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gensio_osops.c
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gensio_osops.c
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/*
* gensio - A library for abstracting stream I/O
* Copyright (C) 2019 Corey Minyard <minyard@acm.org>
*
* SPDX-License-Identifier: LGPL-2.1-only
*/
#include "config.h"
#define _DEFAULT_SOURCE /* Get getgrouplist(), setgroups() */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#ifdef HAVE_TCPD_H
#include <tcpd.h>
#endif /* HAVE_TCPD_H */
#include <gensio/gensio.h>
#include <gensio/gensio_os_funcs.h>
#include <gensio/gensio_osops.h>
#include <gensio/gensio_class.h>
#include <gensio/argvutils.h>
#include <gensio/gensio_list.h>
#include "errtrig.h"
static const char *progname = "gensio";
bool gensio_set_progname(const char *iprogname)
{
progname = iprogname;
return true;
}
#ifdef _WIN32
#include <winsock2.h> /* For AF_UNSPEC */
#include <iphlpapi.h>
#else
#include <sys/socket.h>
#include <arpa/inet.h> /* For AF_UNSPEC */
#include <sys/types.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include <errno.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <net/if.h>
int
gensio_unix_os_setupnewprog(void)
{
struct passwd *pw;
int err;
uid_t uid = geteuid();
gid_t *groups = NULL;
int ngroup = 0;
if (do_errtrig())
return GE_NOMEM;
if (uid == getuid())
return 0;
err = seteuid(getuid());
if (err)
return errno;
pw = getpwuid(uid);
if (!pw)
return errno;
getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroup);
if (ngroup > 0) {
groups = malloc(sizeof(gid_t) * ngroup);
if (!groups)
return ENOMEM;
err = getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroup);
if (err == -1) {
err = errno;
free(groups);
return err;
}
err = setgroups(err, groups);
if (err) {
err = errno;
free(groups);
return err;
}
free(groups);
}
err = setgid(getegid());
if (err)
return errno;
err = setuid(uid);
if (err)
return errno;
return 0;
}
#endif
int
gensio_os_open_listen_sockets(struct gensio_os_funcs *o,
struct gensio_addr *addr,
void (*readhndlr)(struct gensio_iod *, void *),
void (*writehndlr)(struct gensio_iod *, void *),
void (*fd_handler_cleared)(struct gensio_iod *, void *),
int (*call_b4_listen)(struct gensio_iod *, void *),
void *data, unsigned int opensock_flags,
struct gensio_opensocks **rfds, unsigned int *rnr_fds)
{
struct gensio_opensocks *fds;
unsigned int nr_fds, i;
int rv;
rv = o->open_listen_sockets(o, addr, call_b4_listen, data,
opensock_flags, &fds, &nr_fds);
if (rv)
return rv;
for (i = 0; i < nr_fds; i++) {
rv = o->set_fd_handlers(fds[i].iod, data,
readhndlr, writehndlr, NULL,
fd_handler_cleared);
if (rv)
break;
}
if (!rv) {
*rfds = fds;
*rnr_fds = nr_fds;
return 0;
}
for (i = 0; i < nr_fds; i++) {
o->clear_fd_handlers_norpt(fds[i].iod);
o->close(&fds[i].iod);
}
o->free(o, fds);
return rv;
}
