Mercurial > hg > nginx
annotate src/core/ngx_proxy_protocol.c @ 7142:b9d919b53593 stable-1.12
Stream: relaxed next upstream condition (ticket #1317).
When switching to a next upstream, some buffers could be stuck in the middle
of the filter chain. A condition existed that raised an error when this
happened. As it turned out, this condition prevented switching to a next
upstream if ssl preread was used with the TCP protocol (see the ticket).
In fact, the condition does not make sense for TCP, since after successful
connection to an upstream switching to another upstream never happens. As for
UDP, the issue with stuck buffers is unlikely to happen, but is still possible.
Specifically, if a filter delays sending data to upstream.
The condition can be relaxed to only check the "buffered" bitmask of the
upstream connection. The new condition is simpler and fixes the ticket issue
as well. Additionally, the upstream_out chain is now reset for UDP prior to
connecting to a new upstream to prevent repeating the client data twice.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 11 Sep 2017 15:32:31 +0300 |
parents | b3b7e33083ac |
children | 416953ef0428 |
rev | line source |
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Added server-side support for PROXY protocol v1 (ticket #355).
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parents:
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1 |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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2 /* |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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3 * Copyright (C) Roman Arutyunyan |
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Added server-side support for PROXY protocol v1 (ticket #355).
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4 * Copyright (C) Nginx, Inc. |
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Added server-side support for PROXY protocol v1 (ticket #355).
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5 */ |
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Added server-side support for PROXY protocol v1 (ticket #355).
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6 |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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7 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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Added server-side support for PROXY protocol v1 (ticket #355).
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10 |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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11 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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12 u_char * |
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Core: renamed ngx_proxy_protocol_parse to ngx_proxy_protocol_read.
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13 ngx_proxy_protocol_read(ngx_connection_t *c, u_char *buf, u_char *last) |
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Added server-side support for PROXY protocol v1 (ticket #355).
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14 { |
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15 size_t len; |
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16 u_char ch, *p, *addr, *port; |
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17 ngx_int_t n; |
5605
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Added server-side support for PROXY protocol v1 (ticket #355).
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18 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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19 p = buf; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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20 len = last - buf; |
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21 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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22 if (len < 8 || ngx_strncmp(p, "PROXY ", 6) != 0) { |
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23 goto invalid; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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24 } |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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25 |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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26 p += 6; |
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27 len -= 6; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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28 |
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29 if (len >= 7 && ngx_strncmp(p, "UNKNOWN", 7) == 0) { |
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Added server-side support for PROXY protocol v1 (ticket #355).
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30 ngx_log_debug0(NGX_LOG_DEBUG_CORE, c->log, 0, |
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31 "PROXY protocol unknown protocol"); |
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32 p += 7; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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33 goto skip; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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34 } |
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Added server-side support for PROXY protocol v1 (ticket #355).
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35 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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36 if (len < 5 || ngx_strncmp(p, "TCP", 3) != 0 |
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37 || (p[3] != '4' && p[3] != '6') || p[4] != ' ') |
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Added server-side support for PROXY protocol v1 (ticket #355).
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38 { |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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39 goto invalid; |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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40 } |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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41 |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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42 p += 5; |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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43 addr = p; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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44 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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45 for ( ;; ) { |
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46 if (p == last) { |
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47 goto invalid; |
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48 } |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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49 |
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50 ch = *p++; |
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51 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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52 if (ch == ' ') { |
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53 break; |
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Added server-side support for PROXY protocol v1 (ticket #355).
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54 } |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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55 |
3a72b1805c52
Added server-side support for PROXY protocol v1 (ticket #355).
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56 if (ch != ':' && ch != '.' |
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57 && (ch < 'a' || ch > 'f') |
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58 && (ch < 'A' || ch > 'F') |
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59 && (ch < '0' || ch > '9')) |
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60 { |
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61 goto invalid; |
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62 } |
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63 } |
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Added server-side support for PROXY protocol v1 (ticket #355).
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64 |
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65 len = p - addr - 1; |
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66 c->proxy_protocol_addr.data = ngx_pnalloc(c->pool, len); |
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67 |
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Added server-side support for PROXY protocol v1 (ticket #355).
