Clean up a bunch of things:
use value_string tables and make numerical fields numeric, with associated value_string tables, rather than strings; make a signed integer field signed, which means we don't have to format the item for it in the protocol tree ourselves; give it a long protocol name, and make the short protocol name all-caps, as with other short protocol names. svn path=/trunk/; revision=4696
This commit is contained in:
parent
70e640d2d8
commit
007a32e8b1
120
packet-pflog.c
120
packet-pflog.c
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@ -1,7 +1,7 @@
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/* packet-pflog.c
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* Routines for pflog (OpenBSD Firewall Logging) packet disassembly
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*
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* $Id: packet-pflog.c,v 1.2 2002/01/30 23:08:26 guy Exp $
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* $Id: packet-pflog.c,v 1.3 2002/02/05 00:43:59 guy Exp $
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*
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* Copyright 2001 Mike Frantzen
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* All rights reserved.
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@ -63,9 +63,6 @@ static int hf_pflog_dir = -1;
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static gint ett_pflog = -1;
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static char *pf_reasons[PFRES_MAX+2] = PFRES_NAMES;
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void
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capture_pflog(const u_char *pd, int offset, int len, packet_counts *ld)
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{
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@ -82,27 +79,63 @@ capture_pflog(const u_char *pd, int offset, int len, packet_counts *ld)
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memcpy(&pflogh, pd, sizeof(pflogh));
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NTOHL(pflogh.af);
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if (pflogh.af == BSD_PF_INET)
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switch (pflogh.af) {
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case BSD_PF_INET:
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capture_ip(pd, offset, len, ld);
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break;
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#ifdef notyet
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else if (pflogh.af == BSD_PF_INET6)
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case BSD_PF_INET6:
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capture_ipv6(pd, offset, len, ld);
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break;
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#endif
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else
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default:
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ld->other++;
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break;
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}
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}
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static const value_string af_vals[] = {
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{ BSD_PF_INET, "IPv4" },
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{ BSD_PF_INET6, "IPv6" },
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{ 0, NULL }
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};
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static const value_string reason_vals[] = {
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{ 0, "match" },
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{ 1, "bad-offset" },
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{ 2, "fragment" },
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{ 3, "short" },
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{ 4, "normalize" },
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{ 5, "memory" },
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{ 0, NULL }
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};
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static const value_string action_vals[] = {
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{ PF_PASS, "passed" },
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{ PF_DROP, "dropped" },
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{ PF_SCRUB, "scrubbed" },
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{ 0, NULL }
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};
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static const value_string dir_vals[] = {
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{ PF_IN, "in" },
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{ PF_OUT, "out" },
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{ 0, NULL }
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};
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static void
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dissect_pflog(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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struct pfloghdr pflogh;
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tvbuff_t *next_tvb;
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proto_tree *pflog_tree;
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proto_item *ti, *tf;
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char *why;
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proto_item *ti;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "pflog");
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PFLOG");
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/* Copy out the pflog header to insure alignment */
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tvb_memcpy(tvb, (guint8 *)&pflogh, 0, sizeof(pflogh));
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@ -114,55 +147,57 @@ dissect_pflog(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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NTOHS(pflogh.action);
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NTOHS(pflogh.dir);
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why = (pflogh.reason < PFRES_MAX) ? pf_reasons[pflogh.reason] : "unkn";
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if (tree) {
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ti = proto_tree_add_protocol_format(tree, proto_pflog, tvb, 0,
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PFLOG_HDRLEN,
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"PF Log %s %s on %s by rule %d", pflogh.af == BSD_PF_INET ? "IPv4" :
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pflogh.af == BSD_PF_INET6 ? "IPv6" : "unkn",
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pflogh.action == PF_PASS ? "passed" :
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pflogh.action == PF_DROP ? "dropped" :
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pflogh.action == PF_SCRUB ? "scrubbed" : "unkn",
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"PF Log %s %s on %s by rule %d",
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val_to_str(pflogh.af, af_vals, "unknown (%u)"),
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val_to_str(pflogh.action, action_vals, "unknown (%u)"),
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pflogh.ifname,
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pflogh.rnr);
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pflog_tree = proto_item_add_subtree(ti, ett_pflog);
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tf = proto_tree_add_uint_format(pflog_tree, hf_pflog_rnr, tvb,
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proto_tree_add_uint(pflog_tree, hf_pflog_af, tvb,
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offsetof(struct pfloghdr, af), sizeof(pflogh.af),
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pflogh.af);
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proto_tree_add_int(pflog_tree, hf_pflog_rnr, tvb,
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offsetof(struct pfloghdr, rnr), sizeof(pflogh.rnr),
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pflogh.rnr, "Rule Number: %d", pflogh.rnr);
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tf = proto_tree_add_string(pflog_tree, hf_pflog_ifname, tvb,
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offsetof(struct pfloghdr, reason), sizeof(pflogh.reason),
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pflogh.rnr);