int
gensio_scan_network_port(struct gensio_os_funcs *o, const char *str,
bool listen, struct gensio_addr **raddr,
int *rprotocol,
bool *is_port_set,
int *rargc, const char ***rargs)
{
int err = 0, family = AF_UNSPEC, argc = 0;
const char **args = NULL;
bool doskip = true;
int protocol;
if (strncmp(str, "ipv4,", 5) == 0) {
family = AF_INET;
str += 5;
} else if (strncmp(str, "ipv6,", 5) == 0) {
#ifdef AF_INET6
family = AF_INET6;
str += 5;
#else
return GE_NOTSUP;
#endif
}
if (strncmp(str, "unix,", 4) == 0 ||
(rargs && strncmp(str, "unix(", 4) == 0)) {
if (family != AF_UNSPEC)
return GE_INVAL;
str += 4;
handle_unix:
protocol = GENSIO_NET_PROTOCOL_UNIX;
} else if (strncmp(str, "tcp,", 4) == 0 ||
(rargs && strncmp(str, "tcp(", 4) == 0)) {
str += 3;
handle_tcp:
protocol = GENSIO_NET_PROTOCOL_TCP;
} else if (strncmp(str, "udp,", 4) == 0 ||
(rargs && strncmp(str, "udp(", 4) == 0)) {
str += 3;
handle_udp:
protocol = GENSIO_NET_PROTOCOL_UDP;
} else if (strncmp(str, "sctp,", 5) == 0 ||
(rargs && strncmp(str, "sctp(", 5) == 0)) {
str += 4;
handle_sctp:
#if HAVE_LIBSCTP
protocol = GENSIO_NET_PROTOCOL_SCTP;
#else
return GE_NOTSUP;
#endif
} else if (rprotocol && *rprotocol != 0) {
doskip = false;
switch (*rprotocol) {
case GENSIO_NET_PROTOCOL_UNIX:
goto handle_unix;
case GENSIO_NET_PROTOCOL_TCP:
goto handle_tcp;
case GENSIO_NET_PROTOCOL_UDP:
goto handle_udp;
case GENSIO_NET_PROTOCOL_SCTP:
goto handle_sctp;
default:
goto default_protocol;
}
} else {
default_protocol:
doskip = false;
protocol = GENSIO_NET_PROTOCOL_TCP;
}
if (doskip) {
if (*str == '(') {
if (!rargs)
return GE_INVAL;
err = gensio_scan_args(o, &str, &argc, &args);
if (err)
return err;
} else if (*str != ',') {
return GE_INVAL;
} else {
str++; /* Skip the ',' */
}
}
err = o->addr_scan_ips(o, str, listen, family,
protocol, is_port_set, true, raddr);
if (err) {
if (args)
gensio_argv_free(o, args);
return err;
}
if (rargc)
*rargc = argc;
if (rargs)
*rargs = args;
if (rprotocol)
*rprotocol = protocol;
return 0;
}
int
gensio_scan_network_addr(struct gensio_os_funcs *o, const char *str,
int protocol, struct gensio_addr **raddr)
{
return o->addr_scan_ips(o, str, false, AF_UNSPEC, protocol,
NULL, false, raddr);
}
int
gensio_os_scan_netaddr(struct gensio_os_funcs *o, const char *str, bool listen,
int protocol, struct gensio_addr **raddr)
{
bool is_port_set;
struct gensio_addr *addr;
int rv;
rv = o->addr_scan_ips(o, str, listen, AF_UNSPEC,
protocol, &is_port_set, true, &addr);
if (!rv && !listen && !is_port_set &&
protocol != GENSIO_NET_PROTOCOL_UNIX) {
gensio_addr_free(addr);
rv = GE_INVAL;
} else if (!rv) {
*raddr = addr;
}
return rv;
}
void
gensio_os_free_net_ifs(struct gensio_os_funcs *o,
struct gensio_net_if **ifs, unsigned int nifs)
{
unsigned int i, j;
for (i = 0; i < nifs; i++) {
if (!ifs)
continue;
if (ifs[i]->name)
gensio_os_funcs_zfree(o, ifs[i]->name);
