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chore(mod): simplify code and add more kernel config constants

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This commit is contained in:
Quentin McGaw
2026-03-02 23:20:47 +00:00
parent 11cd62f6b1
commit e7b25a0d5e
3 changed files with 34 additions and 49 deletions
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internal/mod/builtin_linux.go
-33
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@@ -1,33 +0,0 @@
package mod
import (
"bufio"
"errors"
"fmt"
"os"
"path/filepath"
"strings"
)
var errBuiltinModuleNotFound = errors.New("builtin module not found")
func checkModulesBuiltin(modulesPath, moduleName string) error {
f, err := os.Open(filepath.Join(modulesPath, "modules.builtin"))
if err != nil {
return err
}
defer f.Close()
moduleName = strings.TrimSuffix(moduleName, ".ko")
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := scanner.Text()
line = strings.TrimSuffix(line, ".ko")
if strings.HasSuffix(line, "/"+moduleName) {
return nil
}
}
return fmt.Errorf("%w: %s", errBuiltinModuleNotFound, moduleName)
}
internal/mod/configgz_linux.go
+30 -7
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@@ -76,28 +76,51 @@ func checkProcConfig(moduleName string) error {
func moduleNameToKernelFeatureGroups(moduleName string) (featureGroups [][]string, ok bool) {
moduleMap := map[string][][]string{
"x_tables": {{"CONFIG_NETFILTER_XTABLES"}},
"nf_tables": {{"CONFIG_NF_TABLES"}},
// Netfilter Matches
"xt_conntrack": {{"CONFIG_NETFILTER_XT_MATCH_CONNTRACK"}},
"xt_conntrack": {
{"CONFIG_NETFILTER_XT_MATCH_CONNTRACK"},
{"CONFIG_IP_NF_MATCH_CONNTRACK"}, // old kernels
},
"xt_connmark": {
{"CONFIG_NETFILTER_XT_CONNMARK"},
{"CONFIG_NETFILTER_XT_MATCH_CONNMARK", "CONFIG_NETFILTER_XT_TARGET_CONNMARK"},
},
"xt_mark": {
{"CONFIG_NETFILTER_XT_MARK"},
{"CONFIG_NETFILTER_XT_MATCH_MARK", "CONFIG_NETFILTER_XT_TARGET_MARK"},
{"CONFIG_NETFILTER_XT_MATCH_MARK"},
},
"nf_conntrack": {{"CONFIG_NF_CONNTRACK"}},
"nf_conntrack_ipv4": {{"CONFIG_NF_CONNTRACK_IPV4"}},
"nf_conntrack_ipv6": {{"CONFIG_NF_CONNTRACK_IPV6"}},
"nf_conntrack_netlink": {{"CONFIG_NF_CT_NETLINK"}},
"nf_reject_ipv4": {{"CONFIG_NF_REJECT_IPV4"}},
// Nftables
"nft_compat": {{"CONFIG_NFT_COMPAT"}},
"nft_ct": {{"CONFIG_NFT_CT"}},
"nft_connmark": {{"CONFIG_NFT_CONNMARK"}},
"nft_chain_filter": {{"CONFIG_NFT_CHAIN_FILTER_IPV4"}},
"nft_chain_filter_ipv4": {{"CONFIG_NFT_CHAIN_FILTER_IPV4"}},
"nft_chain_filter_ipv6": {{"CONFIG_NFT_CHAIN_FILTER_IPV6"}},
"nft_chain_mangle_ipv4": {{"CONFIG_NFT_CHAIN_MANGLE_IPV4"}},
"nft_chain_mangle_ipv6": {{"CONFIG_NFT_CHAIN_MANGLE_IPV6"}},
"nft_reject": {{"CONFIG_NFT_REJECT_INET"}, {"CONFIG_NFT_REJECT_IPV4"}},
// Iptables
"iptable_filter": {{"CONFIG_IP_NF_FILTER"}},
"ip6table_filter": {{"CONFIG_IP6_NF_FILTER"}},
"ip_tables": {{"CONFIG_IP_NF_IPTABLES"}},
"ip6_tables": {{"CONFIG_IP6_NF_IPTABLES"}},
// Common Netfilter Targets
"xt_log": {{"CONFIG_NETFILTER_XT_TARGET_LOG"}},
"xt_reject": {
"xt_LOG": {{"CONFIG_NETFILTER_XT_TARGET_LOG"}},
"xt_REJECT": {
{"CONFIG_IP_NF_TARGET_REJECT", "CONFIG_NF_REJECT_IPV4"},
{"CONFIG_NETFILTER_XT_TARGET_REJECT", "CONFIG_NF_REJECT_IPV4"},
},
"xt_masquerade": {{"CONFIG_NETFILTER_XT_TARGET_MASQUERADE"}},
"xt_MASQUERADE": {{"CONFIG_NETFILTER_XT_TARGET_MASQUERADE"}},
// Additional Netfilter Matches
"xt_addrtype": {{"CONFIG_NETFILTER_XT_MATCH_ADDRTYPE"}},
@@ -118,7 +141,7 @@ func moduleNameToKernelFeatureGroups(moduleName string) (featureGroups [][]strin
"fuse": {{"CONFIG_FUSE_FS"}},
}
featureGroups, ok = moduleMap[strings.ToLower(moduleName)]
featureGroups, ok = moduleMap[moduleName]
return featureGroups, ok
}
internal/mod/probe_linux.go
+1 -6
View File
@@ -10,9 +10,7 @@ import (
// It first tries to locate the modules directory in [getModulesPath].
// If it fails (like on WSL), it then only checks for the kernel feature
// in /proc/config.gz with [checkProcConfig].
// Otherwise, it first checks if the modules directory modules.builtin
// file contains the given module name in [checkModulesBuiltin].
// If the module is not found, it then runs the classic [modProbe] behavior,
// Otherwise, it then runs the classic [modProbe] behavior,
// trying to load the module in the kernel.
// If this fails, it does one final try running [checkProcConfig].
func Probe(moduleName string) error {
@@ -28,8 +26,6 @@ func Probe(moduleName string) error {
return fmt.Errorf("getting modules path: %w", err)
}
err = checkModulesBuiltin(modulesPath, moduleName)
if err != nil {
err = modProbe(modulesPath, moduleName)
if err != nil {
err = checkProcConfig(moduleName)
@@ -37,7 +33,6 @@ func Probe(moduleName string) error {
return fmt.Errorf("checking /proc/config.gz: %w", err)
}
}
}
return nil
}