Mercurial > hg > nginx-quic
annotate src/os/win32/ngx_wsarecv_chain.c @ 8457:6a81d96d3733
Mail: fixed handling of invalid SMTP commands split between reads.
Previously, if an invalid SMTP command was split between reads, nginx failed
to wait for LF before returning an error, and interpreted the rest of the
command received later as a separate command.
The sw_invalid state in ngx_mail_smtp_parse_command(), introduced in
04e43d03e153, did not work, since ngx_mail_smtp_auth_state() clears
s->state when returning an error due to NGX_MAIL_PARSE_INVALID_COMMAND.
And not clearing s->state will introduce another problem: the rest
of the command would trigger duplicate error when rest of the command is
received.
Fix is to return NGX_AGAIN from ngx_mail_smtp_parse_command() until full
command is received.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 19 May 2021 03:13:15 +0300 |
parents | efd71d49bde0 |
children | ecf2a9002b37 |
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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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 |
577 | 13 #define NGX_WSABUFS 8 |
501 | 14 |
15 | |
16 ssize_t | |
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17 ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain, off_t limit) |
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18 { |
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19 int rc; |
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20 u_char *prev; |
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21 u_long bytes, flags; |
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22 size_t n, size; |
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23 ngx_err_t err; |
501 | 24 ngx_array_t vec; |
186
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25 ngx_event_t *rev; |
501 | 26 LPWSABUF wsabuf; |
27 WSABUF wsabufs[NGX_WSABUFS]; | |
186
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28 |
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29 prev = NULL; |
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30 wsabuf = NULL; |
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31 flags = 0; |
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32 size = 0; |
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33 bytes = 0; |
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34 |
501 | 35 vec.elts = wsabufs; |
36 vec.nelts = 0; | |
37 vec.size = sizeof(WSABUF); | |
577 | 38 vec.nalloc = NGX_WSABUFS; |
501 | 39 vec.pool = c->pool; |
186
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40 |
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41 /* coalesce the neighbouring bufs */ |
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42 |
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43 while (chain) { |
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44 n = chain->buf->end - chain->buf->last; |
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45 |
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46 if (limit) { |
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47 if (size >= (size_t) limit) { |
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48 break; |
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49 } |
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50 |
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51 if (size + n > (size_t) limit) { |
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52 n = (size_t) limit - size; |
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53 } |
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54 } |
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55 |
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56 if (prev == chain->buf->last) { |
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57 wsabuf->len += n; |
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58 |
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59 } else { |
501 | 60 wsabuf = ngx_array_push(&vec); |
61 if (wsabuf == NULL) { | |
62 return NGX_ERROR; | |
63 } | |
64 | |
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65 wsabuf->buf = (char *) chain->buf->last; |
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66 wsabuf->len = n; |
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67 } |
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68 |
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69 size += n; |
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70 prev = chain->buf->end; |
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71 chain = chain->next; |
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72 } |
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73 |
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74 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
501 | 75 "WSARecv: %d:%d", vec.nelts, wsabuf->len); |
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76 |
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77 |
501 | 78 rc = WSARecv(c->fd, vec.elts, vec.nelts, &bytes, &flags, NULL, NULL); |
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79 |
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80 rev = c->read; |
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81 |
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82 if (rc == -1) { |
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83 rev->ready = 0; |
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84 err = ngx_socket_errno; |
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85 |
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86 if (err == WSAEWOULDBLOCK) { |
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87 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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88 "WSARecv() not ready"); |
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89 return NGX_AGAIN; |
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90 } |
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91 |
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92 rev->error = 1; |
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93 ngx_connection_error(c, err, "WSARecv() failed"); |
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94 return NGX_ERROR; |
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95 } |
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96 |
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97 #if (NGX_HAVE_FIONREAD) |
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98 |
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99 if (rev->available >= 0 && bytes > 0) { |
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100 rev->available -= bytes; |
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101 |
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102 /* |
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103 * negative rev->available means some additional bytes |
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104 * were received between kernel notification and WSARecv(), |
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105 * and therefore ev->ready can be safely reset even for |
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106 * edge-triggered event methods |
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107 */ |
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108 |
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109 if (rev->available < 0) { |
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110 rev->available = 0; |
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111 rev->ready = 0; |
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112 } |
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113 |
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114 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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115 "WSARecv: avail:%d", rev->available); |
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116 |
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117 } else if (bytes == size) { |
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118 |
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119 if (ngx_socket_nread(c->fd, &rev->available) == -1) { |
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120 rev->error = 1; |
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121 ngx_connection_error(c, ngx_socket_errno, |
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Events: available bytes calculation via ioctl(FIONREAD).
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122 ngx_socket_nread_n " failed"); |
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Events: available bytes calculation via ioctl(FIONREAD).
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123 return NGX_ERROR; |
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Events: available bytes calculation via ioctl(FIONREAD).
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parents:
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124 } |
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Events: available bytes calculation via ioctl(FIONREAD).
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parents:
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125 |
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Events: available bytes calculation via ioctl(FIONREAD).
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126 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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Events: available bytes calculation via ioctl(FIONREAD).
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127 "WSARecv: avail:%d", rev->available); |
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Events: available bytes calculation via ioctl(FIONREAD).
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128 } |
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Events: available bytes calculation via ioctl(FIONREAD).
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129 |
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Events: available bytes calculation via ioctl(FIONREAD).
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130 #endif |
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Events: available bytes calculation via ioctl(FIONREAD).
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131 |
186
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132 if (bytes < size) { |
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nginx-0.0.1-2003-11-17-00:49:42 import
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133 rev->ready = 0; |
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134 } |
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135 |
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136 if (bytes == 0) { |
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137 rev->eof = 1; |
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138 } |
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139 |
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140 return bytes; |
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141 } |