if (ifs[i]->addrs) {
for (j = 0; j < ifs[i]->naddrs; j++) {
if (ifs[i]->addrs[j].addrstr)
gensio_os_funcs_zfree(o, ifs[i]->addrs[j].addrstr);
}
gensio_os_funcs_zfree(o, ifs[i]->addrs);
}
gensio_os_funcs_zfree(o, ifs[i]);
}
gensio_os_funcs_zfree(o, ifs);
}
static bool
is_inet_family(struct sockaddr *s)
{
if (!s) /* This can happen on down interfaces. */
return false;
return (s->sa_family == AF_INET || s->sa_family == AF_INET6);
}
int
gensio_os_get_net_ifs(struct gensio_os_funcs *o,
struct gensio_net_if ***rifs, unsigned int *rnifs)
{
struct gensio_net_if **ifs = NULL;
char buf[100], *addrtype;
#ifdef _WIN32
IP_ADAPTER_ADDRESSES *t, *c, *p;
ULONG err;
unsigned int i, j, nifs;
ULONG buflen = 15 * 1024;
while (true) {
t = o->zalloc(o, buflen);
if (!t)
return GE_NOMEM;
err = GetAdaptersAddresses(AF_UNSPEC,
(GAA_FLAG_SKIP_ANYCAST |
GAA_FLAG_SKIP_MULTICAST |
GAA_FLAG_SKIP_DNS_SERVER |
GAA_FLAG_SKIP_FRIENDLY_NAME),
NULL, t, &buflen);
if (err == NO_ERROR)
break;
o->free(o, t);
if (err == ERROR_BUFFER_OVERFLOW) {
/* Just retry */
} else if (err == ERROR_NOT_ENOUGH_MEMORY) {
return GE_NOMEM;
} else {
return GE_OSERR;
}
}
i = 0;
for (c = t; c; c = c->Next) {
if (c->IfIndex != c->Ipv6IfIndex && c->Ipv6IfIndex != 0)
continue; /* FIXME - Not sure what to do with these. */
i++;
}
nifs = i;
ifs = gensio_os_funcs_zalloc(o, sizeof(*ifs) * (nifs + 1));
if (!ifs)
goto out_err;
i = 0;
for (c = t; c; c = c->Next) {
IP_ADAPTER_UNICAST_ADDRESS *al;
unsigned int slen;
size_t rlen;
if (c->IfIndex != c->Ipv6IfIndex && c->Ipv6IfIndex != 0)
continue; /* FIXME - Not sure what to do with these. */
ifs[i] = gensio_os_funcs_zalloc(o, sizeof(**ifs));
if (!ifs[i])
goto out_err;
ifs[i]->ifindex = c->IfIndex;
if (c->IfType == IF_TYPE_SOFTWARE_LOOPBACK)
ifs[i]->flags |= GENSIO_NET_IF_LOOPBACK;
if (c->OperStatus == IfOperStatusUp)
ifs[i]->flags |= GENSIO_NET_IF_UP;
if (!c->NoMulticast)
ifs[i]->flags |= GENSIO_NET_IF_MULTICAST;
slen = wcslen(c->FriendlyName) * 2;
ifs[i]->name = o->zalloc(o, slen + 1);
if (!ifs[i]->name)
goto out_err;
wcstombs_s(&rlen, ifs[i]->name, slen + 1, c->FriendlyName, slen);
for (j = 0, al = c->FirstUnicastAddress; al; j++, al = al->Next)
;
ifs[i]->addrs = o->zalloc(o, sizeof(struct gensio_net_addr) * j);
if (!ifs[i]->addrs)
goto out_err;
for (j = 0, al = c->FirstUnicastAddress; al; al = al->Next) {
struct sockaddr *a = (void *) al->Address.lpSockaddr;
if (a->sa_family == AF_INET) {
struct sockaddr_in *ia = (void *) a;
ifs[i]->addrs[j].family = GENSIO_NETTYPE_IPV4;
ifs[i]->addrs[j].netbits = al->OnLinkPrefixLength;
ifs[i]->addrs[j].addrlen = 4;
memcpy(ifs[i]->addrs[j].addr, &ia->sin_addr, 4);
addrtype = "ipv4:";
} else if (a->sa_family == AF_INET6) {
struct sockaddr_in6 *ia = (void *) a;
ifs[i]->addrs[j].family = GENSIO_NETTYPE_IPV6;
ifs[i]->addrs[j].netbits = al->OnLinkPrefixLength;
