X-Git-Url: https://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-linux.c;h=9647365eda2dfd229799eb2a3768273e6de77ba2;hp=c86d668d8ddda4a6e07e1909019b0cdd806771ca;hb=7ecd94f94b5e81f5a4b15beaae1f917f0874bea6;hpb=9164ea8da8dd803c9c8a34bb2bab7742669f65de diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c index c86d668..9647365 100644 --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -37,6 +38,7 @@ #include #include #include +#include /* This is in netdevice.h. However, this compile will fail miserably if you attempt to include netdevice.h because it has so many references @@ -47,31 +49,40 @@ #define MAX_ADDR_LEN 7 #endif -#include -#include -#include +#if __GLIBC__ >= 2 +#include #include -#include +#include #include +#include +#else +#include +#include +#include +#include +#include #include +#endif #include #include "pppd.h" #include "fsm.h" #include "ipcp.h" - -#ifndef RTF_DEFAULT /* Normally in from */ -#define RTF_DEFAULT 0 -#endif +#include "patchlevel.h" #ifdef IPX_CHANGE #include "ipxcp.h" -#endif +#include +#endif /* IPX_CHANGE */ #ifdef LOCKLIB #include #endif +#ifndef RTF_DEFAULT /* Normally in from */ +#define RTF_DEFAULT 0 +#endif + #define ok_error(num) ((num)==EIO) static int tty_disc = N_TTY; /* The TTY discipline */ @@ -86,6 +97,7 @@ static int has_proxy_arp = 0; static int driver_version = 0; static int driver_modification = 0; static int driver_patch = 0; +static int driver_is_old = 0; static int restore_term = 0; /* 1 => we've munged the terminal */ static struct termios inittermios; /* Initial TTY termios */ @@ -98,6 +110,8 @@ static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */ static char *lock_file; +static struct utsname utsname; /* for the kernel version */ + #define MAX_IFS 100 #define FLAGS_GOOD (IFF_UP | IFF_BROADCAST) @@ -134,22 +148,27 @@ extern u_char inpacket_buf[]; /* borrowed from main.c */ */ extern int hungup; -#define still_ppp() (hungup == 0) #ifndef LOCK_PREFIX #define LOCK_PREFIX "/var/lock/LCK.." #endif -/******************************************************************** - * - * Functions to read and set the flags value in the device driver - */ - static void set_ppp_fd (int new_fd) - { - SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", ppp_fd)); - ppp_fd = new_fd; - } +{ + SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", ppp_fd)); + ppp_fd = new_fd; +} + +static int still_ppp(void) +{ + if (!hungup || ppp_fd == slave_fd) + return 1; + if (slave_fd >= 0) { + set_ppp_fd(slave_fd); + return 1; + } + return 0; +} /******************************************************************** * @@ -217,6 +236,8 @@ void sys_init(void) die(1); } } + + uname(&utsname); } /******************************************************************** @@ -564,6 +585,12 @@ struct speed { #endif #ifdef EXTB { 38400, EXTB }, +#endif +#ifdef B230400 + { 230400, B230400 }, +#endif +#ifdef B460800 + { 460800, B460800 }, #endif { 0, 0 } }; @@ -754,7 +781,7 @@ void output (int unit, unsigned char *p, int len) { if (debug) { - log_packet(p, len, "sent "); + log_packet(p, len, "sent ", LOG_DEBUG); } if (write(ppp_fd, p, len) < 0) @@ -1258,13 +1285,13 @@ int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) if (defaultroute_exists(&rt)) { - u_int32_t old_gateway = ((struct sockaddr_in *) (&rt.rt_gateway))-> - sin_addr.s_addr; + struct in_addr old_gateway = + ((struct sockaddr_in *) (&rt.rt_gateway))-> sin_addr; - if (old_gateway != gateway) + if (old_gateway.s_addr != gateway) { syslog (LOG_ERR, - "ppp not replacing existing default route to %s[%s]", + "not replacing existing default route to %s [%s]", rt.rt_dev, inet_ntoa (old_gateway)); } @@ -1275,10 +1302,10 @@ int sifdefaultroute (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); -#if LINUX_VERSION_CODE > 0x020100 - SET_SA_FAMILY (rt.rt_genmask, AF_INET); - ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L; -#endif + if (strcmp(utsname.release, "2.1.0") > 0) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L; + } ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway; @@ -1311,10 +1338,10 @@ 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); -#if LINUX_VERSION_CODE > 0x020100 - SET_SA_FAMILY (rt.rt_genmask, AF_INET); - ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L; -#endif + if (strcmp(utsname.release, "2.1.0") > 0) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L; + } ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway; @@ -1640,7 +1667,7 @@ static void decode_version (char *buf, int *version, /******************************************************************** * - * Procedure to determine if the PPP line dicipline is registered. + * Procedure to determine if the PPP line discipline is registered. */ int @@ -1749,9 +1776,10 @@ int ppp_available(void) if (!ok) { no_ppp_msg = - "This system lacks kernel support for PPP. To include PPP support\n" - "in the kernel, please follow the steps detailed in the " - "README.linux\nfile in the ppp-2.3 distribution.\n"; + "This system lacks kernel support for PPP. This could be because\n" + "the PPP kernel module is not loaded, or because the kernel is\n" + "not configured for PPP. See the README.linux file in the\n" + "ppp-2.3.3 distribution.