vdeslirp_add_fwd, vdeslirp_remove_fwd, vdeslirp_add_unixfwd, vdeslirp_remove_unixfwd,

       VirtualSquare. Project leader: Renzo Davoli.

VirtualSquare                                     January 2020                                 LIBVDESLIRPFWD(3)

       Bug reports should be addressed to <info@virtualsquare.org>

       Slirp, see libvdelirp(3), is a TCP/IP emulator. Slirp generates a virtual  network  using  standard  user
       privileges (no need for root access of CAP_NET_ADMIN). These functions manage port forwarding services.

       vdeslirp_add_fwd  and vdeslirp_remove_fwd respectively add and remove udp or tcp port forwarding services
       (depending upon the value of is_udp). host_addr and host_port are the IP address and  port  number  bound
       for  the  service in the host system. All the connections or datagrams to host_addr and host_port will be
       diverted to guest_addr and guest_port in the slirp virtual network.

       vdeslirp_add_unixfwd and vdeslirp_remove_unixfwd respectively add and remove a forwarding service towards
       a PF_UNIX stream socket on the hosting system. All the connections from a node of the virtual network  to
       guest_addr  and  guest_port  will  be diverted to the PF_UNIX bound to the pathname path. This feature is
       commonly used to run X-window  clients  in  the  virtual  network  (e.g.  the  value  of  path  could  be
       /tmp/.X11-unix/X0).

       If libslirp does not support slirp_add_unix, vdeslirp_add_unixfwd is implemented by a workaround based on
       nc(1).

       vdeslirp_cmd_fwd  adds  a  forwarding service to a command. A TCP connection to guest_addr and guest_port
       activates the command cmdline. Data exchanged on the TCP connection is forwarded as stdin/stdout  to  the
       command.

       vdeslirp_remove_cmdexec removes a command forwarding service.

       vdeslirp_add_fwd,        vdeslirp_remove_fwd,        vdeslirp_add_unixfwd,       vdeslirp_remove_unixfwd,
       vdeslirp_add_cmdexec - simple API for slirp, port forwarding

       All  these  functions  return  0  in  case  of  success,  -1  otherwise  (and errno is set consequently).
       vdeslirp_remove_cmdexec and vdeslirp_remove_unixfwd return -1 and set errno to ENOSYS  if  libslirp  does
       not support slirp_remove_guestfwd.

libvdeslirp(3), libvdeslirpcfg(3)

#include<libvdeslirp.h>intvdeslirp_add_fwd(structvdeslirp*slirp,intis_udp,structin_addrhost_addr,inthost_port,structin_addrguest_addr,intguest_port);intvdeslirp_remove_fwd(structvdeslirp*slirp,intis_udp,structin_addrhost_addr,inthost_port);intvdeslirp_add_unixfwd(structvdeslirp*slirp,char*path,structin_addrguest_addr,intguest_port);intvdeslirp_remove_unixfwd(structvdeslirp*slirp,structin_addrguest_addr,intguest_port);intvdeslirp_add_cmdexec(structvdeslirp*slirp,constchar*cmdline,structin_addr*guest_addr,intguest_port);intvdeslirp_remove_cmdexec(structvdeslirp*slirp,structin_addrguest_addr,intguest_port);