Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_recv.c @ 6651:7d4e33092e2a
Always seed PRNG with PID, seconds, and milliseconds.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Thu, 04 Aug 2016 23:43:10 +0300 |
parents | f7849bfb6d21 |
children | efd71d49bde0 |
rev | line source |
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441
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1 |
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2 /* |
444
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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_unix_recv(ngx_connection_t *c, u_char *buf, size_t size) | |
91
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15 { |
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16 ssize_t n; |
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17 ngx_err_t err; |
96
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18 ngx_event_t *rev; |
91
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19 |
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20 rev = c->read; |
91
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21 |
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22 #if (NGX_HAVE_KQUEUE) |
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23 |
455 | 24 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
218
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25 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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26 "recv: eof:%d, avail:%d, err:%d", |
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27 rev->pending_eof, rev->available, rev->kq_errno); |
91
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28 |
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29 if (rev->available == 0) { |
587 | 30 if (rev->pending_eof) { |
148
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31 rev->ready = 0; |
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32 rev->eof = 1; |
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33 |
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34 if (rev->kq_errno) { |
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35 rev->error = 1; |
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36 ngx_set_socket_errno(rev->kq_errno); |
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37 |
537 | 38 return ngx_connection_error(c, rev->kq_errno, |
39 "kevent() reported about an closed connection"); | |
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40 } |
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41 |
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42 return 0; |
587 | 43 |
44 } else { | |
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45 rev->ready = 0; |
587 | 46 return NGX_AGAIN; |
96
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47 } |
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48 } |
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49 } |
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50 |
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51 #endif |
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52 |
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53 #if (NGX_HAVE_EPOLLRDHUP) |
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54 |
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55 if (ngx_event_flags & NGX_USE_EPOLL_EVENT) { |
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56 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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57 "recv: eof:%d, avail:%d", |
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58 rev->pending_eof, rev->available); |
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59 |
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60 if (!rev->available && !rev->pending_eof) { |
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61 rev->ready = 0; |
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62 return NGX_AGAIN; |
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63 } |
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64 } |
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65 |
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66 #endif |
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67 |
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68 do { |
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69 n = recv(c->fd, buf, size, 0); |
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70 |
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71 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
6480 | 72 "recv: fd:%d %z of %uz", c->fd, n, size); |
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73 |
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74 if (n == 0) { |
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75 rev->ready = 0; |
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76 rev->eof = 1; |
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77 |
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78 #if (NGX_HAVE_KQUEUE) |
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79 |
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80 /* |
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81 * on FreeBSD recv() may return 0 on closed socket |
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82 * even if kqueue reported about available data |
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83 */ |
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84 |
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85 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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86 rev->available = 0; |
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87 } |
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88 |
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89 #endif |
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90 |
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91 return 0; |
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92 } |
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93 |
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94 if (n > 0) { |
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95 |
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96 #if (NGX_HAVE_KQUEUE) |
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97 |
455 | 98 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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99 rev->available -= n; |
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100 |
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101 /* |
583 | 102 * rev->available may be negative here because some additional |
587 | 103 * bytes may be received between kevent() and recv() |
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104 */ |
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105 |
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106 if (rev->available <= 0) { |
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107 if (!rev->pending_eof) { |
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108 rev->ready = 0; |
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109 } |
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110 |
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111 rev->available = 0; |
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112 } |
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113 |
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114 return n; |
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115 } |
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116 |
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117 #endif |
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118 |
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119 #if (NGX_HAVE_EPOLLRDHUP) |
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120 |
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121 if ((ngx_event_flags & NGX_USE_EPOLL_EVENT) |
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122 && ngx_use_epoll_rdhup) |
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123 { |
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124 if ((size_t) n < size) { |
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125 if (!rev->pending_eof) { |
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126 rev->ready = 0; |
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127 } |
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128 |
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129 rev->available = 0; |
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130 } |
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131 |
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132 return n; |
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133 } |
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134 |
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135 #endif |
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136 |
5267
13c006f0c40e
Events: honor NGX_USE_GREEDY_EVENT when kqueue support is enabled.
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diff
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137 if ((size_t) n < size |
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138 && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) |
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139 { |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
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140 rev->ready = 0; |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
|
141 } |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
|
142 |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
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143 return n; |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
144 } |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
145 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
146 err = ngx_socket_errno; |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
147 |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
148 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
257
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
256
diff
changeset
|
149 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
150 "recv() not ready"); |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
151 n = NGX_AGAIN; |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
152 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
153 } else { |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
154 n = ngx_connection_error(c, err, "recv() failed"); |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
155 break; |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
156 } |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
157 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
158 } while (err == NGX_EINTR); |
188
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
159 |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
160 rev->ready = 0; |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
161 |
3642 | 162 if (n == NGX_ERROR) { |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
163 rev->error = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
164 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
165 |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
166 return n; |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
167 } |