/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include /* for ntohs() */ #include "proto.h" #include "protos.h" #include "dissector_eth.h" #include "pkt_buff.h" #include "built_in.h" struct arphdr { uint16_t ar_hrd; /* format of hardware address */ uint16_t ar_pro; /* format of protocol address */ uint8_t ar_hln; /* length of hardware address */ uint8_t ar_pln; /* length of protocol address */ uint16_t ar_op; /* ARP opcode (command) */ uint8_t ar_sha[6]; /* sender hardware address */ uint8_t ar_sip[4]; /* sender IP address */ uint8_t ar_tha[6]; /* target hardware address */ uint8_t ar_tip[4]; /* target IP address */ } __packed; #define ARPHRD_ETHER 1 #define ARPHRD_IEEE802 6 #define ARPHRD_ARCNET 7 #define ARPHRD_ATM 16 #define ARPHRD_ATM2 19 #define ARPHRD_SERIAL 20 #define ARPHRD_ATM3 21 #define ARPHRD_IEEE1394 24 #define ARPOP_REQUEST 1 /* ARP request */ #define ARPOP_REPLY 2 /* ARP reply */ #define ARPOP_RREQUEST 3 /* RARP request */ #define ARPOP_RREPLY 4 /* RARP reply */ #define ARPOP_InREQUEST 8 /* InARP request */ #define ARPOP_InREPLY 9 /* InARP reply */ #define ARPOP_NAK 10 /* (ATM)ARP NAK */ static void arp(struct pkt_buff *pkt) { char *hrd; char *pro; char *opcode; struct arphdr *arp = (struct arphdr *) pkt_pull(pkt, sizeof(*arp)); if (arp == NULL) return; switch (ntohs(arp->ar_hrd)) { case ARPHRD_ETHER: hrd = "Ethernet"; break; case ARPHRD_IEEE802: hrd = "IEEE 802"; break; case ARPHRD_ARCNET: hrd = "ARCNET"; break; case ARPHRD_ATM: case ARPHRD_ATM2: case ARPHRD_ATM3: hrd = "ATM"; break; case ARPHRD_SERIAL: hrd = "Serial Line"; break; case ARPHRD_IEEE1394: hrd = "IEEE 1394.1995"; break; default: hrd = "Unknown"; break; } pro = lookup_ether_type(ntohs(arp->ar_pro)); if (pro == NULL) pro = "Unknown"; switch (ntohs(arp->ar_op)) { case ARPOP_REQUEST: opcode = "ARP request"; break; case ARPOP_REPLY: opcode = "ARP reply"; break; case ARPOP_RREQUEST: opcode = "RARP request"; break; case ARPOP_RREPLY: opcode = "RARP reply"; break; case ARPOP_InREQUEST: opcode = "InARP request"; break; case ARPOP_InREPLY: opcode = "InARP reply"; break; case ARPOP_NAK: opcode = "(ATM) ARP NAK"; break; default: opcode = "Unknown"; break; }; tprintf(" [ ARP "); tprintf("Format HA (%u => %s), ", ntohs(arp->ar_hrd), hrd); tprintf("Format Proto (0x%.4x => %s), ", ntohs(arp->ar_pro), pro); tprintf("HA Len (%u), ", arp->ar_hln); tprintf("Proto Len (%u), ", arp->ar_pln); tprintf("Opcode (%u => %s)", ntohs(arp->ar_op), opcode); tprintf(" ]\n"); } static void arp_less(struct pkt_buff *pkt) { char *opcode = NULL; struct arphdr *arp = (struct arphdr *) pkt_pull(pkt, sizeof(*arp)); if (arp == NULL) return; switch (ntohs(arp->ar_op)) { case ARPOP_REQUEST: opcode = "ARP request"; break; case ARPOP_REPLY: opcode = "ARP reply"; break; case ARPOP_RREQUEST: opcode = "RARP request"; break; case ARPOP_RREPLY: opcode = "RARP reply"; break; case ARPOP_InREQUEST: opcode = "InARP request"; break; case ARPOP_InREPLY: opcode = "InARP reply"; break; case ARPOP_NAK: opcode = "(ATM) ARP NAK"; break; default: opcode = "Unknown"; break; }; tprintf(" Op %s", opcode); } struct protocol arp_ops = { .key = 0x0806, .print_full = arp, .print_less = arp_less, }; >context:space:mode:
authorVineet Gupta <vgupta@synopsys.com>2016-10-20 07:39:45 -0700
committerVineet Gupta <vgupta@synopsys.com>2016-10-24 09:24:26 -0700
commit91e040a79df73d371f70792f30380d4e44805250 (patch)
treeb2732eadb60fc5575c465a81cc637a899330c1b5 /Documentation/devicetree
parent1dec78585328db00e33fb18dc1a6deed0e2095a5 (diff)
ARC: syscall for userspace cmpxchg assist
Older ARC700 cores (ARC750 specifically) lack instructions to implement atomic r-w-w. This is problematic for userspace libraries such as NPTL which need atomic primitives. So enable them by providing kernel assist. This is costly but really the only sane soluton (othern than tight spinning using the otherwise availiable atomic exchange EX instruciton). Good thing is there are only a few of these cores running Linux out in the wild. This only works on UP systems. Reviewed-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'Documentation/devicetree')