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