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-rw-r--r--extensions/libebt_802_3.c4
-rw-r--r--extensions/libebt_802_3.t2
-rw-r--r--extensions/libebt_arp.c14
-rw-r--r--extensions/libebt_arp.t9
-rw-r--r--extensions/libebt_ip.c16
-rw-r--r--extensions/libebt_ip.t8
-rw-r--r--extensions/libebt_ip6.c14
-rw-r--r--extensions/libebt_ip6.t8
-rw-r--r--extensions/libebt_mark_m.c2
-rw-r--r--extensions/libebt_mark_m.t4
-rw-r--r--extensions/libebt_pkttype.c5
-rw-r--r--extensions/libebt_pkttype.t8
-rw-r--r--extensions/libebt_standard.t4
-rw-r--r--extensions/libebt_stp.c5
-rw-r--r--extensions/libebt_vlan.c13
-rw-r--r--extensions/libebt_vlan.t12
-rw-r--r--iptables/nft-bridge.c4
17 files changed, 81 insertions, 51 deletions
diff --git a/extensions/libebt_802_3.c b/extensions/libebt_802_3.c
index f05d02ea..9e91d052 100644
--- a/extensions/libebt_802_3.c
+++ b/extensions/libebt_802_3.c
@@ -98,15 +98,15 @@ static void br802_3_print(const void *ip, const struct xt_entry_match *match,
struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data;
if (info->bitmask & EBT_802_3_SAP) {
- printf("--802_3-sap ");
if (info->invflags & EBT_802_3_SAP)
printf("! ");
+ printf("--802_3-sap ");
printf("0x%.2x ", info->sap);
}
if (info->bitmask & EBT_802_3_TYPE) {
- printf("--802_3-type ");
if (info->invflags & EBT_802_3_TYPE)
printf("! ");
+ printf("--802_3-type ");
printf("0x%.4x ", ntohs(info->type));
}
}
diff --git a/extensions/libebt_802_3.t b/extensions/libebt_802_3.t
index ddfb2f0a..61081bd6 100644
--- a/extensions/libebt_802_3.t
+++ b/extensions/libebt_802_3.t
@@ -1,3 +1,3 @@
:INPUT,FORWARD,OUTPUT
---802_3-sap ! 0x0a -j CONTINUE;=;OK
+! --802_3-sap 0x0a -j CONTINUE;=;OK
--802_3-type 0x000a -j RETURN;=;OK
diff --git a/extensions/libebt_arp.c b/extensions/libebt_arp.c
index a062b7e7..c1b0ab1d 100644
--- a/extensions/libebt_arp.c
+++ b/extensions/libebt_arp.c
@@ -338,51 +338,51 @@ static void brarp_print(const void *ip, const struct xt_entry_match *match, int
if (arpinfo->bitmask & EBT_ARP_OPCODE) {
int opcode = ntohs(arpinfo->opcode);
- printf("--arp-op ");
if (arpinfo->invflags & EBT_ARP_OPCODE)
printf("! ");
+ printf("--arp-op ");
if (opcode > 0 && opcode <= ARRAY_SIZE(opcodes))
printf("%s ", opcodes[opcode - 1]);
else
printf("%d ", opcode);
}
if (arpinfo->bitmask & EBT_ARP_HTYPE) {
- printf("--arp-htype ");
if (arpinfo->invflags & EBT_ARP_HTYPE)
printf("! ");
+ printf("--arp-htype ");
printf("%d ", ntohs(arpinfo->htype));
}
if (arpinfo->bitmask & EBT_ARP_PTYPE) {
- printf("--arp-ptype ");
if (arpinfo->invflags & EBT_ARP_PTYPE)
printf("! ");
+ printf("--arp-ptype ");
printf("0x%x ", ntohs(arpinfo->ptype));
}
if (arpinfo->bitmask & EBT_ARP_SRC_IP) {
- printf("--arp-ip-src ");
if (arpinfo->invflags & EBT_ARP_SRC_IP)
printf("! ");
