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wireshark/wireshark-0022-Fix-IP-types.patch
Peter Lemenkov ab5f7ca144 A couple of bugfixes and enhancements 
- Updated RTPproxy dissector (again)
- Fix rare issue with the Sniffer traces (patch no. 23)

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
2014-01-13 16:38:45 +04:00

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From: Peter Lemenkov <lemenkov@gmail.com>
Date: Fri, 13 Dec 2013 22:10:21 +0400
Subject: [PATCH] Fix IP types
Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
diff --git a/epan/dissectors/packet-rtpproxy.c b/epan/dissectors/packet-rtpproxy.c
index e8c5c95..6291de3 100644
--- a/epan/dissectors/packet-rtpproxy.c
+++ b/epan/dissectors/packet-rtpproxy.c
@@ -40,6 +40,9 @@
#include <epan/expert.h>
#include <epan/rtp_pt.h>
+#include <epan/exceptions.h>
+#include <epan/show_exception.h>
+
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
@@ -69,8 +72,8 @@ static int hf_rtpproxy_command = -1;
static int hf_rtpproxy_command_parameters = -1;
static int hf_rtpproxy_command_parameter = -1;
static int hf_rtpproxy_command_parameter_codec = -1;
-static int hf_rtpproxy_command_parameter_local = -1;
-static int hf_rtpproxy_command_parameter_remote = -1;
+static int hf_rtpproxy_command_parameter_local_ipv4 = -1;
+static int hf_rtpproxy_command_parameter_remote_ipv4 = -1;
static int hf_rtpproxy_command_parameter_repacketize = -1;
static int hf_rtpproxy_command_parameter_dtmf = -1;
/* static int hf_rtpproxy_command_parameter_cmap = -1; TODO */
@@ -294,8 +297,8 @@ rtpproxy_add_tag(proto_tree *rtpproxy_tree, tvbuff_t *tvb, guint begin, guint re
return (end == realsize ? -1 : (gint)end);
}
-void
-rtpproxy_add_parameter(proto_tree *rtpproxy_tree, tvbuff_t *tvb, guint begin, guint realsize)
+static void
+rtpproxy_add_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *rtpproxy_tree, guint begin, guint realsize)
{
proto_item *ti;
proto_tree *another_tree = NULL;
@@ -306,6 +309,7 @@ rtpproxy_add_parameter(proto_tree *rtpproxy_tree, tvbuff_t *tvb, guint begin, gu
gchar** codecs = NULL;
guint codec_len;
guint8* rawstr = NULL;
+ guint32 ipaddr[4]; /* Enough room for IPv4 or IPv6 */
/* Extract the entire parameters line. */
/* Something like "t4p1iic8,0,2,4,18,96,97,98,100,101" */
@@ -338,13 +342,19 @@ rtpproxy_add_parameter(proto_tree *rtpproxy_tree, tvbuff_t *tvb, guint begin, gu
case 'l':
new_offset = (gint)strspn(rawstr+offset, "0123456789.");
another_tree = proto_item_add_subtree(ti, ett_rtpproxy_command_parameters_local);
- proto_tree_add_item(another_tree, hf_rtpproxy_command_parameter_local, tvb, begin+offset, new_offset, ENC_ASCII | ENC_NA);
+ if(inet_pton(AF_INET, (char*)tvb_get_ephemeral_string(tvb, begin+offset, new_offset), ipaddr))
+ proto_tree_add_ipv4(another_tree, hf_rtpproxy_command_parameter_local_ipv4, tvb, begin+offset, new_offset, ipaddr[0]);
+ else
+ show_exception(tvb, pinfo, another_tree, DissectorError, "Bogus IPv4");
offset += new_offset;
break;
case 'r':
new_offset = (gint)strspn(rawstr+offset, "0123456789.");
another_tree = proto_item_add_subtree(ti, ett_rtpproxy_command_parameters_remote);
