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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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90
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70 ngx_err_t err;
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72
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71 socklen_t aflen;
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72 struct accept_filter_arg af;
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73 #endif
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74 #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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75 socklen_t tlen;
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76 int timeout;
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77 #endif
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0
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78
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79 ls = cycle->listening.elts;
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80 for (i = 0; i < cycle->listening.nelts; i++) {
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81
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82 /* AF_INET only */
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83
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84 ls[i].sockaddr = ngx_palloc(cycle->pool, sizeof(struct sockaddr_in));
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85 if (ls[i].sockaddr == NULL) {
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86 return NGX_ERROR;
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87 }
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88
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89 ls[i].socklen = sizeof(struct sockaddr_in);
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90 if (getsockname(ls[i].fd, ls[i].sockaddr, &ls[i].socklen) == -1) {
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91 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
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92 "getsockname() of the inherited "
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93 "socket #%d failed", ls[i].fd);
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94 ls[i].ignore = 1;
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95 continue;
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96 }
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97
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28
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98 sin = (struct sockaddr_in *) ls[i].sockaddr;
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0
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99
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28
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100 if (sin->sin_family != AF_INET) {
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0
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101 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
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102 "the inherited socket #%d has "
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103 "unsupported family", ls[i].fd);
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104 ls[i].ignore = 1;
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105 continue;
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106 }
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10
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107
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0
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108 ls[i].addr_text_max_len = INET_ADDRSTRLEN;
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109
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10
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110 ls[i].addr_text.data = ngx_palloc(cycle->pool, INET_ADDRSTRLEN - 1
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111 + sizeof(":65535") - 1);
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0
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112 if (ls[i].addr_text.data == NULL) {
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113 return NGX_ERROR;
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114 }
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115
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28
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116 ls[i].family = sin->sin_family;
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10
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117 len = ngx_sock_ntop(ls[i].family, ls[i].sockaddr,
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118 ls[i].addr_text.data, INET_ADDRSTRLEN);
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119 if (len == 0) {
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0
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120 return NGX_ERROR;
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121 }
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10
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122
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123 ls[i].addr_text.len = ngx_sprintf(ls[i].addr_text.data + len, ":%d",
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28
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124 ntohs(sin->sin_port))
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10
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125 - ls[i].addr_text.data;
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72
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126
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86
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127 ls[i].backlog = -1;
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128
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72
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129 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
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130
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131 ngx_memzero(&af, sizeof(struct accept_filter_arg));
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132 aflen = sizeof(struct accept_filter_arg);
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133
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134 if (getsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, &af, &aflen)
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135 == -1)
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136 {
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90
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137 err = ngx_errno;
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138
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139 if (err == NGX_EINVAL) {
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140 continue;
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141 }
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142
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143 ngx_log_error(NGX_LOG_NOTICE, cycle->log, err,
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72
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144 "getsockopt(SO_ACCEPTFILTER) for %V failed, ignored",
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145 &ls[i].addr_text);
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146 continue;
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147 }
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148
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149 if (aflen < sizeof(struct accept_filter_arg) || af.af_name[0] == '\0') {
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150 continue;
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151 }
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152
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153 ls[i].accept_filter = ngx_palloc(cycle->pool, 16);
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154 if (ls[i].accept_filter == NULL) {
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155 return NGX_ERROR;
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156 }
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157
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158 (void) ngx_cpystrn((u_char *) ls[i].accept_filter,
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159 (u_char *) af.af_name, 16);
