Mercurial > hg > nginx
annotate src/os/win32/ngx_wsasend_chain.c @ 7690:8253424d1aff
Added size check to ngx_http_alloc_large_header_buffer().
This ensures that copying won't write more than the buffer size
even if the buffer comes from hc->free and it is smaller than the large
client header buffer size in the virtual host configuration. This might
happen if size of large client header buffers is different in name-based
virtual hosts, similarly to the problem with number of buffers fixed
in 6926:e662cbf1b932.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 06 Aug 2020 05:02:22 +0300 |
| parents | 2cd019520210 |
| children | ecf2a9002b37 |
| rev | line source |
|---|---|
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
| 4412 | 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_event.h> |
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11 |
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12 |
| 461 | 13 #define NGX_WSABUFS 8 |
| 14 | |
| 15 | |
| 501 | 16 ngx_chain_t * |
| 17 ngx_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
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18 { |
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19 int rc; |
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20 u_char *prev; |
| 473 | 21 u_long size, sent, send, prev_send; |
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22 ngx_err_t err; |
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23 ngx_event_t *wev; |
| 461 | 24 ngx_array_t vec; |
| 501 | 25 ngx_chain_t *cl; |
| 461 | 26 LPWSABUF wsabuf; |
| 27 WSABUF wsabufs[NGX_WSABUFS]; | |
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28 |
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29 wev = c->write; |
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30 |
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31 if (!wev->ready) { |
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32 return in; |
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33 } |
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34 |
| 473 | 35 /* the maximum limit size is the maximum u_long value - the page size */ |
| 36 | |
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37 if (limit == 0 || limit > (off_t) (NGX_MAX_UINT32_VALUE - ngx_pagesize)) { |
| 473 | 38 limit = NGX_MAX_UINT32_VALUE - ngx_pagesize; |
| 39 } | |
| 40 | |
| 461 | 41 send = 0; |
| 42 | |
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43 /* |
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44 * WSABUFs must be 4-byte aligned otherwise |
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45 * WSASend() will return undocumented WSAEINVAL error. |
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46 */ |
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47 |
| 461 | 48 vec.elts = wsabufs; |
| 49 vec.size = sizeof(WSABUF); | |
| 577 | 50 vec.nalloc = NGX_WSABUFS; |
| 461 | 51 vec.pool = c->pool; |
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52 |
| 461 | 53 for ( ;; ) { |
| 54 prev = NULL; | |
| 55 wsabuf = NULL; | |
| 473 | 56 prev_send = send; |
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57 |
| 461 | 58 vec.nelts = 0; |
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59 |
| 461 | 60 /* create the WSABUF and coalesce the neighbouring bufs */ |
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61 |
| 461 | 62 for (cl = in; |
| 63 cl && vec.nelts < ngx_max_wsabufs && send < limit; | |
| 64 cl = cl->next) | |
| 65 { | |
| 66 if (ngx_buf_special(cl->buf)) { | |
| 67 continue; | |
| 68 } | |
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69 |
| 461 | 70 size = cl->buf->last - cl->buf->pos; |
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71 |
| 461 | 72 if (send + size > limit) { |
| 73 size = (u_long) (limit - send); | |
| 74 } | |
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75 |
| 461 | 76 if (prev == cl->buf->pos) { |
| 77 wsabuf->len += cl->buf->last - cl->buf->pos; | |
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78 |
| 461 | 79 } else { |
| 501 | 80 wsabuf = ngx_array_push(&vec); |
| 81 if (wsabuf == NULL) { | |
| 461 | 82 return NGX_CHAIN_ERROR; |
| 83 } | |
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84 |
| 461 | 85 wsabuf->buf = (char *) cl->buf->pos; |
| 86 wsabuf->len = cl->buf->last - cl->buf->pos; | |
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87 } |
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88 |
| 461 | 89 prev = cl->buf->last; |
| 90 send += size; | |
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91 } |
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92 |
| 461 | 93 sent = 0; |
| 94 | |
| 95 rc = WSASend(c->fd, vec.elts, vec.nelts, &sent, 0, NULL, NULL); | |
| 96 | |
| 97 if (rc == -1) { | |
| 98 err = ngx_errno; | |
| 99 | |
| 100 if (err == WSAEWOULDBLOCK) { | |
| 101 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, | |
| 102 "WSASend() not ready"); | |
| 103 | |
| 104 } else { | |
| 105 wev->error = 1; | |
| 106 ngx_connection_error(c, err, "WSASend() failed"); | |
| 107 return NGX_CHAIN_ERROR; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
| 112 "WSASend: fd:%d, s:%ul", c->fd, sent); | |
| 113 | |
| 114 c->sent += sent; | |
| 115 | |
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116 in = ngx_chain_update_sent(in, sent); |
| 461 | 117 |
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118 if (send - prev_send != sent) { |
| 461 | 119 wev->ready = 0; |
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120 return in; |
| 461 | 121 } |
| 122 | |
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123 if (send >= limit || in == NULL) { |
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124 return in; |
| 461 | 125 } |
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126 } |
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127 } |
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128 |
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129 |
