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