ppp_vxworks.c
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上传日期:2007-01-17
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文件大小:18k
- /* ppp_vxworks.c - System-dependent procedures for setting up PPP interfaces */
- /* Copyright 1995 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
- /*
- modification history
- --------------------
- 01i,30jan01,ijm Fixed spr 34274, OPT_PROXYARP is not setting ARP entry
- correctly. It times out.
- 01h,17feb99,sgv Fixed spr 22486, Proxy Arp fix.
- 01g,05aug96,vin upgraded to BSD4.4., replaced rtentry with ortentry,
- reworked get_ether_addr since ifreq struct changed.
- switched the order of initialization in sifaddr().
- 01f,16jun95,dzb header file consolidation.
- 01e,15may95,dzb changed LOG_ERR for route delete to LOG_WARNING.
- 01d,06mar95,dzb proxyArp fix (SPR #4074).
- 01c,07feb95,dzb changed to look for OK from pppwrite().
- 01b,16jan95,dzb renamed to ppp_vxworks.c. warnings cleanup.
- 01a,21dec94,dab VxWorks port - first WRS version.
- +dzb added: path for ppp header files, WRS copyright.
- */
- #include "vxWorks.h"
- #include "string.h"
- #include "stdlib.h"
- #include "stdio.h"
- #include "ioctl.h"
- #include "ioLib.h"
- #include "sys/ioctl.h"
- #include "sys/types.h"
- #include "sys/socket.h"
- #include "sys/times.h"
- #include "net/if.h"
- #include "net/if_arp.h"
- #include "netinet/if_ether.h"
- #include "net/if_dl.h"
- #include "errno.h"
- #include "net/if.h"
- #include "net/route.h"
- #include "netinet/in.h"
- #include "pppLib.h"
- #include "logLib.h"
- IMPORT struct ifnet *ifnet; /* list of all network interfaces */
- IMPORT void arptfree (struct llinfo_arp *);
-
- int pppArpCmd (int cmd, struct arpreq * ar);
- /*
- * establish_ppp - Turn the serial port into a ppp interface.
- */
- void
- establish_ppp()
- {
- int x;
- /* get ppp fd */
- if (ppptioctl(ppp_unit, PPPIOCGFD, (caddr_t) &(ppp_if[ppp_unit]->fd)) < 0) {
- syslog(LOG_ERR, "ppptioctl(PPPIOCGFD) error");
- die(ppp_unit, 1);
- }
- /*
- * Enable debug in the driver if requested.
- */
- if (ppp_if[ppp_unit]->kdebugflag) {
- if (ppptioctl(ppp_unit, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): error");
- } else {
- x |= (ppp_if[ppp_unit]->kdebugflag & 0xFF) * SC_DEBUG;
- if (ppptioctl(ppp_unit, PPPIOCSFLAGS, (caddr_t) &x) < 0)
- syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): error");
- }
- }
- }
- /*
- * disestablish_ppp - Restore the serial port to normal operation.
- * This shouldn't call die() because it's called from die().
- */
- void
- disestablish_ppp()
- {
- }
- /*
- * output - Output PPP packet.
- */
- void
- output(unit, p, len)
- int unit;
- u_char *p;
- int len;
- {
- if (ppp_if[unit]->debug)
- log_packet(p, len, "sent ");
- if (pppwrite(unit, (char *) p, len) != OK) {
- syslog(LOG_ERR, "write error");
- die(unit, 1);
- }
- }
- /*
- * read_packet - get a PPP packet from the serial device.
- */
- int
- read_packet(buf)
- u_char *buf;
- {
- int len;
- len = pppread(ppp_unit, (char *) buf, MTU + DLLHEADERLEN);
- if (len == 0) {
- MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK"));
- return -1;
- }
- return len;
- }
- /*
- * ppp_send_config - configure the transmit characteristics of
- * the ppp interface.
- */
- void
- ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
- int unit, mtu;
- u_long asyncmap;
- int pcomp, accomp;
- {
- u_int x;
- if (ppptioctl(unit, SIOCSIFMTU, (caddr_t) &mtu) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFMTU) error");
- die(unit, 1);
- }
- if (ppptioctl(unit, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP) error");
- die(unit, 1);
- }
- if (ppptioctl(unit, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS) error");
- die(unit, 1);
- }
- x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
- x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
- if (ppptioctl(unit, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS) error");
- die(unit, 1);
- }
- }
- /*
- * ppp_set_xaccm - set the extended transmit ACCM for the interface.