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160 #endif
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161
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162 #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
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163
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164 timeout = 0;
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165 tlen = sizeof(int);
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166
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167 if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, &tlen)
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168 == -1)
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169 {
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170 ngx_log_error(NGX_LOG_NOTICE, cycle->log, ngx_errno,
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171 "getsockopt(TCP_DEFER_ACCEPT) for %V failed, ignored",
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172 &ls[i].addr_text);
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173 continue;
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174 }
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175
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176 if (tlen < sizeof(int) || timeout == 0) {
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177 continue;
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178 }
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179
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180 ls[i].deferred_accept = 1;
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181 #endif
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0
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182 }
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183
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184 return NGX_OK;
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185 }
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186
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187
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70
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188 ngx_int_t
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189 ngx_open_listening_sockets(ngx_cycle_t *cycle)
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0
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190 {
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191 ngx_uint_t tries, failed, reuseaddr, i;
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192 ngx_err_t err;
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193 ngx_log_t *log;
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194 ngx_socket_t s;
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195 ngx_listening_t *ls;
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196
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197 reuseaddr = 1;
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198 #if (NGX_SUPPRESS_WARN)
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199 failed = 0;
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200 #endif
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201
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202 log = cycle->log;
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203
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204 /* TODO: tries configurable */
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205
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206 for (tries = /* STUB */ 5; tries; tries--) {
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207 failed = 0;
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208
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209 /* for each listening socket */
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210
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211 ls = cycle->listening.elts;
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212 for (i = 0; i < cycle->listening.nelts; i++) {
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213
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214 if (ls[i].ignore) {
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215 continue;
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216 }
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217
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218 if (ls[i].fd != -1) {
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219 continue;
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220 }
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221
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222 if (ls[i].inherited) {
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223
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224 /* TODO: close on exit */
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225 /* TODO: nonblocking */
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226 /* TODO: deferred accept */
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227
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228 continue;
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229 }
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230
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28
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231 s = ngx_socket(ls[i].family, ls[i].type, 0);
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0
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232
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233 if (s == -1) {
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234 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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235 ngx_socket_n " %V failed", &ls[i].addr_text);
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0
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236 return NGX_ERROR;
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237 }
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238
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10
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239 #if (NGX_WIN32)
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92
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240
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0
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241 /*
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242 * Winsock assignes a socket number divisible by 4
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243 * so to find a connection we divide a socket number by 4.
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244 */
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245
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246 if (s % 4) {
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92
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247 ngx_log_error(NGX_LOG_EMERG, log, 0,
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0
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248 ngx_socket_n " created socket %d", s);
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249 return NGX_ERROR;
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250 }
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251 #endif
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252
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253 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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254 (const void *) &reuseaddr, sizeof(int)) == -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 "setsockopt(SO_REUSEADDR) %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 /* TODO: close on exit */
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262
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263 if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) {
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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
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272 #if 0
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273 if (ls[i].nonblocking) {
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274 if (ngx_nonblocking(s) == -1) {
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275 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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276 ngx_nonblocking_n " %V failed",
