X-Git-Url: https://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-linux.c;h=f38210a4720556cf53784008850dcc4858e4fb67;hp=67b50cb663fa827051dc4480116f72e259dfd516;hb=af30be0d252d0f38c40bff7178a00addecdd1bb1;hpb=2f2eb859fbf6e861ca5f039ef77add6513932eb4;ds=sidebyside diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c index 67b50cb..f38210a 100644 --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c @@ -73,12 +73,12 @@ #include #include #include -#include #include #include #include #include +#include #include #include #include @@ -102,7 +102,7 @@ #define MAX_ADDR_LEN 7 #endif -#if __GLIBC__ >= 2 +#if !defined(__GLIBC__) || __GLIBC__ >= 2 #include /* glibc 2 conflicts with linux/types.h */ #include #include @@ -163,6 +163,7 @@ struct in6_ifreq { eui64_copy(eui64, sin6.s6_addr32[2]); \ } while (0) +static const eui64_t nulleui64; #endif /* INET6 */ /* We can get an EIO error on an ioctl if the modem has hung up */ @@ -205,7 +206,9 @@ static char loop_name[20]; static unsigned char inbuf[512]; /* buffer for chars read from loopback */ static int if_is_up; /* Interface has been marked up */ +static int if6_is_up; /* Interface has been marked up for IPv6, to help differentiate */ static int have_default_route; /* Gateway for default route added */ +static int have_default_route6; /* Gateway for default IPv6 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 */ @@ -232,16 +235,20 @@ static int baud_rate_of (int speed); static void close_route_table (void); static int open_route_table (void); static int read_route_table (struct rtentry *rt); -static int defaultroute_exists (struct rtentry *rt); +static int defaultroute_exists (struct rtentry *rt, int metric); +static int defaultroute6_exists (struct in6_rtmsg *rt, int metric); static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr, char *name, int namelen); static void decode_version (char *buf, int *version, int *mod, int *patch); static int set_kdebugflag(int level); static int ppp_registered(void); static int make_ppp_unit(void); +static int setifstate (int u, int state); extern u_char inpacket_buf[]; /* borrowed from main.c */ +extern int dfl_route_metric; + /* * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, * if it exists. @@ -338,11 +345,18 @@ void sys_cleanup(void) if_is_up = 0; sifdown(0); } + if (if6_is_up) + sif6down(0); + /* * Delete any routes through the device. */ if (have_default_route) cifdefaultroute(0, 0, 0); +#ifdef INET6 + if (have_default_route6) + cif6defaultroute(0, nulleui64, nulleui64); +#endif if (has_proxy_arp) cifproxyarp(0, proxy_arp_addr); @@ -636,6 +650,21 @@ static int make_ppp_unit() } if (x < 0) error("Couldn't create new ppp unit: %m"); + + if (x == 0 && req_ifname[0] != '\0') { + struct ifreq ifr; + char t[MAXIFNAMELEN]; + memset(&ifr, 0, sizeof(struct ifreq)); + slprintf(t, sizeof(t), "%s%d", PPP_DRV_NAME, ifunit); + strlcpy(ifr.ifr_name, t, IF_NAMESIZE); + strlcpy(ifr.ifr_newname, req_ifname, IF_NAMESIZE); + x = ioctl(sock_fd, SIOCSIFNAME, &ifr); + if (x < 0) + error("Couldn't rename interface %s to %s: %m", t, req_ifname); + else + info("Renamed interface %s to %s", t, req_ifname); + } + return x; } @@ -966,6 +995,9 @@ void set_up_tty(int tty_fd, int local) break; } + if (stop_bits >= 2) + tios.c_cflag |= CSTOPB; + speed = translate_speed(inspeed); if (speed) { cfsetospeed (&tios, speed); @@ -1439,7 +1471,7 @@ static char *path_to_procfs(const char *tail) FILE *route_fd = (FILE *) 0; static char route_buffer[512]; static int route_dev_col, route_dest_col, route_gw_col; -static int route_flags_col, route_mask_col; +static int route_flags_col, route_metric_col, route_mask_col; static int route_num_cols; static int open_route_table (void); @@ -1482,6 +1514,7 @@ static int open_route_table (void) route_dest_col = 1; route_gw_col = 2; route_flags_col = 3; + route_metric_col = 6; route_mask_col = 7; route_num_cols = 8; @@ -1542,6 +1575,7 @@ static int read_route_table(struct rtentry *rt) 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_metric = (short) strtoul(cols[route_metric_col], NULL, 10); rt->rt_dev = cols[route_dev_col]; return 1; @@ -1550,9 +1584,10 @@ static int read_route_table(struct rtentry *rt) /******************************************************************** * * defaultroute_exists - determine if there is a default route + * with the given metric (or negative for any) */ -static int defaultroute_exists (struct rtentry *rt) +static int defaultroute_exists (struct rtentry *rt, int metric) { int result = 0; @@ -1565,7 +1600,8 @@ static int defaultroute_exists (struct rtentry *rt) if (kernel_version > KVERSION(2,1,0) && SIN_ADDR(rt->rt_genmask) != 0) continue; - if (SIN_ADDR(rt->rt_dst) == 0L) { + if (SIN_ADDR(rt->rt_dst) == 0L && (metric < 0 + || rt->rt_metric == metric)) { result = 1; break; } @@ -1612,13 +1648,13 @@ int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) { struct rtentry rt; - if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) { + if (defaultroute_exists(&rt, dfl_route_metric) && strcmp(rt.rt_dev, ifname) != 0) { if (rt.rt_flags & RTF_GATEWAY) - error("not replacing existing default route via %I", - SIN_ADDR(rt.rt_gateway)); + error("not replacing existing default route via %I with metric %d", + SIN_ADDR(rt.rt_gateway), dfl_route_metric); else - error("not replacing existing default route through %s", - rt.rt_dev); + error("not replacing existing default route through %s with metric %d", + rt.rt_dev, dfl_route_metric); return 0; } @@ -1626,6 +1662,7 @@ int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) SET_SA_FAMILY (rt.rt_dst, AF_INET); rt.rt_dev = ifname; + rt.rt_metric = dfl_route_metric + 1; /* +1 for binary compatibility */ if (kernel_version > KVERSION(2,1,0)) { SET_SA_FAMILY (rt.rt_genmask, AF_INET); @@ -1658,6 +1695,11 @@ int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) SET_SA_FAMILY (rt.rt_dst, AF_INET); SET_SA_FAMILY (rt.rt_gateway, AF_INET); + rt.rt_dev = ifname; + + rt.rt_dev = ifname; + rt.rt_metric = dfl_route_metric + 1; /* +1 for binary compatibility */ + if (kernel_version > KVERSION(2,1,0)) { SET_SA_FAMILY (rt.rt_genmask, AF_INET); SIN_ADDR(rt.rt_genmask) = 0L; @@ -1675,6 +1717,198 @@ int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) return 1; } +#ifdef INET6 +/* + * /proc/net/ipv6_route parsing stuff. + */ +static int route_dest_plen_col; +static int open_route6_table (void); +static int read_route6_table (struct in6_rtmsg *rt); + +/******************************************************************** + * + * open_route6_table - open the interface to the route table + */ +static int open_route6_table (void) +{ + char *path; + + close_route_table(); + + path = path_to_procfs("/net/ipv6_route"); + route_fd = fopen (path, "r"); + if (route_fd == NULL) { + error("can't open routing table %s: %m", path); + return 0; + } + + /* default to usual columns */ + route_dest_col = 0; + route_dest_plen_col = 1; + route_gw_col = 4; + route_metric_col = 5; + route_flags_col = 8; + route_dev_col = 9; + route_num_cols = 10; + + return 1; +} + +/******************************************************************** + * + * read_route6_table - read the next entry from the route table + */ + +static void hex_to_in6_addr(struct in6_addr *addr, const char *s) +{ + char hex8[9]; + unsigned i; + uint32_t v; + + hex8[8] = 0; + for (i = 0; i < 4; i++) { + memcpy(hex8, s + 8*i, 8); + v = strtoul(hex8, NULL, 16); + addr->s6_addr32[i] = v; + } +} + +static int read_route6_table(struct in6_rtmsg *rt) +{ + char *cols[ROUTE_MAX_COLS], *p; + int col; + + memset (rt, '\0', sizeof (struct in6_rtmsg)); + + if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) + return 0; + + p = route_buffer; + for (col = 0; col < route_num_cols; ++col) { + cols[col] = strtok(p, route_delims); + if (cols[col] == NULL) + return 0; /* didn't get enough columns */ + p = NULL; + } + + hex_to_in6_addr(&rt->rtmsg_dst, cols[route_dest_col]); + rt->rtmsg_dst_len = strtoul(cols[route_dest_plen_col], NULL, 16); + hex_to_in6_addr(&rt->rtmsg_gateway, cols[route_gw_col]); + + rt->rtmsg_metric = strtoul(cols[route_metric_col], NULL, 16); + rt->rtmsg_flags = strtoul(cols[route_flags_col], NULL, 16); + rt->rtmsg_ifindex = if_nametoindex(cols[route_dev_col]); + + return 1; +} + +/******************************************************************** + * + * defaultroute6_exists - determine if there is a default route + */ + +static int defaultroute6_exists (struct in6_rtmsg *rt, int metric) +{ + int result = 0; + + if (!open_route6_table()) + return 0; + + while (read_route6_table(rt) != 