Mercurial > hg > nginx
annotate src/os/unix/ngx_recv.c @ 6508:151fd02a4317
Simplified ngx_unix_recv() and ngx_readv_chain().
This makes ngx_unix_recv() and ngx_udp_unix_recv() differ minimally.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Fri, 08 Apr 2016 16:49:35 +0300 |
parents | 8ee94ecd3a50 |
children | f7849bfb6d21 |
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; |
253
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17 ngx_err_t err; |
96
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18 ngx_event_t *rev; |
91
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19 |
96
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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) { |
218
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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", |
375
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27 rev->pending_eof, rev->available, rev->kq_errno); |
91
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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"); | |
96
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40 } |
163
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41 |
96
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42 return 0; |
587 | 43 |
44 } else { | |
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reset ready flag if no data is available,
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45 rev->ready = 0; |
587 | 46 return NGX_AGAIN; |
96
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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 do { |
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54 n = recv(c->fd, buf, size, 0); |
91
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55 |
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56 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
6480 | 57 "recv: fd:%d %z of %uz", c->fd, n, size); |
93
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58 |
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Fixed small inconsistency in handling EOF among receive functions.
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59 if (n == 0) { |
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60 rev->ready = 0; |
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61 rev->eof = 1; |
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62 |
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63 #if (NGX_HAVE_KQUEUE) |
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64 |
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65 /* |
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66 * on FreeBSD recv() may return 0 on closed socket |
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67 * even if kqueue reported about available data |
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68 */ |
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69 |
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70 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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71 rev->available = 0; |
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72 } |
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73 |
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74 #endif |
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75 |
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76 return 0; |
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77 } |
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78 |
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79 if (n > 0) { |
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80 |
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81 #if (NGX_HAVE_KQUEUE) |
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82 |
455 | 83 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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84 rev->available -= n; |
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85 |
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86 /* |
583 | 87 * rev->available may be negative here because some additional |
587 | 88 * bytes may be received between kevent() and recv() |
163
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89 */ |
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90 |
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91 if (rev->available <= 0) { |
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92 if (!rev->pending_eof) { |
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93 rev->ready = 0; |
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94 } |
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95 |
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Simplified ngx_unix_recv() and ngx_readv_chain().
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96 rev->available = 0; |
96
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97 } |
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98 |
96
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99 return n; |
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100 } |
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101 |
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102 #endif |
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103 |
5267
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104 if ((size_t) n < size |
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105 && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) |
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106 { |
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107 rev->ready = 0; |
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108 } |
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109 |
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110 return n; |
91
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111 } |
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112 |
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113 err = ngx_socket_errno; |
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114 |
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115 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
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116 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
253
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117 "recv() not ready"); |
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118 n = NGX_AGAIN; |
91
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119 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
120 } else { |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
121 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
|
122 break; |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
123 } |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
124 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
125 } 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
|
126 |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
127 rev->ready = 0; |
0061d1f0908d
nginx-0.0.1-2003-11-18-11:04:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
|
128 |
3642 | 129 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
|
130 rev->error = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
131 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
132 |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
133 return n; |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
134 } |