ifs[i]->addrs[j].addrlen = 16;
memcpy(ifs[i]->addrs[j].addr, &ia->sin6_addr, 16);
addrtype = "ipv6:";
} else {
continue;
}
memcpy(buf, addrtype, 5);
inet_ntop(a->sa_family, ifs[i]->addrs[j].addr,
buf + 5, sizeof(buf) - 5);
ifs[i]->addrs[j].addrstr = gensio_strdup(o, buf);
if (!ifs[i]->addrs[j].addrstr)
goto out_err;
j++;
}
ifs[i]->naddrs = j;
i++;
assert(i <= nifs);
}
o->free(o, t);
*rifs = ifs;
*rnifs = i;
return 0;
out_err:
o->free(o, t);
if (ifs)
gensio_os_free_net_ifs(o, ifs, nifs);
return GE_NOMEM;
#else
struct ifaddrs *ifap, *ifp, *ifp2;
unsigned int i, j, k, nifs = 0, naddrs, addrlen, nbits;
unsigned char *addr, *netmask;
int rv;
bool found;
rv = getifaddrs(&ifap);
if (rv) {
rv = gensio_os_err_to_err(o, errno);
return rv;
}
/* Count the number of unique interfaces by name. */
for (ifp = ifap; ifp; ifp = ifp->ifa_next) {
if (!is_inet_family(ifp->ifa_addr))
continue;
found = false;
for (ifp2 = ifap; ifp2 != ifp; ifp2 = ifp2->ifa_next) {
if (!is_inet_family(ifp2->ifa_addr))
continue;
if (strcmp(ifp2->ifa_name, ifp->ifa_name) == 0) {
found = true;
break;
}
}
if (found)
continue;
nifs++;
}
rv = GE_NOMEM;
ifs = gensio_os_funcs_zalloc(o, sizeof(*ifs) * (nifs + 1));
if (!ifs)
goto out_err;
for (ifp = ifap; ifp; ifp = ifp->ifa_next) {
if (!is_inet_family(ifp->ifa_addr))
continue;
for (i = 0; i < nifs && ifs[i]; i++) {
if (strcmp(ifs[i]->name, ifp->ifa_name) == 0)
break;
}
if (!ifs[i]) {
/*
* First occurence of this name, allocate info and the
* if address array.
*/
ifs[i] = gensio_os_funcs_zalloc(o, sizeof(**ifs));
if (!ifs[i])
goto out_err;
ifs[i]->name = gensio_strdup(o, ifp->ifa_name);
if (!ifs[i]->name)
goto out_err;
ifs[i]->ifindex = if_nametoindex(ifp->ifa_name);
if (!ifs[i]->ifindex) {
rv = gensio_os_err_to_err(o, errno);
goto out_err;
}
/* Count the number of addresses for this interface. */
naddrs = 1;
for (ifp2 = ifp->ifa_next; ifp2; ifp2 = ifp2->ifa_next) {
if (!is_inet_family(ifp2->ifa_addr))
continue;
if (strcmp(ifp2->ifa_name, ifp->ifa_name) == 0)
naddrs++;
}
ifs[i]->addrs = gensio_os_funcs_zalloc(o,
naddrs * sizeof(struct gensio_net_addr));
if (!ifs[i]->addrs)
goto out_err;
}
if (ifp->ifa_flags & IFF_UP)
ifs[i]->flags |= GENSIO_NET_IF_UP;
if (ifp->ifa_flags & IFF_LOOPBACK)
ifs[i]->flags |= GENSIO_NET_IF_LOOPBACK;
if (ifp->ifa_flags & IFF_MULTICAST)
ifs[i]->flags |= GENSIO_NET_IF_MULTICAST;
if (ifp->ifa_addr->sa_family == AF_INET) {
struct sockaddr_in *s;
s = (struct sockaddr_in *) ifp->ifa_addr;
addr = (unsigned char *) &s->sin_addr;
s = (struct sockaddr_in *) ifp->ifa_netmask;
netmask = (unsigned char *) &s->sin_addr;
addrlen = 4;
addrtype = "ipv4:";
} else {
struct sockaddr_in6 *s;
s = (struct sockaddr_in6 *) ifp->ifa_addr;
addr = s->sin6_addr.s6_addr;
s = (struct sockaddr_in6 *) ifp->ifa_netmask;
netmask = s->sin6_addr.s6_addr;
addrlen = 16;
addrtype = "ipv6:";
}