0) { + if ((rt->rtmsg_flags & RTF_UP) == 0) + continue; + + if (rt->rtmsg_dst_len != 0) + continue; + if (rt->rtmsg_dst.s6_addr32[0] == 0L + && rt->rtmsg_dst.s6_addr32[1] == 0L + && rt->rtmsg_dst.s6_addr32[2] == 0L + && rt->rtmsg_dst.s6_addr32[3] == 0L + && (metric < 0 || rt->rtmsg_metric == metric)) { + result = 1; + break; + } + } + + close_route_table(); + return result; +} + +/******************************************************************** + * + * sif6defaultroute - assign a default route through the address given. + * + * If the global default_rt_repl_rest flag is set, then this function + * already replaced the original system defaultroute with some other + * route and it should just replace the current defaultroute with + * another one, without saving the current route. Use: demand mode, + * when pppd sets first a defaultroute it it's temporary ppp0 addresses + * and then changes the temporary addresses to the addresses for the real + * ppp connection when it has come up. + */ + +int sif6defaultroute (int unit, eui64_t ouraddr, eui64_t gateway) +{ + struct in6_rtmsg rt; + char buf[IF_NAMESIZE]; + + if (defaultroute6_exists(&rt, dfl_route_metric) && + rt.rtmsg_ifindex != if_nametoindex(ifname)) { + if (rt.rtmsg_flags & RTF_GATEWAY) + error("not replacing existing default route via gateway"); + else + error("not replacing existing default route through %s", + if_indextoname(rt.rtmsg_ifindex, buf)); + return 0; + } + + memset (&rt, 0, sizeof (rt)); + + rt.rtmsg_ifindex = if_nametoindex(ifname); + rt.rtmsg_metric = dfl_route_metric + 1; /* +1 for binary compatibility */ + rt.rtmsg_dst_len = 0; + + rt.rtmsg_flags = RTF_UP; + if (ioctl(sock6_fd, SIOCADDRT, &rt) < 0) { + if ( ! ok_error ( errno )) + error("default route ioctl(SIOCADDRT): %m"); + return 0; + } + + have_default_route6 = 1; + return 1; +} + +/******************************************************************** + * + * cif6defaultroute - delete a default route through the address given. + */ + +int cif6defaultroute (int unit, eui64_t ouraddr, eui64_t gateway) +{ + struct in6_rtmsg rt; + + have_default_route6 = 0; + + memset (&rt, '\0', sizeof (rt)); + + rt.rtmsg_ifindex = if_nametoindex(ifname); + rt.rtmsg_metric = dfl_route_metric + 1; /* +1 for binary compatibility */ + rt.rtmsg_dst_len = 0; + + rt.rtmsg_flags = RTF_UP; + if (ioctl(sock6_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) { + if (still_ppp()) { + if ( ! ok_error ( errno )) + error("default route ioctl(SIOCDELRT): %m"); + return 0; + } + } + + return 1; +} +#endif /* INET6 */ + /******************************************************************** * * sifproxyarp - Make a proxy ARP entry for the peer. @@ -2016,7 +2250,7 @@ ppp_registered(void) int ppp_available(void) { - int s, ok, fd, err; + int s, ok, fd; struct ifreq ifr; int size; int my_version, my_modification, my_patch; @@ -2039,7 +2273,6 @@ int ppp_available(void) close(fd); return 1; } - err = errno; if (kernel_version >= KVERSION(2,3,13)) { error("Couldn't open the /dev/ppp device: %m"); @@ -2133,7 +2366,6 @@ int ppp_available(void) } } - close (s); if (!ok) { slprintf(route_buffer, sizeof(route_buffer), "Sorry - PPP driver version %d.%d.%d is out of date\n", @@ -2143,9 +2375,11 @@ int ppp_available(void) } } } + close(s); return ok; } +#ifndef HAVE_LOGWTMP /******************************************************************** * * Update the wtmp file with the appropriate user name and tty device. @@ -2219,7 +2453,7 @@ void logwtmp (const char *line, const char *name, const char *host) } #endif } - +#endif /* HAVE_LOGWTMP */ /******************************************************************** * @@ -2231,9 +2465,10 @@ int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) u_int x; if (vjcomp) { - if (ioctl(ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) + if (ioctl(ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { error("Couldn't set up TCP header compression: %m"); - vjcomp = 0; + vjcomp = 0; + } } x = (vjcomp? SC_COMP_TCP: 0) | (cidcomp? 