feat(runtime): implement `server.requestIp` + node:http `socket.address()` (#6165)

* [server] requestIp and AnyRequestContext
Changed Request.uws_request to the new AnyRequestContext. This
allows grabbing the IP from a Request. Unfinished.

* [server] basic `requestIp` implementation

Currently using uws's requestIpAsText, which always returns a ipv6
string. We should return a `SocketAddress` object to the user instead,
which will contain the formatted address string and what type it is.
We'll have to use requestIpAsBinary and parse that ourselves.

* TypeScript docs, use `bun.String`, return `undefined` instead of `null`
if we can't get the ip.

* binary address formatting

* uws getRemoteAddress binding

* remove dead code

* working

* final touches:sparkles:

* I will abide by the results of this poll.

---------

Co-authored-by: Parzival-3141 <29632054+Parzival-3141@users.noreply.github.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/packages/bun-usockets/src/socket.c b/packages/bun-usockets/src/socket.c
index ce5203ccb..78185e681 100644
--- a/packages/bun-usockets/src/socket.c
+++ b/packages/bun-usockets/src/socket.c
@@ -280,3 +280,25 @@ int us_socket_raw_write(int ssl, struct us_socket_t *s, const char *data, int le
  // non-TLS is always raw
  return us_socket_write(ssl, s, data, length, msg_more);
 }
+
+unsigned int us_get_remote_address_info(char *buf, struct us_socket_t *s, const char **dest, int *port, int *is_ipv6)
+{
+    // This function is manual inlining + modification of
+    //      us_socket_remote_address
+    //      AsyncSocket::getRemoteAddress
+    // To get { ip, port, is_ipv6 } for Bun.serve().requestIP()
+    struct bsd_addr_t addr;
+    if (bsd_remote_addr(us_poll_fd(&s->p), &addr)) {
+        return 0;
+    } 
+
+    int length = bsd_addr_get_ip_length(&addr);
+    if (!length) {
+        return 0;
+    }
+
+    memcpy(buf, bsd_addr_get_ip(&addr), length);
+    *port = bsd_addr_get_port(&addr);
+
+    return length;
+}
\ No newline at end of file