- proto_tree_add_item(another_tree, hf_rtpproxy_command_parameter_remote, tvb, begin+offset, new_offset, ENC_ASCII | ENC_NA);
+ if(inet_pton(AF_INET, (char*)tvb_get_ephemeral_string(tvb, begin+offset, new_offset), ipaddr))
+ proto_tree_add_ipv4(another_tree, hf_rtpproxy_command_parameter_remote_ipv4, tvb, begin+offset, new_offset, ipaddr[0]);
+ else
+ show_exception(tvb, pinfo, another_tree, DissectorError, "Bogus IPv4");
offset += new_offset;
break;
case 'z':
@@ -437,12 +447,13 @@ rtpproxy_add_tid(gboolean is_request, tvbuff_t *tvb, packet_info *pinfo, proto_t
return rtpproxy_info;
}
-void
-rtpproxy_add_notify_addr(proto_tree *rtpproxy_tree, tvbuff_t *tvb, guint begin, guint end)
+static void
+rtpproxy_add_notify_addr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *rtpproxy_tree, guint begin, guint end)
{
gint offset = 0;
gint tmp = 0;
gboolean ipv6 = FALSE;
+ guint32 ipaddr[4]; /* Enough room for IPv4 or IPv6 */
proto_item *ti;
/* Check for at least one colon */
@@ -454,17 +465,28 @@ rtpproxy_add_notify_addr(proto_tree *rtpproxy_tree, tvbuff_t *tvb, guint begin,
offset = tmp;
}
/* We have ip:port */
- if(ipv6)
- proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_notify_ipv6, tvb, begin, offset - begin, ENC_ASCII | ENC_NA);
- else
- proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_notify_ipv4, tvb, begin, offset - begin, ENC_ASCII | ENC_NA);
+ if(ipv6){
+ if(inet_pton(AF_INET6, (char*)tvb_get_ephemeral_string(tvb, begin, offset - begin), ipaddr))
+ proto_tree_add_ipv6(rtpproxy_tree, hf_rtpproxy_notify_ipv6, tvb, begin, offset - begin, (const guint8 *)ipaddr);
+ else
+ show_exception(tvb, pinfo, rtpproxy_tree, DissectorError, "Bogus IPv6");
+ }
+ else{
+ if(inet_pton(AF_INET, (char*)tvb_get_ephemeral_string(tvb, begin, offset - begin), ipaddr))
+ proto_tree_add_ipv4(rtpproxy_tree, hf_rtpproxy_notify_ipv4, tvb, begin, offset - begin, ipaddr[0]);
+ else
+ show_exception(tvb, pinfo, rtpproxy_tree, DissectorError, "Bogus IPv4");
+ }
proto_tree_add_uint(rtpproxy_tree, hf_rtpproxy_notify_port, tvb, offset+1, end - (offset+1),
(guint16) g_ascii_strtoull((gchar*)tvb_get_ephemeral_string(tvb, offset+1, end - (offset+1)), NULL, 10));
}
else{
- /* Only port is supplied */
- ti = proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_notify_ipv4, tvb, begin, 0, ENC_ASCII | ENC_NA);
- proto_item_append_text(ti, "<skipped>");
+ /* Only port is supplied - take IPv4/IPv6 from ip.src/ipv6.src respectively */
+ expert_add_info_format(pinfo, rtpproxy_tree, PI_PROTOCOL, PI_WARN, "Only port is supplied - take IPv4/IPv6 from ip.src/ipv6.src respectively");
+ if (pinfo->src.type == AT_IPv4)
+ ti = proto_tree_add_ipv4(rtpproxy_tree, hf_rtpproxy_notify_ipv4, tvb, begin, 0, ((guint32*)(pinfo->src.data))[0]);
+ else
+ ti = proto_tree_add_ipv6(rtpproxy_tree, hf_rtpproxy_notify_ipv6, tvb, begin, 0, (const guint8 *)(pinfo->src.data));
PROTO_ITEM_SET_GENERATED(ti);
proto_tree_add_uint(rtpproxy_tree, hf_rtpproxy_notify_port, tvb, begin, end - begin,
(guint16) g_ascii_strtoull((gchar*)tvb_get_ephemeral_string(tvb, begin, end - begin), NULL, 10));