j = (ifs[i]->naddrs)++;
memcpy(ifs[i]->addrs[j].addr, addr, addrlen);
ifs[i]->addrs[j].addrlen = addrlen;
if (ifp->ifa_addr->sa_family == AF_INET)
ifs[i]->addrs[j].family = GENSIO_NETTYPE_IPV4;
else
ifs[i]->addrs[j].family = GENSIO_NETTYPE_IPV6;
for (nbits = 0, k = 0; k < addrlen && netmask[k] == 0xff; k++)
nbits += 8;
if (k < addrlen) {
unsigned char v = netmask[k];
while (v & 0xff) {
if (v & 0x80)
nbits++;
else
break;
v <<= 1;
}
}
ifs[i]->addrs[j].netbits = nbits;
memcpy(buf, addrtype, 5);
inet_ntop(ifp->ifa_addr->sa_family, addr, buf + 5, sizeof(buf) - 5);
ifs[i]->addrs[j].addrstr = gensio_strdup(o, buf);
if (!ifs[i]->addrs[j].addrstr)
goto out_err;
}
freeifaddrs(ifap);
*rifs = ifs;
*rnifs = nifs;
return 0;
out_err:
freeifaddrs(ifap);
if (ifs)
gensio_os_free_net_ifs(o, ifs, nifs);
return rv;
#endif
}
const char *
gensio_os_check_tcpd_ok(struct gensio_iod *iod, const char *iprogname)
{
#ifdef HAVE_TCPD_H
struct request_info req;
if (!iprogname)
iprogname = progname;
request_init(&req, RQ_DAEMON, iprogname, RQ_FILE,
iod->f->iod_get_fd(iod), NULL);
fromhost(&req);
if (!hosts_access(&req))
return "Access denied\r\n";
#endif
return NULL;
}
/*
* Serial port handling.
*/
#include <gensio/sergensio.h>
#ifdef _WIN32
struct stdio_mode {
DWORD old_mode_flags;
};
int
gensio_win_stdin_makeraw(struct gensio_os_funcs *o, HANDLE h,
struct stdio_mode **rm)
{
DWORD mode, omode;
struct stdio_mode *m = NULL;
if (!GetConsoleMode(h, &omode))
return GE_NOTSUP;
if (!*rm) {
m = o->zalloc(o, sizeof(*m));
if (!m)
return GE_NOMEM;
m->old_mode_flags = omode;
}
mode = omode & ~(ENABLE_LINE_INPUT |
ENABLE_INSERT_MODE |
ENABLE_ECHO_INPUT |
ENABLE_PROCESSED_INPUT);
mode |= ENABLE_WINDOW_INPUT | ENABLE_VIRTUAL_TERMINAL_INPUT;
if (!SetConsoleMode(h, mode)) {
if (m)
o->free(o, m);
return gensio_os_err_to_err(o, GetLastError());
}
if (m)
*rm = m;
return 0;
}
int
gensio_win_stdout_makeraw(struct gensio_os_funcs *o, HANDLE h,
struct stdio_mode **rm)
{
DWORD mode, omode;
struct stdio_mode *m = NULL;
if (!GetConsoleMode(h, &omode))
return GE_NOTSUP;
if (!*rm) {
m = o->zalloc(o, sizeof(*m));
if (!m)
return GE_NOMEM;
m->old_mode_flags = omode;
}
mode = omode;
mode |= (ENABLE_PROCESSED_OUTPUT | ENABLE_VIRTUAL_TERMINAL_PROCESSING
| ENABLE_WRAP_AT_EOL_OUTPUT);
if (!SetConsoleMode(h, mode)) {
if (m)
o->free(o, m);
return gensio_os_err_to_err(o, GetLastError());
}
if (m)
*rm = m;
return 0;
}
void
gensio_win_stdio_cleanup(struct gensio_os_funcs *o, HANDLE h,
struct stdio_mode **m)
{
if (!*m)
return;
SetConsoleMode(h, (*m)->old_mode_flags);
o->free(o, *m);
*m = NULL;
}
struct gensio_win_commport
{
BOOL orig_dcb_set;
DCB orig_dcb;
DCB curr_dcb;
BOOL orig_timeouts_set;
COMMTIMEOUTS orig_timeouts;
BOOL hupcl; /* FIXME - implement this. */
BOOL break_set;
BOOL dtr_set;
BOOL rts_set;
BOOL break_timer_running;
HANDLE break_timer;
};
