static u_int32_t default_route_gateway; /* Gateway for default route added */
static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
static char proxy_arp_dev[16]; /* Device for proxy arp entry */
+static u_int32_t our_old_addr; /* for detecting address changes */
+static int dynaddr_set; /* 1 if ip_dynaddr set */
+static int looped; /* 1 if using loop */
static struct utsname utsname; /* for the kernel version */
static int kernel_version;
#define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \
IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP)
+#define SIN_ADDR(x) (((struct sockaddr_in *) (&(x)))->sin_addr.s_addr)
+
/* Prototypes for procedures local to this file. */
static int get_flags (int fd);
static void set_flags (int fd, int flags);
/*
* Demand mode - prime the old ppp device to relinquish the unit.
*/
- if (!new_style_driver && demand
+ if (!new_style_driver && looped
&& ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0)
fatal("ioctl(transfer ppp unit): %m(%d)", errno);
/*
* Find out which interface we were given.
*/
if (new_style_driver) {
- if (!demand) {
+ if (!looped) {
/* allocate ourselves a ppp unit */
ifunit = -1;
if (ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit) < 0)
fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno);
}
/* Check that we got the same unit again. */
- if (demand && x != ifunit)
+ if (looped && x != ifunit)
fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
ifunit = x;
}
/*
* Enable debug in the driver if requested.
*/
- if (!demand)
+ if (!looped)
set_kdebugflag (kdebugflag);
+ looped = 0;
set_flags(tty_fd, get_flags(tty_fd) & ~(SC_RCV_B7_0 | SC_RCV_B7_1 |
SC_RCV_EVNP | SC_RCV_ODDP));
}
}
initfdflags = -1;
- if (new_style_driver)
+ if (new_style_driver && !looped) {
+ if (ioctl(ppp_dev_fd, PPPIOCDETACH) < 0) {
+ if (errno == ENOTTY) {
+ /* first version of new driver didn't have PPPIOCDETACH */
+ int flags;
+
+ close(ppp_dev_fd);
+ ppp_dev_fd = open("/dev/ppp", O_RDWR);
+ if (ppp_dev_fd < 0)
+ fatal("Couldn't reopen /dev/ppp: %m");
+ flags = fcntl(ppp_dev_fd, F_GETFL);
+ if (flags == -1
+ || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("Couldn't set /dev/ppp to nonblock: %m");
+ } else
+ error("Couldn't release PPP unit: %m");
+ }
set_ppp_fd(-1);
+ }
}
/********************************************************************
p = NULL;
}
- ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
- strtoul(cols[route_dest_col], NULL, 16);
-
- ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
- strtoul(cols[route_gw_col], NULL, 16);
-
- ((struct sockaddr_in *) &rt->rt_genmask)->sin_addr.s_addr =
- strtoul(cols[route_mask_col], NULL, 16);
+ SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
+ SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
+ SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16);
rt->rt_dev = cols[route_dev_col];
if ((rt->rt_flags & RTF_UP) == 0)
continue;
- if (((struct sockaddr_in *) (&rt->rt_dst))->sin_addr.s_addr == 0L) {
+ if (kernel_version > KVERSION(2,1,0) && SIN_ADDR(rt->rt_genmask) != 0)
+ continue;
+ if (SIN_ADDR(rt->rt_dst) == 0L) {
result = 1;
break;
}
while (read_route_table(&rt)) {
if ((rt.rt_flags & RTF_UP) == 0 || strcmp(rt.rt_dev, ifname) == 0)
continue;
- if ((addr & ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr)
- == ((struct sockaddr_in *)&rt.rt_dst)->sin_addr.s_addr) {
+ if ((addr & SIN_ADDR(rt.rt_genmask)) == SIN_ADDR(rt.rt_dst)) {
result = 1;
break;
}
struct rtentry rt;
if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
- struct in_addr old_gateway =
- ((struct sockaddr_in *) (&rt.rt_gateway))-> sin_addr;
+ u_int32_t old_gateway = SIN_ADDR(rt.rt_gateway);
- if (old_gateway.s_addr != gateway)
+ if (old_gateway != gateway)
error("not replacing existing default route to %s [%I]",
rt.rt_dev, old_gateway);
return 0;
if (kernel_version > KVERSION(2,1,0)) {
SET_SA_FAMILY (rt.rt_genmask, AF_INET);
- ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
+ SIN_ADDR(rt.rt_genmask) = 0L;
}
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
+ SIN_ADDR(rt.rt_gateway) = gateway;
rt.rt_flags = RTF_UP | RTF_GATEWAY;
if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
if (kernel_version > KVERSION(2,1,0)) {
SET_SA_FAMILY (rt.rt_genmask, AF_INET);
- ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
+ SIN_ADDR(rt.rt_genmask) = 0L;
}
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
+ SIN_ADDR(rt.rt_gateway) = gateway;
rt.rt_flags = RTF_UP | RTF_GATEWAY;
if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
memset (&arpreq, '\0', sizeof(arpreq));
SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
+ SIN_ADDR(arpreq.arp_pa) = his_adr;
arpreq.arp_flags = ATF_PERM | ATF_PUBL;
/*
* Get the hardware address of an interface on the same subnet
proxy_arp_addr = his_adr;
