diff options
| -rw-r--r-- | lib/multi.c | 6 | ||||
| -rw-r--r-- | lib/multihandle.h | 4 | ||||
| -rw-r--r-- | lib/setopt.c | 5 | ||||
| -rw-r--r-- | lib/share.c | 9 | ||||
| -rw-r--r-- | lib/share.h | 6 | ||||
| -rw-r--r-- | lib/urldata.h | 5 |
6 files changed, 24 insertions, 11 deletions
diff --git a/lib/multi.c b/lib/multi.c index 57c2ae8c0..d8de7e8e3 100644 --- a/lib/multi.c +++ b/lib/multi.c @@ -69,7 +69,7 @@ #define CURL_MULTI_HANDLE 0x000bab1e #define GOOD_MULTI_HANDLE(x) \ - ((x) && (x)->type == CURL_MULTI_HANDLE) + ((x) && (x)->magic == CURL_MULTI_HANDLE) static CURLMcode singlesocket(struct Curl_multi *multi, struct Curl_easy *data); @@ -360,7 +360,7 @@ struct Curl_multi *Curl_multi_handle(int hashsize, /* socket hash */ if(!multi) return NULL; - multi->type = CURL_MULTI_HANDLE; + multi->magic = CURL_MULTI_HANDLE; if(Curl_mk_dnscache(&multi->hostcache)) goto error; @@ -2453,7 +2453,7 @@ CURLMcode curl_multi_cleanup(struct Curl_multi *multi) if(multi->in_callback) return CURLM_RECURSIVE_API_CALL; - multi->type = 0; /* not good anymore */ + multi->magic = 0; /* not good anymore */ /* Firsrt remove all remaining easy handles */ data = multi->easyp; diff --git a/lib/multihandle.h b/lib/multihandle.h index aa9ca4bcd..f28c5899b 100644 --- a/lib/multihandle.h +++ b/lib/multihandle.h @@ -7,7 +7,7 @@ * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * - * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -83,7 +83,7 @@ typedef enum { struct Curl_multi { /* First a simple identifier to easier detect if a user mix up this multi handle with an easy handle. Set this to CURL_MULTI_HANDLE. */ - long type; + unsigned int magic; /* We have a doubly-linked list with easy handles */ struct Curl_easy *easyp; diff --git a/lib/setopt.c b/lib/setopt.c index 731ffeb36..409234fcd 100644 --- a/lib/setopt.c +++ b/lib/setopt.c @@ -2169,8 +2169,9 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param) data->share = NULL; } - /* use new share if it set */ - data->share = set; + if(GOOD_SHARE_HANDLE(set)) + /* use new share if it set */ + data->share = set; if(data->share) { Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE); diff --git a/lib/share.c b/lib/share.c index 5ce983033..4f1804dbd 100644 --- a/lib/share.c +++ b/lib/share.c @@ -5,7 +5,7 @@ * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * - * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -37,6 +37,7 @@ curl_share_init(void) { struct Curl_share *share = calloc(1, sizeof(struct Curl_share)); if(share) { + share->magic = CURL_GOOD_SHARE; share->specifier |= (1<<CURL_LOCK_DATA_SHARE); if(Curl_mk_dnscache(&share->hostcache)) { @@ -59,6 +60,9 @@ curl_share_setopt(struct Curl_share *share, CURLSHoption option, ...) void *ptr; CURLSHcode res = CURLSHE_OK; + if(!GOOD_SHARE_HANDLE(share)) + return CURLSHE_INVALID; + if(share->dirty) /* don't allow setting options while one or more handles are already using this share */ @@ -184,7 +188,7 @@ curl_share_setopt(struct Curl_share *share, CURLSHoption option, ...) CURLSHcode curl_share_cleanup(struct Curl_share *share) { - if(share == NULL) + if(!GOOD_SHARE_HANDLE(share)) return CURLSHE_INVALID; if(share->lockfunc) @@ -218,6 +222,7 @@ curl_share_cleanup(struct Curl_share *share) if(share->unlockfunc) share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata); + share->magic = 0; free(share); return CURLSHE_OK; diff --git a/lib/share.h b/lib/share.h index 01aa9cda5..222e34ba6 100644 --- a/lib/share.h +++ b/lib/share.h @@ -7,7 +7,7 @@ * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * - * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -37,8 +37,12 @@ #define CURL_VOLATILE volatile #endif +#define CURL_GOOD_SHARE 0x7e117a1e +#define GOOD_SHARE_HANDLE(x) ((x) && (x)->magic == CURL_GOOD_SHARE) + /* this struct is libcurl-private, don't export details */ struct Curl_share { + unsigned int magic; /* CURL_GOOD_SHARE */ unsigned int specifier; CURL_VOLATILE unsigned int dirty; diff --git a/lib/urldata.h b/lib/urldata.h index 072caf002..1aa585077 100644 --- a/lib/urldata.h +++ b/lib/urldata.h @@ -1884,6 +1884,10 @@ struct Names { */ struct Curl_easy { + /* First a simple identifier to easier detect if a user mix up this easy + handle with a multi handle. Set this to CURLEASY_MAGIC_NUMBER */ + unsigned int magic; + /* first, two fields for the linked list of these */ struct Curl_easy *next; struct Curl_easy *prev; @@ -1947,7 +1951,6 @@ struct Curl_easy { #ifdef USE_HYPER struct hyptransfer hyp; #endif - unsigned int magic; /* set to a CURLEASY_MAGIC_NUMBER */ }; #define LIBCURL_NAME "libcurl" |