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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18
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12 #if (NGX_HAVE_KQUEUE)
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0
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13
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14 ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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15 {
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16 ssize_t n;
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17 ngx_err_t err;
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18 ngx_event_t *rev;
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19
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20 rev = c->read;
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21
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4
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22 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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23 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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24 "recv: eof:%d, avail:%d, err:%d",
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25 rev->pending_eof, rev->available, rev->kq_errno);
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26
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27 if (rev->available == 0) {
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130
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28
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29 if (!rev->pending_eof) {
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30 return NGX_AGAIN;
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31 }
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32
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33 /* FreeBSD 5.x-6.x may erroneously report ETIMEDOUT */
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34 if (rev->kq_errno != NGX_ETIMEDOUT) {
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35
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0
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36 rev->ready = 0;
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37 rev->eof = 1;
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38
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39 if (rev->kq_errno) {
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40 rev->error = 1;
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41 ngx_set_socket_errno(rev->kq_errno);
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42
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86
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43 return ngx_connection_error(c, rev->kq_errno,
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44 "kevent() reported about an closed connection");
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0
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45 }
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46
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47 return 0;
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48 }
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49 }
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50 }
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51
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52 do {
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53 n = recv(c->fd, buf, size, 0);
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54
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55 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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56 "recv: fd:%d %d of %d", c->fd, n, size);
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57
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58 if (n >= 0) {
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4
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59 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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60 rev->available -= n;
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61
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62 /*
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63 * rev->available can be negative here because some additional
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64 * bytes can be received between kevent() and recv()
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65 */
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66
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67 if (rev->available <= 0) {
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68 if (!rev->pending_eof) {
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69 rev->ready = 0;
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70 }
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71
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72 if (rev->available < 0) {
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73 rev->available = 0;
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74 }
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75 }
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76
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77 return n;
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78 }
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79
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80 if ((size_t) n < size) {
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81 rev->ready = 0;
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82 }
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83
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84 if (n == 0) {
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85 rev->eof = 1;
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86 }
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87
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88 return n;
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89 }
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90
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91 err = ngx_socket_errno;
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92
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93 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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94 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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95 "recv() not ready");
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96 n = NGX_AGAIN;
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97
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98 } else {
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99 n = ngx_connection_error(c, err, "recv() failed");
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100 break;
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101 }
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102
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103 } while (err == NGX_EINTR);
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104
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105 rev->ready = 0;
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106
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107 if (n == NGX_ERROR){
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108 rev->error = 1;
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109 }
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110
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111 return n;
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112 }
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113
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18
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114 #else /* ! NGX_HAVE_KQUEUE */
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0
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115
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116 ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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117 {
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118 ssize_t n;
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119 ngx_err_t err;
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120 ngx_event_t *rev;
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121
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122 rev = c->read;
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123
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124 do {
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125 n = recv(c->fd, buf, size, 0);
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126
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127 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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128 "recv: fd:%d %d of %d", c->fd, n, size);
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129
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130 if (n == 0) {
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131 rev->ready = 0;
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132 rev->eof = 1;
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133 return n;
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134
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135 } else if (n > 0) {
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136
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137 if ((size_t) n < size
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4
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138 && !(ngx_event_flags & NGX_USE_GREEDY_EVENT))
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0
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139 {
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140 rev->ready = 0;
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141 }
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142
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143 return n;
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144 }
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145
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146 err = ngx_socket_errno;
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147
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148 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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149 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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150 "recv() not ready");
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151 n = NGX_AGAIN;
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152
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153 } else {
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154 n = ngx_connection_error(c, err, "recv() failed");
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155 break;
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156 }
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157
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158 } while (err == NGX_EINTR);
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159
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160 rev->ready = 0;
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161
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162 if (n == NGX_ERROR){
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163 rev->error = 1;
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164 }
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165
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166 return n;
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167 }
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168
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18
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169 #endif /* NGX_HAVE_KQUEUE */
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