Function changeBindAddr

app/redis-6.2.6/src/server.c:5654–5718

}

int changeBindAddr(sds *addrlist, int addrlist_len) {
    int i;
    int result = C_OK;

    char *prev_bindaddr[CONFIG_BINDADDR_MAX];
    int prev_bindaddr_count;

    /* Close old TCP and TLS servers */
    closeSocketListeners(&server.ipfd);
    closeSocketListeners(&server.tlsfd);

    /* Keep previous settings */
    prev_bindaddr_count = server.bindaddr_count;
    memcpy(prev_bindaddr, server.bindaddr, sizeof(server.bindaddr));

    /* Copy new settings */
    memset(server.bindaddr, 0, sizeof(server.bindaddr));
    for (i = 0; i < addrlist_len; i++) {
        server.bindaddr[i] = zstrdup(addrlist[i]);
    }
    server.bindaddr_count = addrlist_len;

    /* Bind to the new port */
    if ((server.port != 0 && listenToPort(server.port, &server.ipfd) != C_OK) ||
        (server.tls_port != 0 && listenToPort(server.tls_port, &server.tlsfd) != C_OK)) {
        serverLog(LL_WARNING, "Failed to bind, trying to restore old listening sockets.");

        /* Restore old bind addresses */
        for (i = 0; i < addrlist_len; i++) {
            zfree(server.bindaddr[i]);
        }
        memcpy(server.bindaddr, prev_bindaddr, sizeof(server.bindaddr));
        server.bindaddr_count = prev_bindaddr_count;

        /* Re-Listen TCP and TLS */
        server.ipfd.count = 0;
        if (server.port != 0 && listenToPort(server.port, &server.ipfd) != C_OK) {
            serverPanic("Failed to restore old listening sockets.");
        }

        server.tlsfd.count = 0;
        if (server.tls_port != 0 && listenToPort(server.tls_port, &server.tlsfd) != C_OK) {
            serverPanic("Failed to restore old listening sockets.");
        }

        result = C_ERR;
    } else {
        /* Free old bind addresses */
        for (i = 0; i < prev_bindaddr_count; i++) {
            zfree(prev_bindaddr[i]);
        }
    }

    /* Create TCP and TLS event handlers */
    if (createSocketAcceptHandler(&server.ipfd, acceptTcpHandler) != C_OK) {
        serverPanic("Unrecoverable error creating TCP socket accept handler.");
    }
    if (createSocketAcceptHandler(&server.tlsfd, acceptTLSHandler) != C_OK) {