+ printf("--arp-ip-src ");
printf("%s%s ", xtables_ipaddr_to_numeric((const struct in_addr*) &arpinfo->saddr),
xtables_ipmask_to_numeric((const struct in_addr*)&arpinfo->smsk));
}
if (arpinfo->bitmask & EBT_ARP_DST_IP) {
- printf("--arp-ip-dst ");
if (arpinfo->invflags & EBT_ARP_DST_IP)
printf("! ");
+ printf("--arp-ip-dst ");
printf("%s%s ", xtables_ipaddr_to_numeric((const struct in_addr*) &arpinfo->daddr),
xtables_ipmask_to_numeric((const struct in_addr*)&arpinfo->dmsk));
}
if (arpinfo->bitmask & EBT_ARP_SRC_MAC) {
- printf("--arp-mac-src ");
if (arpinfo->invflags & EBT_ARP_SRC_MAC)
printf("! ");
+ printf("--arp-mac-src ");
xtables_print_mac_and_mask(arpinfo->smaddr, arpinfo->smmsk);
printf(" ");
}
if (arpinfo->bitmask & EBT_ARP_DST_MAC) {
- printf("--arp-mac-dst ");
if (arpinfo->invflags & EBT_ARP_DST_MAC)
printf("! ");
+ printf("--arp-mac-dst ");
xtables_print_mac_and_mask(arpinfo->dmaddr, arpinfo->dmmsk);
printf(" ");
}
diff --git a/extensions/libebt_arp.t b/extensions/libebt_arp.t
index 2b064c4b..a05ab12d 100644
--- a/extensions/libebt_arp.t
+++ b/extensions/libebt_arp.t
@@ -1,11 +1,12 @@
:INPUT,FORWARD,OUTPUT
-p ARP --arp-op Request;=;OK
--p ARP --arp-htype ! 1;=;OK
+-p ARP ! --arp-htype 1;=;OK
-p ARP --arp-ptype 0x2;=;OK
-p ARP --arp-ip-src 1.2.3.4;=;OK
--p ARP ! --arp-ip-dst 1.2.3.4;-p ARP --arp-ip-dst ! 1.2.3.4 -j CONTINUE;OK
--p ARP --arp-ip-src ! 0.0.0.0;=;OK
--p ARP --arp-ip-dst ! 0.0.0.0/8;=;OK
+-p ARP ! --arp-ip-dst 1.2.3.4;=;OK
+-p ARP ! --arp-ip-src 0.0.0.0;=;OK
+-p ARP ! --arp-ip-dst 0.0.0.0/8;=;OK
-p ARP --arp-mac-src 00:de:ad:be:ef:00;=;OK
-p ARP --arp-mac-dst de:ad:be:ef:00:00/ff:ff:ff:ff:00:00;=;OK
-p ARP --arp-gratuitous;=;OK
+--arp-htype 1;=;FAIL
diff --git a/extensions/libebt_ip.c b/extensions/libebt_ip.c
index acb9bfcd..d48704fe 100644
--- a/extensions/libebt_ip.c
+++ b/extensions/libebt_ip.c
@@ -472,35 +472,35 @@ static void brip_print(const void *ip, const struct xt_entry_match *match,
struct in_addr *addrp, *maskp;
if (info->bitmask & EBT_IP_SOURCE) {
- printf("--ip-src ");
if (info->invflags & EBT_IP_SOURCE)
printf("! ");
+ printf("--ip-src ");
addrp = (struct in_addr *)&info->saddr;
maskp = (struct in_addr *)&info->smsk;
printf("%s%s ", xtables_ipaddr_to_numeric(addrp),
xtables_ipmask_to_numeric(maskp));
}
if (info->bitmask & EBT_IP_DEST) {
- printf("--ip-dst ");
if (info->invflags & EBT_IP_DEST)
printf("! ");
+ printf("--ip-dst ");
addrp = (struct in_addr *)&info->daddr;
maskp = (struct in_addr *)&info->dmsk;
printf("%s%s ", xtables_ipaddr_to_numeric(addrp),
xtables_ipmask_to_numeric(maskp));
}
if (info->bitmask & EBT_IP_TOS) {
- printf("--ip-tos ");
if (info->invflags & EBT_IP_TOS)
printf("! ");
+ printf("--ip-tos ");
printf("0x%02X ", info->tos);
}
if (info->bitmask & EBT_IP_PROTO) {
