static int xioopen_unix_connect(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xxfd, unsigned groups, int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
struct single *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_STREAM;
int protocol = 0;
struct sockaddr_un them, us;
socklen_t themlen, uslen;
bool tight = true;
bool needbind = false;
bool opt_unlink_close = false;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
xfd->howtoend = END_SHUTDOWN;
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
themlen = xiosetunix(pf, &them, name, abstract, tight);
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
if (retropt_bind(opts, pf, socktype, protocol, (struct sockaddr *)&us, &uslen, 0, 0, 0)
!= STAT_NOACTION) {
needbind = true;
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
applyopts(-1, opts, PH_EARLY);
if ((result =
xioopen_connect(xfd,
needbind?(struct sockaddr *)&us:NULL, uslen,
(struct sockaddr *)&them, themlen,
opts, pf, socktype, protocol, false)) != 0) {
return result;
}
if ((result = _xio_openlate(xfd, opts)) < 0) {
return result;
}
return STAT_OK;
}
static int xioopen_unix_sendto(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xxfd, unsigned groups, int abstract, int dummy, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_DGRAM;
int protocol = 0;
union sockaddr_union us;
socklen_t uslen;
bool tight = true;
bool needbind = false;
bool opt_unlink_close = false;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
name = argv[1];
retropt_socket_pf(opts, &pf);
xfd->salen = xiosetunix(pf, &xfd->peersa.un, name, abstract, tight);
xfd->howtoend = END_SHUTDOWN;
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
xfd->dtype = XIODATA_RECVFROM;
if (retropt_bind(opts, pf, socktype, protocol, &us.soa, &uslen, 0, 0, 0)
!= STAT_NOACTION) {
needbind = true;
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
return
_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
opts, xioflags, xfd, groups,
pf, socktype, protocol);
}
/* establishes communication with an existing UNIX type socket. supports stream
and datagram socket types: first tries to connect(), but when this fails it
falls back to sendto().
applies and consumes the following option:
PH_INIT, PH_PASTSOCKET, PH_FD, PH_PREBIND, PH_BIND, PH_PASTBIND,
PH_CONNECTED, PH_LATE, ?PH_CONNECT
OFUNC_OFFSET,
OPT_PROTOCOL_FAMILY, OPT_UNIX_TIGHTSOCKLEN, OPT_UNLINK_CLOSE, OPT_BIND,
OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_CLOEXEC, OPT_USER, OPT_GROUP, ?OPT_FORK,
*/
int
_xioopen_unix_client(xiosingle_t *xfd, int xioflags, unsigned groups,
int abstract, struct opt *opts, const char *name) {
int pf = PF_UNIX;
int socktype = 0; /* to be determined by server socket type */
int protocol = 0;
union sockaddr_union them, us;
socklen_t themlen, uslen;
bool tight = true;
bool needbind = false;
bool opt_unlink_close = false;
struct opt *opts0;
int result;
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
xfd->howtoend = END_SHUTDOWN;
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
themlen = xiosetunix(pf, &them.un, name, abstract, tight);
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
if (retropt_bind(opts, pf, socktype, protocol, &us.soa, &uslen, 0, 0, 0)
!= STAT_NOACTION) {
needbind = true;
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
/* save options, because we might have to start again */
opts0 = copyopts(opts, GROUP_ALL);
/* xfd->dtype = DATA_STREAM; // is default */
if ((result =
xioopen_connect(xfd,
needbind?(struct sockaddr *)&us:NULL, uslen,
(struct sockaddr *)&them, themlen,
opts, pf, socktype?socktype:SOCK_STREAM, protocol,
false)) != 0) {
if (errno == EPROTOTYPE) {
if (needbind) {
Unlink(us.un.sun_path);
}
dropopts2(opts, PH_INIT, PH_SPEC); opts = opts0;
xfd->peersa = them;
xfd->salen = sizeof(struct sockaddr_un);
if ((result =
_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
opts, xioflags, xfd, groups,
pf, socktype?socktype:SOCK_DGRAM, protocol))
!= 0) {
return result;
}
xfd->dtype = XIODATA_RECVFROM;
}
}
if ((result = _xio_openlate(xfd, opts)) < 0) {
return result;
}
return 0;
}
static
int xioopen_unix_recv(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd, unsigned groups,
int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_DGRAM;
int protocol = 0;
union sockaddr_union us;
socklen_t uslen;
bool tight = true;
bool opt_unlink_early = false;
bool opt_unlink_close = true;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
