Function nodeIp2String

app/redis-6.2.6/src/cluster.c:1547–1554

IP -> string conversion. 'buf' is supposed to at least be 46 bytes. * If 'announced_ip' length is non-zero, it is used instead of extracting * the IP from the socket peer address. */

 * If 'announced_ip' length is non-zero, it is used instead of extracting
 * the IP from the socket peer address. */
void nodeIp2String(char *buf, clusterLink *link, char *announced_ip) {
    if (announced_ip[0] != '\0') {
        memcpy(buf,announced_ip,NET_IP_STR_LEN);
        buf[NET_IP_STR_LEN-1] = '\0'; /* We are not sure the input is sane. */
    } else {
        connPeerToString(link->conn, buf, NET_IP_STR_LEN, NULL);
    }
}

/* Update the node address to the IP address that can be extracted
 * from link->fd, or if hdr->myip is non empty, to the address the node