[libvirt] [PATCH] nwfilter: Some fixes to XML parser
Stefan Berger
stefanb at us.ibm.com
Wed Mar 31 20:45:04 UTC 2010
While writing a couple of test cases for the nwfilter's XML parser I
found some cases where the output ended up not looking as expected. So
the following changes are in the patch below:
- if the protocol ID in the MAC header is an integer, just write it into
the datastructure without trying to find a corresponding string for it
and if none is found failing
- when writing the protocol ID as string, simply write it as integer if
no corresponding string can be found
- same changes for arpOpcode parsing and printing
- same changes for protocol ID in an IP packet
- DSCP value needs to be written into the data structure
- IP protocol version number is redundant at this level, so remove it
- parse the protocol ID found inside an IP packet not only as string but
also as uint8
- arrange the display of the src and destination masks to be shown after
the src and destination ip address respectively in the XML
- the existing libvirt IP address parser accepts for example '25' as an
IP address. I want this to be parsed as a CIDR type netmask. So try to
parse it as an integer first (CIDR netmask) and if that doesn't work as
a dotted IP address style netmask.
- instantiation of rules with MAC masks didn't work because they weren't
printed into a buffer, yet.
Signed-off-by: Stefan Berger <stefanb at us.ibm.com>
---
src/conf/nwfilter_conf.c | 128 ++++++++++++++----------------
src/nwfilter/nwfilter_ebiptables_driver.c | 1
2 files changed, 61 insertions(+), 68 deletions(-)
Index: libvirt-acl/src/conf/nwfilter_conf.c
===================================================================
--- libvirt-acl.orig/src/conf/nwfilter_conf.c
+++ libvirt-acl/src/conf/nwfilter_conf.c
@@ -403,15 +403,12 @@ checkMacProtocolID(enum attrDatatype dat
virNWFilterRuleDefPtr nwf ATTRIBUTE_UNUSED)
{
int32_t res = -1;
- const char *str;
if (datatype == DATATYPE_STRING) {
if (intMapGetByString(macProtoMap, (char *)value, 1, &res) == 0)
res = -1;
} else if (datatype == DATATYPE_UINT16) {
- if (intMapGetByInt(macProtoMap,
- (int32_t)*(uint16_t *)value, &str) == 0)
- res = -1;
+ res = (uint32_t)*(uint16_t *)value;
}
if (res != -1) {
@@ -433,9 +430,10 @@ macProtocolIDFormatter(virBufferPtr buf,
nwf->p.ethHdrFilter.dataProtocolID.u.u16,
&str)) {
virBufferVSprintf(buf, "%s", str);
- return 1;
+ } else {
+ virBufferVSprintf(buf, "%d", nwf->p.ethHdrFilter.dataProtocolID.u.u16);
}
- return 0;
+ return 1;
}
@@ -500,15 +498,12 @@ arpOpcodeValidator(enum attrDatatype dat
virNWFilterRuleDefPtr nwf)
{
int32_t res = -1;
- const char *str;
if (datatype == DATATYPE_STRING) {
if (intMapGetByString(arpOpcodeMap, (char *)value, 1, &res) == 0)
res = -1;
} else if (datatype == DATATYPE_UINT16) {
- if (intMapGetByInt(arpOpcodeMap,
- (uint32_t)*(uint16_t *)value, &str) == 0)
- res = -1;
+ res = (uint32_t)*(uint16_t *)value;
}
if (res != -1) {
@@ -530,9 +525,10 @@ arpOpcodeFormatter(virBufferPtr buf,
nwf->p.arpHdrFilter.dataOpcode.u.u16,
&str)) {
virBufferVSprintf(buf, "%s", str);
- return 1;
+ } else {
+ virBufferVSprintf(buf, "%d", nwf->p.arpHdrFilter.dataOpcode.u.u16);
}
- return 0;
+ return 1;
}
@@ -560,16 +556,12 @@ static bool checkIPProtocolID(enum attrD
virNWFilterRuleDefPtr nwf)
{
int32_t res = -1;
- const char *str;
if (datatype == DATATYPE_STRING) {
if (intMapGetByString(ipProtoMap, (char *)value, 1, &res) == 0)
res = -1;
} else if (datatype == DATATYPE_UINT8) {
- // may just accept what user provides and not test...
