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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
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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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354
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14 ssize_t
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15 ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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0
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16 {
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17 ssize_t n;
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18 ngx_err_t err;
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19 ngx_event_t *rev;
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20
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21 rev = c->read;
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22
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4
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23 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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24 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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25 "recv: eof:%d, avail:%d, err:%d",
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26 rev->pending_eof, rev->available, rev->kq_errno);
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27
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28 if (rev->available == 0) {
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136
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29 if (rev->pending_eof) {
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0
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30 rev->ready = 0;
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31 rev->eof = 1;
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32
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33 if (rev->kq_errno) {
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34 rev->error = 1;
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35 ngx_set_socket_errno(rev->kq_errno);
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36
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86
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37 return ngx_connection_error(c, rev->kq_errno,
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38 "kevent() reported about an closed connection");
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0
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39 }
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40
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41 return 0;
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136
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42
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43 } else {
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44 return NGX_AGAIN;
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0
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45 }
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46 }
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47 }
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48
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49 do {
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50 n = recv(c->fd, buf, size, 0);
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51
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52 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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53 "recv: fd:%d %d of %d", c->fd, n, size);
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54
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55 if (n >= 0) {
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4
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56 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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57 rev->available -= n;
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58
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59 /*
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132
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60 * rev->available may be negative here because some additional
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136
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61 * bytes may be received between kevent() and recv()
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0
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62 */
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63
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64 if (rev->available <= 0) {
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65 if (!rev->pending_eof) {
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66 rev->ready = 0;
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67 }
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68
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69 if (rev->available < 0) {
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70 rev->available = 0;
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71 }
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72 }
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73
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154
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74 if (n == 0) {
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75
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76 /*
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77 * on FreeBSD recv() may return 0 on closed socket
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78 * even if kqueue reported about available data
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79 */
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80
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81 rev->eof = 1;
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82 rev->available = 0;
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83 }
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84
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0
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85 return n;
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86 }
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87
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88 if ((size_t) n < size) {
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89 rev->ready = 0;
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90 }
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91
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92 if (n == 0) {
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93 rev->eof = 1;
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94 }
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95
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96 return n;
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97 }
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98
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99 err = ngx_socket_errno;
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100
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101 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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102 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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103 "recv() not ready");
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104 n = NGX_AGAIN;
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105
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106 } else {
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107 n = ngx_connection_error(c, err, "recv() failed");
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108 break;
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109 }
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110
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111 } while (err == NGX_EINTR);
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112
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113 rev->ready = 0;
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114
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115 if (n == NGX_ERROR){
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116 rev->error = 1;
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117 }
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118
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119 return n;
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120 }
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121
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18
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122 #else /* ! NGX_HAVE_KQUEUE */
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0
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123
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354
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124 ssize_t
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125 ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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0
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126 {
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127 ssize_t n;
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128 ngx_err_t err;
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129 ngx_event_t *rev;
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130
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131 rev = c->read;
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132
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133 do {
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134 n = recv(c->fd, buf, size, 0);
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135
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136 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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137 "recv: fd:%d %d of %d", c->fd, n, size);
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138
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139 if (n == 0) {
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140 rev->ready = 0;
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141 rev->eof = 1;
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142 return n;
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143
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144 } else if (n > 0) {
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145
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146 if ((size_t) n < size
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4
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147 && !(ngx_event_flags & NGX_USE_GREEDY_EVENT))
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0
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148 {
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149 rev->ready = 0;
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150 }
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151
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152 return n;
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153 }
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154
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155 err = ngx_socket_errno;
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156
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157 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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158 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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159 "recv() not ready");
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160 n = NGX_AGAIN;
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161
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162 } else {
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163 n = ngx_connection_error(c, err, "recv() failed");
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164 break;
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165 }
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166
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167 } while (err == NGX_EINTR);
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168
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169 rev->ready = 0;
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170
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171 if (n == NGX_ERROR){
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172 rev->error = 1;
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173 }
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174
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175 return n;
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176 }
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177
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18
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178 #endif /* NGX_HAVE_KQUEUE */
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