all: import netsniff-ng 0.5.8-rc0 source

We decided to get rid of the old Git history and start a new one for
several reasons:

 *) Allow / enforce only high-quality commits (which was not the case
    for many commits in the history), have a policy that is more close
    to the one from the Linux kernel. With high quality commits, we
    mean code that is logically split into commits and commit messages
    that are signed-off and have a proper subject and message body.
    We do not allow automatic Github merges anymore, since they are
    total bullshit. However, we will either cherry-pick your patches
    or pull them manually.

 *) The old archive was about ~27MB for no particular good reason.
    This basically derived from the bad decision that also some PDF
    files where stored there. From this moment onwards, no binary
    objects are allowed to be stored in this repository anymore.

The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 219 insertions, 0 deletions

diff --git a/dissector_eth.c b/dissector_eth.c
new file mode 100644
index 0000000..f352645
--- /dev/null
+++ b/dissector_eth.c
@@ -0,0 +1,219 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2009, 2010 Daniel Borkmann.
+ * Subject to the GPL, version 2.
+ */
+
+#include <stdint.h>
+
+#include "hash.h"
+#include "oui.h"
+#include "protos.h"
+#include "pkt_buff.h"
+#include "dissector.h"
+#include "dissector_eth.h"
+#include "xmalloc.h"
+
+struct hash_table eth_lay2;
+struct hash_table eth_lay3;
+
+static struct hash_table eth_ether_types;
+static struct hash_table eth_ports_udp;
+static struct hash_table eth_ports_tcp;
+
+struct port {
+	unsigned int id;
+	char *port;
+	struct port *next;
+};
+
+#define __do_lookup_inline(id, struct_name, hash_ptr, struct_member)	\
+	({								\
+		struct struct_name *entry = lookup_hash(id, hash_ptr);	\
+									\
+		while (entry && id != entry->id)			\
+			entry = entry->next;				\
+									\
+		(entry && id == entry->id ? entry->struct_member : 0);	\
+	})
+
+char *lookup_port_udp(unsigned int id)
+{
+	return __do_lookup_inline(id, port, &eth_ports_udp, port);
+}
+
+char *lookup_port_tcp(unsigned int id)
+{
+	return __do_lookup_inline(id, port, &eth_ports_tcp, port);
+}
+
+char *lookup_ether_type(unsigned int id)
+{
+	return __do_lookup_inline(id, port, &eth_ether_types, port);
+}
+
+#ifdef __WITH_PROTOS
+static inline void dissector_init_entry(int type)
+{
+	dissector_set_print_type(&ethernet_ops, type);
+}
+
+static inline void dissector_init_exit(int type)
+{
+	dissector_set_print_type(&none_ops, type);
+}
+
+static void dissector_init_layer_2(int type)
+{
+	init_hash(&eth_lay2);
+	INSERT_HASH_PROTOS(arp_ops, eth_lay2);
+	INSERT_HASH_PROTOS(lldp_ops, eth_lay2);
+	INSERT_HASH_PROTOS(vlan_ops, eth_lay2);
+	INSERT_HASH_PROTOS(ipv4_ops, eth_lay2);
+	INSERT_HASH_PROTOS(ipv6_ops, eth_lay2);
+	INSERT_HASH_PROTOS(QinQ_ops, eth_lay2);
+	INSERT_HASH_PROTOS(mpls_uc_ops, eth_lay2);
+	for_each_hash_int(&eth_lay2, dissector_set_print_type, type);
+}
+
+static void dissector_init_layer_3(int type)
+{
+	init_hash(&eth_lay3);
+	INSERT_HASH_PROTOS(icmpv4_ops, eth_lay3);
+	INSERT_HASH_PROTOS(icmpv6_ops, eth_lay3);
