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