Pull request 2100: v0.107.42-rc

Squashed commit of the following:

commit 284190f748345c7556e60b67f051ec5f6f080948
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed Dec 6 19:36:00 2023 +0300

    all: sync with master; upd chlog

internal/next/configmgr/config.go

@@ -0,0 +1,138 @@
+package configmgr
+
+import (
+	"fmt"
+	"net/netip"
+
+	"github.com/AdguardTeam/golibs/errors"
+	"github.com/AdguardTeam/golibs/timeutil"
+)
+
+// Configuration Structures
+
+// config is the top-level on-disk configuration structure.
+type config struct {
+	DNS  *dnsConfig  `yaml:"dns"`
+	HTTP *httpConfig `yaml:"http"`
+	Log  *logConfig  `yaml:"log"`
+	// TODO(a.garipov): Use.
+	SchemaVersion int `yaml:"schema_version"`
+}
+
+const errNoConf errors.Error = "configuration not found"
+
+// validate returns an error if the configuration structure is invalid.
+func (c *config) validate() (err error) {
+	if c == nil {
+		return errNoConf
+	}
+
+	// TODO(a.garipov): Add more validations.
+
+	// Keep this in the same order as the fields in the config.
+	validators := []struct {
+		validate func() (err error)
+		name     string
+	}{{
+		validate: c.DNS.validate,
+		name:     "dns",
+	}, {
+		validate: c.HTTP.validate,
+		name:     "http",
+	}, {
+		validate: c.Log.validate,
+		name:     "log",
+	}}
+
+	for _, v := range validators {
+		err = v.validate()
+		if err != nil {
+			return fmt.Errorf("%s: %w", v.name, err)
+		}
+	}
+
+	return nil
+}
+
+// dnsConfig is the on-disk DNS configuration.
+type dnsConfig struct {
+	Addresses           []netip.AddrPort  `yaml:"addresses"`
+	BootstrapDNS        []string          `yaml:"bootstrap_dns"`
+	UpstreamDNS         []string          `yaml:"upstream_dns"`
+	DNS64Prefixes       []netip.Prefix    `yaml:"dns64_prefixes"`
+	UpstreamTimeout     timeutil.Duration `yaml:"upstream_timeout"`
+	BootstrapPreferIPv6 bool              `yaml:"bootstrap_prefer_ipv6"`
+	UseDNS64            bool              `yaml:"use_dns64"`
+}
+
+// validate returns an error if the DNS configuration structure is invalid.
+//
+// TODO(a.garipov): Add more validations.
+func (c *dnsConfig) validate() (err error) {
+	// TODO(a.garipov): Add more validations.
+	switch {
+	case c == nil:
+		return errNoConf
+	case c.UpstreamTimeout.Duration <= 0:
+		return newMustBePositiveError("upstream_timeout", c.UpstreamTimeout)
+	default:
+		return nil
+	}
+}
+
+// httpConfig is the on-disk web API configuration.
+type httpConfig struct {
+	Pprof *httpPprofConfig `yaml:"pprof"`
+
+	// TODO(a.garipov): Document the configuration change.
+	Addresses       []netip.AddrPort  `yaml:"addresses"`
+	SecureAddresses []netip.AddrPort  `yaml:"secure_addresses"`
+	Timeout         timeutil.Duration `yaml:"timeout"`
+	ForceHTTPS      bool              `yaml:"force_https"`
+}
+
+// validate returns an error if the HTTP configuration structure is invalid.
+//
+// TODO(a.garipov): Add more validations.
+func (c *httpConfig) validate() (err error) {
+	switch {
+	case c == nil:
+		return errNoConf
+	case c.Timeout.Duration <= 0:
+		return newMustBePositiveError("timeout", c.Timeout)
+	default:
+		return c.Pprof.validate()
+	}
+}
+
+// httpPprofConfig is the on-disk pprof configuration.
+type httpPprofConfig struct {
+	Port    uint16 `yaml:"port"`
+	Enabled bool   `yaml:"enabled"`
+}
+
+// validate returns an error if the pprof configuration structure is invalid.
+func (c *httpPprofConfig) validate() (err error) {
+	if c == nil {
+		return errNoConf
+	}
+
+	return nil
+}
+
+// logConfig is the on-disk web API configuration.
+type logConfig struct {
+	// TODO(a.garipov): Use.
+	Verbose bool `yaml:"verbose"`
+}
+
+// validate returns an error if the HTTP configuration structure is invalid.
+//
+// TODO(a.garipov): Add more validations.
+func (c *logConfig) validate() (err error) {
+	if c == nil {
+		return errNoConf
+	}
+
+	return nil
+}