Mercurial > hg > nginx
annotate src/stream/ngx_stream_limit_conn_module.c @ 7205:fc4d82c13c04
Core: added a stub for additional zone configuration.
author | Vladimir Homutov <vl@nginx.com> |
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date | Thu, 15 Feb 2018 16:08:05 +0300 |
parents | 3908156a51fa |
children | 359b0ea2b067 |
rev | line source |
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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 u_char color; |
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15 u_char len; |
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16 u_short conn; |
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17 u_char data[1]; |
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18 } ngx_stream_limit_conn_node_t; |
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19 |
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20 |
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21 typedef struct { |
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22 ngx_shm_zone_t *shm_zone; |
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23 ngx_rbtree_node_t *node; |
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24 } ngx_stream_limit_conn_cleanup_t; |
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25 |
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26 |
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27 typedef struct { |
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28 ngx_rbtree_t *rbtree; |
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29 ngx_stream_complex_value_t key; |
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30 } ngx_stream_limit_conn_ctx_t; |
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31 |
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32 |
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33 typedef struct { |
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34 ngx_shm_zone_t *shm_zone; |
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35 ngx_uint_t conn; |
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36 } ngx_stream_limit_conn_limit_t; |
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37 |
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38 |
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39 typedef struct { |
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40 ngx_array_t limits; |
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41 ngx_uint_t log_level; |
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42 } ngx_stream_limit_conn_conf_t; |
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43 |
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44 |
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45 static ngx_rbtree_node_t *ngx_stream_limit_conn_lookup(ngx_rbtree_t *rbtree, |
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46 ngx_str_t *key, uint32_t hash); |
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47 static void ngx_stream_limit_conn_cleanup(void *data); |
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48 static ngx_inline void ngx_stream_limit_conn_cleanup_all(ngx_pool_t *pool); |
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49 |
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50 static void *ngx_stream_limit_conn_create_conf(ngx_conf_t *cf); |
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51 static char *ngx_stream_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, |
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52 void *child); |
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53 static char *ngx_stream_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
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54 void *conf); |
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55 static char *ngx_stream_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, |
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56 void *conf); |
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57 static ngx_int_t ngx_stream_limit_conn_init(ngx_conf_t *cf); |
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58 |
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59 |
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60 static ngx_conf_enum_t ngx_stream_limit_conn_log_levels[] = { |
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61 { ngx_string("info"), NGX_LOG_INFO }, |
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62 { ngx_string("notice"), NGX_LOG_NOTICE }, |
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63 { ngx_string("warn"), NGX_LOG_WARN }, |
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64 { ngx_string("error"), NGX_LOG_ERR }, |
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65 { ngx_null_string, 0 } |
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66 }; |
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67 |
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68 |
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69 static ngx_command_t ngx_stream_limit_conn_commands[] = { |
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70 |
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71 { ngx_string("limit_conn_zone"), |
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72 NGX_STREAM_MAIN_CONF|NGX_CONF_TAKE2, |
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73 ngx_stream_limit_conn_zone, |
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74 0, |
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75 0, |
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76 NULL }, |
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77 |
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78 { ngx_string("limit_conn"), |
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79 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE2, |
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80 ngx_stream_limit_conn, |
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81 NGX_STREAM_SRV_CONF_OFFSET, |
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82 0, |
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83 NULL }, |
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84 |
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85 { ngx_string("limit_conn_log_level"), |
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86 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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87 ngx_conf_set_enum_slot, |
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88 NGX_STREAM_SRV_CONF_OFFSET, |
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89 offsetof(ngx_stream_limit_conn_conf_t, log_level), |
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90 &ngx_stream_limit_conn_log_levels }, |
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91 |
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92 ngx_null_command |
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93 }; |
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94 |
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95 |
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96 static ngx_stream_module_t ngx_stream_limit_conn_module_ctx = { |
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97 NULL, /* preconfiguration */ |
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98 ngx_stream_limit_conn_init, /* postconfiguration */ |
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99 |
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100 NULL, /* create main configuration */ |