+	INSERT_HASH_PROTOS(igmp_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ip_auth_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ip_esp_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_dest_opts_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_fragm_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_hop_by_hop_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_in_ipv4_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_mobility_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_no_next_header_ops, eth_lay3);
+	INSERT_HASH_PROTOS(ipv6_routing_ops, eth_lay3);
+	INSERT_HASH_PROTOS(tcp_ops, eth_lay3);
+	INSERT_HASH_PROTOS(udp_ops, eth_lay3);
+	for_each_hash_int(&eth_lay3, dissector_set_print_type, type);
+}
+#else
+static inline void dissector_init_entry(int type) {}
+static inline void dissector_init_exit(int type) {}
+static void dissector_init_layer_2(int type) {}
+static void dissector_init_layer_3(int type) {}
+#endif /* __WITH_PROTOS */
+
+enum ports {
+	PORTS_UDP,
+	PORTS_TCP,
+	PORTS_ETHER,
+};
+
+static void dissector_init_ports(enum ports which)
+{
+	FILE *fp;
+	char buff[128], *ptr, *file;
+	struct hash_table *table;
+	struct port *p;
+	void **pos;
+
+	switch (which) {
+	case PORTS_UDP:
+		file = "/etc/netsniff-ng/udp.conf";
+		table = &eth_ports_udp;
+		break;
+	case PORTS_TCP:
+		file = "/etc/netsniff-ng/tcp.conf";
+		table = &eth_ports_tcp;
+		break;
+	case PORTS_ETHER:
+		file = "/etc/netsniff-ng/ether.conf";
+		table = &eth_ether_types;
+		break;
+	default:
+		bug();
+	}
+
+	fp = fopen(file, "r");
+	if (!fp)
+		panic("No %s found!\n", file);
+
+	memset(buff, 0, sizeof(buff));
+
+	while (fgets(buff, sizeof(buff), fp) != NULL) {
+		buff[sizeof(buff) - 1] = 0;
+		ptr = buff;
+
+		p = xmalloc(sizeof(*p));
+		p->id = strtol(ptr, &ptr, 0);
+
+		if ((ptr = strstr(buff, ", ")))
+			ptr += strlen(", ");
+		ptr = strtrim_right(ptr, '\n');
+		ptr = strtrim_right(ptr, ' ');
+
+		p->port = xstrdup(ptr);
+		p->next = NULL;
+
+		pos = insert_hash(p->id, p, table);
+		if (pos) {
+			p->next = *pos;
+			*pos = p;
+		}
+
+		memset(buff, 0, sizeof(buff));
+	}
+
+	fclose(fp);
+}
+
+static int dissector_cleanup_ports(void *ptr)
+{
+	struct port *tmp, *p = ptr;
+
+	if (!ptr)
+		return 0;
+
+	while ((tmp = p->next)) {
+		xfree(p->port);
+		xfree(p);
+		p = tmp;
+	}
+
+	xfree(p->port);
+	xfree(p);
+
+	return 0;
+}
+
+void dissector_init_ethernet(int fnttype)
+{
+	dissector_init_entry(fnttype);
+	dissector_init_layer_2(fnttype);
+	dissector_init_layer_3(fnttype);
+	dissector_init_exit(fnttype);
+
+#ifdef __WITH_PROTOS
+	dissector_init_oui();
+#endif
+	dissector_init_ports(PORTS_UDP);
+	dissector_init_ports(PORTS_TCP);
+	dissector_init_ports(PORTS_ETHER);
+}
+
+void dissector_cleanup_ethernet(void)
+{
+	free_hash(&eth_lay2);
+	free_hash(&eth_lay3);
+
+	for_each_hash(&eth_ether_types, dissector_cleanup_ports);
+	for_each_hash(&eth_ports_udp, dissector_cleanup_ports);
+	for_each_hash(&eth_ports_tcp, dissector_cleanup_ports);
+
+	free_hash(&eth_ether_types);
+	free_hash(&eth_ports_udp);
+	free_hash(&eth_ports_tcp);
+
+#ifdef __WITH_PROTOS
+	dissector_cleanup_oui();
+#endif
+}