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annotate src/stream/ngx_stream_write_filter_module.c @ 7665:d127837c714f

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Stream: fixed processing of zero length UDP packets (ticket #1982).
author Vladimir Homutov <vl@nginx.com>
date Mon, 08 Jun 2020 11:40:34 +0300
parents a7ff19afbb14
children 32b0ba4855a6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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6692
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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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_stream.h>
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11
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12
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13 typedef struct {
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14 ngx_chain_t *from_upstream;
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15 ngx_chain_t *from_downstream;
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16 } ngx_stream_write_filter_ctx_t;
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17
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18
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19 static ngx_int_t ngx_stream_write_filter(ngx_stream_session_t *s,
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20 ngx_chain_t *in, ngx_uint_t from_upstream);
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21 static ngx_int_t ngx_stream_write_filter_init(ngx_conf_t *cf);
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22
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23
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24 static ngx_stream_module_t ngx_stream_write_filter_module_ctx = {
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25 NULL, /* preconfiguration */
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26 ngx_stream_write_filter_init, /* postconfiguration */
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27
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28 NULL, /* create main configuration */
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29 NULL, /* init main configuration */
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30
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31 NULL, /* create server configuration */
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32 NULL /* merge server configuration */
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33 };
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34
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35
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36 ngx_module_t ngx_stream_write_filter_module = {
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37 NGX_MODULE_V1,
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38 &ngx_stream_write_filter_module_ctx, /* module context */
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39 NULL, /* module directives */
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40 NGX_STREAM_MODULE, /* module type */
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41 NULL, /* init master */
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42 NULL, /* init module */
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43 NULL, /* init process */
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44 NULL, /* init thread */
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45 NULL, /* exit thread */
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46 NULL, /* exit process */
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47 NULL, /* exit master */
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48 NGX_MODULE_V1_PADDING
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49 };
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50
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51
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52 static ngx_int_t
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53 ngx_stream_write_filter(ngx_stream_session_t *s, ngx_chain_t *in,
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54 ngx_uint_t from_upstream)
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55 {
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56 off_t size;
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57 ngx_uint_t last, flush, sync;
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58 ngx_chain_t *cl, *ln, **ll, **out, *chain;
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59 ngx_connection_t *c;
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60 ngx_stream_write_filter_ctx_t *ctx;
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61
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62 ctx = ngx_stream_get_module_ctx(s, ngx_stream_write_filter_module);
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63
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64 if (ctx == NULL) {
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65 ctx = ngx_pcalloc(s->connection->pool,
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66 sizeof(ngx_stream_write_filter_ctx_t));
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67 if (ctx == NULL) {
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68 return NGX_ERROR;
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69 }
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70
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71 ngx_stream_set_ctx(s, ctx, ngx_stream_write_filter_module);
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72 }
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73
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74 if (from_upstream) {
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75 c = s->connection;
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76 out = &ctx->from_upstream;
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77
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78 } else {
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79 c = s->upstream->peer.connection;
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80 out = &ctx->from_downstream;
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81 }
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82
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83 if (c->error) {
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84 return NGX_ERROR;
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85 }
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86
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87 size = 0;
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88 flush = 0;
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89 sync = 0;
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90 last = 0;
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91 ll = out;
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92
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93 /* find the size, the flush point and the last link of the saved chain */
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94
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95 for (cl = *out; cl; cl = cl->next) {
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96 ll = &cl->next;
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97
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98 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0,
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99 "write old buf t:%d f:%d %p, pos %p, size: %z "
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100 "file: %O, size: %O",
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101 cl->buf->temporary, cl->buf->in_file,
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102 cl->buf->start, cl->buf->pos,
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103 cl->buf->last - cl->buf->pos,
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104 cl->buf->file_pos,
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105 cl->buf->file_last - cl->buf->file_pos);
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106
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107 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) {
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108 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
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109 "zero size buf in writer "
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110 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
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111 cl->buf->temporary,
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112 cl->buf->recycled,
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113 cl->buf->in_file,
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114 cl->buf->start,
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115 cl->buf->pos,
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116 cl->buf->last,
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117 cl->buf->file,
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118 cl->buf->file_pos,
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119 cl->buf->file_last);
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120
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121 ngx_debug_point();
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122 return NGX_ERROR;
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123 }
7401
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124
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125 if (ngx_buf_size(cl->buf) < 0) {
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126 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
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127 "negative size buf in writer "
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128 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
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129 cl->buf->temporary,
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130 cl->buf->recycled,
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131 cl->buf->in_file,
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132 cl->buf->start,
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133 cl->buf->pos,
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134 cl->buf->last,
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135 cl->buf->file,
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136 cl->buf->file_pos,
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137 cl->buf->file_last);
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138
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139 ngx_debug_point();
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140 return NGX_ERROR;
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141 }
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142
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143 size += ngx_buf_size(cl->buf);
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144
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145 if (cl->buf->flush || cl->buf->recycled) {
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146 flush = 1;
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147 }
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148
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149 if (cl->buf->sync) {
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150 sync = 1;
