Mercurial > hg > nginx
annotate src/os/win32/ngx_wsarecv_chain.c @ 6791:cb4a4e9bba8e
Perl: fixed optimization in SSI command handler.
As the pointer to the first argument was tested instead of the argument
itself, array of arguments was always created, even if there were no
arguments. Fix is to test args[0] instead of args.
Found by Coverity (CID 1356862).
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 01 Nov 2016 20:39:21 +0300 |
parents | ec81934727a1 |
children | efd71d49bde0 |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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12 |
577 | 13 #define NGX_WSABUFS 8 |
501 | 14 |
15 | |
16 ssize_t | |
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17 ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain, off_t limit) |
186
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18 { |
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19 int rc; |
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20 u_char *prev; |
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21 u_long bytes, flags; |
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22 size_t n, size; |
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23 ngx_err_t err; |
501 | 24 ngx_array_t vec; |
186
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25 ngx_event_t *rev; |
501 | 26 LPWSABUF wsabuf; |
27 WSABUF wsabufs[NGX_WSABUFS]; | |
186
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28 |
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29 prev = NULL; |
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30 wsabuf = NULL; |
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31 flags = 0; |
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32 size = 0; |
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33 bytes = 0; |
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34 |
501 | 35 vec.elts = wsabufs; |
36 vec.nelts = 0; | |
37 vec.size = sizeof(WSABUF); | |
577 | 38 vec.nalloc = NGX_WSABUFS; |
501 | 39 vec.pool = c->pool; |
186
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40 |
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41 /* coalesce the neighbouring bufs */ |
186
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42 |
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43 while (chain) { |
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44 n = chain->buf->end - chain->buf->last; |
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45 |
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46 if (limit) { |
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47 if (size >= (size_t) limit) { |
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48 break; |
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49 } |
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50 |
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51 if (size + n > (size_t) limit) { |
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52 n = (size_t) limit - size; |
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53 } |
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54 } |
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55 |
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56 if (prev == chain->buf->last) { |
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57 wsabuf->len += n; |
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58 |
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59 } else { |
501 | 60 wsabuf = ngx_array_push(&vec); |
61 if (wsabuf == NULL) { | |
62 return NGX_ERROR; | |
63 } | |
64 | |
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65 wsabuf->buf = (char *) chain->buf->last; |
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66 wsabuf->len = n; |
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67 } |
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68 |
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69 size += n; |
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70 prev = chain->buf->end; |
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71 chain = chain->next; |
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72 } |
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73 |
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74 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
501 | 75 "WSARecv: %d:%d", vec.nelts, wsabuf->len); |
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76 |
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77 |
501 | 78 rc = WSARecv(c->fd, vec.elts, vec.nelts, &bytes, &flags, NULL, NULL); |
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79 |
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80 rev = c->read; |
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81 |
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82 if (rc == -1) { |
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83 rev->ready = 0; |
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84 err = ngx_socket_errno; |
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85 |
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86 if (err == WSAEWOULDBLOCK) { |
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87 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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88 "WSARecv() not ready"); |
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89 return NGX_AGAIN; |
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90 } |
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91 |
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92 rev->error = 1; |
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93 ngx_connection_error(c, err, "WSARecv() failed"); |
186
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94 return NGX_ERROR; |
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95 } |
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96 |
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97 if (bytes < size) { |
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98 rev->ready = 0; |
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99 } |
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100 |
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101 if (bytes == 0) { |
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102 rev->eof = 1; |
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103 } |
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104 |
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105 return bytes; |
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106 } |