str
The base relative to which 'offset' is
measured. Possible values are: - IPV4: Points to
the beginning of the IPv4 header. - IPV6: Points
to the beginning of the IPv6 header. - TCP:
Points to the beginning of the TCP header,
skipping over any IPv4 options or IPv6 extension
headers. Not present for non-first fragments. -
UDP: Points to the beginning of the UDP header,
skipping over any IPv4 options or IPv6 extension
headers. Not present for non-first fragments.
required Check the Base enum for the list of
possible values.
This field is a member of oneof_ _base.
mask
str
If specified, apply this mask (bitwise AND)
to the field to ignore bits before matching.
Encoded as a hexadecimal number (starting with
"0x"). The last byte of the field (in network
byte order) corresponds to the least significant
byte of the mask.
This field is a member of oneof_ _mask.
name
str
The name of this field. Must be unique within
the policy.
This field is a member of oneof_ _name.
offset
int
Offset of the first byte of the field (in
network byte order) relative to 'base'.
This field is a member of oneof_ _offset.
size
int
Size of the field in bytes. Valid values:
1-4.
This field is a member of oneof_ _size.
Classes
Base
Base(value)
The base relative to which 'offset' is measured. Possible
values are: - IPV4: Points to the beginning of the IPv4 header.
IPV6: Points to the beginning of the IPv6 header. - TCP:
Points to the beginning of the TCP header, skipping over any
IPv4 options or IPv6 extension headers. Not present for
non-first fragments. - UDP: Points to the beginning of the UDP
header, skipping over any IPv4 options or IPv6 extension
headers. Not present for non-first fragments. required
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-11 UTC."],[],[],null,["# Class SecurityPolicyUserDefinedField (1.35.0)\n\nVersion latestkeyboard_arrow_down\n\n- [1.35.0 (latest)](/python/docs/reference/compute/latest/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.34.0](/python/docs/reference/compute/1.34.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.33.0](/python/docs/reference/compute/1.33.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.32.0](/python/docs/reference/compute/1.32.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.31.0](/python/docs/reference/compute/1.31.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.30.0](/python/docs/reference/compute/1.30.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.29.0](/python/docs/reference/compute/1.29.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.28.0](/python/docs/reference/compute/1.28.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.27.0](/python/docs/reference/compute/1.27.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.26.0](/python/docs/reference/compute/1.26.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.25.0](/python/docs/reference/compute/1.25.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.24.0](/python/docs/reference/compute/1.24.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.23.0](/python/docs/reference/compute/1.23.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.22.0](/python/docs/reference/compute/1.22.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.21.0](/python/docs/reference/compute/1.21.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.20.1](/python/docs/reference/compute/1.20.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.19.2](/python/docs/reference/compute/1.19.2/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.18.0](/python/docs/reference/compute/1.18.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.17.0](/python/docs/reference/compute/1.17.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.16.1](/python/docs/reference/compute/1.16.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.15.0](/python/docs/reference/compute/1.15.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.14.1](/python/docs/reference/compute/1.14.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.13.0](/python/docs/reference/compute/1.13.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.12.1](/python/docs/reference/compute/1.12.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.11.0](/python/docs/reference/compute/1.11.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.10.1](/python/docs/reference/compute/1.10.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.9.0](/python/docs/reference/compute/1.9.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.8.0](/python/docs/reference/compute/1.8.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.7.0](/python/docs/reference/compute/1.7.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.6.1](/python/docs/reference/compute/1.6.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.5.2](/python/docs/reference/compute/1.5.2/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.4.0](/python/docs/reference/compute/1.4.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.3.2](/python/docs/reference/compute/1.3.2/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.2.0](/python/docs/reference/compute/1.2.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.1.0](/python/docs/reference/compute/1.1.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [1.0.0](/python/docs/reference/compute/1.0.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.9.0](/python/docs/reference/compute/0.9.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.8.0](/python/docs/reference/compute/0.8.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.7.0](/python/docs/reference/compute/0.7.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.6.0](/python/docs/reference/compute/0.6.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.5.0](/python/docs/reference/compute/0.5.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.4.2](/python/docs/reference/compute/0.4.2/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.3.0](/python/docs/reference/compute/0.3.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.2.1](/python/docs/reference/compute/0.2.1/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField)\n- [0.1.0](/python/docs/reference/compute/0.1.0/google.cloud.compute_v1.types.SecurityPolicyUserDefinedField) \n\n SecurityPolicyUserDefinedField(\n mapping=None, *, ignore_unknown_fields=False, **kwargs\n )\n\n.. _oneof: \u003chttps://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields\u003e\n\nClasses\n-------\n\n### Base\n\n Base(value)\n\nThe base relative to which 'offset' is measured. Possible\nvalues are: - IPV4: Points to the beginning of the IPv4 header.\n\n- IPV6: Points to the beginning of the IPv6 header. - TCP: Points to the beginning of the TCP header, skipping over any IPv4 options or IPv6 extension headers. Not present for non-first fragments. - UDP: Points to the beginning of the UDP header, skipping over any IPv4 options or IPv6 extension headers. Not present for non-first fragments. required"]]