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SO_REUSEADDR per default on TCP LISTEN; so-reuseaddr=

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This commit is contained in:
Gerhard Rieger 2023-10-26 19:45:01 +02:00
parent b5640dd707
commit 2a9623d61c
9 changed files with 714 additions and 242 deletions

36
xio-socket.c
View file

@ -97,7 +97,7 @@ const struct optdesc opt_so_debug = { "so-debug", "debug", OPT_SO_DEBUG,
const struct optdesc opt_so_acceptconn={ "so-acceptconn","acceptconn",OPT_SO_ACCEPTCONN,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_ACCEPTCONN};
#endif /* SO_ACCEPTCONN */
const struct optdesc opt_so_broadcast= { "so-broadcast", "broadcast", OPT_SO_BROADCAST,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_BROADCAST};
const struct optdesc opt_so_reuseaddr= { "so-reuseaddr", "reuseaddr", OPT_SO_REUSEADDR,GROUP_SOCKET, PH_PREBIND, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_REUSEADDR};
const struct optdesc opt_so_reuseaddr= { "so-reuseaddr", "reuseaddr", OPT_SO_REUSEADDR,GROUP_SOCKET, PH_PREBIND, TYPE_INT_NULL, OFUNC_SOCKOPT, SOL_SOCKET, SO_REUSEADDR};
const struct optdesc opt_so_keepalive= { "so-keepalive", "keepalive", OPT_SO_KEEPALIVE,GROUP_SOCKET, PH_FD, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_KEEPALIVE};
#if HAVE_STRUCT_LINGER
const struct optdesc opt_so_linger = { "so-linger", "linger", OPT_SO_LINGER, GROUP_SOCKET, PH_PASTSOCKET, TYPE_LINGER,OFUNC_SOCKOPT,SOL_SOCKET, SO_LINGER };
@ -2153,3 +2153,37 @@ int xiobind(
applyopts(xfd->fd, opts, PH_PASTBIND);
return 0;
}
/* Handles the SO_REUSEADDR socket option for TCP LISTEN addresses depending on
Socat option so-reuseaddr:
Option not applied: set it to 1
Option applied with a value: set it to the value
Option applied eith empty value "so-reuseaddr=": do not call setsockopt() for
SO_REUSEADDR
Return 0 on success, or -1 with errno when an error occurred.
*/
int xiosock_reuseaddr(int fd, int ipproto, struct opt *opts)
{
union integral val;
union integral notnull;
int _errno;
val.u_int = 0;
notnull.u_bool = false;
if (ipproto == IPPROTO_TCP) {
val.u_int = 1;
notnull.u_bool = true;
}
retropt_2integrals(opts, OPT_SO_REUSEADDR, &val, &notnull);
if (notnull.u_bool) {
if (Setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val.u_int, sizeof(int))
!= 0) {
_errno = errno;
Error4("setsockopt(%d, SOL_SOCKET, SO_REUSEADDR, { %d }, "F_Zu"): %s",
fd, val.u_int, sizeof(val.u_int), strerror(errno));
errno = _errno;
return -1;
}
}
return 0;
}