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277 &ls[i].addr_text);
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0
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278 return NGX_ERROR;
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279 }
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280 }
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281 #endif
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282
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283 if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
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284 err = ngx_socket_errno;
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285 ngx_log_error(NGX_LOG_EMERG, log, err,
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10
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286 "bind() to %V failed", &ls[i].addr_text);
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0
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287
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288 if (err != NGX_EADDRINUSE)
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289 return NGX_ERROR;
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290
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291 if (ngx_close_socket(s) == -1)
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292 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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293 ngx_close_socket_n " %V failed",
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294 &ls[i].addr_text);
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0
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295
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296 failed = 1;
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297 continue;
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298 }
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299
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300 if (listen(s, ls[i].backlog) == -1) {
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301 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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10
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302 "listen() to %V failed", &ls[i].addr_text);
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0
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303 return NGX_ERROR;
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304 }
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305
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306 /* TODO: deferred accept */
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307
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308 ls[i].fd = s;
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309 }
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310
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311 if (!failed)
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312 break;
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313
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314 /* TODO: delay configurable */
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315
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316 ngx_log_error(NGX_LOG_NOTICE, log, 0,
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317 "try again to bind() after 500ms");
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318 ngx_msleep(500);
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319 }
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320
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321 if (failed) {
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26
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322 ngx_log_error(NGX_LOG_EMERG, log, 0, "still could not bind()");
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0
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323 return NGX_ERROR;
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324 }
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325
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326 return NGX_OK;
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327 }
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328
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329
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70
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330 void
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331 ngx_close_listening_sockets(ngx_cycle_t *cycle)
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0
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332 {
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92
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333 ngx_uint_t i;
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334 ngx_listening_t *ls;
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335 ngx_connection_t *c;
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0
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336
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337 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
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338 return;
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339 }
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340
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341 ngx_accept_mutex_held = 0;
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342 ngx_accept_mutex = NULL;
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343
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344 ls = cycle->listening.elts;
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345 for (i = 0; i < cycle->listening.nelts; i++) {
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346
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92
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347 c = ls[i].connection;
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0
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348
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349 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
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92
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350 if (c->read->active) {
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351 ngx_del_conn(c, NGX_CLOSE_EVENT);
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0
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352 }
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353
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354 } else {
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92
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355 if (c->read->active) {
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356 ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
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0
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357 }
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358 }
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359
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92
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360 ngx_free_connection(c);
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361
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362 c->fd = (ngx_socket_t) -1;
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363
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364 if (ngx_close_socket(ls[i].fd) == -1) {
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0
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365 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
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10
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366 ngx_close_socket_n " %V failed", &ls[i].addr_text);
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0
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367 }
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92
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368 }
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369 }
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0
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370
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92
