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Avoid invalid socket address in length calculation #123798

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Apr 11, 2024
Merged

Avoid invalid socket address in length calculation #123798

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4 changes: 2 additions & 2 deletions library/core/src/net/socket_addr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -591,7 +591,7 @@ impl fmt::Display for SocketAddrV4 {
if f.precision().is_none() && f.width().is_none() {
write!(f, "{}:{}", self.ip(), self.port())
} else {
const LONGEST_IPV4_SOCKET_ADDR: &str = "255.255.255.255:65536";
const LONGEST_IPV4_SOCKET_ADDR: &str = "255.255.255.255:65535";

let mut buf = DisplayBuffer::<{ LONGEST_IPV4_SOCKET_ADDR.len() }>::new();
// Buffer is long enough for the longest possible IPv4 socket address, so this should never fail.
Expand Down Expand Up @@ -621,7 +621,7 @@ impl fmt::Display for SocketAddrV6 {
}
} else {
const LONGEST_IPV6_SOCKET_ADDR: &str =
"[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff%4294967296]:65536";
"[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff%4294967295]:65535";

let mut buf = DisplayBuffer::<{ LONGEST_IPV6_SOCKET_ADDR.len() }>::new();
match self.scope_id() {
Expand Down
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