Mercurial > hg > nginx
annotate src/os/unix/ngx_recv.c @ 6791:cb4a4e9bba8e
Perl: fixed optimization in SSI command handler.
As the pointer to the first argument was tested instead of the argument
itself, array of arguments was always created, even if there were no
arguments. Fix is to test args[0] instead of args.
Found by Coverity (CID 1356862).
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 01 Nov 2016 20:39:21 +0300 |
parents | f7849bfb6d21 |
children | efd71d49bde0 |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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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 |
1680 | 13 ssize_t |
14 ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size) | |
91
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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; |
91
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21 |
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22 #if (NGX_HAVE_KQUEUE) |
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23 |
455 | 24 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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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) { |
587 | 30 if (rev->pending_eof) { |
148
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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 |
537 | 38 return ngx_connection_error(c, rev->kq_errno, |
39 "kevent() reported about an closed connection"); | |
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40 } |
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41 |
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42 return 0; |
587 | 43 |
44 } else { | |
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45 rev->ready = 0; |
587 | 46 return NGX_AGAIN; |
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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 #endif |
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52 |
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53 #if (NGX_HAVE_EPOLLRDHUP) |
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54 |
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55 if (ngx_event_flags & NGX_USE_EPOLL_EVENT) { |
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56 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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57 "recv: eof:%d, avail:%d", |
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58 rev->pending_eof, rev->available); |
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59 |
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60 if (!rev->available && !rev->pending_eof) { |
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61 rev->ready = 0; |
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62 return NGX_AGAIN; |
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63 } |
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64 } |
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65 |
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66 #endif |
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67 |
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68 do { |
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69 n = recv(c->fd, buf, size, 0); |
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70 |
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71 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
6480 | 72 "recv: fd:%d %z of %uz", c->fd, n, size); |
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73 |
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74 if (n == 0) { |
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75 rev->ready = 0; |
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76 rev->eof = 1; |
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77 |
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78 #if (NGX_HAVE_KQUEUE) |
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79 |
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80 /* |
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81 * on FreeBSD recv() may return 0 on closed socket |
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82 * even if kqueue reported about available data |
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83 */ |
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84 |
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85 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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86 rev->available = 0; |
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87 } |
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88 |
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89 #endif |
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90 |
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91 return 0; |
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92 } |
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93 |
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94 if (n > 0) { |
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95 |
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96 #if (NGX_HAVE_KQUEUE) |
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97 |
455 | 98 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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99 rev->available -= n; |
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100 |
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101 /* |
583 | 102 * rev->available may be negative here because some additional |
587 | 103 * bytes may be received between kevent() and recv() |
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104 */ |
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105 |
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106 if (rev->available <= 0) { |
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107 if (!rev->pending_eof) { |
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108 rev->ready = 0; |
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109 } |
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110 |
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111 rev->available = 0; |
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112 } |
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113 |
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114 return n; |
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115 } |
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116 |
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117 #endif |
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118 |
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119 #if (NGX_HAVE_EPOLLRDHUP) |
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120 |
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121 if ((ngx_event_flags & NGX_USE_EPOLL_EVENT) |
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Improved EPOLLRDHUP handling.
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122 && ngx_use_epoll_rdhup) |
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123 { |
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124 if ((size_t) n < size) { |
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125 if (!rev->pending_eof) { |
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126 rev->ready = 0; |
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127 } |
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128 |
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129 rev->available = 0; |
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130 } |
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131 |
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132 return n; |
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133 } |
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134 |
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135 #endif |
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136 |
5267
13c006f0c40e
Events: honor NGX_USE_GREEDY_EVENT when kqueue support is enabled.
Valentin Bartenev <vbart@nginx.com>
parents:
4412
diff
changeset
|
137 if ((size_t) n < size |
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Events: honor NGX_USE_GREEDY_EVENT when kqueue support is enabled.
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138 && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) |
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Events: honor NGX_USE_GREEDY_EVENT when kqueue support is enabled.
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parents:
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139 { |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
|
140 rev->ready = 0; |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
|
141 } |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
|
142 |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
93
diff
changeset
|
143 return n; |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
144 } |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
145 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
146 err = ngx_socket_errno; |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
147 |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
148 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
257
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
256
diff
changeset
|
149 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
150 "recv() not ready"); |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
151 n = NGX_AGAIN; |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
152 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
153 } else { |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
154 n = ngx_connection_error(c, err, "recv() failed"); |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
155 break; |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
156 } |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
157 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
158 } while (err == NGX_EINTR); |
188
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
159 |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
160 rev->ready = 0; |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
161 |
3642 | 162 if (n == NGX_ERROR) { |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
163 rev->error = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
164 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
165 |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
166 return n; |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
167 } |