0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10
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11
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12 ngx_os_io_t ngx_io;
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13
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14
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70
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15 ngx_listening_t *
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16 ngx_listening_inet_stream_socket(ngx_conf_t *cf, in_addr_t addr, in_port_t port)
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0
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17 {
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18 size_t len;
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19 ngx_listening_t *ls;
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28
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20 struct sockaddr_in *sin;
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0
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21
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50
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22 ls = ngx_array_push(&cf->cycle->listening);
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23 if (ls == NULL) {
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0
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24 return NULL;
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25 }
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26
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27 ngx_memzero(ls, sizeof(ngx_listening_t));
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28
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50
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29 sin = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in));
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30 if (sin == NULL) {
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0
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31 return NULL;
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32 }
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33
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28
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34 sin->sin_family = AF_INET;
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35 sin->sin_addr.s_addr = addr;
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36 sin->sin_port = htons(port);
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0
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37
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10
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38
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39 ls->addr_text.data = ngx_palloc(cf->pool,
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40 INET_ADDRSTRLEN - 1 + sizeof(":65535") - 1);
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41 if (ls->addr_text.data == NULL) {
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0
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42 return NULL;
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43 }
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44
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45 len = ngx_inet_ntop(AF_INET, &addr, ls->addr_text.data, INET_ADDRSTRLEN);
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10
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46
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47 ls->addr_text.len = ngx_sprintf(ls->addr_text.data + len, ":%d", port)
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48 - ls->addr_text.data;
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49
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0
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50 ls->fd = (ngx_socket_t) -1;
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51 ls->family = AF_INET;
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52 ls->type = SOCK_STREAM;
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28
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53 ls->sockaddr = (struct sockaddr *) sin;
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0
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54 ls->socklen = sizeof(struct sockaddr_in);
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55 ls->addr = offsetof(struct sockaddr_in, sin_addr);
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56 ls->addr_text_max_len = INET_ADDRSTRLEN;
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57
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58 return ls;
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59 }
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60
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61
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70
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62 ngx_int_t
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63 ngx_set_inherited_sockets(ngx_cycle_t *cycle)
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0
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64 {
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72
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65 size_t len;
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66 ngx_uint_t i;
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67 ngx_listening_t *ls;
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68 struct sockaddr_in *sin;
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69 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
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70 socklen_t aflen;
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71 struct accept_filter_arg af;
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72 #endif
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73 #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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74 socklen_t tlen;
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75 int timeout;
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76 #endif
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0
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77
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78 ls = cycle->listening.elts;
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79 for (i = 0; i < cycle->listening.nelts; i++) {
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80
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81 /* AF_INET only */
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82
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83 ls[i].sockaddr = ngx_palloc(cycle->pool, sizeof(struct sockaddr_in));
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84 if (ls[i].sockaddr == NULL) {
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85 return NGX_ERROR;
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86 }
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87
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88 ls[i].socklen = sizeof(struct sockaddr_in);
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89 if (getsockname(ls[i].fd, ls[i].sockaddr, &ls[i].socklen) == -1) {
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90 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
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91 "getsockname() of the inherited "
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92 "socket #%d failed", ls[i].fd);
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93 ls[i].ignore = 1;
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94 continue;
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95 }
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96
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28
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97 sin = (struct sockaddr_in *) ls[i].sockaddr;
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0
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98
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28
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99 if (sin->sin_family != AF_INET) {
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0
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100 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
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101 "the inherited socket #%d has "
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102 "unsupported family", ls[i].fd);
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103 ls[i].ignore = 1;
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104 continue;
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105 }
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10
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106
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0
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107 ls[i].addr_text_max_len = INET_ADDRSTRLEN;
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108
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10
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109 ls[i].addr_text.data = ngx_palloc(cycle->pool, INET_ADDRSTRLEN - 1
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110 + sizeof(":65535") - 1);
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0
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111 if (ls[i].addr_text.data == NULL) {
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112 return NGX_ERROR;
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113 }
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114
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28
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115 ls[i].family = sin->sin_family;
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10
