kubeshark/tap/net_utils.go
David Levanon e696851261
Tapper Refactor (#396)
* introduce tcp_assembler and tcp_packet_source - the motivation is to … (#380)

* add passive-tapper main tester (#353)

* add passive-tapper main tester

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* rename main to tester

* build extenssions as part of the tester launch

* add a README to the tester

* solving go.mod and .sum conflicts with addition of go-errors

* trivial warning fixes (#354)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* tcp streams map (#355)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* change rlog to mizu logger

* errors map (#356)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* change int to uint - errorsmap

* change from int to uint

* Change errorsMap.nErrors to uint.

* change errors map to mizu logger instead of rlog

* init mizu logger in tester + fix errormap declaration

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* move own ips to tcp stream factory (#358)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* Feature/tapper refactor i/move own ips to tcp stream factory (#379)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* fix ownips compilation issue

* introduce tcp_assembler and tcp_packet_source - the motivation is to split the actual packet sources from the assembler, so we can have a single thread for the assembly which is separated from packet source threads

* make struts private at this point - planning to move some packages to their own package so we can utilize encapsulation

* move context to tcp_assembly + fix error check of tcp source packet

* use param instead of gloab flag for ipdefrag

* fix a typo

* remove unused pid param

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* extract stats functions out of the main tapping function (#381)

* add passive-tapper main tester (#353)

* add passive-tapper main tester

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* rename main to tester

* build extenssions as part of the tester launch

* add a README to the tester

* solving go.mod and .sum conflicts with addition of go-errors

* trivial warning fixes (#354)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* tcp streams map (#355)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* change rlog to mizu logger

* errors map (#356)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* change int to uint - errorsmap

* change from int to uint

* Change errorsMap.nErrors to uint.

* change errors map to mizu logger instead of rlog

* init mizu logger in tester + fix errormap declaration

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* move own ips to tcp stream factory (#358)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* Feature/tapper refactor i/move own ips to tcp stream factory (#379)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* fix ownips compilation issue

* introduce tcp_assembler and tcp_packet_source - the motivation is to split the actual packet sources from the assembler, so we can have a single thread for the assembly which is separated from packet source threads

* make struts private at this point - planning to move some packages to their own package so we can utilize encapsulation

* extract stats functions out of the main tapping function

* move context to tcp_assembly + fix error check of tcp source packet

* use param instead of gloab flag for ipdefrag

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* Feature/tapper refactor i/internal tapper stats (#384)

* add passive-tapper main tester (#353)

* add passive-tapper main tester

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* rename main to tester

* build extenssions as part of the tester launch

* add a README to the tester

* solving go.mod and .sum conflicts with addition of go-errors

* trivial warning fixes (#354)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* tcp streams map (#355)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* change rlog to mizu logger

* errors map (#356)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* change int to uint - errorsmap

* change from int to uint

* Change errorsMap.nErrors to uint.

* change errors map to mizu logger instead of rlog

* init mizu logger in tester + fix errormap declaration

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* move own ips to tcp stream factory (#358)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* Feature/tapper refactor i/move own ips to tcp stream factory (#379)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* fix ownips compilation issue

* introduce tcp_assembler and tcp_packet_source - the motivation is to split the actual packet sources from the assembler, so we can have a single thread for the assembly which is separated from packet source threads

* make struts private at this point - planning to move some packages to their own package so we can utilize encapsulation

* extract stats functions out of the main tapping function

* move context to tcp_assembly + fix error check of tcp source packet

* use param instead of gloab flag for ipdefrag

* introduce internal tapper stats

* minor fixes for errors map and internal stats

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* Feature/tapper refactor i/diagnose package (#386)

* add passive-tapper main tester (#353)

* add passive-tapper main tester

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* rename main to tester

* build extenssions as part of the tester launch

* add a README to the tester

* solving go.mod and .sum conflicts with addition of go-errors

* trivial warning fixes (#354)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* tcp streams map (#355)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* change rlog to mizu logger

* errors map (#356)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* change int to uint - errorsmap

* change from int to uint

* Change errorsMap.nErrors to uint.

