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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 #if (HAVE_SIN_LEN)
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34 addr_in->sin_len = sizeof(struct sockaddr_in);
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35 #endif
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36 addr_in->sin_family = AF_INET;
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37 addr_in->sin_addr.s_addr = addr;
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38 addr_in->sin_port = htons(port);
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39
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40 if (!(ls->addr_text.data = ngx_palloc(cf->pool, INET_ADDRSTRLEN + 6))) {
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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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45 ls->addr_text.len = ngx_snprintf((char *) ls->addr_text.data + len,
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46 6, ":%d", port);
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47
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48 ls->fd = (ngx_socket_t) -1;
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49 ls->family = AF_INET;
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50 ls->type = SOCK_STREAM;
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51 ls->protocol = IPPROTO_IP;
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52 #if (WIN32)
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53 ls->flags = WSA_FLAG_OVERLAPPED;
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54 #endif
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55 ls->sockaddr = (struct sockaddr *) addr_in;
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56 ls->socklen = sizeof(struct sockaddr_in);
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57 ls->addr = offsetof(struct sockaddr_in, sin_addr);
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58 ls->addr_text_max_len = INET_ADDRSTRLEN;
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59
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60 return ls;
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61 }
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62
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63
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64 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle)
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65 {
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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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98 ls[i].addr_text_max_len = INET_ADDRSTRLEN;
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99
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100 ls[i].addr_text.data = ngx_palloc(cycle->pool, ls[i].addr_text_max_len);
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101 if (ls[i].addr_text.data == NULL) {
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102 return NGX_ERROR;
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103 }
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104
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105 ls[i].family = addr_in->sin_family;
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106 ls[i].addr_text.len = ngx_sock_ntop(ls[i].family, ls[i].sockaddr,
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107 ls[i].addr_text.data,
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108 ls[i].addr_text_max_len);
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109 if (ls[i].addr_text.len == 0) {
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110 return NGX_ERROR;
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111 }
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112 }
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113
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114 return NGX_OK;
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115 }
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116
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117
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118 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle)
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119 {
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120 ngx_uint_t tries, failed, reuseaddr, i;
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121 ngx_err_t err;
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122 ngx_log_t *log;
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123 ngx_socket_t s;
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124 ngx_listening_t *ls;
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125
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126 reuseaddr = 1;
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127 #if (NGX_SUPPRESS_WARN)
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128 failed = 0;
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129 #endif
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130
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131 log = cycle->log;
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132
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133 /* TODO: tries configurable */
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134
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135 for (tries = /* STUB */ 5; tries; tries--) {
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136 failed = 0;
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137
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138 /* for each listening socket */
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139
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140 ls = cycle->listening.elts;
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141 for (i = 0; i < cycle->listening.nelts; i++) {
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142
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143 if (ls[i].ignore) {
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144 continue;
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145 }
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146
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147 if (ls[i].fd != -1) {
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148 continue;
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149 }
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150
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151 if (ls[i].inherited) {
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152
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153 /* TODO: close on exit */
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154 /* TODO: nonblocking */
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155 /* TODO: deferred accept */
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156
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157 continue;
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158 }
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159
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160 s = ngx_socket(ls[i].family, ls[i].type, ls[i].protocol,
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161 ls[i].flags);
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162
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163 if (s == -1) {
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164 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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165 ngx_socket_n " %s failed", ls[i].addr_text.data);
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166 return NGX_ERROR;
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167 }
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168
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169 #if (WIN32)
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170 /*
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171 * Winsock assignes a socket number divisible by 4
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172 * so to find a connection we divide a socket number by 4.
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173 */
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174
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175 if (s % 4) {
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176 ngx_log_error(NGX_LOG_EMERG, ls->log, 0,
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177 ngx_socket_n " created socket %d", s);
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178 return NGX_ERROR;
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179 }
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180 #endif
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181
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182 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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183 (const void *) &reuseaddr, sizeof(int)) == -1) {
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184 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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185 "setsockopt(SO_REUSEADDR) %s failed",
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186 ls[i].addr_text.data);
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187 return NGX_ERROR;
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188 }
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189
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190 /* TODO: close on exit */
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191
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192 if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) {
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193 if (ngx_nonblocking(s) == -1) {
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194 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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195 ngx_nonblocking_n " %s failed",
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196 ls[i].addr_text.data);
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197 return NGX_ERROR;
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198 }
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199 }
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200
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201 #if 0
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202 if (ls[i].nonblocking) {
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203 if (ngx_nonblocking(s) == -1) {
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204 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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205 ngx_nonblocking_n " %s failed",
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206 ls[i].addr_text.data);
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207 return NGX_ERROR;
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208 }
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209 }
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210 #endif
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211
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212 if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
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213 err = ngx_socket_errno;
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214 ngx_log_error(NGX_LOG_EMERG, log, err,
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215 "bind() to %s failed", ls[i].addr_text.data);
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216
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217 if (err != NGX_EADDRINUSE)
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218 return NGX_ERROR;
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219
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220 if (ngx_close_socket(s) == -1)
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221 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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222 ngx_close_socket_n " %s failed",
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223 ls[i].addr_text.data);
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224
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225 failed = 1;
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226 continue;
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227 }
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228
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229 if (listen(s, ls[i].backlog) == -1) {
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230 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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231 "listen() to %s failed", ls[i].addr_text.data);
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232 return NGX_ERROR;
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233 }
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234
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235 /* TODO: deferred accept */
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236
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237 ls[i].fd = s;
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238 }
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239
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240 if (!failed)
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241 break;
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242
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243 /* TODO: delay configurable */
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244
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245 ngx_log_error(NGX_LOG_NOTICE, log, 0,
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246 "try again to bind() after 500ms");
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247 ngx_msleep(500);
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248 }
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249
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250 if (failed) {
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251 ngx_log_error(NGX_LOG_EMERG, log, 0, "still can not bind()");
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252 return NGX_ERROR;
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253 }
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254
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255 return NGX_OK;
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256 }
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257
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258
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259 void ngx_close_listening_sockets(ngx_cycle_t *cycle)
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260 {
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261 ngx_uint_t i;
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262 ngx_socket_t fd;
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263 ngx_listening_t *ls;
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264
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265 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
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266 return;
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267 }
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268
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269 ngx_accept_mutex_held = 0;
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270 ngx_accept_mutex = NULL;
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271
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272 ls = cycle->listening.elts;
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273 for (i = 0; i < cycle->listening.nelts; i++) {
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274 fd = ls[i].fd;
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275
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276 #if (WIN32)
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277 /*
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278 * Winsock assignes a socket number divisible by 4
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279 * so to find a connection we divide a socket number by 4.