@@ -490,7 +512,7 @@ dissect_rtpproxy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data
/* For RT(C)P setup */
address addr;
guint16 port;
- guint32 ipaddr[4];
+ guint32 ipaddr[4]; /* Enough room for IPv4 or IPv6 */
rtpproxy_info_t *rtpproxy_info = NULL;
/* If it does not start with a printable character it's not RTPProxy */
@@ -600,7 +622,7 @@ dissect_rtpproxy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data
if (new_offset != offset + 1){
rtpproxy_tree = proto_item_add_subtree(ti, ett_rtpproxy_command);
ti2 = proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_command_parameters, tvb, offset+1, new_offset - (offset+1), ENC_ASCII | ENC_NA);
- rtpproxy_add_parameter(proto_item_add_subtree(ti2, ett_rtpproxy_command_parameters), tvb, offset+1, new_offset - (offset+1));
+ rtpproxy_add_parameter(tvb, pinfo, proto_item_add_subtree(ti2, ett_rtpproxy_command_parameters), offset+1, new_offset - (offset+1));
rtpproxy_tree = proto_item_get_parent(ti);
}
@@ -623,10 +645,18 @@ dissect_rtpproxy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data
if ((tmp == 'u') || (tmp == 'l')){
/* Extract IP */
new_offset = tvb_find_guint8(tvb, offset, -1, ' ');
- if (tvb_find_guint8(tvb, offset, new_offset - offset, ':') == -1)
- proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_ipv4, tvb, offset, new_offset - offset, ENC_ASCII | ENC_NA);
- else
- proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_ipv6, tvb, offset, new_offset - offset, ENC_ASCII | ENC_NA);
+ if (tvb_find_guint8(tvb, offset, new_offset - offset, ':') == -1){
+ if(inet_pton(AF_INET, (char*)tvb_get_ephemeral_string(tvb, offset, new_offset - offset), ipaddr))
+ proto_tree_add_ipv4(rtpproxy_tree, hf_rtpproxy_ipv4, tvb, offset, new_offset - offset, ipaddr[0]);
+ else
+ show_exception(tvb, pinfo, rtpproxy_tree, DissectorError, "Bogus IPv4");
+ }
+ else{
+ if(inet_pton(AF_INET6, (char*)tvb_get_ephemeral_string(tvb, offset, new_offset - offset), ipaddr))
+ proto_tree_add_ipv6(rtpproxy_tree, hf_rtpproxy_ipv6, tvb, offset, new_offset - offset, (const guint8 *)ipaddr);
+ else
+ show_exception(tvb, pinfo, rtpproxy_tree, DissectorError, "Bogus IPv6");
+ }
/* Skip whitespace */
offset = tvb_skip_wsp(tvb, new_offset+1, -1);
@@ -686,12 +716,12 @@ dissect_rtpproxy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data
new_offset = tvb_find_guint8(tvb, offset, -1, ' ');
if(new_offset == -1){
/* NotifyTag wasn't found (we should re-use Call-ID instead) */
- rtpproxy_add_notify_addr(rtpproxy_tree, tvb, offset, realsize);
+ rtpproxy_add_notify_addr(tvb, pinfo, rtpproxy_tree, offset, realsize);
break; /* No more parameters */
}
/* NotifyTag was found */
- rtpproxy_add_notify_addr(rtpproxy_tree, tvb, offset, new_offset);
+ rtpproxy_add_notify_addr(tvb, pinfo, rtpproxy_tree, offset, new_offset);
/* Skip whitespace */
offset = tvb_skip_wsp(tvb, new_offset+1, -1);
@@ -760,29 +790,38 @@ dissect_rtpproxy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data
offset = tvb_skip_wsp(tvb, new_offset+1, -1);
/* Extract IP */
+ memset(&addr, 0, sizeof(address));
tmp = tvb_find_line_end(tvb, offset, -1, &new_offset, FALSE);
