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2725
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4412
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4 * Copyright (C) Nginx, Inc.
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2725
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11
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12
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13 ssize_t
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14 ngx_wsasend(ngx_connection_t *c, u_char *buf, size_t size)
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15 {
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16 int n;
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17 u_long sent;
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18 ngx_err_t err;
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19 ngx_event_t *wev;
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20 WSABUF wsabuf;
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21
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22 wev = c->write;
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23
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24 if (!wev->ready) {
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25 return NGX_AGAIN;
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26 }
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27
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28 /*
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29 * WSABUF must be 4-byte aligned otherwise
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30 * WSASend() will return undocumented WSAEINVAL error.
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31 */
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32
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33 wsabuf.buf = (char *) buf;
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34 wsabuf.len = size;
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35
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36 sent = 0;
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37
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38 n = WSASend(c->fd, &wsabuf, 1, &sent, 0, NULL, NULL);
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39
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40 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
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41 "WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size);
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42
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43 if (n == 0) {
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44 if (sent < size) {
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45 wev->ready = 0;
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46 }
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47
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48 c->sent += sent;
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49
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50 return sent;
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51 }
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52
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53 err = ngx_socket_errno;
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54
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55 if (err == WSAEWOULDBLOCK) {
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56 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSASend() not ready");
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57 return NGX_AGAIN;
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58 }
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59
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60 wev->error = 1;
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61 ngx_connection_error(c, err, "WSASend() failed");
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62
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63 return NGX_ERROR;
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64 }
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65
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66
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67 ssize_t
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68 ngx_overlapped_wsasend(ngx_connection_t *c, u_char *buf, size_t size)
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69 {
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70 int n;
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71 u_long sent;
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72 ngx_err_t err;
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73 ngx_event_t *wev;
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74 LPWSAOVERLAPPED ovlp;
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75 WSABUF wsabuf;
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76
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77 wev = c->write;
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78
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79 if (!wev->ready) {
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80 return NGX_AGAIN;
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81 }
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82
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83 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
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84 "wev->complete: %d", wev->complete);
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85
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86 if (!wev->complete) {
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87
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88 /* post the overlapped WSASend() */
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89
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90 /*
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91 * WSABUFs must be 4-byte aligned otherwise
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92 * WSASend() will return undocumented WSAEINVAL error.
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93 */
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94
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95 wsabuf.buf = (char *) buf;
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96 wsabuf.len = size;
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97
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98 sent = 0;
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99
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100 ovlp = (LPWSAOVERLAPPED) &c->write->ovlp;
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101 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
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102
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103 n = WSASend(c->fd, &wsabuf, 1, &sent, 0, ovlp, NULL);
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104
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105 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
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106 "WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size);
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107
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108 wev->complete = 0;
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109
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110 if (n == 0) {
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111 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
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112
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113 /*
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114 * if a socket was bound with I/O completion port then
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115 * GetQueuedCompletionStatus() would anyway return its status
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116 * despite that WSASend() was already complete
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117 */
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118
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119 wev->active = 1;
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120 return NGX_AGAIN;
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121 }
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122
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123 if (sent < size) {
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124 wev->ready = 0;
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125 }
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126
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127 c->sent += sent;
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128
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129 return sent;
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130 }
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131
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132 err = ngx_socket_errno;
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133
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134 if (err == WSA_IO_PENDING) {
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135 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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136 "WSASend() posted");
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137 wev->active = 1;
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138 return NGX_AGAIN;
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139 }
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140
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141 wev->error = 1;
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142 ngx_connection_error(c, err, "WSASend() failed");
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143
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144 return NGX_ERROR;
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145 }
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146
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147 /* the overlapped WSASend() complete */
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148
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149 wev->complete = 0;
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150 wev->active = 0;
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151
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152 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
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153
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154 if (wev->ovlp.error) {
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155 ngx_connection_error(c, wev->ovlp.error, "WSASend() failed");
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156 return NGX_ERROR;
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157 }
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158
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159 sent = wev->available;
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160
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161 } else {
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162 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp,
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163 &sent, 0, NULL)
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164 == 0)
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165 {
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166 ngx_connection_error(c, ngx_socket_errno,
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167 "WSASend() or WSAGetOverlappedResult() failed");
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168
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169 return NGX_ERROR;
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170 }
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171 }
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172
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173 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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174 "WSAGetOverlappedResult: fd:%d, %ul of %uz",
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175 c->fd, sent, size);
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176
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177 if (sent < size) {
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178 wev->ready = 0;
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179 }
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180
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181 c->sent += sent;
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182
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183 return sent;
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184 }
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