X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-bsd.c;h=f07a3b7351b7fa8462f8d2700d3c77ff4018b56d;hp=5d78b381b338e912c3b9d419085df3623c7eb7cc;hb=31e531a04e1f20c89aef30b0744bed4eb0c1806a;hpb=978b060face292e3fe3fa10b355c46853a728569;ds=sidebyside

diff --git a/pppd/sys-bsd.c b/pppd/sys-bsd.c
index 5d78b38..f07a3b7 100644
--- a/pppd/sys-bsd.c
+++ b/pppd/sys-bsd.c
@@ -19,7 +19,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/04/11 07:16:50 paulus Exp $";
+static char rcsid[] = "$Id: sys-bsd.c,v 1.9 1994/08/22 00:41:00 paulus Exp $";
 #endif
 
 /*
@@ -32,7 +32,6 @@ static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/04/11 07:16:50 paulus Exp $";
 #include <sys/socket.h>
 #include <sys/time.h>
 #include <sys/errno.h>
-#include <sys/wait.h>
 
 #include <net/if.h>
 #include <net/if_ppp.h>
@@ -40,11 +39,16 @@ static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/04/11 07:16:50 paulus Exp $";
 #include <net/if_dl.h>
 #include <netinet/in.h>
 
+#if RTM_VERSION >= 3
+#include <netinet/if_ether.h>
+#endif
+
 #include "pppd.h"
 #include "ppp.h"
 
-static int initdisc;		/* Initial TTY discipline */
-
+static int initdisc = -1;		/* Initial TTY discipline */
+extern int kdebugflag;
+static int rtm_seq;
 
 /*
  * establish_ppp - Turn the serial port into a ppp interface.
@@ -53,6 +57,7 @@ void
 establish_ppp()
 {
     int pppdisc = PPPDISC;
+    int x;
 
     if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
@@ -70,6 +75,19 @@ establish_ppp()
 	syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
 	die(1);
     }
+
+    /*
+     * Enable debug in the driver if requested.
+     */
+    if (kdebugflag) {
+	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	    syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
+	} else {
+	    x |= (kdebugflag & 0xFF) * SC_DEBUG;
+	    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+		syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
+	}
+    }
 }
 
 
@@ -80,8 +98,37 @@ establish_ppp()
 void
 disestablish_ppp()
 {
-    if (ioctl(fd, TIOCSETD, &initdisc) < 0)
-	syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+    int x;
+    char *s;
+
+    if (initdisc >= 0) {
+	/*
+	 * Check whether the link seems not to be 8-bit clean.
+	 */
+	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
+	    s = NULL;
+	    switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
+	    case SC_RCV_B7_0:
+		s = "bit 7 set to 1";
+		break;
+	    case SC_RCV_B7_1:
+		s = "bit 7 set to 0";
+		break;
+	    case SC_RCV_EVNP:
+		s = "odd parity";
+		break;
+	    case SC_RCV_ODDP:
+		s = "even parity";
+		break;
+	    }
+	    if (s != NULL) {
+		syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
+		syslog(LOG_WARNING, "All received characters had %s", s);
+	    }
+	}
+	if (ioctl(fd, TIOCSETD, &initdisc) < 0)
+	    syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+    }
 }
 
 
@@ -106,6 +153,27 @@ output(unit, p, len)
 }
 
 
+/*
+ * wait_input - wait until there is data available on fd,
+ * for the length of time specified by *timo (indefinite
+ * if timo is NULL).
+ */
+wait_input(timo)
+    struct timeval *timo;
+{
+    fd_set ready;
+    int n;
+
+    FD_ZERO(&ready);
+    FD_SET(fd, &ready);
+    n = select(fd+1, &ready, NULL, &ready, timo);
+    if (n < 0 && errno != EINTR) {
+	syslog(LOG_ERR, "select: %m");
+	die(1);
+    }
+}
+
+
 /*
  * read_packet - get a PPP packet from the serial device.
  */
@@ -164,9 +232,23 @@ ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
     }
 }
 