struct protoent *pe;
- printf("--ip-proto ");
if (info->invflags & EBT_IP_PROTO)
printf("! ");
+ printf("--ip-proto ");
pe = getprotobynumber(info->protocol);
if (pe == NULL) {
printf("%d ", info->protocol);
@@ -509,28 +509,28 @@ static void brip_print(const void *ip, const struct xt_entry_match *match,
}
}
if (info->bitmask & EBT_IP_SPORT) {
- printf("--ip-sport ");
if (info->invflags & EBT_IP_SPORT)
printf("! ");
+ printf("--ip-sport ");
print_port_range(info->sport);
}
if (info->bitmask & EBT_IP_DPORT) {
- printf("--ip-dport ");
if (info->invflags & EBT_IP_DPORT)
printf("! ");
+ printf("--ip-dport ");
print_port_range(info->dport);
}
if (info->bitmask & EBT_IP_ICMP) {
- printf("--ip-icmp-type ");
if (info->invflags & EBT_IP_ICMP)
printf("! ");
+ printf("--ip-icmp-type ");
ebt_print_icmp_type(icmp_codes, ARRAY_SIZE(icmp_codes),
info->icmp_type, info->icmp_code);
}
if (info->bitmask & EBT_IP_IGMP) {
- printf("--ip-igmp-type ");
if (info->invflags & EBT_IP_IGMP)
printf("! ");
+ printf("--ip-igmp-type ");
ebt_print_icmp_type(igmp_types, ARRAY_SIZE(igmp_types),
info->igmp_type, NULL);
}
diff --git a/extensions/libebt_ip.t b/extensions/libebt_ip.t
index 87602367..01a91a73 100644
--- a/extensions/libebt_ip.t
+++ b/extensions/libebt_ip.t
@@ -1,11 +1,13 @@
:INPUT,FORWARD,OUTPUT
--p ip --ip-src ! 192.168.0.0/24 -j ACCEPT;-p IPv4 --ip-src ! 192.168.0.0/24 -j ACCEPT;OK
+-p ip --ip-src ! 192.168.0.0/24 -j ACCEPT;-p IPv4 ! --ip-src 192.168.0.0/24 -j ACCEPT;OK
-p IPv4 --ip-dst 10.0.0.1;=;OK
-p IPv4 --ip-tos 0xFF;=;OK
--p IPv4 --ip-tos ! 0xFF;=;OK
+-p IPv4 ! --ip-tos 0xFF;=;OK
-p IPv4 --ip-proto tcp --ip-dport 22;=;OK
-p IPv4 --ip-proto udp --ip-sport 1024:65535;=;OK
-p IPv4 --ip-proto 253;=;OK
-p IPv4 --ip-proto icmp --ip-icmp-type echo-request;=;OK
-p IPv4 --ip-proto icmp --ip-icmp-type 1/1;=;OK
--p ip --ip-protocol icmp --ip-icmp-type ! 1:10;-p IPv4 --ip-proto icmp --ip-icmp-type ! 1:10/0:255 -j CONTINUE;OK
+-p ip --ip-protocol icmp --ip-icmp-type ! 1:10;-p IPv4 --ip-proto icmp ! --ip-icmp-type 1:10/0:255 -j CONTINUE;OK
+--ip-proto icmp --ip-icmp-type 1/1;=;FAIL
+! -p ip --ip-proto icmp --ip-icmp-type 1/1;=;FAIL
diff --git a/extensions/libebt_ip6.c b/extensions/libebt_ip6.c
index b8a5a5d8..b7277649 100644
--- a/extensions/libebt_ip6.c
+++ b/extensions/libebt_ip6.c
@@ -399,31 +399,31 @@ static void brip6_print(const void *ip, const struct xt_entry_match *match,
struct ebt_ip6_info *ipinfo = (struct ebt_ip6_info *)match->data;
if (ipinfo->bitmask & EBT_IP6_SOURCE) {
- printf("--ip6-src ");
if (ipinfo->invflags & EBT_IP6_SOURCE)
printf("! ");
+ printf("--ip6-src ");
printf("%s", xtables_ip6addr_to_numeric(&ipinfo->saddr));
printf("%s ", xtables_ip6mask_to_numeric(&ipinfo->smsk));
}
if (ipinfo->bitmask & EBT_IP6_DEST) {
- printf("--ip6-dst ");