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101 NULL, /* init main configuration */ |
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102 |
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103 ngx_stream_limit_conn_create_conf, /* create server configuration */ |
6629 | 104 ngx_stream_limit_conn_merge_conf /* merge server configuration */ |
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105 }; |
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106 |
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107 |
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108 ngx_module_t ngx_stream_limit_conn_module = { |
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109 NGX_MODULE_V1, |
6601 | 110 &ngx_stream_limit_conn_module_ctx, /* module context */ |
111 ngx_stream_limit_conn_commands, /* module directives */ | |
112 NGX_STREAM_MODULE, /* module type */ | |
113 NULL, /* init master */ | |
114 NULL, /* init module */ | |
115 NULL, /* init process */ | |
116 NULL, /* init thread */ | |
117 NULL, /* exit thread */ | |
118 NULL, /* exit process */ | |
119 NULL, /* exit master */ | |
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120 NGX_MODULE_V1_PADDING |
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121 }; |
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122 |
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123 |
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124 static ngx_int_t |
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125 ngx_stream_limit_conn_handler(ngx_stream_session_t *s) |
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126 { |
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127 size_t n; |
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128 uint32_t hash; |
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129 ngx_str_t key; |
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130 ngx_uint_t i; |
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131 ngx_slab_pool_t *shpool; |
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132 ngx_rbtree_node_t *node; |
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133 ngx_pool_cleanup_t *cln; |
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134 ngx_stream_limit_conn_ctx_t *ctx; |
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135 ngx_stream_limit_conn_node_t *lc; |
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136 ngx_stream_limit_conn_conf_t *lccf; |
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137 ngx_stream_limit_conn_limit_t *limits; |
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138 ngx_stream_limit_conn_cleanup_t *lccln; |
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|
139 |
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|
140 lccf = ngx_stream_get_module_srv_conf(s, ngx_stream_limit_conn_module); |
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Stream: connection limiting module.
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parents:
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|
141 limits = lccf->limits.elts; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
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|
142 |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
143 for (i = 0; i < lccf->limits.nelts; i++) { |
0dcef374b8bb
Stream: connection limiting module.
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parents:
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|
144 ctx = limits[i].shm_zone->data; |
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Stream: connection limiting module.
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parents:
diff
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|
145 |
6610
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|
146 if (ngx_stream_complex_value(s, &ctx->key, &key) != NGX_OK) { |
d5b5866c06c4
Stream: got rid of pseudo variables.
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6606
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|
147 return NGX_ERROR; |
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Stream: got rid of pseudo variables.
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|
148 } |
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Stream: got rid of pseudo variables.
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|
149 |
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diff
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|
150 if (key.len == 0) { |
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Stream: got rid of pseudo variables.
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|
151 continue; |
d5b5866c06c4
Stream: got rid of pseudo variables.
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parents:
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|
152 } |
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Stream: got rid of pseudo variables.
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|
153 |
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diff
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|
154 if (key.len > 255) { |
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Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
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|
155 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, |
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Stream: got rid of pseudo variables.
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parents:
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|
156 "the value of the \"%V\" key " |
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Stream: got rid of pseudo variables.
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parents:
6606
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|
157 "is more than 255 bytes: \"%V\"", |
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Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
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|
158 &ctx->key.value, &key); |
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Stream: got rid of pseudo variables.
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parents:
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|
159 continue; |
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Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
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|
160 } |
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Stream: got rid of pseudo variables.
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|
161 |
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Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
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|
162 hash = ngx_crc32_short(key.data, key.len); |
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Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
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|
163 |
6197
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|
164 shpool = (ngx_slab_pool_t *) limits[i].shm_zone->shm.addr; |
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Stream: connection limiting module.
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|
165 |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
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|
166 ngx_shmtx_lock(&shpool->mutex); |
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Stream: connection limiting module.
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|
167 |
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Stream: connection limiting module.