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280 */
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281
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282 fd /= 4;
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283 #endif
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284
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285 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
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286 if (cycle->connections[fd].read->active) {
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287 ngx_del_conn(&cycle->connections[fd], NGX_CLOSE_EVENT);
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288 }
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289
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290 } else {
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291 if (cycle->read_events[fd].active) {
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292 ngx_del_event(&cycle->read_events[fd],
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293 NGX_READ_EVENT, NGX_CLOSE_EVENT);
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294 }
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295 }
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296
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297 if (ngx_close_socket(ls[i].fd) == -1) {
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298 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
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299 ngx_close_socket_n " %s failed",
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300 ls[i].addr_text.data);
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301 }
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302
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303 cycle->connections[fd].fd = (ngx_socket_t) -1;
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304 }
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305 }
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306
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307
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308 void ngx_close_connection(ngx_connection_t *c)
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309 {
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310 ngx_socket_t fd;
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311
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312 if (c->pool == NULL) {
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313 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
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314 return;
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315 }
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316
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317 #if (NGX_OPENSSL)
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318
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319 if (c->ssl) {
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320 if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
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321 c->read->event_handler = ngx_ssl_close_handler;
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322 c->write->event_handler = ngx_ssl_close_handler;
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323 return;
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324 }
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325 }
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326
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327 #endif
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328
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329 if (c->read->timer_set) {
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330 ngx_del_timer(c->read);
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331 }
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332
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333 if (c->write->timer_set) {
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334 ngx_del_timer(c->write);
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335 }
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336
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337 if (ngx_del_conn) {
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338 ngx_del_conn(c, NGX_CLOSE_EVENT);
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339
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340 } else {
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341 if (c->read->active || c->read->disabled) {
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342 ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
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343 }
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344
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345 if (c->write->active || c->write->disabled) {
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346 ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
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347 }
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348 }
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349
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350 #if (NGX_THREADS)
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351
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352 /*
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353 * we have to clean the connection information before the closing
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354 * because another thread may reopen the same file descriptor
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355 * before we clean the connection
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356 */
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357
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358 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_OK) {
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359
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360 if (c->read->prev) {
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361 ngx_delete_posted_event(c->read);
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362 }
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363
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364 if (c->write->prev) {
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365 ngx_delete_posted_event(c->write);
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366 }
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367
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368 c->read->closed = 1;
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369 c->write->closed = 1;
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370
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371 if (c->single_connection) {
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372 ngx_unlock(&c->lock);
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373 c->read->locked = 0;
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374 c->write->locked = 0;
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375 }
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376
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377 ngx_mutex_unlock(ngx_posted_events_mutex);
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378 }
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379
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380 #else
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381
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382 if (c->read->prev) {
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383 ngx_delete_posted_event(c->read);
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384 }
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385
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386 if (c->write->prev) {
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387 ngx_delete_posted_event(c->write);
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388 }
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389
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390 c->read->closed = 1;
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391 c->write->closed = 1;
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392
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393 #endif
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394
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395 fd = c->fd;
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396 c->fd = (ngx_socket_t) -1;
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397 c->data = NULL;
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398
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399 ngx_destroy_pool(c->pool);
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400
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401 if (ngx_close_socket(fd) == -1) {
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402
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403 /* we use ngx_cycle->log because c->log was in c->pool */
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404
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405 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_socket_errno,
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406 ngx_close_socket_n " failed");
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407 }
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408 }
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409
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410
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411
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412 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text)
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413 {
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414 ngx_uint_t level;
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415
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416 if (err == NGX_ECONNRESET
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417 && c->log_error == NGX_ERROR_IGNORE_ECONNRESET)
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418 {
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419 return 0;
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420 }
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421
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422 if (err == NGX_ECONNRESET
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423 #if !(WIN32)
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424 || err == NGX_EPIPE
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425 #endif
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426 || err == NGX_ENOTCONN
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427 || err == NGX_ECONNREFUSED
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428 || err == NGX_EHOSTUNREACH)
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429 {
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430
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|
|
431 switch (c->log_error) {
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432
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433 case NGX_ERROR_IGNORE_ECONNRESET:
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434 case NGX_ERROR_INFO:
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435 level = NGX_LOG_INFO;
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436 break;
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437
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438 case NGX_ERROR_ERR:
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439 level = NGX_LOG_ERR;
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440 break;
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441
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442 default:
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|
443 level = NGX_LOG_CRIT;
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444 }
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445
|
|
|
446 } else {
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|
|
447 level = NGX_LOG_CRIT;
|
|
|
448 }
|
|
|
449
|
|
|
450 ngx_log_error(level, c->log, err, text);
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|
|
451
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|
|
452 return NGX_ERROR;
|
|
|
453 }
|
