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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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552
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57 goto failed;
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0
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58 }
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59 }
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60
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61 if (ngx_nonblocking(s) == -1) {
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62 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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63 ngx_nonblocking_n " failed");
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64
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552
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65 goto failed;
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66 }
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92
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67
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552
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68 if (pc->local) {
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69 if (bind(s, pc->local->sockaddr, pc->local->socklen) == -1) {
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70 ngx_log_error(NGX_LOG_CRIT, pc->log, ngx_socket_errno,
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71 "bind(%V) failed", &pc->local->name);
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72
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73 goto failed;
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0
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74 }
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75 }
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76
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92
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77 c->recv = ngx_recv;
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78 c->send = ngx_send;
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126
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79 c->recv_chain = ngx_recv_chain;
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92
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80 c->send_chain = ngx_send_chain;
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32
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81
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326
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82 c->sendfile = 1;
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83
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92
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84 c->log_error = pc->log_error;
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0
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85
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260
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86 if (pc->sockaddr->sa_family != AF_INET) {
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92
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87 c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
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88 c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
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132
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89
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90 #if (NGX_SOLARIS)
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91 /* Solaris's sendfilev() supports AF_NCA, AF_INET, and AF_INET6 */
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92 c->sendfile = 0;
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93 #endif
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0
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94 }
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95
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110
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96 rev = c->read;
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97 wev = c->write;
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0
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98
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99 rev->log = pc->log;
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100 wev->log = pc->log;
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101
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102 pc->connection = c;
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103
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104 /*
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110
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105 * TODO: MT: - ngx_atomic_fetch_add()
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0
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106 * or protection by critical section or mutex
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107 *
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108 * TODO: MP: - allocated in a shared memory
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110
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109 * - ngx_atomic_fetch_add()
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0
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110 * or protection by critical section or mutex
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111 */
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112
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110
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113 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
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0
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114
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115 #if (NGX_THREADS)
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116 rev->lock = pc->lock;
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117 wev->lock = pc->lock;
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118 rev->own_lock = &c->lock;
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119 wev->own_lock = &c->lock;
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120 #endif
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121
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122 if (ngx_add_conn) {
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123 if (ngx_add_conn(c) == NGX_ERROR) {
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552
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124 goto failed;
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0
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125 }
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126
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126 }
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0
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127
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92
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128 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0,
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260
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129 "connect to %V, fd:%d #%d", pc->name, s, c->number);
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0
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130
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260
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131 rc = connect(s, pc->sockaddr, pc->socklen);
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0
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132
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133 if (rc == -1) {
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134 err = ngx_socket_errno;
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135
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136
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392
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137 if (err != NGX_EINPROGRESS
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138 #if (NGX_WIN32)
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139 /* Winsock returns WSAEWOULDBLOCK (NGX_EAGAIN) */
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140 && err != NGX_EAGAIN
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141 #endif
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142 )
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143 {
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364
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144 if (err == NGX_ECONNREFUSED
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392
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145 #if (NGX_LINUX)
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146 /*
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147 * Linux returns EAGAIN instead of ECONNREFUSED
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148 * for unix sockets if listen queue is full
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149 */
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150 || err == NGX_EAGAIN
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151 #endif
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463
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152 || err == NGX_ECONNRESET
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364
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153 || err == NGX_ENETDOWN
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154 || err == NGX_ENETUNREACH
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155 || err == NGX_EHOSTDOWN
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156 || err == NGX_EHOSTUNREACH)
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157 {
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90
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158 level = NGX_LOG_ERR;
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364
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159
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90
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160 } else {
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161 level = NGX_LOG_CRIT;
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162 }
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36
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163
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90
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164 ngx_log_error(level, c->log, err, "connect() to %V failed",
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260
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165 pc->name);
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0
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166
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92
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167 return NGX_DECLINED;
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0
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168 }
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169 }
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170
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171 if (ngx_add_conn) {
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172 if (rc == -1) {
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36
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173
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0
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174 /* NGX_EINPROGRESS */
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36
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175
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0
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176 return NGX_AGAIN;
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177 }
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126
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178
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0
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179 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
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32
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180
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181 wev->ready = 1;
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182
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0
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183 return NGX_OK;
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184 }
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185
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186 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
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187
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4
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188 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, ngx_socket_errno,
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189 "connect(): %d", rc);
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190
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0
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191 /* aio, iocp */
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192
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193 if (ngx_blocking(s) == -1) {
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194 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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195 ngx_blocking_n " failed");
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552
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196 goto failed;
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0
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197 }
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198
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199 /*
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36
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200 * FreeBSD's aio allows to post an operation on non-connected socket.
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0
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201 * NT does not support it.
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126
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202 *
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0
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203 * TODO: check in Win32, etc. As workaround we can use NGX_ONESHOT_EVENT
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204 */
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126
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205
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0
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206 rev->ready = 1;
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207 wev->ready = 1;
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208
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209 return NGX_OK;
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210 }
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211
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36
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212 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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213
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214 /* kqueue */
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215
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0
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216 event = NGX_CLEAR_EVENT;
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217
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36
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218 } else {
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219
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220 /* select, poll, /dev/poll */
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221
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0
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222 event = NGX_LEVEL_EVENT;
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223 }
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224
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225 if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) {
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552
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226 goto failed;
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0
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227 }
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228
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229 if (rc == -1) {
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230
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231 /* NGX_EINPROGRESS */
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232
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233 if (ngx_add_event(wev, NGX_WRITE_EVENT, event) != NGX_OK) {
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552
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234 goto failed;
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0
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235 }
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236
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237 return NGX_AGAIN;
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238 }
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239
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240 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
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241
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242 wev->ready = 1;
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243
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244 return NGX_OK;
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552
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245
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246 failed:
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247
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248 ngx_free_connection(c);
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249
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250 if (ngx_close_socket(s) == -1) {
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251 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
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252 ngx_close_socket_n " failed");
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253 }
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254
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255 return NGX_ERROR;
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0
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256 }
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257
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258
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260
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259 ngx_int_t
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260 ngx_event_get_peer(ngx_peer_connection_t *pc, void *data)
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0
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261 {
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260
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262 return NGX_OK;
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0
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263 }
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