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