) {
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26 *dst = NGX_HTTP_V2_ENCODE_HUFF;
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27 dst = ngx_http_v2_write_int(dst, ngx_http_v2_prefix(7), hlen);
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28 return ngx_cpymem(dst, tmp, hlen);
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29 }
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31 *dst = NGX_HTTP_V2_ENCODE_RAW;
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32 dst = ngx_http_v2_write_int(dst, ngx_http_v2_prefix(7), len);
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33
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34 if (lower) {
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35 ngx_strlow(dst, src, len);
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36 return dst + len;
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37 }
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38
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39 return ngx_cpymem(dst, src, len);
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40 }
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43 static u_char *
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44 ngx_http_v2_write_int(u_char *pos, ngx_uint_t prefix, ngx_uint_t value)
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45 {
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46 if (value < prefix) {
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47 *pos++ |= value;
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48 return pos;
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49 }
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51 *pos++ |= prefix;
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52 value -= prefix;
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54 while (value >= 128) {
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55 *pos++ = value % 128 + 128;
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56 value /= 128;
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57 }
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59 *pos++ = (u_char) value;
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61 return pos;
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62 }