#include <assert.h>
#include <ctype.h>
#include <errno.h>
+#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
_(recvfrom, ssize_t, (int, void *buf, size_t, int, \
struct sockaddr *from, socklen_t *fromlen)) \
_(sendmsg, ssize_t, (int, const struct msghdr *, int)) \
- _(recvmsg, ssize_t, (int, struct msghdr *, int))
+ _(recvmsg, ssize_t, (int, struct msghdr *, int)) \
+ _(ioctl, int, (int, unsigned long, ...))
/* Function pointers to set up. */
#define DECL(imp, ret, args) static ret (*real_##imp) args;
/* Debugging */
#ifdef DEBUG
# define D(body) { if (debug) { body } }
+# define Dpid pid_t pid = debug ? getpid() : -1
#else
# define D(body) ;
+# define Dpid
#endif
/* Preservation of error status */
const char *p;
int plen;
- fprintf(stderr, "noip: %c ", a->act ? '+' : '-');
+ fprintf(stderr, "noip(%d): %c ", getpid(), a->act ? '+' : '-');
plen = common_prefix_length(a->af, &a->minaddr, &a->maxaddr);
p = inet_ntop(a->af, &a->minaddr, buf, sizeof(buf));
fprintf(stderr, strchr(p, ':') ? "[%s]" : "%s", p);
dump_aclnode(a);
act = a->act;
}
- fprintf(stderr, "noip: [default policy: %s]\n",
+ fprintf(stderr, "noip(%d): [default policy: %s]\n", getpid(),
act == ALLOW ? "DENY" : "ALLOW");
}
{
unsigned short port = port_from_sockaddr(sa);
int act = ALLOW;
+ Dpid;
D({ char buf[ADDRBUFSZ];
- fprintf(stderr, "noip: check %s\n",
+ fprintf(stderr, "noip(%d): check %s\n", pid,
present_sockaddr(sa, 0, buf, sizeof(buf))); })
for (; a; a = a->next) {
D( dump_aclnode(a); )
if (sockaddr_in_range_p(sa, &a->minaddr, &a->maxaddr) &&
a->minport <= port && port <= a->maxport) {
- D( fprintf(stderr, "noip: aha! %s\n", a->act ? "ALLOW" : "DENY"); )
+ D( fprintf(stderr, "noip(%d): aha! %s\n", pid,
+ a->act ? "ALLOW" : "DENY"); )
return (a->act);
}
act = a->act;
}
- D( fprintf(stderr, "noip: nothing found: %s\n", act ? "DENY" : "ALLOW"); )
+ D( fprintf(stderr, "noip(%d): nothing found: %s\n", pid,
+ act ? "DENY" : "ALLOW"); )
return (!act);
}
char buf[ADDRBUFSZ];
int rc;
- D( fprintf(stderr, "noip: encode %s (%s)",
+ D( fprintf(stderr, "noip(%d): encode %s (%s)", getpid(),
present_sockaddr(sa, 0, buf, sizeof(buf)),
want == WANT_EXISTING ? "EXISTING" : "FRESH"); )
sun->sun_family = AF_UNIX;
if (len > sizeof(*sun)) return (-1);
((char *)sun)[len] = 0;
nn = strlen(sun->sun_path);
- D( fprintf(stderr, "noip: decode `%s'", sun->sun_path); )
+ D( fprintf(stderr, "noip(%d): decode `%s'", getpid(), sun->sun_path); )
if (af_hint && !sun->sun_path[0]) {
wildcard_address(af_hint, sa);
D( fprintf(stderr, " -- unbound socket\n"); )
/* SK is (or at least might be) a Unix-domain socket we created when an
* Internet socket was asked for. We've decided it should be an Internet
- * socket after all, with family AF_HINT, so convert it.
+ * socket after all, with family AF_HINT, so convert it. If TMP is not null,
+ * then don't replace the existing descriptor: store the new socket in *TMP
+ * and return zero.