if (ipinfo->invflags & EBT_IP6_DEST)
printf("! ");
+ printf("--ip6-dst ");
printf("%s", xtables_ip6addr_to_numeric(&ipinfo->daddr));
printf("%s ", xtables_ip6mask_to_numeric(&ipinfo->dmsk));
}
if (ipinfo->bitmask & EBT_IP6_TCLASS) {
- printf("--ip6-tclass ");
if (ipinfo->invflags & EBT_IP6_TCLASS)
printf("! ");
+ printf("--ip6-tclass ");
printf("0x%02X ", ipinfo->tclass);
}
if (ipinfo->bitmask & EBT_IP6_PROTO) {
struct protoent *pe;
- printf("--ip6-proto ");
if (ipinfo->invflags & EBT_IP6_PROTO)
printf("! ");
+ printf("--ip6-proto ");
pe = getprotobynumber(ipinfo->protocol);
if (pe == NULL) {
printf("%d ", ipinfo->protocol);
@@ -432,21 +432,21 @@ static void brip6_print(const void *ip, const struct xt_entry_match *match,
}
}
if (ipinfo->bitmask & EBT_IP6_SPORT) {
- printf("--ip6-sport ");
if (ipinfo->invflags & EBT_IP6_SPORT)
printf("! ");
+ printf("--ip6-sport ");
print_port_range(ipinfo->sport);
}
if (ipinfo->bitmask & EBT_IP6_DPORT) {
- printf("--ip6-dport ");
if (ipinfo->invflags & EBT_IP6_DPORT)
printf("! ");
+ printf("--ip6-dport ");
print_port_range(ipinfo->dport);
}
if (ipinfo->bitmask & EBT_IP6_ICMP6) {
- printf("--ip6-icmp-type ");
if (ipinfo->invflags & EBT_IP6_ICMP6)
printf("! ");
+ printf("--ip6-icmp-type ");
print_icmp_type(ipinfo->icmpv6_type, ipinfo->icmpv6_code);
}
}
diff --git a/extensions/libebt_ip6.t b/extensions/libebt_ip6.t
index 9d4effdc..6b3221ea 100644
--- a/extensions/libebt_ip6.t
+++ b/extensions/libebt_ip6.t
@@ -1,13 +1,15 @@
:INPUT,FORWARD,OUTPUT
--p ip6 --ip6-src ! dead::beef/64 -j ACCEPT;-p IPv6 --ip6-src ! dead::/64 -j ACCEPT;OK
+-p ip6 ! --ip6-src dead::beef/64 -j ACCEPT;-p IPv6 ! --ip6-src dead::/64 -j ACCEPT;OK
-p IPv6 --ip6-dst dead:beef::/64 -j ACCEPT;=;OK
-p IPv6 --ip6-dst f00:ba::;=;OK
-p IPv6 --ip6-tclass 0xFF;=;OK
-p IPv6 --ip6-proto tcp --ip6-dport 22;=;OK
--p IPv6 --ip6-proto tcp --ip6-dport ! 22;=;OK
+-p IPv6 --ip6-proto tcp ! --ip6-dport 22;=;OK
-p IPv6 --ip6-proto udp --ip6-sport 1024:65535;=;OK
-p IPv6 --ip6-proto 253;=;OK
-p IPv6 --ip6-proto ipv6-icmp --ip6-icmp-type echo-request -j CONTINUE;=;OK
-p IPv6 --ip6-proto ipv6-icmp --ip6-icmp-type echo-request;=;OK
-p ip6 --ip6-protocol icmpv6 --ip6-icmp-type 1/1;-p IPv6 --ip6-proto ipv6-icmp --ip6-icmp-type communication-prohibited -j CONTINUE;OK
--p IPv6 --ip6-proto ipv6-icmp --ip6-icmp-type ! 1:10/0:255;=;OK
+-p IPv6 --ip6-proto ipv6-icmp ! --ip6-icmp-type 1:10/0:255;=;OK
+--ip6-proto ipv6-icmp ! --ip6-icmp-type 1:10/0:255;=;FAIL
+! -p IPv6 --ip6-proto ipv6-icmp ! --ip6-icmp-type 1:10/0:255;=;FAIL
diff --git a/extensions/libebt_mark_m.c b/extensions/libebt_mark_m.c
index 244fe12a..7bde77d9 100644
--- a/extensions/libebt_mark_m.c
+++ b/extensions/libebt_mark_m.c
@@ -86,9 +86,9 @@ static void brmark_m_print(const void *ip, const struct xt_entry_match *match,
