Mercurial > hg > nginx-quic
annotate src/os/win32/ngx_udp_wsarecv.c @ 8456:c72d8839f427
Mail: fixed SMTP pipelining to send the response immediately.
Previously, if there were some pipelined SMTP data in the buffer when
a proxied connection with the backend was established, nginx called
ngx_mail_proxy_handler() to send these data, and not tried to send the
response to the last command. In most cases, this response was later sent
along with the response to the pipelined command, but if for some reason
client decides to wait for the response before finishing the next command
this might result in a connection hang.
Fix is to always call ngx_mail_proxy_handler() to send the response, and
additionally post an event to send the pipelined data if needed.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 19 May 2021 03:13:12 +0300 |
parents | d620f497c50f |
children |
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 |
1689 | 14 ngx_udp_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_event_t *rev; |
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21 |
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22 wsabuf[0].buf = (char *) buf; |
184
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23 wsabuf[0].len = size; |
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24 flags = 0; |
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25 bytes = 0; |
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26 |
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27 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, NULL, NULL); |
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28 |
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29 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 30 "WSARecv: fd:%d rc:%d %ul of %z", c->fd, rc, bytes, size); |
184
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31 |
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32 rev = c->read; |
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33 |
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34 if (rc == -1) { |
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35 rev->ready = 0; |
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36 err = ngx_socket_errno; |
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37 |
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38 if (err == WSAEWOULDBLOCK) { |
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39 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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40 "WSARecv() not ready"); |
184
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41 return NGX_AGAIN; |
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42 } |
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43 |
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44 rev->error = 1; |
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45 ngx_connection_error(c, err, "WSARecv() failed"); |
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46 |
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47 return NGX_ERROR; |
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48 } |
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49 |
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50 return bytes; |
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51 } |
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52 |
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53 |
1680 | 54 ssize_t |
1689 | 55 ngx_udp_overlapped_wsarecv(ngx_connection_t *c, u_char *buf, size_t size) |
184
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56 { |
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57 int rc; |
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58 u_long bytes, flags; |
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59 WSABUF wsabuf[1]; |
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60 ngx_err_t err; |
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61 ngx_event_t *rev; |
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62 LPWSAOVERLAPPED ovlp; |
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63 |
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64 rev = c->read; |
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65 |
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66 if (!rev->ready) { |
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67 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "second wsa post"); |
184
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68 return NGX_AGAIN; |
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69 } |
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70 |
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71 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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72 "rev->complete: %d", rev->complete); |
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73 |
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74 if (rev->complete) { |
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75 rev->complete = 0; |
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76 |
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77 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
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78 if (rev->ovlp.error) { |
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79 ngx_connection_error(c, rev->ovlp.error, "WSARecv() failed"); |
184
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80 return NGX_ERROR; |
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81 } |
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82 |
461 | 83 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
84 "WSARecv ovlp: fd:%d %ul of %z", | |
85 c->fd, rev->available, size); | |
86 | |
184
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87 return rev->available; |
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88 } |
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89 |
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90 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp, |
2776 | 91 &bytes, 0, NULL) |
92 == 0) | |
93 { | |
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94 ngx_connection_error(c, ngx_socket_errno, |
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95 "WSARecv() or WSAGetOverlappedResult() failed"); |
184
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96 return NGX_ERROR; |
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97 } |
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98 |
461 | 99 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
100 "WSARecv: fd:%d %ul of %z", c->fd, bytes, size); | |
101 | |
184
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102 return bytes; |
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103 } |
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104 |
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105 ovlp = (LPWSAOVERLAPPED) &rev->ovlp; |
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106 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); |
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107 wsabuf[0].buf = (char *) buf; |
184
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108 wsabuf[0].len = size; |
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109 flags = 0; |
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110 bytes = 0; |
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111 |
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112 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL); |
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113 |
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Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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114 rev->complete = 0; |
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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115 |
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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116 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 117 "WSARecv ovlp: fd:%d rc:%d %ul of %z", |
118 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
changeset
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119 |
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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120 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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121 err = ngx_socket_errno; |
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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122 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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123 rev->active = 1; |
461 | 124 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
125 "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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126 return NGX_AGAIN; |
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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127 } |
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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128 |
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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129 rev->error = 1; |
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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130 ngx_connection_error(c, err, "WSARecv() failed"); |
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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131 return NGX_ERROR; |
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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132 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
133 |
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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134 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
|
135 |
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 /* |
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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137 * 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
changeset
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138 * 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
changeset
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139 * 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
changeset
|
140 */ |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
141 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
142 rev->active = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
143 return NGX_AGAIN; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
144 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
145 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
146 rev->active = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
147 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
148 return bytes; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
149 } |