- if (intMapGetByInt(ipProtoMap,
- (uint32_t)*(uint16_t *)value, &str) == 0)
- res = -1;
+ res = (uint32_t)*(uint16_t *)value;
}
if (res != -1) {
@@ -591,19 +583,24 @@ formatIPProtocolID(virBufferPtr buf,
nwf->p.ipHdrFilter.ipHdr.dataProtocolID.u.u8,
&str)) {
virBufferVSprintf(buf, "%s", str);
- return 1;
+ } else {
+ virBufferVSprintf(buf, "%d",
+ nwf->p.ipHdrFilter.ipHdr.dataProtocolID.u.u8);
}
- return 0;
+ return 1;
}
static bool
dscpValidator(enum attrDatatype datatype ATTRIBUTE_UNUSED, void *val,
- virNWFilterRuleDefPtr nwf ATTRIBUTE_UNUSED)
+ virNWFilterRuleDefPtr nwf)
{
uint8_t dscp = *(uint16_t *)val;
if (dscp > 63)
return 0;
+
+ nwf->p.ipHdrFilter.ipHdr.dataDSCP.u.u8 = dscp;
+
return 1;
}
@@ -685,11 +682,6 @@ static const virXMLAttr2Struct arpAttrib
static const virXMLAttr2Struct ipAttributes[] = {
COMMON_MAC_PROPS(ipHdrFilter),
{
- .name = "version",
- .datatype = DATATYPE_UINT8,
- .dataIdx = offsetof(virNWFilterRuleDef, p.ipHdrFilter.ipHdr.dataIPVersion),
- },
- {
.name = SRCIPADDR,
.datatype = DATATYPE_IPADDR,
.dataIdx = offsetof(virNWFilterRuleDef, p.ipHdrFilter.ipHdr.dataSrcIPAddr),
@@ -711,7 +703,7 @@ static const virXMLAttr2Struct ipAttribu
},
{
.name = "protocol",
- .datatype = DATATYPE_STRING,
+ .datatype = DATATYPE_STRING | DATATYPE_UINT8,
.dataIdx = offsetof(virNWFilterRuleDef, p.ipHdrFilter.ipHdr.dataProtocolID),
.validator= checkIPProtocolID,
.formatter= formatIPProtocolID,
@@ -756,16 +748,16 @@ static const virXMLAttr2Struct ipv6Attri
.dataIdx = offsetof(virNWFilterRuleDef, p.ipv6HdrFilter.ipHdr.dataSrcIPAddr),
},
{
- .name = DSTIPADDR,
- .datatype = DATATYPE_IPV6ADDR,
- .dataIdx = offsetof(virNWFilterRuleDef, p.ipv6HdrFilter.ipHdr.dataDstIPAddr),
- },
- {
.name = SRCIPMASK,
.datatype = DATATYPE_IPV6MASK,
.dataIdx = offsetof(virNWFilterRuleDef, p.ipv6HdrFilter.ipHdr.dataSrcIPMask),
},
{
+ .name = DSTIPADDR,
+ .datatype = DATATYPE_IPV6ADDR,
+ .dataIdx = offsetof(virNWFilterRuleDef, p.ipv6HdrFilter.ipHdr.dataDstIPAddr),
+ },
+ {
.name = DSTIPMASK,
.datatype = DATATYPE_IPV6MASK,
.dataIdx = offsetof(virNWFilterRuleDef, p.ipv6HdrFilter.ipHdr.dataDstIPMask),
@@ -818,16 +810,16 @@ static const virXMLAttr2Struct ipv6Attri
.dataIdx = offsetof(virNWFilterRuleDef, p.STRUCT.ipHdr.dataSrcIPAddr),\
},\
{\
- .name = DSTIPADDR,\
- .datatype = ADDRTYPE,\
- .dataIdx = offsetof(virNWFilterRuleDef, p.STRUCT.ipHdr.dataDstIPAddr),\
- },\
- {\
.name = SRCIPMASK,\
.datatype = MASKTYPE,\
.dataIdx = offsetof(virNWFilterRuleDef, p.STRUCT.ipHdr.dataSrcIPMask),\
},\
{\
+ .name = DSTIPADDR,\
+ .datatype = ADDRTYPE,\
+ .dataIdx = offsetof(virNWFilterRuleDef, p.STRUCT.ipHdr.dataDstIPAddr),\
