-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Prashant Batra writes: > Hi all,
> I am having a query. > I understand that whenever a packet comes at an interface (lets say > ethernet) , the driver for that interface handles the packet to kernel. > Kernel works on the packet. To be specific, IP stack in the kernel works on > the packet and does the necessary things. Then it gives the packet to the > registered application ( user ). > Now I want the packet from the kernel directly, without it going through the > IP stack. > Now, I can do the similar things using libpcap, but what I want is to bring > the packet directly from the kernel space to user space. ( that is kernel > writes the packet in a memory location and gives the address of that to the > user application. As I understand, you're looking for some kind of shared memory between kernel-space and user-space, which AFAIK doesn't exist. You need to use read(2)/write(2) to pass the memory address and length to copy data from/to kernel-space. You can use poll/select/epoll to check the availability of data/readiness on the socket. libpcap is the high-level library utilizing raw sockets, you can use raw sockets directly also without relying on libpcap. > Is this possible? And if how. You probably have to invent such interface of your own. Ashish - -- Sent via Gnus from GNU Emacs They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. -- Benjamin Franklin, Memoirs of the life and writings of Benjamin Franklin -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iQIcBAEBCgAGBQJMAxYuAAoJEMdGz6nnT6Sw3p4QAJsDoFO2cwPSUn9ZVK+es7wx rAG9lSo1HK+7jeODDM2EHe4e1azdT/NCfFr+ofRZdhsWB7YaTHM1KEhX+7zZS1Yf XC1+Uq/8NJ5uyE9P8yupsY/pRlrfd/cRGythtDwLuEPjWu3vS0Z3pqE3lsJDXLI6 iPLCdpOqZdWpGwES8r0Sbo1TOU9gjQvjUsCCPRhdzWO/cZ3K3ra3RSs1ij31RkDJ UFXzC2ikt4qSRhHt0BuLpdp4xzA3sHQC0mXY3hv9gfVLRJnrsX2011InMcxTol3J xihF1AewUDoC7EI3DJmQHajo1Ofzdn9FWd8UYH8N/VE9zns2jWtPI/sCMNhZlWH1 8tFpm7yU3278t3g3tV6H+eHFNhbEf0aXy7IxCVJw/4sCSUkMpuZV2stVy+nSAWax KowWjrFU9j4zj0SVGY/lG+imDIIzo/n8j0aWZmPbVy1tU707XbrBpGrGgZFbKi2U IMjse62ITG0IhyUWsTMf9jNUmlbOE7B6XXl7UDueaSVwUaHPNpDatTi+/yejoRfD FvZ/lUsa5bh3SVkx9oWUBUSlVlyt43NK04mGgmNkPqa4z5iAmziF64X5Y5Wn4qCO h0NiC+fwql2RBc7WNvjiKet+dhjQL9fAOqSp5EW6BVOlHpdReEQuMBf9NbBTqbQO RCzw//Fuwv1C9ml2cSnf =fZOw -----END PGP SIGNATURE----- _______________________________________________ Ilugd mailing list Ilugd@lists.linux-delhi.org http://frodo.hserus.net/mailman/listinfo/ilugd