| 501 | 130 ngx_chain_t * |
| 131 ngx_overlapped_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
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132 { |
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133 int rc; |
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134 u_char *prev; |
| 473 | 135 u_long size, send, sent; |
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136 ngx_err_t err; |
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137 ngx_event_t *wev; |
| 461 | 138 ngx_array_t vec; |
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139 ngx_chain_t *cl; |
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140 LPWSAOVERLAPPED ovlp; |
| 501 | 141 LPWSABUF wsabuf; |
| 461 | 142 WSABUF wsabufs[NGX_WSABUFS]; |
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143 |
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144 wev = c->write; |
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145 |
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146 if (!wev->ready) { |
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147 return in; |
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148 } |
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149 |
| 461 | 150 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
| 151 "wev->complete: %d", wev->complete); | |
| 152 | |
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153 if (!wev->complete) { |
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154 |
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155 /* post the overlapped WSASend() */ |
| 473 | 156 |
| 157 /* the maximum limit size is the maximum u_long value - the page size */ | |
| 158 | |
| 5875 | 159 if (limit == 0 || limit > (off_t) (NGX_MAX_UINT32_VALUE - ngx_pagesize)) |
| 160 { | |
| 473 | 161 limit = NGX_MAX_UINT32_VALUE - ngx_pagesize; |
| 162 } | |
| 577 | 163 |
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164 /* |
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165 * WSABUFs must be 4-byte aligned otherwise |
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166 * WSASend() will return undocumented WSAEINVAL error. |
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167 */ |
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168 |
| 461 | 169 vec.elts = wsabufs; |
| 170 vec.nelts = 0; | |
| 171 vec.size = sizeof(WSABUF); | |
| 577 | 172 vec.nalloc = NGX_WSABUFS; |
| 461 | 173 vec.pool = c->pool; |
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174 |
| 461 | 175 send = 0; |
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176 prev = NULL; |
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177 wsabuf = NULL; |
| 577 | 178 |
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179 /* create the WSABUF and coalesce the neighbouring bufs */ |
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180 |
| 461 | 181 for (cl = in; |
| 182 cl && vec.nelts < ngx_max_wsabufs && send < limit; | |
| 183 cl = cl->next) | |
| 184 { | |
| 185 if (ngx_buf_special(cl->buf)) { | |
| 186 continue; | |
| 187 } | |
| 188 | |
| 189 size = cl->buf->last - cl->buf->pos; | |
| 190 | |
| 191 if (send + size > limit) { | |
| 192 size = (u_long) (limit - send); | |
| 193 } | |
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194 |
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195 if (prev == cl->buf->pos) { |
|
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nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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196 wsabuf->len += cl->buf->last - cl->buf->pos; |
| 461 | 197 |
|
184
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198 } else { |
| 501 | 199 wsabuf = ngx_array_push(&vec); |
| 200 if (wsabuf == NULL) { | |
| 461 | 201 return NGX_CHAIN_ERROR; |
| 202 } | |
| 203 | |
|
343
6bdf858bff8c
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204 wsabuf->buf = (char *) cl->buf->pos; |
|
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205 wsabuf->len = cl->buf->last - cl->buf->pos; |
|
184
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206 } |
| 461 | 207 |
| 208 prev = cl->buf->last; | |
| 209 send += size; | |
|
184
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210 } |
|
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parents:
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diff
changeset
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211 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
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212 ovlp = (LPWSAOVERLAPPED) &c->write->ovlp; |
|
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213 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); |
| 577 | 214 |
| 461 | 215 rc = WSASend(c->fd, vec.elts, vec.nelts, &sent, 0, ovlp, NULL); |
|
184
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parents:
144
diff
changeset
|
216 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
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changeset
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217 wev->complete = 0; |
|
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parents:
144
diff
changeset
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218 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
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219 if (rc == -1) { |
|
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220 err = ngx_errno; |
|
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parents:
144
diff
changeset
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221 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
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222 if (err == WSA_IO_PENDING) { |
| 461 | 223 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
| 224 "WSASend() posted"); | |
|
184
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parents:
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225 wev->active = 1; |
|
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226 return in; |