+
+/*
+ * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+void
+ppp_set_xaccm(unit, accm)
+    int unit;
+    ext_accm accm;
+{
+    if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
+	syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
+}
+
+
 /*
  * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.  At present this does nothing.
+ * the ppp interface.
  */
 void
 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
@@ -195,6 +277,41 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
     }
 }
 
+/*
+ * ccp_test - ask kernel whether a given compression method
+ * is acceptable for use.
+ */
+ccp_test(unit, opt_ptr, opt_len, for_transmit)
+    int unit, opt_len, for_transmit;
+    u_char *opt_ptr;
+{
+    struct ppp_comp_data data;
+
+    data.ptr = opt_ptr;
+    data.length = opt_len;
+    data.transmit = for_transmit;
+    return ioctl(fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0;
+}
+
+/*
+ * ccp_flags_set - inform kernel about the current state of CCP.
+ */
+void
+ccp_flags_set(unit, isopen, isup)
+    int unit, isopen, isup;
+{
+    int x;
+
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	return;
+    }
+    x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
+    x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
+    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+}
+
 /*
  * sifvjcomp - config tcp header compression
  */
@@ -222,12 +339,15 @@ sifvjcomp(u, vjcomp, cidcomp, maxcid)
 }
 
 /*
- * sifup - Config the interface up.
+ * sifup - Config the interface up and enable IP packets to pass.
  */
 int
 sifup(u)
+    int u;
 {
     struct ifreq ifr;
+    u_int x;
+
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
@@ -238,27 +358,52 @@ sifup(u)
 	syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
 	return 0;
     }
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	return 0;
+    }
+    x |= SC_ENABLE_IP;
+    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	return 0;
+    }
     return 1;
 }
 
 /*
- * sifdown - Config the interface down.
+ * sifdown - Config the interface down and disable IP.
  */
 int
 sifdown(u)
+    int u;
 {
     struct ifreq ifr;
+    u_int x;
+    int rv;
+
+    rv = 1;
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	rv = 0;
+    } else {
+	x &= ~SC_ENABLE_IP;
+	if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	    syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	    rv = 0;
+	}
+    }
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
-	return 0;
-    }
-    ifr.ifr_flags &= ~IFF_UP;
-    if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
-	syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
-	return 0;
+	rv = 0;
+    } else {
+	ifr.ifr_flags &= ~IFF_UP;
+	if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+	    syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+	    rv = 0;
+	}
     }
-    return 1;
+    return rv;
 }
 
 /*
@@ -275,6 +420,8 @@ sifdown(u)
  */
 int
 sifaddr(u, o, h, m)
+    int u;
+    u_long o, h, m;
 {
     struct ifaliasreq ifra;
 
@@ -304,6 +451,8 @@ sifaddr(u, o, h, m)
  */
 int
 cifaddr(u, o, h)
+    int u;
+    u_long o, h;
 {
     struct ifaliasreq ifra;
 