- */
- void
- ppp_set_xaccm(unit, accm)
- int unit;
- ext_accm accm;
- {
- if (ppptioctl(unit, PPPIOCSXASYNCMAP, (caddr_t) accm) < 0)
- syslog(LOG_WARNING, "ioctl(set extended ACCM): error");
- }
- /*
- * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.
- */
- void
- ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
- int unit, mru;
- u_long asyncmap;
- int pcomp, accomp;
- {
- int x;
- if (ppptioctl(unit, PPPIOCSMRU, (caddr_t) &mru) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSMRU): error");
- die(unit, 1);
- }
- if (ppptioctl(unit, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): error");
- die(unit, 1);
- }
- if (ppptioctl(unit, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): error");
- die(unit, 1);
- }
- x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
- if (ppptioctl(unit, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): error");
- die(unit, 1);
- }
- }
- /*
- * sifvjcomp - config tcp header compression
- */
- int
- sifvjcomp(u, vjcomp, cidcomp, maxcid)
- int u, vjcomp, cidcomp, maxcid;
- {
- u_int x;
- if (ppptioctl(u, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS) error");
- return 0;
- }
- x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
- x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
- if (ppptioctl(u, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS) error");
- return 0;
- }
- if (ppptioctl(u, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): error");
- return 0;
- }
- return 1;
- }
- /*
- * 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, ppp_if[u]->ifname, sizeof (ifr.ifr_name));
- if (ioctl(ppp_if[u]->s, SIOCGIFFLAGS, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS) error");
- return 0;
- }
- ifr.ifr_flags |= IFF_UP;
- if (ioctl(ppp_if[u]->s, SIOCSIFFLAGS, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS) error");
- return 0;
- }
- if (ppptioctl(u, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): error");
- return 0;
- }
- x |= SC_ENABLE_IP;
- if (ppptioctl(u, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): error");
- return 0;
- }
- return 1;
- }
- /*
- * sifdown - Config the interface down and disable IP.
- */
- int
- sifdown(u)
- int u;
- {
- struct ifreq ifr;
- u_int x;
- int rv;
- rv = 1;
- if (ppptioctl(u, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): error");
- rv = 0;
- } else {
- x &= ~SC_ENABLE_IP;
- if (ppptioctl(u, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): error");
- rv = 0;
- }
- }
- strncpy(ifr.ifr_name, ppp_if[u]->ifname, sizeof (ifr.ifr_name));
- if (ioctl(ppp_if[u]->s, SIOCGIFFLAGS, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS) error");
- rv = 0;
- } else {
- ifr.ifr_flags &= ~IFF_UP;
- if (ioctl(ppp_if[u]->s, SIOCSIFFLAGS, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): error");
- rv = 0;
- }
- }
- return rv;
- }
- /*
- * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
- * if it exists.
- */
- #define SET_SA_FAMILY(addr, family)
- BZERO((char *) &(addr), sizeof(addr));
- addr.sa_family = (family);
-
- /*
- * sifaddr - Config the interface IP addresses and netmask.
- */
- int
- sifaddr(u, o, h, m)
- int u, o, h, m;
- {
- struct ifreq ifr;
- strncpy(ifr.ifr_name, ppp_if[u]->ifname, sizeof(ifr.ifr_name));
- SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
- ifr.ifr_addr.sa_len = sizeof (struct sockaddr_in);
- if (m != 0) {
- ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
- syslog(LOG_NOTICE, "Setting interface mask to %s", ip_ntoa(m));
- if (ioctl(ppp_if[u]->s, SIOCSIFNETMASK, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): error");
- return (0);
- }
- }
- SET_SA_FAMILY(ifr.ifr_dstaddr, AF_INET);
- ifr.ifr_dstaddr.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
- if (ioctl(ppp_if[u]->s, SIOCSIFDSTADDR, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): error");
- return (0);
- }
- SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
- ifr.ifr_addr.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
- if (ioctl(ppp_if[u]->s, SIOCSIFADDR, (int) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFADDR): error");
- return (0);
- }
- return 1;
- }
- /*
- * cifaddr - Clear the interface IP addresses, and delete routes
- * through the interface if possible.
- */
- int
- cifaddr(u, o, h)
- int u, o, h;
- {
- struct ortentry rt;
-
- SET_SA_FAMILY(rt.rt_dst, AF_INET);
- rt.rt_dst.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
- SET_SA_FAMILY(rt.rt_gateway, AF_INET);
- rt.rt_gateway.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
- rt.rt_flags = RTF_HOST;
- if (ioctl(ppp_if[u]->s, SIOCDELRT, (int) &rt) < 0) {
- syslog(LOG_WARNING, "ioctl(SIOCDELRT) error");
- return 0;
- }
- return 1;
- }
- /*
- * sifdefaultroute - assign a default route through the address given.
