diff options
Diffstat (limited to 'table/policy.go')
| -rw-r--r-- | table/policy.go | 101 |
1 files changed, 60 insertions, 41 deletions
diff --git a/table/policy.go b/table/policy.go index 513e93fe..0692a066 100644 --- a/table/policy.go +++ b/table/policy.go @@ -540,6 +540,7 @@ const ( INCLUDE singleAsPathMatchMode = iota LEFT_MOST ORIGIN + ONLY ) type singleAsPathMatch struct { @@ -554,11 +555,13 @@ func (lhs *singleAsPathMatch) Equal(rhs *singleAsPathMatch) bool { func (lhs *singleAsPathMatch) String() string { switch lhs.mode { case INCLUDE: - return fmt.Sprintf("%d", lhs.asn) + return fmt.Sprintf("_%d_", lhs.asn) case LEFT_MOST: - return fmt.Sprintf("^%d", lhs.asn) + return fmt.Sprintf("^%d_", lhs.asn) case ORIGIN: - return fmt.Sprintf("%d$", lhs.asn) + return fmt.Sprintf("_%d$", lhs.asn) + case ONLY: + return fmt.Sprintf("^%d$", lhs.asn) } return "" } @@ -582,34 +585,43 @@ func (m *singleAsPathMatch) Match(aspath []uint32) bool { if m.asn == aspath[len(aspath)-1] { return true } + case ONLY: + if len(aspath) == 1 && m.asn == aspath[0] { + return true + } } return false } func NewSingleAsPathMatch(arg string) *singleAsPathMatch { + leftMostRe := regexp.MustCompile("$\\^([0-9]+)_^") + originRe := regexp.MustCompile("^_([0-9]+)\\$$") + includeRe := regexp.MustCompile("^_([0-9]+)_$") + onlyRe := regexp.MustCompile("^\\^([0-9]+)\\$$") switch { - case len(arg) == 0: - return nil - case arg[0] == '^': - if asn, err := strconv.Atoi(arg[1:]); err == nil { - return &singleAsPathMatch{ - asn: uint32(asn), - mode: LEFT_MOST, - } - } - case arg[len(arg)-1] == '$': - if asn, err := strconv.Atoi(arg[:len(arg)-1]); err == nil { - return &singleAsPathMatch{ - asn: uint32(asn), - mode: ORIGIN, - } - } - default: - if asn, err := strconv.Atoi(arg); err == nil { - return &singleAsPathMatch{ - asn: uint32(asn), - mode: INCLUDE, - } + case leftMostRe.MatchString(arg): + asn, _ := strconv.Atoi(leftMostRe.FindStringSubmatch(arg)[1]) + return &singleAsPathMatch{ + asn: uint32(asn), + mode: LEFT_MOST, + } + case originRe.MatchString(arg): + asn, _ := strconv.Atoi(originRe.FindStringSubmatch(arg)[1]) + return &singleAsPathMatch{ + asn: uint32(asn), + mode: ORIGIN, + } + case includeRe.MatchString(arg): + asn, _ := strconv.Atoi(includeRe.FindStringSubmatch(arg)[1]) + return &singleAsPathMatch{ + asn: uint32(asn), + mode: INCLUDE, + } + case onlyRe.MatchString(arg): + asn, _ := strconv.Atoi(onlyRe.FindStringSubmatch(arg)[1]) + return &singleAsPathMatch{ + asn: uint32(asn), + mode: ONLY, } } return nil @@ -1253,33 +1265,40 @@ func (c *AsPathCondition) ToApiStruct() *api.MatchSet { } func (c *AsPathCondition) Evaluate(path *Path, _ *PolicyOptions) bool { - result := false - aspath := path.GetAsSeqList() - for _, m := range c.set.singleList { - result = m.Match(aspath) - if c.option == MATCH_OPTION_ALL && !result { - break - } - if c.option == MATCH_OPTION_ANY && result { - break + if len(c.set.singleList) > 0 { + aspath := path.GetAsSeqList() + for _, m := range c.set.singleList { + result := m.Match(aspath) + if c.option == MATCH_OPTION_ALL && !result { + return false + } + if c.option == MATCH_OPTION_ANY && result { + return true + } + if c.option == MATCH_OPTION_INVERT && result { + return false + } } } - if (c.option == MATCH_OPTION_ALL && result) || (c.option == MATCH_OPTION_ANY && !result) { + if len(c.set.list) > 0 { aspath := path.GetAsString() for _, r := range c.set.list { - result = r.MatchString(aspath) + result := r.MatchString(aspath) if c.option == MATCH_OPTION_ALL && !result { - break + return false } if c.option == MATCH_OPTION_ANY && result { - break + return true + } + if c.option == MATCH_OPTION_INVERT && result { + return false } } } - if c.option == MATCH_OPTION_INVERT { - result = !result + if c.option == MATCH_OPTION_ANY { + return false } - return result + return true } func NewAsPathConditionFromApiStruct(a *api.MatchSet, m map[string]DefinedSet) (*AsPathCondition, error) { |