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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 #include <ngx_event_connect.h>
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11
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12
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36
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13 ngx_int_t
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14 ngx_event_connect_peer(ngx_peer_connection_t *pc)
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0
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15 {
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92
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16 int rc;
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336
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17 ngx_int_t event;
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92
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18 ngx_err_t err;
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260
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19 ngx_uint_t level;
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92
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20 ngx_socket_t s;
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21 ngx_event_t *rev, *wev;
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22 ngx_connection_t *c;
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0
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23
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260
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24 rc = pc->get(pc, pc->data);
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25 if (rc != NGX_OK) {
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26 return rc;
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0
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27 }
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28
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260
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29 s = ngx_socket(pc->sockaddr->sa_family, SOCK_STREAM, 0);
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0
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30
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260
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31 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0, "socket %d", s);
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58
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32
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0
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33 if (s == -1) {
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34 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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35 ngx_socket_n " failed");
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36 return NGX_ERROR;
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37 }
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38
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39
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92
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40 c = ngx_get_connection(s, pc->log);
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0
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41
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92
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42 if (c == NULL) {
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0
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43 if (ngx_close_socket(s) == -1) {
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44 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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45 ngx_close_socket_n "failed");
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46 }
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47
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48 return NGX_ERROR;
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49 }
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50
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51 if (pc->rcvbuf) {
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52 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
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112
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53 (const void *) &pc->rcvbuf, sizeof(int)) == -1)
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54 {
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0
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55 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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56 "setsockopt(SO_RCVBUF) failed");
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57
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92
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58 ngx_free_connection(c);
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59
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0
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60 if (ngx_close_socket(s) == -1) {
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61 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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62 ngx_close_socket_n " failed");
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63 }
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64
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65 return NGX_ERROR;
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66 }
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67 }
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68
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69 if (ngx_nonblocking(s) == -1) {
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70 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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71 ngx_nonblocking_n " failed");
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72
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92
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73 ngx_free_connection(c);
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74
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0
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75 if (ngx_close_socket(s) == -1) {
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76 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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77 ngx_close_socket_n " failed");
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78 }
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79
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80 return NGX_ERROR;
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81 }
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82
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92
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83 c->recv = ngx_recv;
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84 c->send = ngx_send;
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126
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85 c->recv_chain = ngx_recv_chain;
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92
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86 c->send_chain = ngx_send_chain;
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32
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87
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326
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88 c->sendfile = 1;
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89
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92
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90 c->log_error = pc->log_error;
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0
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91
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260
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92 if (pc->sockaddr->sa_family != AF_INET) {
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92
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93 c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
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94 c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
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132
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95
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96 #if (NGX_SOLARIS)
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97 /* Solaris's sendfilev() supports AF_NCA, AF_INET, and AF_INET6 */
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98 c->sendfile = 0;
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99 #endif
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0
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100 }
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101
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110
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102 rev = c->read;
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103 wev = c->write;
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0
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104
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105 rev->log = pc->log;
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106 wev->log = pc->log;
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107
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108 pc->connection = c;
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109
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110 /*
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110
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111 * TODO: MT: - ngx_atomic_fetch_add()
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0
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112 * or protection by critical section or mutex
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113 *
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114 * TODO: MP: - allocated in a shared memory
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110
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115 * - ngx_atomic_fetch_add()
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0
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116 * or protection by critical section or mutex
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117 */
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118
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110
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119 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
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0
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120
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121 #if (NGX_THREADS)
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122 rev->lock = pc->lock;
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123 wev->lock = pc->lock;
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124 rev->own_lock = &c->lock;
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125 wev->own_lock = &c->lock;
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126 #endif
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127
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128 if (ngx_add_conn) {
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129 if (ngx_add_conn(c) == NGX_ERROR) {
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130 return NGX_ERROR;
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131 }
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126
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132 }
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0
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133
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92
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134 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0,
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260
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135 "connect to %V, fd:%d #%d", pc->name, s, c->number);
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0
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136
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260
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137 rc = connect(s, pc->sockaddr, pc->socklen);
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0
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138
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139 if (rc == -1) {
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140 err = ngx_socket_errno;
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141
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142
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390
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143 if (err != NGX_EINPROGRESS
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144 #if (NGX_WIN32)
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145 /* Winsock returns WSAEWOULDBLOCK (NGX_EAGAIN) */
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146 && err != NGX_EAGAIN
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147 #endif
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148 )
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149 {
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364
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150 if (err == NGX_ECONNREFUSED
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390
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151 #if (NGX_LINUX)
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152 /*
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153 * Linux returns EAGAIN instead of ECONNREFUSED
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154 * for unix sockets if listen queue is full
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155 */
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156 || err == NGX_EAGAIN
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157 #endif
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454
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158 || err == NGX_ECONNRESET
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364
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159 || err == NGX_ENETDOWN
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160 || err == NGX_ENETUNREACH
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161 || err == NGX_EHOSTDOWN
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162 || err == NGX_EHOSTUNREACH)
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163 {
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90
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164 level = NGX_LOG_ERR;
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364
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165
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90
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166 } else {
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167 level = NGX_LOG_CRIT;
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168 }
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36
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169
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90
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170 ngx_log_error(level, c->log, err, "connect() to %V failed",
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260
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171 pc->name);
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0
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172
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92
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173 return NGX_DECLINED;
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0
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174 }
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175 }
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176
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177 if (ngx_add_conn) {
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178 if (rc == -1) {
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36
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179
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0
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180 /* NGX_EINPROGRESS */
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36
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181
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0
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182 return NGX_AGAIN;
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183 }
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126
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184
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0
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185 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
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32
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186
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187 wev->ready = 1;
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188
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0
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189 return NGX_OK;
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190 }
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191
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192 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
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193
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4
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194 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, ngx_socket_errno,
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195 "connect(): %d", rc);
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196
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0
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197 /* aio, iocp */
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198
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199 if (ngx_blocking(s) == -1) {
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200 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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201 ngx_blocking_n " failed");
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202 return NGX_ERROR;
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203 }
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204
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205 /*
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36
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206 * FreeBSD's aio allows to post an operation on non-connected socket.
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0
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207 * NT does not support it.
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126
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208 *
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0
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209 * TODO: check in Win32, etc. As workaround we can use NGX_ONESHOT_EVENT
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210 */
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126
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211
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0
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212 rev->ready = 1;
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213 wev->ready = 1;
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214
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215 return NGX_OK;
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216 }
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217
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36
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218 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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219
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220 /* kqueue */
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221
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0
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222 event = NGX_CLEAR_EVENT;
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223
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36
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224 } else {
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225
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226 /* select, poll, /dev/poll */
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227
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0
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228 event = NGX_LEVEL_EVENT;
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229 }
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230
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231 if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) {
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232 return NGX_ERROR;
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233 }
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234
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235 if (rc == -1) {
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236
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237 /* NGX_EINPROGRESS */
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238
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239 if (ngx_add_event(wev, NGX_WRITE_EVENT, event) != NGX_OK) {
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240 return NGX_ERROR;
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241 }
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242
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243 return NGX_AGAIN;
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244 }
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245
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246 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
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247
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248 wev->ready = 1;
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249
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250 return NGX_OK;
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251 }
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252
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253
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260
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254 ngx_int_t
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255 ngx_event_get_peer(ngx_peer_connection_t *pc, void *data)
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0
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256 {
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260
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257 return NGX_OK;
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0
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258 }
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