Mercurial > hg > nginx
annotate src/os/win32/ngx_wsarecv.c @ 7174:84e53e4735a4
Retain CAP_NET_RAW capability for transparent proxying.
The capability is retained automatically in unprivileged worker processes after
changing UID if transparent proxying is enabled at least once in nginx
configuration.
The feature is only available in Linux.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 13 Dec 2017 20:40:53 +0300 |
parents | 3d2d3e1cf427 |
children | efd71d49bde0 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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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_event.h> |
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11 |
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12 |
1680 | 13 ssize_t |
14 ngx_wsarecv(ngx_connection_t *c, u_char *buf, size_t size) | |
103
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15 { |
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16 int rc; |
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17 u_long bytes, flags; |
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18 WSABUF wsabuf[1]; |
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19 ngx_err_t err; |
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20 ngx_int_t n; |
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21 ngx_event_t *rev; |
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22 |
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23 wsabuf[0].buf = (char *) buf; |
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24 wsabuf[0].len = size; |
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25 flags = 0; |
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26 bytes = 0; |
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27 |
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28 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, NULL, NULL); |
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29 |
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30 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 31 "WSARecv: fd:%d rc:%d %ul of %z", c->fd, rc, bytes, size); |
184
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32 |
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33 rev = c->read; |
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34 |
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35 if (rc == -1) { |
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36 rev->ready = 0; |
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37 err = ngx_socket_errno; |
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38 |
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39 if (err == WSAEWOULDBLOCK) { |
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40 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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41 "WSARecv() not ready"); |
184
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42 return NGX_AGAIN; |
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43 } |
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44 |
2775 | 45 n = ngx_connection_error(c, err, "WSARecv() failed"); |
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46 |
3642 | 47 if (n == NGX_ERROR) { |
2775 | 48 rev->error = 1; |
49 } | |
50 | |
51 return n; | |
184
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52 } |
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53 |
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54 if (bytes < size) { |
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55 rev->ready = 0; |
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56 } |
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57 |
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58 if (bytes == 0) { |
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59 rev->eof = 1; |
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60 } |
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61 |
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62 return bytes; |
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63 } |
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64 |
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65 |
1680 | 66 ssize_t |
67 ngx_overlapped_wsarecv(ngx_connection_t *c, u_char *buf, size_t size) | |
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68 { |
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69 int rc; |
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70 u_long bytes, flags; |
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71 WSABUF wsabuf[1]; |
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72 ngx_err_t err; |
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73 ngx_int_t n; |
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74 ngx_event_t *rev; |
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75 LPWSAOVERLAPPED ovlp; |
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76 |
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77 rev = c->read; |
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78 |
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79 if (!rev->ready) { |
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80 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "second wsa post"); |
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81 return NGX_AGAIN; |
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82 } |
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83 |
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84 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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85 "rev->complete: %d", rev->complete); |
184
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86 |
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87 if (rev->complete) { |
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88 rev->complete = 0; |
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89 |
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90 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
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91 if (rev->ovlp.error) { |
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92 ngx_connection_error(c, rev->ovlp.error, "WSARecv() failed"); |
184
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93 return NGX_ERROR; |
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94 } |
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95 |
461 | 96 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
97 "WSARecv ovlp: fd:%d %ul of %z", | |
98 c->fd, rev->available, size); | |
99 | |
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100 return rev->available; |
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101 } |
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102 |
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103 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp, |
2776 | 104 &bytes, 0, NULL) |
105 == 0) | |
106 { | |
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107 ngx_connection_error(c, ngx_socket_errno, |
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108 "WSARecv() or WSAGetOverlappedResult() failed"); |
184
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109 return NGX_ERROR; |
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110 } |
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111 |
461 | 112 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
113 "WSARecv: fd:%d %ul of %z", c->fd, bytes, size); | |
114 | |
184
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115 return bytes; |
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116 } |
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117 |
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118 ovlp = (LPWSAOVERLAPPED) &rev->ovlp; |
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119 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); |
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120 wsabuf[0].buf = (char *) buf; |
184
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Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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121 wsabuf[0].len = size; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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122 flags = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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123 bytes = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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124 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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125 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL); |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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126 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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127 rev->complete = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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128 |
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
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129 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 130 "WSARecv ovlp: fd:%d rc:%d %ul of %z", |
131 c->fd, rc, bytes, size); | |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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132 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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133 if (rc == -1) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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134 err = ngx_socket_errno; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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135 if (err == WSA_IO_PENDING) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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136 rev->active = 1; |
461 | 137 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
138 "WSARecv() posted"); | |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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139 return NGX_AGAIN; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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140 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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141 |
2775 | 142 n = ngx_connection_error(c, err, "WSARecv() failed"); |
143 | |
3642 | 144 if (n == NGX_ERROR) { |
2775 | 145 rev->error = 1; |
146 } | |
147 | |
148 return n; | |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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149 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
150 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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151 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
152 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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153 /* |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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154 * if a socket was bound with I/O completion port |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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155 * then GetQueuedCompletionStatus() would anyway return its status |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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156 * despite that WSARecv() was already complete |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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157 */ |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
158 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
159 rev->active = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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160 return NGX_AGAIN; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
161 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
162 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
163 if (bytes == 0) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
164 rev->eof = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
165 rev->ready = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
166 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
167 } else { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
168 rev->ready = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
169 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
170 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
171 rev->active = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
172 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
173 return bytes; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
174 } |