/* * netsniff-ng - the packet sniffing beast * Copyright 2012 Markus Amend , Deutsche Flugsicherung GmbH * Subject to the GPL, version 2. * * IPv6 Destination Options Header described in RFC2460 */ #include #include #include /* for ntohs() */ #include "proto.h" #include "dissector_eth.h" #include "built_in.h" #include "pkt_buff.h" struct dest_optshdr { uint8_t h_next_header; uint8_t hdr_len; } __packed; static void dissect_opt_dest(struct pkt_buff *pkt __maybe_unused, ssize_t *opt_len) { /* Have to been upgraded. * http://tools.ietf.org/html/rfc2460#section-4.2 * Look also for proto_ipv6_hop_by_hop.h, it needs * dissect_opt(), too. */ if (*opt_len) tprintf(", Option(s) recognized "); /* If adding dissector reduce opt_len for each using of pkt_pull * to the same size. */ } static void dest_opts(struct pkt_buff *pkt) { uint16_t hdr_ext_len; ssize_t opt_len; struct dest_optshdr *dest_ops; dest_ops = (struct dest_optshdr *) pkt_pull(pkt, sizeof(*dest_ops)); if (dest_ops == NULL) return; /* Total Header Length in Bytes */ hdr_ext_len = (dest_ops->hdr_len + 1) * 8; /* Options length in Bytes */ opt_len = hdr_ext_len - sizeof(*dest_ops); tprintf("\t [ Destination Options "); tprintf("NextHdr (%u), ", dest_ops->h_next_header); if (opt_len > pkt_len(pkt) || opt_len < 0) { tprintf("HdrExtLen (%u, %u Bytes, %s)", dest_ops->hdr_len, hdr_ext_len, colorize_start_full(black, red) "invalid" colorize_end()); return; } tprintf("HdrExtLen (%u, %u Bytes)", dest_ops->hdr_len, hdr_ext_len); dissect_opt_dest(pkt, &opt_len); tprintf(" ]\n"); pkt_pull(pkt, opt_len); pkt_set_dissector(pkt, ð_lay3, dest_ops->h_next_header); } static void dest_opts_less(struct pkt_buff *pkt) { uint16_t hdr_ext_len; ssize_t opt_len; struct dest_optshdr *dest_ops; dest_ops = (struct dest_optshdr *) pkt_pull(pkt, sizeof(*dest_ops)); if (dest_ops == NULL) return; /* Total Header Length in Bytes */ hdr_ext_len = (dest_ops->hdr_len + 1) * 8; /* Options length in Bytes */ opt_len = hdr_ext_len - sizeof(*dest_ops); if (opt_len > pkt_len(pkt) || opt_len < 0) return; tprintf(" Dest Ops"); pkt_pull(pkt, opt_len); pkt_set_dissector(pkt, ð_lay3, dest_ops->h_next_header); } struct protocol ipv6_dest_opts_ops = { .key = 0x3C, .print_full = dest_opts, .print_less = dest_opts_less, }; e'/>
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 19:03:21 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 20:22:18 +0100
commitaaaec6fc755447a1d056765b11b24d8ff2b81366 (patch)
treea7f4167960ee1df86739905b6ccdeb95465bfe5f /net/ipv6/tunnel6.c
parent08d85f3ea99f1eeafc4e8507936190e86a16ee8c (diff)
x86/irq: Make irq activate operations symmetric
The recent commit which prevents double activation of interrupts unearthed interesting code in x86. The code (ab)uses irq_domain_activate_irq() to reconfigure an already activated interrupt. That trips over the prevention code now. Fix it by deactivating the interrupt before activating the new configuration. Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once" Reported-and-tested-by: Mike Galbraith <efault@gmx.de> Reported-and-tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos
Diffstat (limited to 'net/ipv6/tunnel6.c')