package/ppp/patches/320-custom_iface_names.patch

   1 --- a/pppd/main.c
   2 +++ b/pppd/main.c
   3 @@ -743,8 +743,11 @@ void
   4  set_ifunit(iskey)
   5      int iskey;
   6  {
   7 -    info("Using interface %s%d", PPP_DRV_NAME, ifunit);
   8 -    slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
   9 +    if (use_ifname[0] == 0)
  10 +       slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
  11 +    else
  12 +       slprintf(ifname, sizeof(ifname), "%s", use_ifname);
  13 +    info("Using interface %s", ifname);
  14      script_setenv("IFNAME", ifname, iskey);
  15      if (iskey) {
  16         create_pidfile(getpid());       /* write pid to file */
  17 --- a/pppd/options.c
  18 +++ b/pppd/options.c
  19 @@ -111,6 +111,7 @@ int log_to_fd = 1;          /* send log messages
  20  bool   log_default = 1;        /* log_to_fd is default (stdout) */
  21  int    maxfail = 10;           /* max # of unsuccessful connection attempts */
  22  char   linkname[MAXPATHLEN];   /* logical name for link */
  23 +char   use_ifname[IFNAMSIZ];   /* physical name for PPP link */
  24  bool   tune_kernel;            /* may alter kernel settings */
  25  int    connect_delay = 1000;   /* wait this many ms after connect script */
  26  int    req_unit = -1;          /* requested interface unit */
  27 @@ -264,6 +265,9 @@ option_t general_options[] = {
  28      { "linkname", o_string, linkname,
  29        "Set logical name for link",
  30        OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN },
  31 +    { "ifname", o_string, use_ifname,
  32 +      "Set physical name for PPP interface",
  33 +      OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, IFNAMSIZ },
  34
  35      { "maxfail", o_int, &maxfail,
  36        "Maximum number of unsuccessful connection attempts to allow",
  37 --- a/pppd/pppd.h
  38 +++ b/pppd/pppd.h
  39 @@ -71,6 +71,10 @@
  40  #include "eui64.h"
  41  #endif
  42
  43 +#ifndef IFNAMSIZ
  44 +#define IFNAMSIZ       16
  45 +#endif
  46 +
  47  /*
  48   * Limits.
  49   */
  50 @@ -309,6 +313,7 @@ extern char *record_file;   /* File to rec
  51  extern bool    sync_serial;    /* Device is synchronous serial device */
  52  extern int     maxfail;        /* Max # of unsuccessful connection attempts */
  53  extern char    linkname[MAXPATHLEN]; /* logical name for link */
  54 +extern char    use_ifname[IFNAMSIZ]; /* physical name for PPP interface */
  55  extern bool    tune_kernel;    /* May alter kernel settings as necessary */
  56  extern int     connect_delay;  /* Time to delay after connect script */
  57  extern int     max_data_rate;  /* max bytes/sec through charshunt */
  58 --- a/pppd/sys-linux.c
  59 +++ b/pppd/sys-linux.c
  60 @@ -168,6 +168,10 @@ struct in6_ifreq {
  61  /* We can get an EIO error on an ioctl if the modem has hung up */
  62  #define ok_error(num) ((num)==EIO)
  63
  64 +#if !defined(PPP_DRV_NAME)
  65 +#define PPP_DRV_NAME   "ppp"
  66 +#endif /* !defined(PPP_DRV_NAME) */
  67 +
  68  static int tty_disc = N_TTY;   /* The TTY discipline */
  69  static int ppp_disc = N_PPP;   /* The PPP discpline */
  70  static int initfdflags = -1;   /* Initial file descriptor flags for fd */
  71 @@ -622,7 +626,8 @@ void generic_disestablish_ppp(int dev_fd
  72   */
  73  static int make_ppp_unit()
  74  {
  75 -       int x, flags;
  76 +       struct ifreq ifr;
  77 +       int x, flags, s;
  78
  79         if (ppp_dev_fd >= 0) {
  80                 dbglog("in make_ppp_unit, already had /dev/ppp open?");
  81 @@ -645,6 +650,30 @@ static int make_ppp_unit()
  82         }
  83         if (x < 0)
  84                 error("Couldn't create new ppp unit: %m");
  85 +
  86 +       if (use_ifname[0] != 0) {
  87 +               s = socket(PF_INET, SOCK_DGRAM, 0);
  88 +               if (s < 0)
  89 +                       s = socket(PF_PACKET, SOCK_DGRAM, 0);
  90 +               if (s < 0)
  91 +                       s = socket(PF_INET6, SOCK_DGRAM, 0);
  92 +               if (s < 0)
  93 +                       s = socket(PF_UNIX, SOCK_DGRAM, 0);
  94 +               if (s >= 0) {
  95 +                       slprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", PPP_DRV_NAME, ifunit);
  96 +                       slprintf(ifr.ifr_newname, sizeof(ifr.ifr_newname), "%s", use_ifname);
  97 +                       x = ioctl(s, SIOCSIFNAME, &ifr);
  98 +                       close(s);
  99 +               } else {
 100 +                       x = s;
 101 +               }
 102 +               if (x < 0) {
 103 +                       error("Couldn't rename %s to %s", ifr.ifr_name, ifr.ifr_newname);
 104 +                       close(ppp_dev_fd);
 105 +                       ppp_dev_fd = -1;
 106 +               }
 107 +       }
 108 +
 109         return x;
 110  }
 111
 112 --- a/pppstats/pppstats.c
 113 +++ b/pppstats/pppstats.c
 114 @@ -506,10 +506,12 @@ main(argc, argv)
 115      if (argc > 0)
 116         interface = argv[0];
 117
 118 +#if 0
 119      if (sscanf(interface, PPP_DRV_NAME "%d", &unit) != 1) {
 120         fprintf(stderr, "%s: invalid interface '%s' specified\n",
 121                 progname, interface);
 122      }
 123 +#endif
 124
 125  #ifndef STREAMS
 126      {