@@ -325,36 +474,164 @@ cifaddr(u, o, h)
  */
 int
 sifdefaultroute(u, g)
+    int u;
+    u_long g;
 {
-    struct ortentry rt;
-
-    SET_SA_FAMILY(rt.rt_dst, AF_INET);
-    SET_SA_FAMILY(rt.rt_gateway, AF_INET);
-    ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
-    rt.rt_flags = RTF_GATEWAY;
-    if (ioctl(s, SIOCADDRT, &rt) < 0) {
-	syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
+    return dodefaultroute(g, 's');
+}
+
+/*
+ * cifdefaultroute - delete a default route through the address given.
+ */
+int
+cifdefaultroute(u, g)
+    int u;
+    u_long g;
+{
+    return dodefaultroute(g, 'c');
+}
+
+/*
+ * dodefaultroute - talk to a routing socket to add/delete a default route.
+ */
+int
+dodefaultroute(g, cmd)
+    u_long g;
+    int cmd;
+{
+    int routes;
+    struct {
+	struct rt_msghdr	hdr;
+	struct sockaddr_in	dst;
+	struct sockaddr_in	gway;
+	struct sockaddr_in	mask;
+    } rtmsg;
+
+    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
+	syslog(LOG_ERR, "%cifdefaultroute: opening routing socket: %m", cmd);
+	return 0;
+    }
+
+    memset(&rtmsg, 0, sizeof(rtmsg));
+    rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
+    rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY;
+    rtmsg.hdr.rtm_version = RTM_VERSION;
+    rtmsg.hdr.rtm_seq = ++rtm_seq;
+    rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
+    rtmsg.dst.sin_len = sizeof(rtmsg.dst);
+    rtmsg.dst.sin_family = AF_INET;
+    rtmsg.gway.sin_len = sizeof(rtmsg.gway);
+    rtmsg.gway.sin_family = AF_INET;
+    rtmsg.gway.sin_addr.s_addr = g;
+    rtmsg.mask.sin_len = sizeof(rtmsg.dst);
+    rtmsg.mask.sin_family = AF_INET;
+
+    rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
+    if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
+	syslog(LOG_ERR, "%s default route: %m", cmd=='s'? "add": "delete");
+	close(routes);
 	return 0;
     }
+
+    close(routes);
     return 1;
 }
 
+#if RTM_VERSION >= 3
+
 /*
- * cifdefaultroute - delete a default route through the address given.
+ * sifproxyarp - Make a proxy ARP entry for the peer.
  */
+static struct {
+    struct rt_msghdr		hdr;
+    struct sockaddr_inarp	dst;
+    struct sockaddr_dl		hwa;
+    char			extra[128];
+} arpmsg;
+
+static int arpmsg_valid;
+
 int
-cifdefaultroute(u, g)
+sifproxyarp(unit, hisaddr)
+    int unit;
+    u_long hisaddr;
 {
-    struct ortentry rt;
-
-    SET_SA_FAMILY(rt.rt_dst, AF_INET);
-    SET_SA_FAMILY(rt.rt_gateway, AF_INET);
-    ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
-    rt.rt_flags = RTF_GATEWAY;
-    if (ioctl(s, SIOCDELRT, &rt) < 0)
-	syslog(LOG_WARNING, "default route ioctl(SIOCDELRT): %m");
+    int routes;
+    int l;
+
+    /*
+     * Get the hardware address of an interface on the same subnet
+     * as our local address.
+     */
+    memset(&arpmsg, 0, sizeof(arpmsg));
+    if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
+	syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
+	return 0;
+    }
+
+    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
+	syslog(LOG_ERR, "sifproxyarp: opening routing socket: %m");
+	return 0;
+    }
+
+    arpmsg.hdr.rtm_type = RTM_ADD;
+    arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
+    arpmsg.hdr.rtm_version = RTM_VERSION;
+    arpmsg.hdr.rtm_seq = ++rtm_seq;
+    arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
+    arpmsg.hdr.rtm_inits = RTV_EXPIRE;
+    arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
+    arpmsg.dst.sin_family = AF_INET;
+    arpmsg.dst.sin_addr.s_addr = hisaddr;
+    arpmsg.dst.sin_other = SIN_PROXY;
+
+    arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
+	+ arpmsg.hwa.sdl_len;
+    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
+	syslog(LOG_ERR, "add proxy arp entry: %m");
+	close(routes);
+	return 0;
+    }
+
+    close(routes);
+    arpmsg_valid = 1;
+    return 1;
+}
+
+/*
+ * cifproxyarp - Delete the proxy ARP entry for the peer.
+ */
+int
+cifproxyarp(unit, hisaddr)
+    int unit;
+    u_long hisaddr;
+{
+    int routes;
+
+    if (!arpmsg_valid)
+	return 0;
+    arpmsg_valid = 0;
+
+    arpmsg.hdr.rtm_type = RTM_DELETE;
+    arpmsg.hdr.rtm_seq = ++rtm_seq;
+
+    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
+	syslog(LOG_ERR, "sifproxyarp: opening routing socket: %m");
+	return 0;
+    }
+
+    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
+	syslog(LOG_ERR, "delete proxy arp entry: %m");
+	close(routes);
+	return 0;
+    }
+
+    close(routes);
+    return 1;
 }
 
