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