0: SC_NO_TCP_CCID); @@ -2249,25 +2484,12 @@ int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) int sifup(int u) { - struct ifreq ifr; + int ret; - memset (&ifr, '\0', sizeof (ifr)); - strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { - if (! ok_error (errno)) - error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__); - return 0; - } - - ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT); - if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { - if (! ok_error (errno)) - error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__); - return 0; - } - if_is_up++; + if ((ret = setifstate(u, 1))) + if_is_up++; - return 1; + return ret; } /******************************************************************** @@ -2278,11 +2500,59 @@ int sifup(int u) int sifdown (int u) { - struct ifreq ifr; - if (if_is_up && --if_is_up > 0) return 1; +#ifdef INET6 + if (if6_is_up) + return 1; +#endif /* INET6 */ + + return setifstate(u, 0); +} + +#ifdef INET6 +/******************************************************************** + * + * sif6up - Config the interface up for IPv6 + */ + +int sif6up(int u) +{ + int ret; + + if ((ret = setifstate(u, 1))) + if6_is_up = 1; + + return ret; +} + +/******************************************************************** + * + * sif6down - Disable the IPv6CP protocol and config the interface + * down if there are no remaining protocols. + */ + +int sif6down (int u) +{ + if6_is_up = 0; + + if (if_is_up) + return 1; + + return setifstate(u, 0); +} +#endif /* INET6 */ + +/******************************************************************** + * + * setifstate - Config the interface up or down + */ + +static int setifstate (int u, int state) +{ + struct ifreq ifr; + memset (&ifr, '\0', sizeof (ifr)); strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { @@ -2291,7 +2561,10 @@ int sifdown (int u) return 0; } - ifr.ifr_flags &= ~IFF_UP; + if (state) + ifr.ifr_flags |= IFF_UP; + else + ifr.ifr_flags &= ~IFF_UP; ifr.ifr_flags |= IFF_POINTOPOINT; if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { if (! ok_error (errno)) @@ -2484,7 +2757,7 @@ int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64) memset(&ifr6, 0, sizeof(ifr6)); IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64); ifr6.ifr6_ifindex = ifr.ifr_ifindex; - ifr6.ifr6_prefixlen = 10; + ifr6.ifr6_prefixlen = 128; if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) { error("sif6addr: ioctl(SIOCSIFADDR): %m (line %d)", __LINE__); @@ -2495,7 +2768,7 @@ int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64) memset(&rt6, 0, sizeof(rt6)); IN6_LLADDR_FROM_EUI64(rt6.rtmsg_dst, his_eui64); rt6.rtmsg_flags = RTF_UP; - rt6.rtmsg_dst_len = 10; + rt6.rtmsg_dst_len = 128; rt6.rtmsg_ifindex = ifr.ifr_ifindex; rt6.rtmsg_metric = 1; @@ -2532,7 +2805,7 @@ int cif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64) memset(&ifr6, 0, sizeof(ifr6)); IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64); ifr6.ifr6_ifindex = ifr.ifr_ifindex; - ifr6.ifr6_prefixlen = 10; + ifr6.ifr6_prefixlen = 128; if (ioctl(sock6_fd, SIOCDIFADDR, &ifr6) < 0) { if (errno != EADDRNOTAVAIL) { @@ -2579,7 +2852,10 @@ get_pty(master_fdp, slave_fdp, slave_name, uid) warn("Couldn't unlock pty slave %s: %m", pty_name); #endif if ((sfd = open(pty_name, O_RDWR | O_NOCTTY)) < 0) + { warn("Couldn't open pty slave %s: %m", pty_name); + close(mfd); + } } } #endif /* TIOCGPTN */ @@ -2876,7 +3152,7 @@ ether_to_eui64(eui64_t *p_eui64) /* * And convert the EUI-48 into EUI-64, per RFC 2472 [sec 4.1] */ - ptr = ifr.ifr_hwaddr.sa_data; + ptr = (unsigned char *) ifr.ifr_hwaddr.sa_data; p_eui64->e8[0] = ptr[0] | 0x02; p_eui64->e8[1] = ptr[1]; p_eui64->e8[2] = ptr[2]; @@ -2889,3 +3165,38 @@ ether_to_eui64(eui64_t *p_eui64) return 1; } #endif + +/******************************************************************** + * + * get_time - Get current time, monotonic if possible. + */ +int +get_time(struct timeval *tv) +{ +/* Old glibc (< 2.3.4) does define CLOCK_MONOTONIC, but kernel may have it. + * Runtime checking makes it safe. */ +#ifndef CLOCK_MONOTONIC +#define CLOCK_MONOTONIC 1 +#endif + static int monotonic = -1; + struct timespec ts; + int ret; + + if (monotonic) { + ret = clock_gettime(CLOCK_MONOTONIC, &ts); + if (ret == 0) { + monotonic = 1; + if (tv) { + tv->tv_sec = ts.tv_sec; + tv->tv_usec = ts.tv_nsec / 1000; + } + return ret; + } else if (monotonic > 0) + return ret; + + monotonic = 0; + warn("Couldn't use monotonic clock source: %m"); + } + + return gettimeofday(tv, NULL); +}