+#else	/* RTM_VERSION */
+
 /*
  * sifproxyarp - Make a proxy ARP entry for the peer.
  */
@@ -364,6 +641,10 @@ sifproxyarp(unit, hisaddr)
     u_long hisaddr;
 {
     struct arpreq arpreq;
+    struct {
+	struct sockaddr_dl	sdl;
+	char			space[128];
+    } dls;
 
     BZERO(&arpreq, sizeof(arpreq));
 
@@ -371,11 +652,14 @@ sifproxyarp(unit, hisaddr)
      * Get the hardware address of an interface on the same subnet
      * as our local address.
      */
-    if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
+    if (!get_ether_addr(hisaddr, &dls.sdl)) {
 	syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
 	return 0;
     }
 
+    arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
+    arpreq.arp_ha.sa_family = AF_UNSPEC;
+    BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
     SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
     ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
     arpreq.arp_flags = ATF_PERM | ATF_PUBL;
@@ -406,6 +690,8 @@ cifproxyarp(unit, hisaddr)
     }
     return 1;
 }
+#endif	/* RTM_VERSION */
+
 
 /*
  * get_ether_addr - get the hardware address of an interface on the
@@ -416,7 +702,7 @@ cifproxyarp(unit, hisaddr)
 int
 get_ether_addr(ipaddr, hwaddr)
     u_long ipaddr;
-    struct sockaddr *hwaddr;
+    struct sockaddr_dl *hwaddr;
 {
     struct ifreq *ifr, *ifend, *ifp;
     u_long ina, mask;
@@ -480,10 +766,8 @@ get_ether_addr(ipaddr, hwaddr)
 	    /*
 	     * Found the link-level address - copy it out
 	     */
-	    dla = (struct sockaddr_dl *)&ifr->ifr_addr;
-	    hwaddr->sa_len = sizeof(struct sockaddr);
-	    hwaddr->sa_family = AF_UNSPEC;
-	    BCOPY(LLADDR(dla), hwaddr->sa_data, dla->sdl_alen);
+	    dla = (struct sockaddr_dl *) &ifr->ifr_addr;
+	    BCOPY(dla, hwaddr, dla->sdl_len);
 	    return 1;
 	}
 	ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
@@ -492,11 +776,11 @@ get_ether_addr(ipaddr, hwaddr)
     return 0;
 }
 
+
 /*
  * ppp_available - check whether the system has any ppp interfaces
  * (in fact we check whether we can do an ioctl on ppp0).
  */
-
 int
 ppp_available()
 {
@@ -512,42 +796,3 @@ ppp_available()
 
     return ok;
 }
-
-/*
- * run-program - execute a program with given arguments.
- * Returns the exit status, or -1 if an error occurred.
- * If the program can't be executed, logs an error unless
- * must_exist is 0 and the program file doesn't exist.
- */
-
-int
-run_program(prog, args, must_exist)
-    char *prog;
-    char **args;
-    int must_exist;
-{
-    pid_t pid;
-    int status;
-
-    pid = fork();
-    if (pid == -1) {
-	syslog(LOG_ERR, "can't fork to run %s: %m", prog);
-	return -1;
-    }
-    if (pid == 0) {
-	execv(prog, args);
-	if (must_exist || errno != ENOENT)
-	    syslog(LOG_WARNING, "can't execute %s: %m", prog);
-	_exit(-1);
-    }
-    if (waitpid(pid, &status, 0) == -1) {
-	syslog(LOG_ERR, "waitpid: %m");
-	return -1;
-    }
-    if (WIFSIGNALED(status)) {
-	syslog(LOG_INFO, "%s terminated with signal %d", prog,
-	       WTERMSIG(status));
-	return -1;
-    }
-    return WEXITSTATUS(status);
-}