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proto_tree_add_string(pflog_tree, hf_pflog_ifname, tvb,
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offsetof(struct pfloghdr, ifname), sizeof(pflogh.ifname),
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pflogh.ifname);
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tf = proto_tree_add_string(pflog_tree, hf_pflog_reason, tvb,
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proto_tree_add_uint(pflog_tree, hf_pflog_reason, tvb,
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offsetof(struct pfloghdr, reason), sizeof(pflogh.reason),
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why);
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tf = proto_tree_add_string(pflog_tree, hf_pflog_action, tvb,
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pflogh.reason);
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proto_tree_add_uint(pflog_tree, hf_pflog_action, tvb,
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offsetof(struct pfloghdr, action), sizeof(pflogh.action),
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pflogh.action == PF_PASS ? "pass" :
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pflogh.action == PF_DROP ? "drop" :
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pflogh.action == PF_SCRUB ? "scrub" : "unkn");
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tf = proto_tree_add_string(pflog_tree, hf_pflog_dir, tvb,
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pflogh.action);
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proto_tree_add_uint(pflog_tree, hf_pflog_dir, tvb,
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offsetof(struct pfloghdr, dir), sizeof(pflogh.dir),
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pflogh.dir == PF_IN ? "in" : "out");
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pflogh.dir);
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}
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/* Set the tvbuff for the payload after the header */
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next_tvb = tvb_new_subset(tvb, PFLOG_HDRLEN, -1, -1);
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pinfo->ethertype = (hf_pflog_af == BSD_PF_INET) ? ETHERTYPE_IP : ETHERTYPE_IPv6;
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if (pflogh.af == BSD_PF_INET)
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switch (pflogh.af) {
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case BSD_PF_INET:
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call_dissector(ip_handle, next_tvb, pinfo, tree);
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else if (pflogh.af == BSD_PF_INET6)
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break;
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case BSD_PF_INET6:
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call_dissector(ipv6_handle, next_tvb, pinfo, tree);
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else
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break;
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default:
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call_dissector(data_handle, next_tvb, pinfo, tree);
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break;
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_prepend_fstr(pinfo->cinfo, COL_INFO, "[%s %s/#%d] ",
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pflogh.action == PF_PASS ? "passed" :
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pflogh.action == PF_DROP ? "dropped" :
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pflogh.action == PF_SCRUB ? "scrubbed" : "unkn",
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val_to_str(pflogh.action, action_vals, "unknown (%u)"),
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pflogh.ifname,
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pflogh.rnr);
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}
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{
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static hf_register_info hf[] = {
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{ &hf_pflog_af,
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{ "Address Family", "pflog.af", FT_UINT32, BASE_DEC, NULL, 0x0,
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{ "Address Family", "pflog.af", FT_UINT32, BASE_DEC, VALS(af_vals), 0x0,
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"Protocol (IPv4 vs IPv6)", HFILL }},
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{ &hf_pflog_ifname,
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{ "Interface", "pflog.ifname", FT_STRING, BASE_NONE, NULL, 0x0,
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"Interface", HFILL }},
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{ &hf_pflog_rnr,
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{ "Rule Number", "pflog.rnr", FT_UINT16, BASE_DEC, NULL, 0x0,
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{ "Rule Number", "pflog.rnr", FT_INT16, BASE_DEC, NULL, 0x0,
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"Last matched firewall rule number", HFILL }},
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{ &hf_pflog_reason,
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{ "Reason", "pflog.reason", FT_STRING, BASE_NONE, NULL, 0x0,
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{ "Reason", "pflog.reason", FT_UINT16, BASE_DEC, VALS(reason_vals), 0x0,
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"Reason for logging the packet", HFILL }},
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{ &hf_pflog_action,
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{ "Action", "pflog.action", FT_STRING, BASE_NONE, NULL, 0x0,
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{ "Action", "pflog.action", FT_UINT16, BASE_DEC, VALS(action_vals), 0x0,
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"Action taken by PF on the packet", HFILL }},
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{ &hf_pflog_dir,
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{ "Direction", "pflog.dir", FT_STRING, BASE_NONE, NULL, 0x0,
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{ "Direction", "pflog.dir", FT_UINT16, BASE_DEC, VALS(dir_vals), 0x0,
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"Direction of packet in stack (inbound versus outbound)", HFILL }},
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};
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static gint *ett[] = { &ett_pflog };
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proto_pflog = proto_register_protocol("pflog", "pflog", "pflog");
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proto_pflog = proto_register_protocol("OpenBSD Packet Filter log file",
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"PFLOG", "pflog");
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proto_register_field_array(proto_pflog, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* packet-pflog.h
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*
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* $Id: packet-pflog.h,v 1.2 2002/01/29 10:44:43 guy Exp $
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* $Id: packet-pflog.h,v 1.3 2002/02/05 00:43:59 guy Exp $
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*
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* Copyright 2001 Mike Frantzen
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* All rights reserved.
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};
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#define PFLOG_HDRLEN sizeof(struct pfloghdr)
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/* Named reasons */
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#define PFRES_NAMES { \
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"match", \
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"bad-offset", \
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"fragment", \
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"short", \
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"normalize", \
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"memory", \
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NULL \
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}
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#define PFRES_MAX 6
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/* Actions */
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#define PF_PASS 0
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#define PF_DROP 1
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