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parents:
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|
168 node = ngx_stream_limit_conn_lookup(ctx->rbtree, &key, hash); |
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Stream: connection limiting module.
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parents:
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|
169 |
0dcef374b8bb
Stream: connection limiting module.
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parents:
diff
changeset
|
170 if (node == NULL) { |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
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|
171 |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
172 n = offsetof(ngx_rbtree_node_t, color) |
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Stream: connection limiting module.
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parents:
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|
173 + offsetof(ngx_stream_limit_conn_node_t, data) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
174 + key.len; |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
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|
175 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
176 node = ngx_slab_alloc_locked(shpool, n); |
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Stream: connection limiting module.
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parents:
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|
177 |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
178 if (node == NULL) { |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
179 ngx_shmtx_unlock(&shpool->mutex); |
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Stream: connection limiting module.
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|
180 ngx_stream_limit_conn_cleanup_all(s->connection->pool); |
6693 | 181 return NGX_STREAM_SERVICE_UNAVAILABLE; |
6197
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Stream: connection limiting module.
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|
182 } |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
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|
183 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
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|
184 lc = (ngx_stream_limit_conn_node_t *) &node->color; |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
185 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
186 node->key = hash; |
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
187 lc->len = (u_char) key.len; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
188 lc->conn = 1; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
189 ngx_memcpy(lc->data, key.data, key.len); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
190 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
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|
191 ngx_rbtree_insert(ctx->rbtree, node); |
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Stream: connection limiting module.
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parents:
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|
192 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
193 } else { |
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Stream: connection limiting module.
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parents:
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|
194 |
0dcef374b8bb
Stream: connection limiting module.
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parents:
diff
changeset
|
195 lc = (ngx_stream_limit_conn_node_t *) &node->color; |
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Stream: connection limiting module.
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parents:
diff
changeset
|
196 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
197 if ((ngx_uint_t) lc->conn >= limits[i].conn) { |
0dcef374b8bb
Stream: connection limiting module.
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parents:
diff
changeset
|
198 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
199 ngx_shmtx_unlock(&shpool->mutex); |
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Stream: connection limiting module.
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diff
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|
200 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
201 ngx_log_error(lccf->log_level, s->connection->log, 0, |
0dcef374b8bb
Stream: connection limiting module.
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diff
changeset
|
202 "limiting connections by zone \"%V\"", |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
203 &limits[i].shm_zone->shm.name); |
0dcef374b8bb
Stream: connection limiting module.
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parents:
diff
changeset
|
204 |
0dcef374b8bb
Stream: connection limiting module.
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parents:
diff
changeset
|
205 ngx_stream_limit_conn_cleanup_all(s->connection->pool); |
6693 | 206 return NGX_STREAM_SERVICE_UNAVAILABLE; |
6197
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Stream: connection limiting module.
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parents:
diff
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|
207 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
208 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
209 lc->conn++; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
210 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
211 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
212 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, |
6480 | 213 "limit conn: %08Xi %d", node->key, lc->conn); |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
214 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
215 ngx_shmtx_unlock(&shpool->mutex); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
216 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
217 cln = ngx_pool_cleanup_add(s->connection->pool, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
218 sizeof(ngx_stream_limit_conn_cleanup_t)); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
219 if (cln == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
220 return NGX_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
221 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
222 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
223 cln->handler = ngx_stream_limit_conn_cleanup; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
224 lccln = cln->data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
225 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
226 lccln->shm_zone = limits[i].shm_zone; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
227 lccln->node = node; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
228 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
229 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
230 return NGX_DECLINED; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
231 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
232 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
233 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
234 static void |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
235 ngx_stream_limit_conn_rbtree_insert_value(ngx_rbtree_node_t *temp, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
236 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
237 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
238 ngx_rbtree_node_t **p; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
239 ngx_stream_limit_conn_node_t *lcn, *lcnt; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
240 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
241 for ( ;; ) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
242 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
243 if (node->key < temp->key) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
244 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
245 p = &temp->left; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
246 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
247 } else if (node->key > temp->key) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
248 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
249 p = &temp->right; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
250 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
251 } else { /* node->key == temp->key */ |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
252 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
253 lcn = (ngx_stream_limit_conn_node_t *) &node->color; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
254 lcnt = (ngx_stream_limit_conn_node_t *) &temp->color; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
255 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
256 p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
257 ? &temp->left : &temp->right; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
258 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
259 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
260 if (*p == sentinel) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