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371
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372 ngx_connection_t *
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373 ngx_get_connection(ngx_socket_t s, ngx_log_t *log)
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374 {
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375 ngx_connection_t *c;
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376
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377 /* disable warning: Win32 SOCKET is u_int while UNIX socket is int */
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378
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379 if (ngx_cycle->files && (ngx_uint_t) s >= ngx_cycle->files_n) {
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380 ngx_log_error(NGX_LOG_ALERT, log, 0,
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381 "the new socket has number %d, "
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382 "but only %ui files are available",
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383 s, ngx_cycle->files_n);
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384 return NULL;
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385 }
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386
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|
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387 /* ngx_mutex_lock */
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388
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389 c = ngx_cycle->free_connections;
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390
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|
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391 if (c == NULL) {
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392 ngx_log_error(NGX_LOG_ALERT, log, 0,
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393 "%ui worker_connections is not enough",
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394 ngx_cycle->connection_n);
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395
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|
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396 /* ngx_mutex_unlock */
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397
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398 return NULL;
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399 }
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400
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|
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401 ngx_cycle->free_connections = c->data;
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402 ngx_cycle->free_connection_n--;
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403
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404 /* ngx_mutex_unlock */
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405
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|
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406 if (ngx_cycle->files) {
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407 ngx_cycle->files[s] = c;
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408 }
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409
|
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410 return c;
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411 }
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412
|
|
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413
|
|
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414 void
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415 ngx_free_connection(ngx_connection_t *c)
|
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416 {
|
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417 /* ngx_mutex_lock */
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418
|
|
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419 c->data = ngx_cycle->free_connections;
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|
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420 ngx_cycle->free_connections = c;
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421 ngx_cycle->free_connection_n++;
|
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422
|
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423 /* ngx_mutex_unlock */
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424
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|
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425 if (ngx_cycle->files) {
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|
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426 ngx_cycle->files[c->fd] = NULL;
|
|
0
|
427 }
|
|
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428 }
|
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429
|
|
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430
|
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70
|
431 void
|
|
|
432 ngx_close_connection(ngx_connection_t *c)
|
|
0
|
433 {
|
|
|
434 ngx_socket_t fd;
|
|
|
435
|
|
28
|
436 if (c->fd == -1) {
|
|
0
|
437 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
|
|
|
438 return;
|
|
|
439 }
|
|
|
440
|
|
|
441 if (c->read->timer_set) {
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|
|
442 ngx_del_timer(c->read);
|
|
|
443 }
|
|
|
444
|
|
|
445 if (c->write->timer_set) {
|
|
|
446 ngx_del_timer(c->write);
|
|
|
447 }
|
|
|
448
|
|
|
449 if (ngx_del_conn) {
|
|
|
450 ngx_del_conn(c, NGX_CLOSE_EVENT);
|
|
|
451
|
|
|
452 } else {
|
|
|
453 if (c->read->active || c->read->disabled) {
|
|
|
454 ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
|
|
|
455 }
|
|
|
456
|
|
|
457 if (c->write->active || c->write->disabled) {
|
|
|
458 ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
|
|
|
459 }
|
|
|
460 }
|
|
|
461
|
|
|
462 #if (NGX_THREADS)
|
|
|
463
|
|
|
464 /*
|
|
|
465 * we have to clean the connection information before the closing
|
|
|
466 * because another thread may reopen the same file descriptor
|
|
|
467 * before we clean the connection
|
|
|
468 */
|
|
|
469
|
|
|
470 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_OK) {
|
|
|
471
|
|
|
472 if (c->read->prev) {
|
|
|
473 ngx_delete_posted_event(c->read);
|
|
|
474 }
|
|
|
475
|
|
|
476 if (c->write->prev) {
|
|
|
477 ngx_delete_posted_event(c->write);
|
|
|
478 }
|
|
|
479
|
|
|
480 c->read->closed = 1;
|
|
|
481 c->write->closed = 1;
|
|
|
482
|
|
|
483 if (c->single_connection) {
|
|
|
484 ngx_unlock(&c->lock);
|
|
|
485 c->read->locked = 0;
|
|
|
486 c->write->locked = 0;
|
|
|
487 }
|
|
|
488
|
|
|
489 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
490 }
|
|
|
491
|
|
|
492 #else
|
|
|
493
|
|
|
494 if (c->read->prev) {
|
|
|
495 ngx_delete_posted_event(c->read);
|
|
|
496 }
|
|
|
497
|
|
|
498 if (c->write->prev) {
|
|
|
499 ngx_delete_posted_event(c->write);
|
|
|
500 }
|
|
|
501
|
|
|
502 c->read->closed = 1;
|
|
|
503 c->write->closed = 1;
|
|
|
504
|
|
|
505 #endif
|
|
|
506
|
|
92
|
507 ngx_free_connection(c);
|
|
|
508
|
|
0
|
509 fd = c->fd;
|
|
|
510 c->fd = (ngx_socket_t) -1;
|
|
|
511
|
|
|
512 if (ngx_close_socket(fd) == -1) {
|
|
|
513
|
|
|
514 /* we use ngx_cycle->log because c->log was in c->pool */
|
|
|
515
|
|
|
516 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_socket_errno,
|
|
|
517 ngx_close_socket_n " failed");
|
|
|
518 }
|
|
|
519 }
|
|
|
520
|
|
|
521
|
|
70
|
522 ngx_int_t
|
|
|
523 ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text)
|
|
0
|
524 {
|
|
|
525 ngx_uint_t level;
|
|
|
526
|
|
|
527 if (err == NGX_ECONNRESET
|
|
|
528 && c->log_error == NGX_ERROR_IGNORE_ECONNRESET)
|
|
|
529 {
|
|
|
530 return 0;
|
|
|
531 }
|
|
|
532
|
|
86
|
533 if (err == 0
|
|
|
534 || err == NGX_ECONNRESET
|
|
10
|
535 #if !(NGX_WIN32)
|
|
0
|
536 || err == NGX_EPIPE
|
|
|
537 #endif
|
|
|
538 || err == NGX_ENOTCONN
|
|
|
539 || err == NGX_ECONNREFUSED
|
|
|
540 || err == NGX_EHOSTUNREACH)
|
|
|
541 {
|
|
|
542
|
|
|
543 switch (c->log_error) {
|
|
|
544
|
|
|
545 case NGX_ERROR_IGNORE_ECONNRESET:
|
|
|
546 case NGX_ERROR_INFO:
|
|
|
547 level = NGX_LOG_INFO;
|
|
|
548 break;
|
|
|
549
|
|
|
550 case NGX_ERROR_ERR:
|
|
|
551 level = NGX_LOG_ERR;
|
|
|
552 break;
|
|
|
553
|
|
|
554 default:
|
|
|
555 level = NGX_LOG_CRIT;
|
|
|
556 }
|
|
|
557
|
|
|
558 } else {
|
|
|
559 level = NGX_LOG_CRIT;
|
|
|
560 }
|
|
|
561
|
|
|
562 ngx_log_error(level, c->log, err, text);
|
|
|
563
|
|
|
564 return NGX_ERROR;
|
|
|
565 }
|