- */
- int
- sifdefaultroute(u, g)
- int u, g;
- {
- struct ortentry rt;
- SET_SA_FAMILY(rt.rt_dst, AF_INET);
- rt.rt_dst.sa_len = sizeof (struct sockaddr_in);
- SET_SA_FAMILY(rt.rt_gateway, AF_INET);
- rt.rt_gateway.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
- rt.rt_flags = RTF_GATEWAY;
- if (ioctl(ppp_if[u]->s, SIOCADDRT, (int) &rt) < 0) {
- syslog(LOG_ERR, "default route ioctl(SIOCADDRT): error");
- return 0;
- }
- return 1;
- }
- /*
- * cifdefaultroute - delete a default route through the address given.
- */
- int
- cifdefaultroute(u, g)
- int u, g;
- {
- struct ortentry rt;
- SET_SA_FAMILY(rt.rt_dst, AF_INET);
- rt.rt_dst.sa_len = sizeof (struct sockaddr_in);
- SET_SA_FAMILY(rt.rt_gateway, AF_INET);
- rt.rt_gateway.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
- rt.rt_flags = RTF_GATEWAY;
- if (ioctl(ppp_if[u]->s, SIOCDELRT, (int) &rt) < 0)
- syslog(LOG_WARNING, "default route ioctl(SIOCDELRT): error");
- return 1;
- }
- /*
- * sifproxyarp - Make a proxy ARP entry for the peer.
- */
- int
- sifproxyarp(unit, hisaddr)
- int unit;
- u_long hisaddr;
- {
- struct arpreq arpreq;
- BZERO((char *)&arpreq, sizeof(arpreq));
- /*
- * Get the hardware address of an interface on the same subnet
- * as our local address.
- */
- if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
- syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
- return 0;
- }
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- arpreq.arp_pa.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
- arpreq.arp_flags = ATF_PERM | ATF_PUBL;
- pppArpCmd (SIOCSARP, &arpreq);
- return 1;
- }
- int pppArpCmd
- (
- int cmd,
- struct arpreq * ar
- )
- {
- struct sockaddr_in * soInAddr;
- struct llinfo_arp * la = NULL;
- struct rtentry * rt = NULL;
- struct sockaddr_dl * sdl= NULL;
- if (ar->arp_pa.sa_family != AF_INET ||
- ar->arp_ha.sa_family != AF_UNSPEC)
- return (EAFNOSUPPORT);
- soInAddr = (struct sockaddr_in *)&ar->arp_pa;
- switch (cmd)
- {
- case SIOCSARP:
- {
- register struct rtentry *rt;
- static struct sockaddr_inarp sin = {sizeof(sin), AF_INET };
- int proxy = 1;
- int create = 1;
- #define rt_expire rt_rmx.rmx_expire
- #define SDL(s) ((struct sockaddr_dl *)s)
- sin.sin_addr.s_addr = soInAddr->sin_addr.s_addr;
- sin.sin_other = proxy ? SIN_PROXY : 0;
- rt = rtalloc1((struct sockaddr *)&sin, create);
- if (rt == 0)
- return (0);
- rt->rt_refcnt--;
- rt->rt_expire = 0;
- if ((rt->rt_flags & RTF_GATEWAY) ||
- (rt->rt_flags & RTF_LLINFO) == 0 ||
- rt->rt_gateway->sa_family != AF_LINK) {
- if (create)
- logMsg("arptnew failed on %xn",
- (int)ntohl(soInAddr->sin_addr.s_addr),
- 0,0,0,0,0);
- return (0);
- }
- la = (struct llinfo_arp *)rt->rt_llinfo;
- }
- rt = la->la_rt;
- sdl = SDL(rt->rt_gateway);
- bcopy((caddr_t)ar->arp_ha.sa_data, LLADDR(sdl),
- sdl->sdl_alen = sizeof(struct ether_addr));
- rt->rt_flags &= ~RTF_REJECT;
- rt->rt_flags |= RTF_STATIC; /* manually added route. */
- la->la_asked = 0;
- break;
- case SIOCDARP: /* delete entry */
- {
- register struct rtentry *rt;
- static struct sockaddr_inarp sin = {sizeof(sin), AF_INET };
- int proxy = 1;
- int create = 0;
- sin.sin_addr.s_addr = soInAddr->sin_addr.s_addr;
- sin.sin_other = proxy ? SIN_PROXY : 0;
- rt = rtalloc1((struct sockaddr *)&sin, create);
- if (rt == 0)
- return (0);
- rt->rt_refcnt--;
- if ((rt->rt_flags & RTF_GATEWAY) ||
- (rt->rt_flags & RTF_LLINFO) == 0 ||
- rt->rt_gateway->sa_family != AF_LINK) {
- if (create)
- logMsg("arptnew failed on %xn",
- (int)ntohl(soInAddr->sin_addr.s_addr),
- 0,0,0,0,0);
- return (0);
- }
- la = (struct llinfo_arp *)rt->rt_llinfo;
- arptfree(la);
- }
- break;
- }
- return (0);
- }
- /*
- * cifproxyarp - Delete the proxy ARP entry for the peer.
