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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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660
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4 * Copyright (C) Nginx, Inc.
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0
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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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18
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13 #if (NGX_HAVE_KQUEUE)
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0
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14
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354
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15 ssize_t
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16 ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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0
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17 {
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18 ssize_t n;
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19 ngx_err_t err;
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20 ngx_event_t *rev;
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21
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22 rev = c->read;
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23
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4
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24 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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25 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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26 "recv: eof:%d, avail:%d, err:%d",
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27 rev->pending_eof, rev->available, rev->kq_errno);
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28
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29 if (rev->available == 0) {
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136
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30 if (rev->pending_eof) {
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0
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31 rev->ready = 0;
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32 rev->eof = 1;
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33
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34 if (rev->kq_errno) {
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35 rev->error = 1;
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36 ngx_set_socket_errno(rev->kq_errno);
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37
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86
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38 return ngx_connection_error(c, rev->kq_errno,
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39 "kevent() reported about an closed connection");
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0
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40 }
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41
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42 return 0;
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136
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43
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44 } else {
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364
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45 rev->ready = 0;
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136
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46 return NGX_AGAIN;
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0
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47 }
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48 }
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49 }
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50
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51 do {
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52 n = recv(c->fd, buf, size, 0);
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53
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54 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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55 "recv: fd:%d %d of %d", c->fd, n, size);
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56
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57 if (n >= 0) {
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4
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58 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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0
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59 rev->available -= n;
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60
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61 /*
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132
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62 * rev->available may be negative here because some additional
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136
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63 * bytes may be received between kevent() and recv()
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0
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64 */
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65
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66 if (rev->available <= 0) {
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67 if (!rev->pending_eof) {
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68 rev->ready = 0;
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69 }
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70
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71 if (rev->available < 0) {
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72 rev->available = 0;
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73 }
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74 }
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75
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154
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76 if (n == 0) {
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77
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78 /*
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79 * on FreeBSD recv() may return 0 on closed socket
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80 * even if kqueue reported about available data
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81 */
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82
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83 rev->eof = 1;
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84 rev->available = 0;
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85 }
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86
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0
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87 return n;
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88 }
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89
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90 if ((size_t) n < size) {
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91 rev->ready = 0;
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92 }
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93
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94 if (n == 0) {
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95 rev->eof = 1;
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96 }
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97
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98 return n;
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99 }
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100
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101 err = ngx_socket_errno;
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102
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103 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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104 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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105 "recv() not ready");
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106 n = NGX_AGAIN;
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107
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108 } else {
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109 n = ngx_connection_error(c, err, "recv() failed");
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110 break;
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111 }
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112
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113 } while (err == NGX_EINTR);
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114
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115 rev->ready = 0;
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116
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582
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117 if (n == NGX_ERROR) {
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0
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118 rev->error = 1;
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119 }
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120
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121 return n;
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122 }
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123
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18
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124 #else /* ! NGX_HAVE_KQUEUE */
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0
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125
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354
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126 ssize_t
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127 ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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0
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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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582
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173 if (n == NGX_ERROR) {
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0
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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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