Hi, I am using http://download.savannah.gnu.org/releases-noredirect/lwip/lwip-1.3.1.zip
md5 af8c4bf938e3ca48af3d54e29d57ab54 *ip.c 1a1ec514a862fb1d931f4eb4c236cb21 *pbuf.c Martin 2009/9/1 Simon Goldschmidt <[email protected]>: > Which version of lwIP are you using? This was a bug in 1.3.0 that has been > fixed in 1.3.1, if I remember correctly. Try upgrading to the latest version > to fix this. > > Simon > > > -------- Original-Nachricht -------- >> Datum: Tue, 1 Sep 2009 09:44:09 +0200 >> Von: Martin Velek <[email protected]> >> An: [email protected] >> Betreff: [lwip-users] pbuf_realloc in ip.c problem > >> Hello, >> >> I am using lwip 1.3.1 with FreeRTOS and LM3S9B92. Because there is a >> memory manager in the OS I have defined >> #define MEM_LIBC_MALLOC 1 >> #define MEMP_MEM_MALLOC 1 >> #define MEM_USE_POOLS 0 >> with bget implementation of memory manager. All incomming packets are >> PBUF_RAM. >> >> The lwip running fine until a tcp packet to port 80 is received(http >> server by netconn). The lwip will cause a invalid memory access. >> >> During debuging I have discovered that in file ip.c is called >> pbuf_realloc(p, iphdr_len) and inside this function is called >> mem_realloc(brel). Unfortunately bget reallocate memory by creating a >> new space and than will free the old memory. >> However this new memory is "lost" because the new pointer is not >> stored. (q = mem_realloc(q, (u8_t *)q->payload - (u8_t *)q + >> rem_len);) and q is not stored back to "p". >> So, p is still pointing to the deallocated memory. >> I have thought that the bget implementation is wrong but the standard >> C's realloc returns: >> "A pointer to the reallocated memory block, which may be either the >> same as the ptr argument or a new location. >> The type of this pointer is void*, which can be cast to the desired >> type of data pointer in order to be dereferenceable. >> If the function failed to allocate the requested block of memory, a >> NULL pointer is returned." >> >> Have anyone next similar problem? >> >> Thank you for your reply. >> >> Regards, >> Martin Velek >> >> >> _______________________________________________ >> lwip-users mailing list >> [email protected] >> http://lists.nongnu.org/mailman/listinfo/lwip-users > > -- > Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3 - > sicherer, schneller und einfacher! http://portal.gmx.net/de/go/chbrowser > > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