* change errors map to mizu logger instead of rlog

* init mizu logger in tester + fix errormap declaration

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* move own ips to tcp stream factory (#358)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* Feature/tapper refactor i/move own ips to tcp stream factory (#379)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* fix ownips compilation issue

* introduce tcp_assembler and tcp_packet_source - the motivation is to split the actual packet sources from the assembler, so we can have a single thread for the assembly which is separated from packet source threads

* make struts private at this point - planning to move some packages to their own package so we can utilize encapsulation

* extract stats functions out of the main tapping function

* move context to tcp_assembly + fix error check of tcp source packet

* use param instead of gloab flag for ipdefrag

* introduce internal tapper stats

* minor fixes for errors map and internal stats

* move errors map + app stats + internal stats + periodic tasks to diagnose package

* initialize tapper internal stats

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* move tcp packet source to its packet (#387)

* add passive-tapper main tester (#353)

* add passive-tapper main tester

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* rename main to tester

* build extenssions as part of the tester launch

* add a README to the tester

* solving go.mod and .sum conflicts with addition of go-errors

* trivial warning fixes (#354)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* disable host mode for tester - to avoid filterAuthorities

* tcp streams map (#355)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* change rlog to mizu logger

* errors map (#356)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* change int to uint - errorsmap

* change from int to uint

* Change errorsMap.nErrors to uint.

* change errors map to mizu logger instead of rlog

* init mizu logger in tester + fix errormap declaration

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* move own ips to tcp stream factory (#358)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* Feature/tapper refactor i/move own ips to tcp stream factory (#379)

* add passive-tapper main tester

* trivial warning fixes

* add errors to go.sum of mizu agent

* tcp streams map

* disable host mode for tester - to avoid filterAuthorities

* set tcp streams map for tcp stream factory

* errors map

* move own ips to tcp stream factory

* fix ownips compilation issue

* introduce tcp_assembler and tcp_packet_source - the motivation is to split the actual packet sources from the assembler, so we can have a single thread for the assembly which is separated from packet source threads

* make struts private at this point - planning to move some packages to their own package so we can utilize encapsulation

* extract stats functions out of the main tapping function

* move context to tcp_assembly + fix error check of tcp source packet

* use param instead of gloab flag for ipdefrag

* introduce internal tapper stats

* minor fixes for errors map and internal stats

* move errors map + app stats + internal stats + periodic tasks to diagnose package

* move tcp packet source to its packet

* initialize tapper internal stats

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

* Fix coding style

* Remove `tap/internal_stats.go`

* make channel between input and assembler blocking - to preserve the same behaviour we have before the refactor

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>
Co-authored-by: M. Mert Yildiran <mehmet@up9.com>
2021-10-25 13:59:06 +03:00

66 lines
1.4 KiB
Go

package tap
import (
"net"
"strings"
"github.com/up9inc/mizu/tap/diagnose"
)
var privateIPBlocks []*net.IPNet
func init() {
initPrivateIPBlocks()
}
// Get this host ipv4 and ipv6 addresses on all interfaces
func getLocalhostIPs() ([]string, error) {
addrMasks, err := net.InterfaceAddrs()
if err != nil {
// TODO: return error, log error
return nil, err
}
myIPs := make([]string, len(addrMasks))
for ii, addr := range addrMasks {
myIPs[ii] = strings.Split(addr.String(), "/")[0]
}
return myIPs, nil
}
//lint:ignore U1000 will be used in the future
func isPrivateIP(ipStr string) bool {
ip := net.ParseIP(ipStr)
if ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
return true
}
for _, block := range privateIPBlocks {
if block.Contains(ip) {
return true
}
}
return false
}
func initPrivateIPBlocks() {
for _, cidr := range []string{
"127.0.0.0/8", // IPv4 loopback
"10.0.0.0/8", // RFC1918
"172.16.0.0/12", // RFC1918
"192.168.0.0/16", // RFC1918
"169.254.0.0/16", // RFC3927 link-local
"::1/128", // IPv6 loopback
"fe80::/10", // IPv6 link-local
"fc00::/7", // IPv6 unique local addr
} {
_, block, err := net.ParseCIDR(cidr)
if err != nil {
diagnose.TapErrors.Error("Private-IP-Block-Parse", "parse error on %q: %v", cidr, err)
} else {
privateIPBlocks = append(privateIPBlocks, block)
}
}
}