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116 len = ngx_sock_ntop(ls[i].family, ls[i].sockaddr,
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117 ls[i].addr_text.data, INET_ADDRSTRLEN);
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118 if (len == 0) {
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0
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119 return NGX_ERROR;
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120 }
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10
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121
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122 ls[i].addr_text.len = ngx_sprintf(ls[i].addr_text.data + len, ":%d",
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28
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123 ntohs(sin->sin_port))
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10
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124 - ls[i].addr_text.data;
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72
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125
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86
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126 ls[i].backlog = -1;
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127
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72
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128 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
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129
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130 ngx_memzero(&af, sizeof(struct accept_filter_arg));
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131 aflen = sizeof(struct accept_filter_arg);
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132
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133 if (getsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, &af, &aflen)
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134 == -1)
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135 {
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136 ngx_log_error(NGX_LOG_NOTICE, cycle->log, ngx_errno,
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137 "getsockopt(SO_ACCEPTFILTER) for %V failed, ignored",
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138 &ls[i].addr_text);
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139 continue;
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140 }
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141
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142 if (aflen < sizeof(struct accept_filter_arg) || af.af_name[0] == '\0') {
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143 continue;
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144 }
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145
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146 ls[i].accept_filter = ngx_palloc(cycle->pool, 16);
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147 if (ls[i].accept_filter == NULL) {
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148 return NGX_ERROR;
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149 }
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150
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151 (void) ngx_cpystrn((u_char *) ls[i].accept_filter,
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152 (u_char *) af.af_name, 16);
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153 #endif
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154
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155 #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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156
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157 timeout = 0;
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158 tlen = sizeof(int);
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159
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160 if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, &tlen)
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161 == -1)
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162 {
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163 ngx_log_error(NGX_LOG_NOTICE, cycle->log, ngx_errno,
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164 "getsockopt(TCP_DEFER_ACCEPT) for %V failed, ignored",
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165 &ls[i].addr_text);
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166 continue;
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167 }
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168
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169 if (tlen < sizeof(int) || timeout == 0) {
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170 continue;
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171 }
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172
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173 ls[i].deferred_accept = 1;
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174 #endif
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0
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175 }
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176
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177 return NGX_OK;
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178 }
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179
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180
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70
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181 ngx_int_t
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182 ngx_open_listening_sockets(ngx_cycle_t *cycle)
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0
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183 {
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184 ngx_uint_t tries, failed, reuseaddr, i;
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185 ngx_err_t err;
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186 ngx_log_t *log;
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187 ngx_socket_t s;
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188 ngx_listening_t *ls;
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189
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190 reuseaddr = 1;
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191 #if (NGX_SUPPRESS_WARN)
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192 failed = 0;
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193 #endif
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194
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195 log = cycle->log;
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196
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197 /* TODO: tries configurable */
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198
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199 for (tries = /* STUB */ 5; tries; tries--) {
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200 failed = 0;
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201
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202 /* for each listening socket */
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203
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204 ls = cycle->listening.elts;
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205 for (i = 0; i < cycle->listening.nelts; i++) {
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206
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207 if (ls[i].ignore) {
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208 continue;
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209 }
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210
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211 if (ls[i].fd != -1) {
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212 continue;
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213 }
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214
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215 if (ls[i].inherited) {
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216
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217 /* TODO: close on exit */
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218 /* TODO: nonblocking */
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219 /* TODO: deferred accept */
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220
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221 continue;
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222 }
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223
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28
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224 s = ngx_socket(ls[i].family, ls[i].type, 0);
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0
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225
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226 if (s == -1) {
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227 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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228 ngx_socket_n " %V failed", &ls[i].addr_text);
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0
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229 return NGX_ERROR;
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230 }
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231
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10
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232 #if (NGX_WIN32)
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0
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233 /*
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234 * Winsock assignes a socket number divisible by 4
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235 * so to find a connection we divide a socket number by 4.
