mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-23 02:04:46 +00:00
Add the -unit command line switch for specifying the tun device.
Warn about -alias being depricated (but still allow it). Don't moan twice about failing to open any tun device. Fix a diagnostic and add the -quiet switch to the usage message.
This commit is contained in:
parent
33ebc8c952
commit
c0593e34b7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=52396
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@ -599,10 +599,10 @@ bundle_UnlockTun(struct bundle *bundle)
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}
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struct bundle *
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bundle_Create(const char *prefix, int type, const char **argv)
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bundle_Create(const char *prefix, int type, int unit, const char **argv)
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{
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static struct bundle bundle; /* there can be only one */
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int enoentcount, err;
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int enoentcount, err, minunit, maxunit;
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const char *ifname;
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#ifdef KLDSYM_LOOKUP
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int kldtried;
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@ -616,12 +616,19 @@ bundle_Create(const char *prefix, int type, const char **argv)
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return NULL;
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}
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if (unit == -1) {
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minunit = 0;
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maxunit = -1;
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} else {
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minunit = unit;
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maxunit = unit + 1;
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}
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err = ENOENT;
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enoentcount = 0;
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#ifdef KLDSYM_LOOKUP
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kldtried = 0;
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#endif
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for (bundle.unit = 0; ; bundle.unit++) {
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for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) {
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snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d",
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prefix, bundle.unit);
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bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR);
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@ -629,7 +636,7 @@ bundle_Create(const char *prefix, int type, const char **argv)
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break;
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else if (errno == ENXIO) {
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#ifdef KLDSYM_LOOKUP
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if (bundle.unit == 0 && !kldtried++) {
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if (bundle.unit == minunit && !kldtried++) {
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/*
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* XXX: For some odd reason, FreeBSD (right now) allows if_tun.ko to
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* load even when the kernel contains the tun device. This lookup
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@ -658,8 +665,11 @@ bundle_Create(const char *prefix, int type, const char **argv)
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}
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if (bundle.dev.fd < 0) {
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log_Printf(LogWARN, "No available tunnel devices found (%s).\n",
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strerror(err));
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if (unit == -1)
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log_Printf(LogWARN, "No available tunnel devices found (%s)\n",
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strerror(err));
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else
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log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err));
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return NULL;
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}
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@ -142,7 +142,7 @@ struct bundle {
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#define descriptor2bundle(d) \
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((d)->type == BUNDLE_DESCRIPTOR ? (struct bundle *)(d) : NULL)
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extern struct bundle *bundle_Create(const char *, int, const char **);
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extern struct bundle *bundle_Create(const char *, int, int, const char **);
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extern void bundle_Destroy(struct bundle *);
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extern const char *bundle_PhaseName(struct bundle *);
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#define bundle_Phase(b) ((b)->phase)
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@ -118,18 +118,20 @@ iface_Create(const char *name)
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mib[5] = 0;
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if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
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fprintf(stderr, "clean: sysctl: estimate: %s\n",
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fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
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strerror(errno));
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close(s);
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return NULL;
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}
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if ((buf = (char *)malloc(needed)) == NULL) {
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fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
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close(s);
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return NULL;
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}
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if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
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fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(errno));
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free(buf);
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close(s);
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return NULL;
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@ -33,6 +33,7 @@
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <termios.h>
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@ -185,39 +186,66 @@ Usage(void)
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#ifndef NOALIAS
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" [-nat]"
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#endif
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" [system ...]\n");
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" [-quiet] [-unit N] [system ...]\n");
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exit(EX_START);
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}
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struct switches {
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unsigned nat : 1;
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unsigned fg : 1;
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unsigned quiet : 1;
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int mode;
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int unit;
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};
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static int
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ProcessArgs(int argc, char **argv, int *mode, int *nat, int *fg, int *quiet)
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ProcessArgs(int argc, char **argv, struct switches *sw)
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{
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int optc, newmode, arg;
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char *cp;
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optc = 0;
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*mode = PHYS_INTERACTIVE;
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*nat = 0;
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*fg = 0;
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*quiet = 0;
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memset(sw, '\0', sizeof *sw);
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sw->mode = PHYS_INTERACTIVE;
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sw->unit = -1;
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for (arg = 1; arg < argc && *argv[arg] == '-'; arg++, optc++) {
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cp = argv[arg] + 1;
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newmode = Nam2mode(cp);