if (tvb_find_guint8(tvb, offset, -1, ':') == -1){
- inet_pton(AF_INET, (char*)tvb_get_ephemeral_string(tvb, offset, tmp), ipaddr);
- addr.type = AT_IPv4;
- addr.len = 4;
- addr.data = ep_memdup(ipaddr, 4);
- proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_ipv4, tvb, offset, tmp, ENC_ASCII | ENC_NA);
+ if (inet_pton(AF_INET, (char*)tvb_get_ephemeral_string(tvb, offset, tmp), ipaddr)){
+ addr.type = AT_IPv4;
+ addr.len = 4;
+ addr.data = ep_memdup(ipaddr, 4);
+ proto_tree_add_ipv4(rtpproxy_tree, hf_rtpproxy_ipv4, tvb, offset, tmp, ipaddr[0]);
+ }
+ else
+ show_exception(tvb, pinfo, rtpproxy_tree, DissectorError, "Bogus IPv4");
}
else{
- inet_pton(AF_INET6, (char*)tvb_get_ephemeral_string(tvb, offset, tmp), ipaddr);
- addr.type = AT_IPv6;
- addr.len = 16;
- addr.data = ep_memdup(ipaddr, 16);
- proto_tree_add_item(rtpproxy_tree, hf_rtpproxy_ipv6, tvb, offset, tmp, ENC_ASCII | ENC_NA);
+ if (inet_pton(AF_INET6, (char*)tvb_get_ephemeral_string(tvb, offset, tmp), ipaddr)){
+ addr.type = AT_IPv6;
+ addr.len = 16;
+ addr.data = ep_memdup(ipaddr, 16);
+ proto_tree_add_ipv6(rtpproxy_tree, hf_rtpproxy_ipv6, tvb, offset, tmp, (const guint8 *)ipaddr);
+ }
+ else
+ show_exception(tvb, pinfo, rtpproxy_tree, DissectorError, "Bogus IPv6");
}
if(rtpproxy_establish_conversation){
if (rtp_handle) {
/* FIXME tell if isn't a video stream, and setup codec mapping */
- rtp_add_address(pinfo, &addr, port, 0, "RTPproxy", pinfo->fd->num, 0, NULL);
+ if (addr.len)
+ rtp_add_address(pinfo, &addr, port, 0, "RTPproxy", pinfo->fd->num, 0, NULL);
}
if (rtcp_handle) {
- rtcp_add_address(pinfo, &addr, port+1, 0, "RTPproxy", pinfo->fd->num);
+ if (addr.len)
+ rtcp_add_address(pinfo, &addr, port+1, 0, "RTPproxy", pinfo->fd->num);
}
}
break;
@@ -884,7 +923,7 @@ proto_register_rtpproxy(void)
{
"IPv4",
"rtpproxy.ipv4",
- FT_STRING,
+ FT_IPv4,
BASE_NONE,
NULL,
0x0,
@@ -897,7 +936,7 @@ proto_register_rtpproxy(void)
{
"IPv6",
"rtpproxy.ipv6",
- FT_STRING,
+ FT_IPv6,
BASE_NONE,
NULL,
0x0,
@@ -984,11 +1023,11 @@ proto_register_rtpproxy(void)
}
},
{
- &hf_rtpproxy_command_parameter_local,
+ &hf_rtpproxy_command_parameter_local_ipv4,
{
- "Local IP address",
- "rtpproxy.command_parameter_local",
- FT_STRING,
+ "Local IPv4 address",
+ "rtpproxy.command_parameter_local_ipv4",
+ FT_IPv4, /* FIXME - is it ever possible to see IPv6 here? */
BASE_NONE,
NULL,
0x0,
@@ -997,11 +1036,11 @@ proto_register_rtpproxy(void)
}
},
{
- &hf_rtpproxy_command_parameter_remote,
+ &hf_rtpproxy_command_parameter_remote_ipv4,
{
- "Remote IP address",
- "rtpproxy.command_parameter_remote",
- FT_STRING,
+ "Remote IPv4 address",
+ "rtpproxy.command_parameter_remote_ipv4",
+ FT_IPv4, /* FIXME - is it ever possible to see IPv6 here? */
BASE_NONE,
NULL,
0x0,
@@ -1170,7 +1209,7 @@ proto_register_rtpproxy(void)
{
"Notification IPv4",
"rtpproxy.notify_ipv4",
- FT_STRING,
+ FT_IPv4,
BASE_NONE,
NULL,
0x0,
@@ -1183,7 +1222,7 @@ proto_register_rtpproxy(void)
{
"Notification IPv6",
"rtpproxy.notify_ipv6",
- FT_STRING,
+ FT_IPv6,
BASE_NONE,
NULL,
0x0,
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