|
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parents:
144
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changeset
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227 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
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228 } else { |
|
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parents:
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229 wev->error = 1; |
|
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
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parents:
257
diff
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230 ngx_connection_error(c, err, "WSASend() failed"); |
|
184
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231 return NGX_CHAIN_ERROR; |
|
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parents:
144
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232 } |
| 577 | 233 |
|
184
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parents:
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234 } else if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
|
1bf718ce0dde
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parents:
144
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235 |
| 6474 | 236 /* |
| 237 * if a socket was bound with I/O completion port then | |
| 238 * GetQueuedCompletionStatus() would anyway return its status | |
| 239 * despite that WSASend() was already complete | |
| 240 */ | |
|
184
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nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
241 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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|
242 wev->active = 1; |
|
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parents:
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243 return in; |
|
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nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
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244 } |
|
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parents:
144
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|
245 |
| 461 | 246 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
| 247 "WSASend: fd:%d, s:%ul", c->fd, sent); | |
| 248 | |
|
184
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parents:
144
diff
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249 } else { |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
250 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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251 /* the overlapped WSASend() complete */ |
|
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nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
252 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
253 wev->complete = 0; |
|
1bf718ce0dde
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Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
254 wev->active = 0; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
255 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
256 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
257 if (wev->ovlp.error) { |
|
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
257
diff
changeset
|
258 ngx_connection_error(c, wev->ovlp.error, "WSASend() failed"); |
|
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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|
259 return NGX_CHAIN_ERROR; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
260 } |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
261 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
262 sent = wev->available; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
263 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
264 } else { |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
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|
265 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp, |
| 2776 | 266 &sent, 0, NULL) |
| 267 == 0) | |
| 268 { | |
|
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
257
diff
changeset
|
269 ngx_connection_error(c, ngx_socket_errno, |
|
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
257
diff
changeset
|
270 "WSASend() or WSAGetOverlappedResult() failed"); |
| 577 | 271 |
|
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
272 return NGX_CHAIN_ERROR; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
273 } |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
274 } |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
275 } |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
276 |
| 461 | 277 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
| 278 "WSASend ovlp: fd:%d, s:%ul", c->fd, sent); | |
|
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
279 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
280 c->sent += sent; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
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parents:
144
diff
changeset
|
281 |
|
5912
de68ed551bfb
Renamed ngx_handle_sent_chain() to ngx_chain_update_sent().
Valentin Bartenev <vbart@nginx.com>
parents:
5875
diff
changeset
|
282 in = ngx_chain_update_sent(in, sent); |
|
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
283 |
|
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
|
284 if (in) { |
|
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
285 wev->ready = 0; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
286 |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
287 } else { |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
288 wev->ready = 1; |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
289 } |
|
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
290 |
|
5853
a6e83ac70af9
Reduced difference between the send chain functions.
Valentin Bartenev <vbart@nginx.com>
parents:
5851
diff
changeset
|
291 return in; |
|
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
292 } |