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236 */
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237
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238 if (s % 4) {
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239 ngx_log_error(NGX_LOG_EMERG, ls->log, 0,
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240 ngx_socket_n " created socket %d", s);
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241 return NGX_ERROR;
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242 }
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243 #endif
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244
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245 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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246 (const void *) &reuseaddr, sizeof(int)) == -1) {
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247 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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248 "setsockopt(SO_REUSEADDR) %V failed",
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249 &ls[i].addr_text);
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0
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250 return NGX_ERROR;
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251 }
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252
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253 /* TODO: close on exit */
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254
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255 if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) {
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256 if (ngx_nonblocking(s) == -1) {
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257 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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258 ngx_nonblocking_n " %V failed",
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259 &ls[i].addr_text);
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0
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260 return NGX_ERROR;
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261 }
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262 }
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263
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264 #if 0
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265 if (ls[i].nonblocking) {
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266 if (ngx_nonblocking(s) == -1) {
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267 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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268 ngx_nonblocking_n " %V failed",
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269 &ls[i].addr_text);
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0
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270 return NGX_ERROR;
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271 }
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272 }
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273 #endif
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274
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275 if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
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276 err = ngx_socket_errno;
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277 ngx_log_error(NGX_LOG_EMERG, log, err,
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10
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278 "bind() to %V failed", &ls[i].addr_text);
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0
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279
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280 if (err != NGX_EADDRINUSE)
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281 return NGX_ERROR;
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282
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283 if (ngx_close_socket(s) == -1)
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284 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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285 ngx_close_socket_n " %V failed",
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286 &ls[i].addr_text);
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0
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287
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288 failed = 1;
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289 continue;
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290 }
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291
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292 if (listen(s, ls[i].backlog) == -1) {
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293 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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294 "listen() to %V failed", &ls[i].addr_text);
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0
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295 return NGX_ERROR;
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296 }
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297
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298 /* TODO: deferred accept */
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299
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300 ls[i].fd = s;
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301 }
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302
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303 if (!failed)
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304 break;
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305
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306 /* TODO: delay configurable */
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307
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308 ngx_log_error(NGX_LOG_NOTICE, log, 0,
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309 "try again to bind() after 500ms");
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310 ngx_msleep(500);
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311 }
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312
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313 if (failed) {
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26
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314 ngx_log_error(NGX_LOG_EMERG, log, 0, "still could not bind()");
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0
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315 return NGX_ERROR;
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316 }
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317
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318 return NGX_OK;
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319 }
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320
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321
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70
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322 void
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323 ngx_close_listening_sockets(ngx_cycle_t *cycle)
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0
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324 {
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325 ngx_uint_t i;
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326 ngx_socket_t fd;
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327 ngx_listening_t *ls;
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328
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329 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
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330 return;
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331 }
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332
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333 ngx_accept_mutex_held = 0;
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334 ngx_accept_mutex = NULL;
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335
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336 ls = cycle->listening.elts;
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337 for (i = 0; i < cycle->listening.nelts; i++) {
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338 fd = ls[i].fd;
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339
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10
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340 #if (NGX_WIN32)
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0
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341 /*
|
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342 * Winsock assignes a socket number divisible by 4
|
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343 * so to find a connection we divide a socket number by 4.