{
struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)match->data;
- printf("--mark ");
if (info->invert)
printf("! ");
+ printf("--mark ");
if (info->bitmask == EBT_MARK_OR)
printf("/0x%lx ", info->mask);
else if (info->mask != 0xffffffff)
diff --git a/extensions/libebt_mark_m.t b/extensions/libebt_mark_m.t
index 00035427..9ad41704 100644
--- a/extensions/libebt_mark_m.t
+++ b/extensions/libebt_mark_m.t
@@ -1,6 +1,6 @@
:INPUT,FORWARD,OUTPUT
--mark 42;--mark 0x2a;OK
---mark ! 42;--mark ! 0x2a;OK
+--mark ! 42;! --mark 0x2a;OK
--mark 42/0xff;--mark 0x2a/0xff;OK
---mark ! 0x1/0xff;=;OK
+! --mark 0x1/0xff;=;OK
--mark /0x2;=;OK
diff --git a/extensions/libebt_pkttype.c b/extensions/libebt_pkttype.c
index 4e2d19de..265674d1 100644
--- a/extensions/libebt_pkttype.c
+++ b/extensions/libebt_pkttype.c
@@ -75,7 +75,10 @@ static void brpkttype_print(const void *ip, const struct xt_entry_match *match,
{
struct ebt_pkttype_info *pt = (struct ebt_pkttype_info *)match->data;
- printf("--pkttype-type %s", pt->invert ? "! " : "");
+ if (pt->invert)
+ printf("! ");
+
+ printf("--pkttype-type ");
if (pt->pkt_type < ARRAY_SIZE(classes))
printf("%s ", classes[pt->pkt_type]);
diff --git a/extensions/libebt_pkttype.t b/extensions/libebt_pkttype.t
index f5f76aaa..f870f5c7 100644
--- a/extensions/libebt_pkttype.t
+++ b/extensions/libebt_pkttype.t
@@ -1,9 +1,13 @@
:INPUT,FORWARD,OUTPUT
-! --pkttype-type host;--pkttype-type ! host -j CONTINUE;OK
--pkttype-type host;=;OK
+! --pkttype-type host;=;OK
--pkttype-type broadcast;=;OK
---pkttype-type ! multicast;=;OK
+! --pkttype-type broadcast;=;OK
--pkttype-type multicast;=;OK
+! --pkttype-type multicast;=;OK
--pkttype-type otherhost;=;OK
+! --pkttype-type otherhost;=;OK
--pkttype-type outgoing;=;OK
+! --pkttype-type outgoing;=;OK
--pkttype-type loopback;=;OK
+! --pkttype-type loopback;=;OK
diff --git a/extensions/libebt_standard.t b/extensions/libebt_standard.t
index c0b87e12..72081fd6 100644
--- a/extensions/libebt_standard.t
+++ b/extensions/libebt_standard.t
@@ -5,3 +5,7 @@
-s de:ad:be:ef:0:00 -j RETURN;-s de:ad:be:ef:00:00 -j RETURN;OK
-d de:ad:be:ef:00:00 -j CONTINUE;=;OK
-d de:ad:be:ef:0:00/ff:ff:ff:ff:0:0 -j DROP;-d de:ad:be:ef:00:00/ff:ff:ff:ff:00:00 -j DROP;OK
+-p ARP -j ACCEPT;=;OK
+! -p ARP -j ACCEPT;=;OK
+-p 0 -j ACCEPT;=;FAIL
+! -p 0 -j ACCEPT;=;FAIL
diff --git a/extensions/libebt_stp.c b/extensions/libebt_stp.c
index 06cf93b8..33e4c8d9 100644
--- a/extensions/libebt_stp.c
+++ b/extensions/libebt_stp.c
@@ -307,8 +307,9 @@ static void brstp_print(const void *ip, const struct xt_entry_match *match,
for (i = 0; i < STP_NUMOPS; i++) {
if (!(stpinfo->bitmask & (1 << i)))
continue;
- printf("--%s %s", brstp_opts[i].name,