int
gensio_win_setup_commport(struct gensio_os_funcs* o, HANDLE h,
struct gensio_win_commport** rc, HANDLE* break_timer)
{
DCB* t;
COMMTIMEOUTS timeouts;
int rv = 0;
struct gensio_win_commport* c;
if (*rc)
return GE_INUSE;
c = o->zalloc(o, sizeof(*c));
if (!c)
return GE_NOMEM;
t = &c->curr_dcb;
if (!GetCommTimeouts(h, &c->orig_timeouts))
goto out_err;
c->orig_timeouts_set = TRUE;
timeouts.ReadIntervalTimeout = 1;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
if (!SetCommTimeouts(h, &timeouts))
goto out_err;
if (!GetCommState(h, &c->orig_dcb))
goto out_err;
c->orig_dcb_set = TRUE;
*t = c->orig_dcb;
t->fBinary = TRUE;
t->BaudRate = 9600;
t->fParity = NOPARITY;
t->fDtrControl = DTR_CONTROL_ENABLE;
t->fDsrSensitivity = TRUE;
t->fTXContinueOnXoff = FALSE;
t->fOutX = FALSE;
t->fInX = FALSE;
t->fErrorChar = FALSE;
t->fNull = FALSE;
t->fRtsControl = RTS_CONTROL_ENABLE;
t->fOutxCtsFlow = FALSE;
t->fAbortOnError = FALSE;
t->XonLim = 50;
t->XoffLim = 50;
t->ByteSize = 8;
t->StopBits = ONESTOPBIT;
if (!SetCommState(h, &c->curr_dcb))
goto out_err;
/* FIXME - Can the following be restored? */
if (!EscapeCommFunction(h, CLRBREAK))
goto out_err;
c->break_set = FALSE;
if (!EscapeCommFunction(h, CLRRTS))
goto out_err;
c->rts_set = FALSE;
if (!EscapeCommFunction(h, CLRDTR))
goto out_err;
c->dtr_set = FALSE;
/* Break timer */
c->break_timer = CreateWaitableTimer(NULL, FALSE, NULL);
if (!c->break_timer) {
rv = GE_NOMEM;
} else {
*break_timer = c->break_timer;
*rc = c;
}
return rv;
out_err:
return gensio_os_err_to_err(o, GetLastError());
}
DWORD
gensio_win_commport_break_done(struct gensio_os_funcs *o, HANDLE h,
struct gensio_win_commport **c)
{
if (!(*c)->break_set)
if (!EscapeCommFunction(h, CLRBREAK))
return GetLastError();
(*c)->break_timer_running = FALSE;
return 0;
}
void
gensio_win_cleanup_commport(struct gensio_os_funcs *o, HANDLE h,
struct gensio_win_commport **c)
{
if (!*c)
return;
CloseHandle((*c)->break_timer);
if ((*c)->orig_dcb_set)
SetCommState(h, &(*c)->orig_dcb);
if ((*c)->orig_timeouts_set)
SetCommTimeouts(h, &(*c)->orig_timeouts);
o->free(o, *c);
*c = NULL;
}
int
gensio_win_commport_control(struct gensio_os_funcs *o, int op, bool get,
intptr_t val,
struct gensio_win_commport **c, HANDLE h)
{
DCB *t = &(*c)->curr_dcb;
int rv = 0;
switch (op) {
case GENSIO_IOD_CONTROL_SERDATA:
if (get) {
t = o->zalloc(o, sizeof(*t));
if (!t) {
rv = GE_NOMEM;
} else {
*t = (*c)->curr_dcb;
*((void **) val) = t;
}
} else {
(*c)->curr_dcb = *((DCB *) val);
}
break;
case GENSIO_IOD_CONTROL_FREE_SERDATA:
o->free(o, (void *) val);
break;
case GENSIO_IOD_CONTROL_BAUD:
if (get)
*((int *) val) = t->BaudRate;
else
t->BaudRate = val;
break;
case GENSIO_IOD_CONTROL_PARITY:
if (get) {
if (t->fParity) {
switch (t->Parity) {
case NOPARITY: *((int *) val) = SERGENSIO_PARITY_NONE; break;
