include/ap_listen.h

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#ifndef AP_LISTEN_H
#define AP_LISTEN_H

#include "apr_network_io.h"

typedef struct ap_listen_rec ap_listen_rec;
struct ap_listen_rec {
    ap_listen_rec *next;
    ap_socket_t *sd;
    int active;
#ifdef WIN32
    int count;
#endif
/* more stuff here, like which protocol is bound to the port */
};

extern ap_listen_rec *ap_listeners;

void ap_listen_pre_config(void);
int ap_listen_open(process_rec *process, unsigned port);
const char *ap_set_listenbacklog(cmd_parms *cmd, void *dummy, char *arg);
const char *ap_set_listener(cmd_parms *cmd, void *dummy, char *ips);
const char *ap_set_send_buffer_size(cmd_parms *cmd, void *dummy, char *arg);

#define LISTEN_COMMANDS	\
{ "ListenBacklog", ap_set_listenbacklog, NULL, RSRC_CONF, TAKE1, \
  "Maximum length of the queue of pending connections, as used by listen(2)" }, \
{ "Listen", ap_set_listener, NULL, RSRC_CONF, TAKE1, \
  "A port number or a numeric IP address and a port number"}, \
{ "SendBufferSize", ap_set_send_buffer_size, NULL, RSRC_CONF, TAKE1, \
  "Send buffer size in bytes"},

#endif