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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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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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136
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28 if (rev->pending_eof) {
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0
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29 rev->ready = 0;
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30 rev->eof = 1;
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31
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32 if (rev->kq_errno) {
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33 rev->error = 1;
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34 ngx_set_socket_errno(rev->kq_errno);
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35
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86
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36 return ngx_connection_error(c, rev->kq_errno,
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37 "kevent() reported about an closed connection");
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0
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38 }
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39
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40 return 0;
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136
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41
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42 } else {
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43 return NGX_AGAIN;
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0
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44 }
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45 }
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46 }
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47
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48 do {
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49 n = recv(c->fd, buf, size, 0);
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50
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51 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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52 "recv: fd:%d %d of %d", c->fd, n, size);
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53
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54 if (n >= 0) {
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4
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55 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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56 rev->available -= n;
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57
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58 /*
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132
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59 * rev->available may be negative here because some additional
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136
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60 * bytes may be received between kevent() and recv()
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0
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61 */
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62
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63 if (rev->available <= 0) {
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64 if (!rev->pending_eof) {
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65 rev->ready = 0;
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66 }
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67
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68 if (rev->available < 0) {
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69 rev->available = 0;
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70 }
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71 }
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72
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154
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73 if (n == 0) {
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74
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75 /*
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76 * on FreeBSD recv() may return 0 on closed socket
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77 * even if kqueue reported about available data
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78 */
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79
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80 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
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81 "recv() returned 0 while keevnt() reported "
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82 "%d available bytes", rev->available);
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83
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84 rev->eof = 1;
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85 rev->available = 0;
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86 }
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87
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0
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88 return n;
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89 }
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90
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91 if ((size_t) n < size) {
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92 rev->ready = 0;
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93 }
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94
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95 if (n == 0) {
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96 rev->eof = 1;
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97 }
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98
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99 return n;
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100 }
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101
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102 err = ngx_socket_errno;
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103
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104 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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105 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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106 "recv() not ready");
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107 n = NGX_AGAIN;
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108
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109 } else {
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110 n = ngx_connection_error(c, err, "recv() failed");
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111 break;
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112 }
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113
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114 } while (err == NGX_EINTR);
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115
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116 rev->ready = 0;
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117
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118 if (n == NGX_ERROR){
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119 rev->error = 1;
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120 }
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121
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122 return n;
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123 }
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124
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18
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125 #else /* ! NGX_HAVE_KQUEUE */
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0
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126
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127 ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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128 {
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129 ssize_t n;
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130 ngx_err_t err;
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131 ngx_event_t *rev;
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132
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133 rev = c->read;
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134
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135 do {
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136 n = recv(c->fd, buf, size, 0);
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137
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138 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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139 "recv: fd:%d %d of %d", c->fd, n, size);
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140
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141 if (n == 0) {
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142 rev->ready = 0;
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143 rev->eof = 1;
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144 return n;
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145
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146 } else if (n > 0) {
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147
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148 if ((size_t) n < size
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4
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149 && !(ngx_event_flags & NGX_USE_GREEDY_EVENT))
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0
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150 {
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151 rev->ready = 0;
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152 }
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153
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154 return n;
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155 }
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156
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157 err = ngx_socket_errno;
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158
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159 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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160 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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161 "recv() not ready");
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162 n = NGX_AGAIN;
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163
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164 } else {
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165 n = ngx_connection_error(c, err, "recv() failed");
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166 break;
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167 }
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168
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169 } while (err == NGX_EINTR);
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170
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171 rev->ready = 0;
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172
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173 if (n == NGX_ERROR){
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174 rev->error = 1;
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175 }
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176
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177 return n;
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178 }
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179
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18
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180 #endif /* NGX_HAVE_KQUEUE */
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