261 break; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
262 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
263 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
264 temp = *p; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
265 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
266 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
267 *p = node; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
268 node->parent = temp; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
269 node->left = sentinel; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
270 node->right = sentinel; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
271 ngx_rbt_red(node); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
272 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
273 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
274 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
275 static ngx_rbtree_node_t * |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
276 ngx_stream_limit_conn_lookup(ngx_rbtree_t *rbtree, ngx_str_t *key, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
277 uint32_t hash) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
278 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
279 ngx_int_t rc; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
280 ngx_rbtree_node_t *node, *sentinel; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
281 ngx_stream_limit_conn_node_t *lcn; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
282 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
283 node = rbtree->root; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
284 sentinel = rbtree->sentinel; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
285 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
286 while (node != sentinel) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
287 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
288 if (hash < node->key) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
289 node = node->left; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
290 continue; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
291 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
292 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
293 if (hash > node->key) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
294 node = node->right; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
295 continue; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
296 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
297 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
298 /* hash == node->key */ |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
299 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
300 lcn = (ngx_stream_limit_conn_node_t *) &node->color; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
301 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
302 rc = ngx_memn2cmp(key->data, lcn->data, key->len, (size_t) lcn->len); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
303 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
304 if (rc == 0) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
305 return node; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
306 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
307 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
308 node = (rc < 0) ? node->left : node->right; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
309 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
310 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
311 return NULL; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
312 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
313 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
314 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
315 static void |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
316 ngx_stream_limit_conn_cleanup(void *data) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
317 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
318 ngx_stream_limit_conn_cleanup_t *lccln = data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
319 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
320 ngx_slab_pool_t *shpool; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
321 ngx_rbtree_node_t *node; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
322 ngx_stream_limit_conn_ctx_t *ctx; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
323 ngx_stream_limit_conn_node_t *lc; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
324 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
325 ctx = lccln->shm_zone->data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
326 shpool = (ngx_slab_pool_t *) lccln->shm_zone->shm.addr; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
327 node = lccln->node; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
328 lc = (ngx_stream_limit_conn_node_t *) &node->color; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
329 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
330 ngx_shmtx_lock(&shpool->mutex); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
331 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
332 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, lccln->shm_zone->shm.log, 0, |
6480 | 333 "limit conn cleanup: %08Xi %d", node->key, lc->conn); |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
334 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
335 lc->conn--; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
336 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
337 if (lc->conn == 0) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
338 ngx_rbtree_delete(ctx->rbtree, node); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
339 ngx_slab_free_locked(shpool, node); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
340 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
341 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
342 ngx_shmtx_unlock(&shpool->mutex); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
343 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
344 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
345 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
346 static ngx_inline void |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
347 ngx_stream_limit_conn_cleanup_all(ngx_pool_t *pool) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
348 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
349 ngx_pool_cleanup_t *cln; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
350 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
351 cln = pool->cleanup; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
352 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
353 while (cln && cln->handler == ngx_stream_limit_conn_cleanup) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
354 ngx_stream_limit_conn_cleanup(cln->data); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
355 cln = cln->next; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
356 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
357 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
358 pool->cleanup = cln; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
359 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
360 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
361 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
362 static ngx_int_t |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
363 ngx_stream_limit_conn_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
364 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
365 ngx_stream_limit_conn_ctx_t *octx = data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
366 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
367 size_t len; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
368 ngx_slab_pool_t *shpool; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
369 ngx_rbtree_node_t *sentinel; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
370 ngx_stream_limit_conn_ctx_t *ctx; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
371 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
372 ctx = shm_zone->data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
373 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
374 if (octx) { |
6610
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
375 if (ctx->key.value.len != octx->key.value.len |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
376 || ngx_strncmp(ctx->key.value.data, octx->key.value.data, |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
377 ctx->key.value.len) |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
378 != 0) |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
379 { |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
380 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
381 "limit_conn_zone \"%V\" uses the \"%V\" key " |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
382 "while previously it used the \"%V\" key", |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
383 &shm_zone->shm.name, &ctx->key.value, |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
384 &octx->key.value); |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