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68 if (c->proxy_protocol_addr.data == NULL) { |
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69 return NULL; |
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70 } |
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71 |
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72 ngx_memcpy(c->proxy_protocol_addr.data, addr, len); |
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73 c->proxy_protocol_addr.len = len; |
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74 |
6561
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75 for ( ;; ) { |
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76 if (p == last) { |
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77 goto invalid; |
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78 } |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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79 |
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Added the $proxy_protocol_port variable.
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80 if (*p++ == ' ') { |
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81 break; |
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82 } |
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83 } |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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84 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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85 port = p; |
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86 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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87 for ( ;; ) { |
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Added the $proxy_protocol_port variable.
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88 if (p == last) { |
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89 goto invalid; |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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90 } |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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91 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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92 if (*p++ == ' ') { |
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Added the $proxy_protocol_port variable.
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93 break; |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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94 } |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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95 } |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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96 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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97 len = p - port - 1; |
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Added the $proxy_protocol_port variable.
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98 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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99 n = ngx_atoi(port, len); |
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Added the $proxy_protocol_port variable.
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100 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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101 if (n < 0 || n > 65535) { |
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Added the $proxy_protocol_port variable.
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102 goto invalid; |
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Added the $proxy_protocol_port variable.
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parents:
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103 } |
28c76d9d75b7
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104 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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105 c->proxy_protocol_port = (in_port_t) n; |
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Added the $proxy_protocol_port variable.
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106 |
28c76d9d75b7
Added the $proxy_protocol_port variable.
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107 ngx_log_debug2(NGX_LOG_DEBUG_CORE, c->log, 0, |
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Added the $proxy_protocol_port variable.
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108 "PROXY protocol address: %V %i", &c->proxy_protocol_addr, n); |
5605
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Added server-side support for PROXY protocol v1 (ticket #355).
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109 |
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110 skip: |
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Added server-side support for PROXY protocol v1 (ticket #355).
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111 |
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112 for ( /* void */ ; p < last - 1; p++) { |
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113 if (p[0] == CR && p[1] == LF) { |
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114 return p + 2; |
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115 } |
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116 } |
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117 |
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118 invalid: |
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119 |
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120 ngx_log_error(NGX_LOG_ERR, c->log, 0, |
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121 "broken header: \"%*s\"", (size_t) (last - buf), buf); |
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122 |
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123 return NULL; |
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124 } |
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125 |
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126 |
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127 u_char * |
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128 ngx_proxy_protocol_write(ngx_connection_t *c, u_char *buf, u_char *last) |
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129 { |
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130 ngx_uint_t port, lport; |
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131 |
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132 if (last - buf < NGX_PROXY_PROTOCOL_MAX_HEADER) { |
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133 return NULL; |
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134 } |
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135 |
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136 if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) { |
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137 return NULL; |
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138 } |
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139 |
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140 switch (c->sockaddr->sa_family) { |
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141 |
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142 case AF_INET: |
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143 buf = ngx_cpymem(buf, "PROXY TCP4 ", sizeof("PROXY TCP4 ") - 1); |
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144 break; |
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145 |
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146 #if (NGX_HAVE_INET6) |
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147 case AF_INET6: |
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148 buf = ngx_cpymem(buf, "PROXY TCP6 ", sizeof("PROXY TCP6 ") - 1); |
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149 break; |
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150 #endif |
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151 |
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152 default: |
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153 return ngx_cpymem(buf, "PROXY UNKNOWN" CRLF, |
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154 sizeof("PROXY UNKNOWN" CRLF) - 1); |
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155 } |
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156 |
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157 buf += ngx_sock_ntop(c->sockaddr, c->socklen, buf, last - buf, 0); |
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158 |
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159 *buf++ = ' '; |
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160 |
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161 buf += ngx_sock_ntop(c->local_sockaddr, c->local_socklen, buf, last - buf, |
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162 0); |
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163 |
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164 port = ngx_inet_get_port(c->sockaddr); |
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165 lport = ngx_inet_get_port(c->local_sockaddr); |
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166 |
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167 return ngx_slprintf(buf, last, " %ui %ui" CRLF, port, lport); |
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168 } |