+ },\
+ {\
.name = DSTIPMASK,\
.datatype = MASKTYPE,\
.dataIdx = offsetof(virNWFilterRuleDef, p.STRUCT.ipHdr.dataDstIPMask),\
@@ -1276,26 +1268,26 @@ virNWFilterRuleDetailsParse(virConnectPt
case DATATYPE_IPMASK:
storage_ptr = &item->u.u8;
- if (!virNWIPv4AddressParser(prop, &ipaddr)) {
- if (sscanf(prop, "%d", &int_val) == 1) {
- if (int_val >= 0 && int_val <= 32) {
- if (!validator)
- *(uint8_t *)storage_ptr =
- (uint8_t)int_val;
- found = 1;
- data_ptr = &int_val;
- } else
- rc = -1;
+ if (virStrToLong_i(prop, NULL, 10, &int_val) == 0) {
+ if (int_val >= 0 && int_val <= 32) {
+ if (!validator)
+ *(uint8_t *)storage_ptr =
+ (uint8_t)int_val;
+ found = 1;
+ data_ptr = &int_val;
} else
rc = -1;
} else {
- int_val = virSocketGetNumNetmaskBits(
+ if (virNWIPv4AddressParser(prop, &ipaddr)) {
+ int_val = virSocketGetNumNetmaskBits(
&ipaddr.addr);
- if (int_val >= 0)
- *(uint8_t *)storage_ptr = int_val;
- else
+ if (int_val >= 0)
+ *(uint8_t *)storage_ptr = int_val;
+ else
+ rc = -1;
+ found = 1;
+ } else
rc = -1;
- found = 1;
}
break;
@@ -1330,26 +1322,26 @@ virNWFilterRuleDetailsParse(virConnectPt
case DATATYPE_IPV6MASK:
storage_ptr = &item->u.u8;
- if (!virNWIPv6AddressParser(prop, &ipaddr)) {
- if (sscanf(prop, "%d", &int_val) == 1) {
- if (int_val >= 0 && int_val <= 128) {
- if (!validator)
- *(uint8_t *)storage_ptr =
- (uint8_t)int_val;
- found = 1;
- data_ptr = &int_val;
- } else
- rc = -1;
+ if (virStrToLong_i(prop, NULL, 10, &int_val) == 0) {
+ if (int_val >= 0 && int_val <= 128) {
+ if (!validator)
+ *(uint8_t *)storage_ptr =
+ (uint8_t)int_val;
+ found = 1;
+ data_ptr = &int_val;
} else
rc = -1;
} else {
- int_val = virSocketGetNumNetmaskBits(
- &ipaddr.addr);
- if (int_val >= 0)
- *(uint8_t *)storage_ptr = int_val;
- else
- rc = -1;
- found = 1;
+ if (virNWIPv6AddressParser(prop, &ipaddr)) {
+ int_val = virSocketGetNumNetmaskBits(
+ &ipaddr.addr);
+ if (int_val >= 0)
+ *(uint8_t *)storage_ptr = int_val;
+ else
+ rc = -1;
+ found = 1;
+ } else
+ rc = -1;
}
break;
Index: libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c
===================================================================
--- libvirt-acl.orig/src/nwfilter/nwfilter_ebiptables_driver.c
+++ libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c
@@ -189,6 +189,7 @@ printDataType(virConnectPtr conn,
break;
case DATATYPE_MACADDR:
+ case DATATYPE_MACMASK:
if (bufsize < VIR_MAC_STRING_BUFLEN) {
virNWFilterReportError(conn, VIR_ERR_INVALID_NWFILTER,
_("Buffer too small for MAC address"));
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