385 return NGX_ERROR; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
386 } |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
387 |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
388 ctx->rbtree = octx->rbtree; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
389 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
390 return NGX_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
391 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
392 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
393 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
394 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
395 if (shm_zone->shm.exists) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
396 ctx->rbtree = shpool->data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
397 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
398 return NGX_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
399 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
400 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
401 ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
402 if (ctx->rbtree == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
403 return NGX_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
404 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
405 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
406 shpool->data = ctx->rbtree; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
407 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
408 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
409 if (sentinel == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
410 return NGX_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
411 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
412 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
413 ngx_rbtree_init(ctx->rbtree, sentinel, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
414 ngx_stream_limit_conn_rbtree_insert_value); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
415 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
416 len = sizeof(" in limit_conn_zone \"\"") + shm_zone->shm.name.len; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
417 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
418 shpool->log_ctx = ngx_slab_alloc(shpool, len); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
419 if (shpool->log_ctx == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
420 return NGX_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
421 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
422 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
423 ngx_sprintf(shpool->log_ctx, " in limit_conn_zone \"%V\"%Z", |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
424 &shm_zone->shm.name); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
425 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
426 return NGX_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
427 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
428 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
429 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
430 static void * |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
431 ngx_stream_limit_conn_create_conf(ngx_conf_t *cf) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
432 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
433 ngx_stream_limit_conn_conf_t *conf; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
434 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
435 conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_limit_conn_conf_t)); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
436 if (conf == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
437 return NULL; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
438 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
439 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
440 /* |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
441 * set by ngx_pcalloc(): |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
442 * |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
443 * conf->limits.elts = NULL; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
444 */ |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
445 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
446 conf->log_level = NGX_CONF_UNSET_UINT; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
447 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
448 return conf; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
449 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
450 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
451 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
452 static char * |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
453 ngx_stream_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
454 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
455 ngx_stream_limit_conn_conf_t *prev = parent; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
456 ngx_stream_limit_conn_conf_t *conf = child; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
457 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
458 if (conf->limits.elts == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
459 conf->limits = prev->limits; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
460 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
461 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
462 ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
463 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
464 return NGX_CONF_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
465 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
466 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
467 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
468 static char * |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
469 ngx_stream_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
470 { |
6610
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
471 u_char *p; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
472 ssize_t size; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
473 ngx_str_t *value, name, s; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
474 ngx_uint_t i; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
475 ngx_shm_zone_t *shm_zone; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
476 ngx_stream_limit_conn_ctx_t *ctx; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
477 ngx_stream_compile_complex_value_t ccv; |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
478 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
479 value = cf->args->elts; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
480 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
481 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_limit_conn_ctx_t)); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
482 if (ctx == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
483 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
484 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
485 |
6610
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
486 ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t)); |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
487 |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
488 ccv.cf = cf; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
489 ccv.value = &value[1]; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
490 ccv.complex_value = &ctx->key; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
491 |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
492 if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) { |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
493 return NGX_CONF_ERROR; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
494 } |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
495 |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
496 size = 0; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
497 name.len = 0; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
498 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
499 for (i = 2; i < cf->args->nelts; i++) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
500 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
501 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
502 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
503 name.data = value[i].data + 5; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
504 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
505 p = (u_char *) ngx_strchr(name.data, ':'); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
506 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
507 if (p == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
508 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
509 "invalid zone size \"%V\"", &value[i]); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
510 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
511 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
512 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
513 name.len = p - name.data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