|
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344 */
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345
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346 fd /= 4;
|
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347 #endif
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348
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349 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
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350 if (cycle->connections[fd].read->active) {
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351 ngx_del_conn(&cycle->connections[fd], NGX_CLOSE_EVENT);
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352 }
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353
|
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354 } else {
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355 if (cycle->read_events[fd].active) {
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356 ngx_del_event(&cycle->read_events[fd],
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357 NGX_READ_EVENT, NGX_CLOSE_EVENT);
|
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358 }
|
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359 }
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360
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16
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361 if (ngx_close_socket(fd) == -1) {
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0
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362 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
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10
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363 ngx_close_socket_n " %V failed", &ls[i].addr_text);
|
0
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364 }
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365
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366 cycle->connections[fd].fd = (ngx_socket_t) -1;
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367 }
|
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368 }
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369
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370
|
70
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371 void
|
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372 ngx_close_connection(ngx_connection_t *c)
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0
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373 {
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374 ngx_socket_t fd;
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375
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28
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376 if (c->fd == -1) {
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0
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377 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
|
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378 return;
|
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379 }
|
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380
|
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381 if (c->read->timer_set) {
|
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382 ngx_del_timer(c->read);
|
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383 }
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384
|
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385 if (c->write->timer_set) {
|
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386 ngx_del_timer(c->write);
|
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387 }
|
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388
|
|
389 if (ngx_del_conn) {
|
|
390 ngx_del_conn(c, NGX_CLOSE_EVENT);
|
|
391
|
|
392 } else {
|
|
393 if (c->read->active || c->read->disabled) {
|
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394 ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
|
|
395 }
|
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396
|
|
397 if (c->write->active || c->write->disabled) {
|
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398 ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
|
|
399 }
|
|
400 }
|
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401
|
|
402 #if (NGX_THREADS)
|
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403
|
|
404 /*
|
|
405 * we have to clean the connection information before the closing
|
|
406 * because another thread may reopen the same file descriptor
|
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407 * before we clean the connection
|
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408 */
|
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409
|
|
410 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_OK) {
|
|
411
|
|
412 if (c->read->prev) {
|
|
413 ngx_delete_posted_event(c->read);
|
|
414 }
|
|
415
|
|
416 if (c->write->prev) {
|
|
417 ngx_delete_posted_event(c->write);
|
|
418 }
|
|
419
|
|
420 c->read->closed = 1;
|
|
421 c->write->closed = 1;
|
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422
|
|
423 if (c->single_connection) {
|
|
424 ngx_unlock(&c->lock);
|
|
425 c->read->locked = 0;
|
|
426 c->write->locked = 0;
|
|
427 }
|
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428
|
|
429 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
430 }
|
|
431
|
|
432 #else
|
|
433
|
|
434 if (c->read->prev) {
|
|
435 ngx_delete_posted_event(c->read);
|
|
436 }
|
|
437
|
|
438 if (c->write->prev) {
|
|
439 ngx_delete_posted_event(c->write);
|
|
440 }
|
|
441
|
|
442 c->read->closed = 1;
|
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443 c->write->closed = 1;
|
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444
|
|
445 #endif
|
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446
|
|
447 fd = c->fd;
|
|
448 c->fd = (ngx_socket_t) -1;
|
|
449 c->data = NULL;
|
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450
|
|
451 if (ngx_close_socket(fd) == -1) {
|
|
452
|
|
453 /* we use ngx_cycle->log because c->log was in c->pool */
|
|
454
|
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455 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_socket_errno,
|
|
456 ngx_close_socket_n " failed");
|
|
457 }
|
|
458 }
|
|
459
|
|
460
|
70
|
461 ngx_int_t
|
|
462 ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text)
|
0
|
463 {
|
|
464 ngx_uint_t level;
|
|
465
|
|
466 if (err == NGX_ECONNRESET
|
|
467 && c->log_error == NGX_ERROR_IGNORE_ECONNRESET)
|
|
468 {
|
|
469 return 0;
|
|
470 }
|
|
471
|
86
|
472 if (err == 0
|
|
473 || err == NGX_ECONNRESET
|
10
|
474 #if !(NGX_WIN32)
|
0
|
475 || err == NGX_EPIPE
|
|
476 #endif
|
|
477 || err == NGX_ENOTCONN
|
|
478 || err == NGX_ECONNREFUSED
|
|
479 || err == NGX_EHOSTUNREACH)
|
|
480 {
|
|
481
|
|
482 switch (c->log_error) {
|
|
483
|
|
484 case NGX_ERROR_IGNORE_ECONNRESET:
|
|
485 case NGX_ERROR_INFO:
|
|
486 level = NGX_LOG_INFO;
|
|
487 break;
|
|
488
|
|
489 case NGX_ERROR_ERR:
|
|
490 level = NGX_LOG_ERR;
|
|
491 break;
|
|
492
|
|
493 default:
|
|
494 level = NGX_LOG_CRIT;
|
|
495 }
|
|
496
|
|
497 } else {
|
|
498 level = NGX_LOG_CRIT;
|
|
499 }
|
|
500
|
|
501 ngx_log_error(level, c->log, err, text);
|
|
502
|
|
503 return NGX_ERROR;
|
|
504 }
|