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std.Io.net.HostName.ResolvConf: ignore nameservers above max

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This commit is contained in:
Andrew Kelley 2025-10-19 07:09:28 -07:00
parent 83e4ff6f4c
commit b215f8667a
1 changed files with 6 additions and 3 deletions
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5
lib/std/Io/net/HostName.zig
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@ -310,6 +310,8 @@ pub const ResolvConf = struct {
search_buffer: [max_len]u8, search_buffer: [max_len]u8,
search_len: usize, search_len: usize,
/// According to resolv.conf(5) there is a maximum of 3 nameservers in this
/// file.
pub const max_nameservers = 3; pub const max_nameservers = 3;
/// Returns `error.StreamTooLong` if a line is longer than 512 bytes. /// Returns `error.StreamTooLong` if a line is longer than 512 bytes.
@ -394,10 +396,11 @@ pub const ResolvConf = struct {
} }
fn addNumeric(rc: *ResolvConf, io: Io, name: []const u8, port: u16) !void { fn addNumeric(rc: *ResolvConf, io: Io, name: []const u8, port: u16) !void {
assert(rc.nameservers_len < rc.nameservers_buffer.len); if (rc.nameservers_len < rc.nameservers_buffer.len) {
rc.nameservers_buffer[rc.nameservers_len] = try .resolve(io, name, port); rc.nameservers_buffer[rc.nameservers_len] = try .resolve(io, name, port);
rc.nameservers_len += 1; rc.nameservers_len += 1;
} }
}
pub fn nameservers(rc: *const ResolvConf) []const IpAddress { pub fn nameservers(rc: *const ResolvConf) []const IpAddress {
return rc.nameservers_buffer[0..rc.nameservers_len]; return rc.nameservers_buffer[0..rc.nameservers_len];