uslen = xiosetunix(pf, &us.un, name, abstract, tight);
#if 1 /*!!! why bind option? */
retropt_bind(opts, pf, socktype, protocol, &us.soa, &uslen, 1, 0, 0);
#endif
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
}
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
xfd->para.socket.la.soa.sa_family = pf;
xfd->dtype = XIODATA_RECV;
result = _xioopen_dgram_recv(xfd, xioflags, &us.soa, uslen,
opts, pf, socktype, protocol, E_ERROR);
return result;
}
static int xioopen_unix_listen(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xxfd, unsigned groups, int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_STREAM;
int protocol = 0;
struct sockaddr_un us;
socklen_t uslen;
bool tight = true;
struct opt *opts0 = NULL;
pid_t pid = Getpid();
bool opt_unlink_early = false;
bool opt_unlink_close = true;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
uslen = xiosetunix(pf, &us, name, abstract, tight);
xfd->howtoend = END_SHUTDOWN;
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
applyopts(-1, opts, PH_INIT);
applyopts(-1, opts, PH_EARLY);
if (!(ABSTRACT && abstract)) {
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
}
/* trying to set user-early, perm-early etc. here is useless because
file system entry is available only past bind() call. */
applyopts_named(name, opts, PH_EARLY); /* umask! */
}
opts0 = copyopts(opts, GROUP_ALL);
if ((result =
xioopen_listen(xfd, xioflags,
(struct sockaddr *)&us, uslen,
opts, opts0, pf, socktype, protocol))
!= 0)
return result;
/* we set this option as late as now because we should not remove an
existing entry when bind() failed */
if (!(ABSTRACT && abstract)) {
if (opt_unlink_close) {
if (pid == Getpid()) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
}
return 0;
}
static
int xioopen_unix_recvfrom(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd, unsigned groups,
int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_DGRAM;
int protocol = 0;
struct sockaddr_un us;
socklen_t uslen;
bool tight = true;
bool needbind = true;
bool opt_unlink_early = false;
bool opt_unlink_close = true;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
uslen = xiosetunix(pf, &us, name, abstract, tight);
xfd->howtoend = END_NONE;
retropt_bind(opts, pf, socktype, protocol, (struct sockaddr *)&us, &uslen,
1, 0, 0);
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
if (!(ABSTRACT && abstract)) {
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
} else {
struct stat buf;
if (Lstat(name, &buf) == 0) {
Error1("\"%s\" exists", name);
return STAT_RETRYLATER;
}
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
/* trying to set user-early, perm-early etc. here is useless because
file system entry is available only past bind() call. */
}
applyopts_named(name, opts, PH_EARLY); /* umask! */
xfd->para.socket.la.soa.sa_family = pf;
xfd->dtype = XIODATA_RECVFROM_ONE;
/* this may fork */
return
_xioopen_dgram_recvfrom(xfd, xioflags,
needbind?(struct sockaddr *)&us:NULL, uslen,
opts, pf, socktype, protocol, E_ERROR);
}
static
int xioopen_unix_recv(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd, unsigned groups,
int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_DGRAM;
int protocol = 0;
union sockaddr_union us;
socklen_t uslen;
bool opt_unlink_early = false;
bool opt_unlink_close = true;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
xfd->para.socket.un.tight = true;
retropt_socket_pf(opts, &pf);
xfd->howtoend = END_SHUTDOWN;
if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
applyopts(-1, opts, PH_INIT);
applyopts_named(name, opts, PH_EARLY); /* umask! */
applyopts_offset(xfd, opts);
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
applyopts(-1, opts, PH_EARLY);
uslen = xiosetunix(pf, &us.un, name, abstract, xfd->para.socket.un.tight);
#if 0
if (retropt_bind(opts, pf, socktype, protocol, &us.soa, &uslen,
(abstract<<1)|xfd->para.socket.un.tight, 0, 0)
== STAT_OK) {
}
#endif
if (!(ABSTRACT && abstract)) {
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
} else {
struct stat buf;
if (Lstat(name, &buf) == 0) {
Error1("\"%s\" exists", name);
return STAT_RETRYLATER;
}
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
applyopts_named(name, opts, PH_EARLY); /* umask! */
xfd->para.socket.la.soa.sa_family = pf;
xfd->dtype = XIODATA_RECV;
result = _xioopen_dgram_recv(xfd, xioflags, &us.soa, uslen,
opts, pf, socktype, protocol, E_ERROR);
return result;
}