has_proxy_arp = 1;
- forw_path = path_to_procfs("/sys/net/ipv4/ip_forward");
- if (forw_path != 0) {
- int fd = open(forw_path, O_WRONLY);
- if (fd >= 0) {
- write(fd, "1", 1);
- close(fd);
+ if (tune_kernel) {
+ forw_path = path_to_procfs("/sys/net/ipv4/ip_forward");
+ if (forw_path != 0) {
+ int fd = open(forw_path, O_WRONLY);
+ if (fd >= 0) {
+ if (write(fd, "1", 1) != 1)
+ error("Couldn't enable IP forwarding: %m");
+ close(fd);
+ }
}
}
}
has_proxy_arp = 0;
memset (&arpreq, '\0', sizeof(arpreq));
SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
+ SIN_ADDR(arpreq.arp_pa) = his_adr;
arpreq.arp_flags = ATF_PERM | ATF_PUBL;
strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
if (ifr->ifr_addr.sa_family == AF_INET) {
- ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ ina = SIN_ADDR(ifr->ifr_addr);
strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
ifreq.ifr_name));
if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
continue;
- mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
+ mask = SIN_ADDR(ifreq.ifr_addr);
SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
ip_ntoa(ina), ntohl(mask)));
*/
if (ifr->ifr_addr.sa_family != AF_INET)
continue;
- ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ ina = SIN_ADDR(ifr->ifr_addr);
if (((ntohl(ina) ^ addr) & nmask) != 0)
continue;
/*
*/
if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
continue;
- mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
+ mask |= SIN_ADDR(ifreq.ifr_addr);
break;
}
return mask;
/*
* Set our IP address
*/
- ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr;
+ SIN_ADDR(ifr.ifr_addr) = our_adr;
if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
if (errno != EEXIST) {
if (! ok_error (errno))
/*
* Set the gateway address
*/
- ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr;
+ SIN_ADDR(ifr.ifr_dstaddr) = his_adr;
if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
if (! ok_error (errno))
error("ioctl(SIOCSIFDSTADDR): %m(%d)", errno);
if (kernel_version >= KVERSION(2,1,16))
net_mask = ~0L;
if (net_mask != 0) {
- ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
+ SIN_ADDR(ifr.ifr_netmask) = net_mask;
if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
if (! ok_error (errno))
error("ioctl(SIOCSIFNETMASK): %m(%d)", errno);
SET_SA_FAMILY (rt.rt_gateway, AF_INET);
rt.rt_dev = ifname;
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L;
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
+ SIN_ADDR(rt.rt_gateway) = 0L;
+ SIN_ADDR(rt.rt_dst) = his_adr;
rt.rt_flags = RTF_UP | RTF_HOST;
if (kernel_version > KVERSION(2,1,0)) {
SET_SA_FAMILY (rt.rt_genmask, AF_INET);
- ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
+ SIN_ADDR(rt.rt_genmask) = -1L;
}
if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
return (0);
}
}
+
+ /* set ip_dynaddr in demand mode if address changes */
+ if (demand && tune_kernel && !dynaddr_set
+ && our_old_addr && our_old_addr != our_adr) {
+ /* set ip_dynaddr if possible */
+ char *path;
+ int fd;
+
+ path = path_to_procfs("/sys/net/ipv4/ip_dynaddr");
+ if (path != 0 && (fd = open(path, O_WRONLY)) >= 0) {
+ if (write(fd, "1", 1) != 1)
+ error("Couldn't enable dynamic IP addressing: %m");
+ close(fd);
+ }
+ dynaddr_set = 1; /* only 1 attempt */
+ }
+ our_old_addr = 0;
+
return 1;
}
SET_SA_FAMILY (rt.rt_gateway, AF_INET);
rt.rt_dev = ifname;
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
+ SIN_ADDR(rt.rt_gateway) = 0;
+ SIN_ADDR(rt.rt_dst) = his_adr;
rt.rt_flags = RTF_UP | RTF_HOST;
if (kernel_version > KVERSION(2,1,0)) {
SET_SA_FAMILY (rt.rt_genmask, AF_INET);
- ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
+ SIN_ADDR(rt.rt_genmask) = -1L;
}
if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
}
}
+ our_old_addr = our_adr;
+
return 1;
}
{
int flags;
+ looped = 1;
if (new_style_driver) {
/* allocate ourselves a ppp unit */
ifunit = -1;
void
restore_loop(void)
{
+ looped = 1;
if (new_style_driver) {
set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_LOOP_TRAFFIC);
return;
npi.protocol = proto;
npi.mode = mode;
if (ioctl(ppp_dev_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
- if (! ok_error (errno)) {
+ if (! ok_error (errno))
error("ioctl(PPPIOCSNPMODE, %d, %d): %m (%d)",
proto, mode, errno);
- error("ppp_dev_fd=%d slave_fd=%d\n", ppp_dev_fd, slave_fd);
- }
return 0;
}
return 1;
* Disable the IPX protocol if the support is not present in the kernel.
*/
char *path;
- int fd;
if (ipxcp_protent.enabled_flag) {
struct stat stat_buf;
driver_patch);
return 0;
}
- if (demand) {
- /* set ip_dynaddr if possible */
- path = path_to_procfs("/sys/net/ipv4/ip_dynaddr");
- if (path != 0 && (fd = open(path, O_WRONLY)) >= 0) {
- write(fd, "1", 1);
- close(fd);
- }
- }
return 1;
}
projects / ppp.git / blobdiff