case EVENPARITY: *((int *) val) = SERGENSIO_PARITY_EVEN; break;
case ODDPARITY: *((int *) val) = SERGENSIO_PARITY_ODD; break;
case MARKPARITY: *((int *) val) = SERGENSIO_PARITY_MARK; break;
case SPACEPARITY:
*((int *) val) = SERGENSIO_PARITY_SPACE;
break;
default:
rv = GE_IOERR;
}
} else {
*((int *) val) = SERGENSIO_PARITY_NONE;
}
} else {
t->fParity = 1;
switch (val) {
case SERGENSIO_PARITY_NONE:
t->fParity = 0;
t->Parity = NOPARITY;
break;
case SERGENSIO_PARITY_EVEN: t->Parity = EVENPARITY; break;
case SERGENSIO_PARITY_ODD: t->Parity = ODDPARITY; break;
case SERGENSIO_PARITY_MARK: t->Parity = MARKPARITY; break;
case SERGENSIO_PARITY_SPACE: t->Parity = SPACEPARITY; break;
default:
rv = GE_INVAL;
}
}
break;
case GENSIO_IOD_CONTROL_XONXOFF:
if (get)
*((int *) val) = t->fOutX;
else {
t->XonChar = 17;
t->XoffChar = 19;
t->fOutX = !!val;
}
break;
case GENSIO_IOD_CONTROL_RTSCTS:
if (get) {
*((int *) val) = t->fOutxCtsFlow;
} else {
t->fOutxCtsFlow = !!val;
if (val)
t->fRtsControl = RTS_CONTROL_HANDSHAKE;
}
break;
case GENSIO_IOD_CONTROL_DATASIZE:
if (get)
*((int *) val) = t->ByteSize;
else
t->ByteSize = val;
break;
case GENSIO_IOD_CONTROL_STOPBITS:
if (get) {
switch (t->StopBits) {
case ONESTOPBIT: *((int *) val) = 1; break;
case TWOSTOPBITS: *((int *) val) = 2; break;
default:
rv = GE_INVAL;
}
} else {
switch (val) {
case 1: t->StopBits = ONESTOPBIT; break;
case 2: t->StopBits = TWOSTOPBITS; break;
default:
rv = GE_INVAL;
}
}
break;
case GENSIO_IOD_CONTROL_LOCAL:
if (get)
*((int *) val) = t->fDsrSensitivity;
else
t->fDsrSensitivity = val;
break;
case GENSIO_IOD_CONTROL_HANGUP_ON_DONE:
if (get) {
*((int *) val) = (*c)->hupcl;
} else {
(*c)->hupcl = val;
}
break;
case GENSIO_IOD_CONTROL_RS485:
rv = GE_NOTSUP;
break;
case GENSIO_IOD_CONTROL_IXONXOFF:
if (get) {
*((int *) val) = t->fInX;
} else {
t->fInX = !!val;
t->XonChar = 17;
t->XoffChar = 19;
}
break;
case GENSIO_IOD_CONTROL_APPLY:
if (!SetCommState(h, &(*c)->curr_dcb))
goto out_err;
break;
case GENSIO_IOD_CONTROL_SET_BREAK:
if (get) {
*((int *) val) = (*c)->break_set;
} else {
if (val) {
if (!EscapeCommFunction(h, SETBREAK))
goto out_err;
} else {
if (!EscapeCommFunction(h, CLRBREAK))
goto out_err;
}
(*c)->break_set = val;
}
break;
case GENSIO_IOD_CONTROL_SEND_BREAK:
if (!((*c)->break_set || (*c)->break_timer_running)) {
LARGE_INTEGER timeout;
/* .25 seconds. */
timeout.QuadPart = 2500000LL;
if (!EscapeCommFunction(h, SETBREAK))
goto out_err;
if (!SetWaitableTimer((*c)->break_timer, &timeout,
0, NULL, NULL, 0)) {
EscapeCommFunction(h, CLRBREAK);
goto out_err;
}
(*c)->break_timer_running = true;
}
break;
case GENSIO_IOD_CONTROL_DTR:
if (get) {
*((int *) val) = (*c)->dtr_set;
} else {
if (val) {
if (!EscapeCommFunction(h, SETDTR))
goto out_err;
} else {
if (!EscapeCommFunction(h, CLRDTR))
goto out_err;
}
(*c)->dtr_set = val;
}
break;
case GENSIO_IOD_CONTROL_RTS: