/* * netsniff-ng - the packet sniffing beast * Subject to the GPL, version 2. */ #include #include #include "die.h" #include "csum.h" #include "built_in.h" #include "trafgen_l3.h" #include "trafgen_l4.h" #include "trafgen_conf.h" #include "trafgen_proto.h" static struct proto_field udp_fields[] = { { .id = UDP_SPORT, .len = 2, .offset = 0 }, { .id = UDP_DPORT, .len = 2, .offset = 2 }, { .id = UDP_LEN, .len = 2, .offset = 4 }, { .id = UDP_CSUM, .len = 2, .offset = 6 }, }; static struct proto_field tcp_fields[] = { { .id = TCP_SPORT, .len = 2, .offset = 0 }, { .id = TCP_DPORT, .len = 2, .offset = 2 }, { .id = TCP_SEQ, .len = 4, .offset = 4 }, { .id = TCP_ACK_SEQ, .len = 4, .offset = 8 }, { .id = TCP_DOFF, .len = 2, .offset = 12, .shift = 12, .mask = 0xf000 }, /* reserved (4 bits) */ { .id = TCP_CWR, .len = 2, .offset = 12, .shift = 7, .mask = 0x0080 }, { .id = TCP_ECE, .len = 2, .offset = 12, .shift = 6, .mask = 0x0040 }, { .id = TCP_URG, .len = 2, .offset = 12, .shift = 5, .mask = 0x0020 }, { .id = TCP_ACK, .len = 2, .offset = 12, .shift = 4, .mask = 0x0010 }, { .id = TCP_PSH, .len = 2, .offset = 12, .shift = 3, .mask = 0x0008 }, { .id = TCP_RST, .len = 2, .offset = 12, .shift = 2, .mask = 0x0004 }, { .id = TCP_SYN, .len = 2, .offset = 12, .shift = 1, .mask = 0x0002 }, { .id = TCP_FIN, .len = 2, .offset = 12, .shift = 0, .mask = 0x0001 }, { .id = TCP_WINDOW, .len = 2, .offset = 14 }, { .id = TCP_CSUM, .len = 2, .offset = 16 }, { .id = TCP_URG_PTR, .len = 2, .offset = 18 }, }; static void udp_header_init(struct proto_hdr *hdr) { proto_lower_default_add(hdr, PROTO_IP4); proto_header_fields_add(hdr, udp_fields, array_size(udp_fields)); } static void udp_packet_finish(struct proto_hdr *hdr) { struct proto_hdr *lower = proto_lower_header(hdr); struct packet *pkt = current_packet(); uint16_t total_len; uint16_t csum; total_len = pkt->len - hdr->pkt_offset; proto_field_set_default_be16(hdr, UDP_LEN, total_len); if (proto_field_is_set(hdr, UDP_CSUM)) return; if (!lower || lower->id != PROTO_IP4) return; total_len = proto_field_get_u16(hdr, UDP_LEN); csum = p4_csum((void *) proto_header_ptr(lower), proto_header_ptr(hdr), total_len, IPPROTO_UDP); proto_field_set_be16(hdr, UDP_CSUM, bswap_16(csum)); } static struct proto_hdr udp_hdr = { .id = PROTO_UDP, .layer = PROTO_L4, .header_init = udp_header_init, .packet_finish = udp_packet_finish, }; static void tcp_header_init(struct proto_hdr *hdr) { proto_lower_default_add(hdr, PROTO_IP4); proto_header_fields_add(hdr, tcp_fields, array_size(tcp_fields)); proto_field_set_default_be16(hdr, TCP_DOFF, 5); } static void tcp_packet_finish(struct proto_hdr *hdr) { struct proto_hdr *lower = proto_lower_header(hdr); struct packet *pkt = current_packet(); uint16_t total_len; uint16_t csum; if (proto_field_is_set(hdr, TCP_CSUM)) return; if (!lower || lower->id != PROTO_IP4) return; total_len = pkt->len - hdr->pkt_offset; csum = p4_csum((void *) proto_header_ptr(lower), proto_header_ptr(hdr), total_len, IPPROTO_TCP); proto_field_set_be16(hdr, TCP_CSUM, bswap_16(csum)); } static struct proto_hdr tcp_hdr = { .id = PROTO_TCP, .layer = PROTO_L4, .header_init = tcp_header_init, .packet_finish = tcp_packet_finish, }; void protos_l4_init(void) { proto_header_register(&udp_hdr); proto_header_register(&tcp_hdr); } value='25'>25space:mode:
authorVivien Didelot <vivien.didelot@savoirfairelinux.com>2017-02-03 13:20:17 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-06 16:53:28 -0500
commit8e92ab3a426e04dc355b196e3b4474f633025a3b (patch)
tree015463fe11e09ddeb31ffcf7b2a08550fef29814
parent88e4f0ca4e4e7760e4aad544789c5408219886d5 (diff)
net: dsa: simplify netdevice events handling
Simplify the code handling the slave netdevice notifier call by providing a dsa_slave_changeupper helper for NETDEV_CHANGEUPPER, and so on (only this event is supported at the moment.) Return NOTIFY_DONE when we did not care about an event, and NOTIFY_OK when we were concerned but no error occurred, as the API suggests. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat
-rw-r--r--net/dsa/slave.c44
1 files changed, 16 insertions, 28 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c