\n"; } /* * This is the PPP device. Validate the version of the driver at this @@ -1782,7 +1810,7 @@ int ppp_available(void) /* * Validate the version of the driver against the version that we used. */ - decode_version (PPP_VERSION, + decode_version (VERSION, &my_version, &my_modification, &my_patch); @@ -1796,7 +1824,12 @@ int ppp_available(void) /* The modification levels must be legal */ if (driver_modification < my_modification) { - ok = 0; + if (driver_modification >= 2) { + /* we can cope with 2.2.0 and above */ + driver_is_old = 1; + } else { + ok = 0; + } } close (s); @@ -2200,8 +2233,11 @@ int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr, return (0); } /* - * Set the netmask + * Set the netmask. + * For recent kernels, force the netmask to 255.255.255.255. */ + if (strcmp(utsname.release, "2.1.16") >= 0) + net_mask = ~0L; if (net_mask != 0) { ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask; @@ -2217,29 +2253,29 @@ int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr, /* * Add the device route */ -#if LINUX_VERSION_CODE < 0x020100+16 /* 2.1.16 */ - SET_SA_FAMILY (rt.rt_dst, AF_INET); - SET_SA_FAMILY (rt.rt_gateway, AF_INET); - rt.rt_dev = ifname; + if (strcmp(utsname.release, "2.1.16") < 0) { + SET_SA_FAMILY (rt.rt_dst, AF_INET); + 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; - rt.rt_flags = RTF_UP | RTF_HOST; - -#if LINUX_VERSION_CODE > 0x020100 - SET_SA_FAMILY (rt.rt_genmask, AF_INET); - ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L; -#endif + ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L; + ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr; + rt.rt_flags = RTF_UP | RTF_HOST; - if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) - { - if (! ok_error (errno)) - { - syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m(%d)", errno); - } - return (0); + if (strcmp(utsname.release, "2.1.0") > 0) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L; } -#endif + + if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) + { + if (! ok_error (errno)) + { + syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m(%d)", errno); + } + return (0); + } + } return 1; } @@ -2251,35 +2287,36 @@ int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr, int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr) { -#if LINUX_VERSION_CODE < 0x020100+16 /* 2.1.16 */ struct rtentry rt; + + if (strcmp(utsname.release, "2.1.16") < 0) { /* * Delete the route through the device */ - memset (&rt, '\0', sizeof (rt)); + memset (&rt, '\0', sizeof (rt)); - SET_SA_FAMILY (rt.rt_dst, AF_INET); - SET_SA_FAMILY (rt.rt_gateway, AF_INET); - rt.rt_dev = ifname; + SET_SA_FAMILY (rt.rt_dst, AF_INET); + 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; - rt.rt_flags = RTF_UP | RTF_HOST; + ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0; + ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr; + rt.rt_flags = RTF_UP | RTF_HOST; -#if LINUX_VERSION_CODE > 0x020100 - SET_SA_FAMILY (rt.rt_genmask, AF_INET); - ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L; -#endif - - if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) - { - if (still_ppp() && ! ok_error (errno)) - { - syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m(%d)", errno); - } - return (0); + if (strcmp(utsname.release, "2.1.0") > 0) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L; } -#endif + + if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) + { + if (still_ppp() && ! ok_error (errno)) + { + syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m(%d)", errno); + } + return (0); + } + } return 1; } @@ -2292,15 +2329,27 @@ int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr) void open_ppp_loopback(void) { - int flags; + int flags, i; struct termios tios; - if (openpty (&master_fd, &slave_fd, loop_name, NULL, NULL) < 0) - { - syslog(LOG_ERR, "No free pty for loopback"); - die(1); - } + master_fd = -1; + for (i = 0; i < 64; ++i) { + sprintf(loop_name, "/dev/pty%c%x", 'p' + i / 16, i % 16); + master_fd = open(loop_name, O_RDWR | O_NOCTTY, 0); + if (master_fd >= 0) + break; + } + if (master_fd < 0) { + syslog(LOG_ERR, "No free pty for loopback"); + die(1); + } SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name)); + loop_name[5] = 't'; + slave_fd = open(loop_name, O_RDWR | O_NOCTTY, 0); + if (slave_fd < 0) { + syslog(LOG_ERR, "Couldn't open %s for loopback: %m", loop_name); + die(1); + } set_ppp_fd(slave_fd); @@ -2402,8 +2451,6 @@ sifnpmode(u, proto, mode) } -#include - /******************************************************************** * * sipxfaddr - Config the interface IPX networknumber @@ -2517,6 +2564,30 @@ int cipxfaddr (int unit) return result; } +/* + * daemon - Detach us from controlling terminal session. + */ +int +daemon(nochdir, noclose) + int nochdir, noclose; +{ + int pid; + + if ((pid = fork()) < 0) + return -1; + if (pid != 0) + exit(0); /* parent dies */ + setsid(); + if (!nochdir) + chdir("/"); + if (!noclose) { + fclose(stdin); /* don't need stdin, stdout, stderr */ + fclose(stdout); + fclose(stderr); + } + return 0; +} + /******************************************************************** * * sys_check_options - check the options that the user specified @@ -2547,4 +2618,10 @@ sys_check_options(void) break; } #endif + if (demand && driver_is_old) { + option_error("demand dialling is not supported by kernel driver version " + "%d.%d.%d", driver_version, driver_modification, + driver_patch); + demand = 0; + } }