- */
- int
- cifproxyarp(unit, hisaddr)
- int unit;
- u_long hisaddr;
- {
- struct arpreq arpreq;
- BZERO((char *)&arpreq, sizeof(arpreq));
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- arpreq.arp_pa.sa_len = sizeof (struct sockaddr_in);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
- pppArpCmd (SIOCDARP, &arpreq);
- return 1;
- }
- /*
- * get_ether_addr - get the hardware address of an interface on the
- * the same subnet as ipaddr.
- */
- #define MAX_IFS 32
- int
- get_ether_addr(ipaddr, hwaddr)
- u_long ipaddr;
- struct sockaddr *hwaddr;
- {
- struct ifnet *ifp;
- struct ifreq *ifr, *ifend;
- u_long ina, mask;
- struct ifreq ifreq;
- struct ifconf ifc;
- struct ifreq ifs[MAX_IFS];
- ifc.ifc_len = sizeof(ifs);
- ifc.ifc_req = ifs;
- if (ioctl(ppp_if[ppp_unit]->s, SIOCGIFCONF, (int) &ifc) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCGIFCONF) error");
- return 0;
- }
- /*
- * Scan through looking for an interface with an Internet
- * address on the same subnet as `ipaddr'.
- */
- ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
- for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)((char *)ifr +
- sizeof(ifr->ifr_name) +
- ifr->ifr_addr.sa_len))
- {
- if (ifr->ifr_addr.sa_family == AF_INET) {
- ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
- strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
- /*
- * Check that the interface is up, and not point-to-point
- * or loopback.
- */
- if (ioctl(ppp_if[ppp_unit]->s, SIOCGIFFLAGS, (int) &ifreq) < 0)
- continue;
- if ((ifreq.ifr_flags &
- (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
- != (IFF_UP|IFF_BROADCAST))
- continue;
- /*
- * Get its netmask and check that it's on the right subnet.
- */
- if (ioctl(ppp_if[ppp_unit]->s, SIOCGIFNETMASK, (int) &ifreq) < 0)
- continue;
- mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
- if ((ipaddr & mask) != (ina & mask))
- continue;
- break;
- }
- }
- if (ifr >= ifend)
- return 0;
- if ((ifp = ifunit (ifr->ifr_name)) == NULL)
- return 0;
- syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
- /* stuff the ethernet hw address for the arp add call */
- bcopy ((caddr_t) ((struct arpcom *)ifp)->ac_enaddr,
- (caddr_t) hwaddr->sa_data, sizeof(((struct arpcom *)ifp)->ac_enaddr));
- hwaddr->sa_family = AF_UNSPEC;
- return 1;
- }
- /*
- * 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()
- {
- #ifdef notyet
- int s, ok;
- struct ifreq ifr;
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- return 1; /* can't tell - maybe we're not root */
- strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
- ok = ioctl(s, SIOCGIFFLAGS, (int) &ifr) >= 0;
- close(s);
- return ok;
- #else /* notyet */
- return 1;
- #endif /* notyet */
- }
- #ifdef __STDC__
- #include <stdarg.h>
- void
- syslog(int level, char *fmt, ...)
- {
- va_list pvar;
- char buf[256];
- va_start(pvar, fmt);
- vsprintf(buf, fmt, pvar);
- va_end(pvar);
- printf("ppp%d: %srn", ppp_unit, buf);
- }
- #else /* __STDC__ */
- #include <varargs.h>
- void
- syslog(level, fmt, va_alist)
- int level;
- char *fmt;
- va_dcl
- {
- va_list pvar;
- char buf[256];
- va_start(pvar);
- vprintf(fmt, pvar);
- va_end(pvar);
- printf("ppp%d: %srn", ppp_unit, buf);
- }
- #endif /* __STDC__ */
- char *stringdup(in)
- char *in;
- {
- char* dup;
- if ((dup = (char *)malloc(strlen(in) + 1)) == NULL)
- return NULL;
- (void) strcpy(dup, in);
- return (dup);
- }