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switch (newmode) {
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case PHYS_NONE:
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if (strcmp(cp, "nat") == 0 || strcmp(cp, "alias") == 0) {
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if (strcmp(cp, "nat") == 0) {
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#ifdef NONAT
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log_Printf(LogWARN, "Cannot load libalias (compiled out)\n");
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log_Printf(LogWARN, "%s ignored: NAT is compiled out\n", argv[arg]);
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#else
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*nat = 1;
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sw->nat = 1;
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#endif
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optc--; /* this option isn't exclusive */
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} else if (strcmp(cp, "alias") == 0) {
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#ifdef NONAT
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log_Printf(LogWARN, "%s ignored: NAT is compiled out\n", argv[arg]);
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fprintf(stderr, "%s ignored: NAT is compiled out\n", argv[arg]);
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#else
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log_Printf(LogWARN, "%s is depricated\n", argv[arg]);
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fprintf(stderr, "%s is depricated\n", argv[arg]);
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sw->nat = 1;
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#endif
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optc--; /* this option isn't exclusive */
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} else if (strncmp(cp, "unit", 4) == 0) {
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if (cp[4] == '\0') {
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if (++arg == argc) {
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fprintf(stderr, "-unit: Expected unit number\n");
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Usage();
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} else
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sw->unit = atoi(argv[arg]);
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} else
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sw->unit = atoi(cp + 4);
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} else if (strcmp(cp, "quiet") == 0) {
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*quiet = 1;
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sw->quiet = 1;
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optc--; /* this option isn't exclusive */
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} else if (strcmp(cp, "foreground") == 0) {
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*mode = PHYS_BACKGROUND; /* Kinda like background mode */
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*fg = 1;
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sw->mode = PHYS_BACKGROUND; /* Kinda like background mode */
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sw->fg = 1;
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} else
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Usage();
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break;
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break;
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default:
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*mode = newmode;
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sw->mode = newmode;
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}
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}
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exit(EX_START);
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}
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if (*mode == PHYS_AUTO && arg == argc) {
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if (sw->mode == PHYS_AUTO && arg == argc) {
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fprintf(stderr, "A system must be specified in auto mode.\n");
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exit(EX_START);
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}
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{
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char *name;
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const char *lastlabel;
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int nfds, mode, nat, fg, quiet, label, arg;
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int nfds, label, arg;
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struct bundle *bundle;
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struct prompt *prompt;
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struct switches sw;
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nfds = getdtablesize();
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if (nfds >= FD_SETSIZE)
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#ifndef NONAT
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PacketAliasInit();
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#endif
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label = ProcessArgs(argc, argv, &mode, &nat, &fg, &quiet);
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label = ProcessArgs(argc, argv, &sw);
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/*
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* A FreeBSD & OpenBSD hack to dodge a bug in the tty driver that drops
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* routing table and then run ppp in interactive mode. The `show route'
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* command will drop chunks of data !!!
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*/
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if (mode == PHYS_INTERACTIVE) {
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if (sw.mode == PHYS_INTERACTIVE) {
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close(STDIN_FILENO);
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if (open(_PATH_TTY, O_RDONLY) != STDIN_FILENO) {
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fprintf(stderr, "Cannot open %s for input !\n", _PATH_TTY);
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}
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/* Allow output for the moment (except in direct mode) */
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if (mode == PHYS_DIRECT)
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if (sw.mode == PHYS_DIRECT)
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prompt = NULL;
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else
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SignalPrompt = prompt = prompt_Create(NULL, NULL, PROMPT_STD);
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if (label < argc)
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for (arg = label; arg < argc; arg++)
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CheckLabel(argv[arg], prompt, mode);
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CheckLabel(argv[arg], prompt, sw.mode);
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else
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CheckLabel("default", prompt, mode);
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CheckLabel("default", prompt, sw.mode);
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if (!quiet)
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prompt_Printf(prompt, "Working in %s mode\n", mode2Nam(mode));
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if (!sw.quiet)
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prompt_Printf(prompt, "Working in %s mode\n", mode2Nam(sw.mode));
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if ((bundle = bundle_Create(TUN_PREFIX, mode, (const char **)argv)) == NULL) {
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log_Printf(LogWARN, "bundle_Create: %s\n", strerror(errno));
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if ((bundle = bundle_Create(TUN_PREFIX, sw.mode, sw.unit,
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(const char **)argv)) == NULL)
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return EX_START;
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}
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/* NOTE: We may now have changed argv[1] via a ``set proctitle'' */
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if (prompt) {
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prompt->bundle = bundle; /* couldn't do it earlier */
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if (!quiet)
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if (!sw.quiet)
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prompt_Printf(prompt, "Using interface: %s\n", bundle->iface->name);
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}
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SignalBundle = bundle;
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bundle->NatEnabled = nat;
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if (nat)
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bundle->NatEnabled = sw.nat;
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if (sw.nat)
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bundle->cfg.opt |= OPT_IFACEALIAS;
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if (system_Select(bundle, "default", CONFFILE, prompt, NULL) < 0)