- (stpinfo->invflags & (1 << i)) ? "! " : "");
+ if (stpinfo->invflags & (1 << i))
+ printf("! ");
+ printf("--%s ", brstp_opts[i].name);
if (EBT_STP_TYPE == (1 << i)) {
if (stpinfo->type == BPDU_TYPE_CONFIG)
printf("%s", BPDU_TYPE_CONFIG_STRING);
diff --git a/extensions/libebt_vlan.c b/extensions/libebt_vlan.c
index a2a9dcce..4a2eb712 100644
--- a/extensions/libebt_vlan.c
+++ b/extensions/libebt_vlan.c
@@ -108,14 +108,19 @@ static void brvlan_print(const void *ip, const struct xt_entry_match *match,
struct ebt_vlan_info *vlaninfo = (struct ebt_vlan_info *) match->data;
if (vlaninfo->bitmask & EBT_VLAN_ID) {
- printf("--vlan-id %s%d ", (vlaninfo->invflags & EBT_VLAN_ID) ? "! " : "", vlaninfo->id);
+ if (vlaninfo->invflags & EBT_VLAN_ID)
+ printf("! ");
+ printf("--vlan-id %d ", vlaninfo->id);
}
if (vlaninfo->bitmask & EBT_VLAN_PRIO) {
- printf("--vlan-prio %s%d ", (vlaninfo->invflags & EBT_VLAN_PRIO) ? "! " : "", vlaninfo->prio);
+ if (vlaninfo->invflags & EBT_VLAN_PRIO)
+ printf("! ");
+ printf("--vlan-prio %d ", vlaninfo->prio);
}
if (vlaninfo->bitmask & EBT_VLAN_ENCAP) {
- printf("--vlan-encap %s", (vlaninfo->invflags & EBT_VLAN_ENCAP) ? "! " : "");
- printf("%4.4X ", ntohs(vlaninfo->encap));
+ if (vlaninfo->invflags & EBT_VLAN_ENCAP)
+ printf("! ");
+ printf("--vlan-encap %4.4X ", ntohs(vlaninfo->encap));
}
}
diff --git a/extensions/libebt_vlan.t b/extensions/libebt_vlan.t
index 58471caa..106374cd 100644
--- a/extensions/libebt_vlan.t
+++ b/extensions/libebt_vlan.t
@@ -1,5 +1,13 @@
:INPUT,FORWARD,OUTPUT
-p 802_1Q --vlan-id 42;=;OK
--p 802_1Q --vlan-prio ! 1;=;OK
+-p 802_1Q ! --vlan-id 42;=;OK
+-p 802_1Q --vlan-prio 1;=;OK
+-p 802_1Q ! --vlan-prio 1;=;OK
-p 802_1Q --vlan-encap ip;-p 802_1Q --vlan-encap 0800 -j CONTINUE;OK
--p 802_1Q --vlan-encap IPv6 ! --vlan-id 1;-p 802_1Q --vlan-id ! 1 --vlan-encap 86DD -j CONTINUE;OK
+-p 802_1Q --vlan-encap 0800 ;=;OK
+-p 802_1Q ! --vlan-encap 0800 ;=;OK
+-p 802_1Q --vlan-encap IPv6 ! --vlan-id 1;-p 802_1Q ! --vlan-id 1 --vlan-encap 86DD -j CONTINUE;OK
+-p 802_1Q ! --vlan-id 1 --vlan-encap 86DD;=;OK
+--vlan-encap ip;=;FAIL
+--vlan-id 2;=;FAIL
+--vlan-prio 1;=;FAIL
diff --git a/iptables/nft-bridge.c b/iptables/nft-bridge.c
index 8c69a236..ad583a60 100644
--- a/iptables/nft-bridge.c
+++ b/iptables/nft-bridge.c
@@ -379,9 +379,9 @@ static void print_mac(char option, const unsigned char *mac,
const unsigned char *mask,
bool invert)
{
- printf("-%c ", option);
if (invert)
printf("! ");
+ printf("-%c ", option);
ebt_print_mac_and_mask(mac, mask);
printf(" ");
}
@@ -396,9 +396,9 @@ static void print_protocol(uint16_t ethproto, bool invert, unsigned int bitmask)
if (bitmask & EBT_NOPROTO)
return;
- printf("-p ");
if (invert)
printf("! ");
+ printf("-p ");
if (bitmask & EBT_802_3) {
printf("length ");