eigrpd more ibuf cleanup

[Claudio Jeker]

Same change as done in other daemons, use ibuf_data() and ibuf_size().

-- 
:wq Claudio

Index: packet.c
===================================================================
RCS file: /cvs/src/usr.sbin/eigrpd/packet.c,v
retrieving revision 1.21
diff -u -p -r1.21 packet.c
--- packet.c    26 Jun 2023 14:07:19 -0000      1.21
+++ packet.c    30 Jun 2023 08:10:37 -0000
@@ -97,7 +97,7 @@ send_packet_v4(struct iface *iface, stru
        memset(&msg, 0, sizeof(msg));
        iov[0].iov_base = &ip_hdr;
        iov[0].iov_len = sizeof(ip_hdr);
-       iov[1].iov_base = buf->buf;
+       iov[1].iov_base = ibuf_data(buf);
        iov[1].iov_len = ibuf_size(buf);
        msg.msg_name = &dst;
        msg.msg_namelen = sizeof(dst);
@@ -144,7 +144,7 @@ send_packet_v6(struct iface *iface, stru
                        return (-1);
                }
 
-       if (sendto(global.eigrp_socket_v6, buf->buf, buf->wpos, 0,
+       if (sendto(global.eigrp_socket_v6, ibuf_data(buf), ibuf_size(buf), 0,
            (struct sockaddr *)&sa6, sizeof(sa6)) == -1) {
                log_warn("%s: error sending packet on interface %s",
                    __func__, iface->name);