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sig_signal(SIGALRM, SIG_IGN);
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signal(SIGPIPE, SIG_IGN);
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if (mode == PHYS_INTERACTIVE)
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if (sw.mode == PHYS_INTERACTIVE)
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sig_signal(SIGTSTP, TerminalStop);
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sig_signal(SIGUSR2, BringDownServer);
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/* In case the last label did a ``load'' */
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bundle_SetLabel(bundle, lastlabel);
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if (mode == PHYS_AUTO &&
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if (sw.mode == PHYS_AUTO &&
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bundle->ncp.ipcp.cfg.peer_range.ipaddr.s_addr == INADDR_ANY) {
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prompt_Printf(prompt, "You must ``set ifaddr'' with a peer address "
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"in auto mode.\n");
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AbortProgram(EX_START);
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}
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if (mode != PHYS_INTERACTIVE) {
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if (mode != PHYS_DIRECT) {
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if (!fg) {
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if (sw.mode != PHYS_INTERACTIVE) {
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if (sw.mode != PHYS_DIRECT) {
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if (!sw.fg) {
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int bgpipe[2];
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pid_t bgpid;
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if (mode == PHYS_BACKGROUND && pipe(bgpipe)) {
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if (sw.mode == PHYS_BACKGROUND && pipe(bgpipe)) {
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log_Printf(LogERROR, "pipe: %s\n", strerror(errno));
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AbortProgram(EX_SOCK);
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}
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@ -407,7 +435,7 @@ main(int argc, char **argv)
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if (bgpid) {
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char c = EX_NORMAL;
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if (mode == PHYS_BACKGROUND) {
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if (sw.mode == PHYS_BACKGROUND) {
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close(bgpipe[1]);
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BGPid = bgpid;
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/* If we get a signal, kill the child */
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close(bgpipe[0]);
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}
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return c;
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} else if (mode == PHYS_BACKGROUND) {
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} else if (sw.mode == PHYS_BACKGROUND) {
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close(bgpipe[0]);
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bundle->notify.fd = bgpipe[1];
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}
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close(STDOUT_FILENO);
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close(STDERR_FILENO);
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close(STDIN_FILENO);
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if (!fg)
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if (!sw.fg)
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setsid();
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} else {
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/* -direct - STDIN_FILENO gets used by physical_Open */
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@ -460,7 +488,7 @@ main(int argc, char **argv)
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prompt_Required(prompt);
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}
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log_Printf(LogPHASE, "PPP Started (%s mode).\n", mode2Nam(mode));
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log_Printf(LogPHASE, "PPP Started (%s mode).\n", mode2Nam(sw.mode));
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DoLoop(bundle);
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AbortProgram(EX_NORMAL);
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@ -8,9 +8,10 @@
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.Nd Point to Point Protocol (a.k.a. user-ppp)
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.Sh SYNOPSIS
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.Nm
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.Op Fl Va mode
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.Op Fl nat
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.Op Fl quiet
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.Op Fl Va mode
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.Op Fl unit Ns Ar N
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.Op Ar system Ns
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.No ...
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.Sh DESCRIPTION
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@ -48,6 +49,21 @@ flag tells
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to be silent at startup rather than displaying the mode and interface
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to standard output.
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.Pp
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The
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.Fl unit
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flag tells
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.Nm
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to only attempt to open
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.Pa /dev/tun Ns Ar N .
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Normally,
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.Nm
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will start with a value of 0 for
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.Ar N ,
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and keep trying to open a tunnel device by incrementing the value of
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.Ar N
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by one each time until it succeeds. If it fails three times in a row
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because the device file is missing, it gives up.
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.Pp
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The following
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.Va mode Ns No s
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are understood by
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@ -8,9 +8,10 @@
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.Nd Point to Point Protocol (a.k.a. user-ppp)
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.Sh SYNOPSIS
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.Nm
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.Op Fl Va mode
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.Op Fl nat
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.Op Fl quiet
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.Op Fl Va mode
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.Op Fl unit Ns Ar N
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.Op Ar system Ns
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.No ...
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.Sh DESCRIPTION
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@ -48,6 +49,21 @@ flag tells
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to be silent at startup rather than displaying the mode and interface
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to standard output.
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.Pp
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The
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.Fl unit
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flag tells
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.Nm
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to only attempt to open
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.Pa /dev/tun Ns Ar N .
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Normally,
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.Nm
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will start with a value of 0 for
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.Ar N ,
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and keep trying to open a tunnel device by incrementing the value of
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.Ar N
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by one each time until it succeeds. If it fails three times in a row
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because the device file is missing, it gives up.
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.Pp
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The following
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.Va mode Ns No s
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are understood by
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