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151 }
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152
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153 if (cl->buf->last_buf) {
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154 last = 1;
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155 }
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156 }
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157
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158 /* add the new chain to the existent one */
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159
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160 for (ln = in; ln; ln = ln->next) {
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161 cl = ngx_alloc_chain_link(c->pool);
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162 if (cl == NULL) {
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163 return NGX_ERROR;
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Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
164 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
165
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
166 cl->buf = ln->buf;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
167 *ll = cl;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
168 ll = &cl->next;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
169
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
170 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
171 "write new buf t:%d f:%d %p, pos %p, size: %z "
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
172 "file: %O, size: %O",
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
173 cl->buf->temporary, cl->buf->in_file,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
174 cl->buf->start, cl->buf->pos,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
175 cl->buf->last - cl->buf->pos,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
176 cl->buf->file_pos,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
177 cl->buf->file_last - cl->buf->file_pos);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
178
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
179 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
180 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
181 "zero size buf in writer "
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
182 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
183 cl->buf->temporary,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
184 cl->buf->recycled,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
185 cl->buf->in_file,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
186 cl->buf->start,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
187 cl->buf->pos,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
188 cl->buf->last,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
189 cl->buf->file,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
190 cl->buf->file_pos,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
191 cl->buf->file_last);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
192
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
193 ngx_debug_point();
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
194 return NGX_ERROR;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
195 }
7401
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
196
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
197 if (ngx_buf_size(cl->buf) < 0) {
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
198 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
199 "negative size buf in writer "
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
200 "t:%d r:%d f:%d %p %p-%p %p %O-%O",
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
201 cl->buf->temporary,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
202 cl->buf->recycled,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
203 cl->buf->in_file,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
204 cl->buf->start,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
205 cl->buf->pos,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
206 cl->buf->last,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
207 cl->buf->file,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
208 cl->buf->file_pos,
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
209 cl->buf->file_last);
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
210
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
211 ngx_debug_point();
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
212 return NGX_ERROR;
a7ff19afbb14 Negative size buffers detection.
Maxim Dounin <mdounin@mdounin.ru>
parents: 6692
diff changeset
213 }
6692
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
214
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
215 size += ngx_buf_size(cl->buf);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
216
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
217 if (cl->buf->flush || cl->buf->recycled) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
218 flush = 1;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
219 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
220
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
221 if (cl->buf->sync) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
222 sync = 1;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
223 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
224
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
225 if (cl->buf->last_buf) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
226 last = 1;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
227 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
228 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
229
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
230 *ll = NULL;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
231
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
232 ngx_log_debug3(NGX_LOG_DEBUG_STREAM, c->log, 0,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
233 "stream write filter: l:%ui f:%ui s:%O", last, flush, size);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
234
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
235 if (size == 0
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
236 && !(c->buffered & NGX_LOWLEVEL_BUFFERED)
7665
d127837c714f Stream: fixed processing of zero length UDP packets (ticket #1982).
Vladimir Homutov <vl@nginx.com>
parents: 7401
diff changeset
237 && !(last && c->need_last_buf)
d127837c714f Stream: fixed processing of zero length UDP packets (ticket #1982).
Vladimir Homutov <vl@nginx.com>
parents: 7401
diff changeset
238 && !(c->type == SOCK_DGRAM && flush))
6692
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
239 {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
240 if (last || flush || sync) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
241 for (cl = *out; cl; /* void */) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
242 ln = cl;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
243 cl = cl->next;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
244 ngx_free_chain(c->pool, ln);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
245 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
246
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
247 *out = NULL;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
248 c->buffered &= ~NGX_STREAM_WRITE_BUFFERED;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
249
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
250 return NGX_OK;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
251 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
252
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
253 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
254 "the stream output chain is empty");
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
255
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
256 ngx_debug_point();
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
257
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
258 return NGX_ERROR;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
259 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
260
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
261 chain = c->send_chain(c, *out, 0);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
262
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
263 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
264 "stream write filter %p", chain);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
265
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
266 if (chain == NGX_CHAIN_ERROR) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
267 c->error = 1;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
268 return NGX_ERROR;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
269 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
270
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
271 for (cl = *out; cl && cl != chain; /* void */) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
272 ln = cl;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
273 cl = cl->next;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
274 ngx_free_chain(c->pool, ln);
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
275 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
276
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
277 *out = chain;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
278
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
279 if (chain) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
280 if (c->shared) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
281 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
282 "shared connection is busy");
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
283 return NGX_ERROR;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
284 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
285
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
286 c->buffered |= NGX_STREAM_WRITE_BUFFERED;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
287 return NGX_AGAIN;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
288 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
289
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
290 c->buffered &= ~NGX_STREAM_WRITE_BUFFERED;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
291
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
292 if (c->buffered & NGX_LOWLEVEL_BUFFERED) {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
293 return NGX_AGAIN;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
294 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
295
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
296 return NGX_OK;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
297 }
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
298
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
299
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
300 static ngx_int_t
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
301 ngx_stream_write_filter_init(ngx_conf_t *cf)
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
302 {
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
303 ngx_stream_top_filter = ngx_stream_write_filter;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
304
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
305 return NGX_OK;
56fc55e32f23 Stream: filters.
Roman Arutyunyan <arut@nginx.com>
parents:
diff changeset
306 }