514 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
515 s.data = p + 1; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
516 s.len = value[i].data + value[i].len - s.data; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
517 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
518 size = ngx_parse_size(&s); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
519 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
520 if (size == NGX_ERROR) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
521 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
522 "invalid zone size \"%V\"", &value[i]); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
523 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
524 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
525 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
526 if (size < (ssize_t) (8 * ngx_pagesize)) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
527 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
528 "zone \"%V\" is too small", &value[i]); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
529 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
530 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
531 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
532 continue; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
533 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
534 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
535 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
536 "invalid parameter \"%V\"", &value[i]); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
537 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
538 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
539 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
540 if (name.len == 0) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
541 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
542 "\"%V\" must have \"zone\" parameter", |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
543 &cmd->name); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
544 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
545 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
546 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
547 shm_zone = ngx_shared_memory_add(cf, &name, size, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
548 &ngx_stream_limit_conn_module); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
549 if (shm_zone == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
550 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
551 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
552 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
553 if (shm_zone->data) { |
6610
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
554 ctx = shm_zone->data; |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
555 |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
556 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
6610
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
557 "%V \"%V\" is already bound to key \"%V\"", |
d5b5866c06c4
Stream: got rid of pseudo variables.
Vladimir Homutov <vl@nginx.com>
parents:
6606
diff
changeset
|
558 &cmd->name, &name, &ctx->key.value); |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
559 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
560 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
561 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
562 shm_zone->init = ngx_stream_limit_conn_init_zone; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
563 shm_zone->data = ctx; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
564 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
565 return NGX_CONF_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
566 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
567 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
568 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
569 static char * |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
570 ngx_stream_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
571 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
572 ngx_shm_zone_t *shm_zone; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
573 ngx_stream_limit_conn_conf_t *lccf = conf; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
574 ngx_stream_limit_conn_limit_t *limit, *limits; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
575 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
576 ngx_str_t *value; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
577 ngx_int_t n; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
578 ngx_uint_t i; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
579 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
580 value = cf->args->elts; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
581 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
582 shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
583 &ngx_stream_limit_conn_module); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
584 if (shm_zone == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
585 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
586 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
587 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
588 limits = lccf->limits.elts; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
589 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
590 if (limits == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
591 if (ngx_array_init(&lccf->limits, cf->pool, 1, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
592 sizeof(ngx_stream_limit_conn_limit_t)) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
593 != NGX_OK) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
594 { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
595 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
596 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
597 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
598 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
599 for (i = 0; i < lccf->limits.nelts; i++) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
600 if (shm_zone == limits[i].shm_zone) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
601 return "is duplicate"; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
602 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
603 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
604 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
605 n = ngx_atoi(value[2].data, value[2].len); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
606 if (n <= 0) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
607 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
608 "invalid number of connections \"%V\"", &value[2]); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
609 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
610 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
611 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
612 if (n > 65535) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
613 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
614 "connection limit must be less 65536"); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
615 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
616 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
617 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
618 limit = ngx_array_push(&lccf->limits); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
619 if (limit == NULL) { |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
620 return NGX_CONF_ERROR; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
621 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
622 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
623 limit->conn = n; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
624 limit->shm_zone = shm_zone; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
625 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
626 return NGX_CONF_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
627 } |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
628 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
629 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
630 static ngx_int_t |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
631 ngx_stream_limit_conn_init(ngx_conf_t *cf) |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
632 { |
6693 | 633 ngx_stream_handler_pt *h; |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
634 ngx_stream_core_main_conf_t *cmcf; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
635 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
636 cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module); |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
637 |
6693 | 638 h = ngx_array_push(&cmcf->phases[NGX_STREAM_PREACCESS_PHASE].handlers); |
639 if (h == NULL) { | |
640 return NGX_ERROR; | |
641 } | |
642 | |
643 *h = ngx_stream_limit_conn_handler; | |
6197
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
644 |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
645 return NGX_OK; |
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
646 } |