*/
-static int fixup_real_ip_socket(int sk, int af_hint)
+static int fixup_real_ip_socket(int sk, int af_hint, int *tmp)
{
int nsk;
int type;
} while (0);
OPTS(FIX)
#undef FIX
- if ((f = fcntl(sk, F_GETFL)) < 0 ||
- (fd = fcntl(sk, F_GETFD)) < 0 ||
- fcntl(nsk, F_SETFL, f) < 0 ||
- dup2(nsk, sk) < 0) {
+ if (tmp)
+ *tmp = nsk;
+ else {
+ if ((f = fcntl(sk, F_GETFL)) < 0 ||
+ (fd = fcntl(sk, F_GETFD)) < 0 ||
+ fcntl(nsk, F_SETFL, f) < 0 ||
+ dup2(nsk, sk) < 0) {
+ close(nsk);
+ return (-1);
+ }
+ unlink(sun.sun_path);
close(nsk);
- return (-1);
- }
- unlink(sun.sun_path);
- close(nsk);
- if (fcntl(sk, F_SETFD, fd) < 0) {
- perror("noip: fixup_real_ip_socket F_SETFD");
- abort();
+ if (fcntl(sk, F_SETFD, fd) < 0) {
+ perror("noip: fixup_real_ip_socket F_SETFD");
+ abort();
+ }
}
return (0);
}
socklen_t mylen = sizeof(*sun);
if (acl_allows_p(connect_real, *sa)) {
- if (fixup_real_ip_socket(sk, (*sa)->sa_family)) return (-1);
+ if (fixup_real_ip_socket(sk, (*sa)->sa_family, 0)) return (-1);
} else {
if (real_getsockname(sk, SA(sun), &mylen) < 0) return (-1);
if (sun->sun_family == AF_UNIX) {
maxaddr = minaddr;
mask_address(af, &minaddr, n, 0);
mask_address(af, &maxaddr, n, 1);
+ RESCAN(del);
} else
maxaddr = minaddr;
parse_ports(&p, &minport, &maxport);
if (*p != ',') break;
if (*p) p++;
}
+ if (*p) goto bad;
*pp = p;
return;
bad:
- D( fprintf(stderr, "noip: bad acl spec (ignored)\n"); )
+ D( fprintf(stderr, "noip(%d): bad acl spec (ignored)\n", getpid()); )
return;
}
if (*p != '-') goto bad; p++;
NEXTNUMBER(q, del); y = strtoul(q, 0, 0); RESCAN(del);
minautoport = x; maxautoport = y;
+ SKIPSPC; if (*p) goto bad;
*pp = p;
return;
bad:
- D( fprintf(stderr, "bad port range (ignored)\n"); )
+ D( fprintf(stderr, "noip(%d): bad port range (ignored)\n", getpid()); )
return;
}
char buf[1024];
size_t n;
char *p, *q, *cmd;
+ Dpid;
parse_acl_env("NOIP_REALBIND_BEFORE", &bind_tail);
parse_acl_env("NOIP_REALCONNECT_BEFORE", &connect_tail);
}
if ((p = getenv("NOIP_CONFIG")) == 0)
snprintf(p = buf, sizeof(buf), "%s/.noip", home());
- D( fprintf(stderr, "noip: config file: %s\n", p); )
+ D( fprintf(stderr, "noip(%d): config file: %s\n", pid, p); )
if ((fp = fopen(p, "r")) == 0) {
- D( fprintf(stderr, "noip: couldn't read config: %s\n",
- strerror(errno)); )
+ D( fprintf(stderr, "noip(%d): couldn't read config: %s\n",
+ pid, strerror(errno)); )
goto done;
}
while (fgets(buf, sizeof(buf), fp)) {
snprintf(buf, sizeof(buf), "%s/noip-%s", tmpdir(), user());
sockdir = xstrdup(buf);
}
- D( fprintf(stderr, "noip: socketdir: %s\n", sockdir);
- fprintf(stderr, "noip: autoports: %u-%u\n",
- minautoport, maxautoport);
- fprintf(stderr, "noip: realbind acl:\n");
+ D( fprintf(stderr, "noip(%d): socketdir: %s\n", pid, sockdir);
+ fprintf(stderr, "noip(%d): autoports: %u-%u\n",
+ pid, minautoport, maxautoport);
+ fprintf(stderr, "noip(%d): realbind acl:\n", pid);
dump_acl(bind_real);
- fprintf(stderr, "noip: realconnect acl:\n");
+ fprintf(stderr, "noip(%d): realconnect acl:\n", pid);
dump_acl(connect_real); )
}
if (family_known_p(sa->sa_family)) {
PRESERVING_ERRNO({
if (acl_allows_p(bind_real, sa)) {
- if (fixup_real_ip_socket(sk, sa->sa_family))
+ if (fixup_real_ip_socket(sk, sa->sa_family, 0))
return (-1);
} else {
encode_inet_addr(&sun, sa, WANT_FRESH);
return (real_setsockopt(sk, lev, opt, p, len));
}
+int ioctl(int fd, unsigned long op, ...)
+{
+ va_list ap;
+ void *arg;
+ int sk;
+ int rc;
+
+ va_start(ap, op);
+ arg = va_arg(ap, void *);
+
+ switch (op) {
+ case SIOCGIFADDR:
+ case SIOCGIFBRDADDR:
+ case SIOCGIFDSTADDR:
+ case SIOCGIFNETMASK:
+ PRESERVING_ERRNO({
+ if (fixup_real_ip_socket(fd, AF_INET, &sk)) goto real;
+ });
+ rc = real_ioctl(sk, op, arg);
+ PRESERVING_ERRNO({ close(sk); });
+ break;
+ default:
+ real:
+ rc = real_ioctl(fd, op, arg);
+ break;
+ }
+ va_end(ap);
+ return (rc);
+}
+
/*----- Initialization ----------------------------------------------------*/
/* Clean up the socket directory, deleting stale sockets. */
address addr;
struct sockaddr_un sun;
struct stat st;
+ Dpid;
if ((dir = opendir(sockdir)) == 0) return;
sun.sun_family = AF_UNIX;
if (decode_inet_addr(&addr.sa, 0, &sun, SUN_LEN(&sun)) ||
stat(sun.sun_path, &st) ||
!S_ISSOCK(st.st_mode)) {
- D( fprintf(stderr, "noip: ignoring unknown socketdir entry `%s'\n",
- sun.sun_path); )
+ D( fprintf(stderr, "noip(%d): ignoring unknown socketdir entry `%s'\n",
+ pid, sun.sun_path); )
continue;
}
if (unix_socket_status(&sun, 0) == STALE) {
- D( fprintf(stderr, "noip: clearing away stale socket %s\n",
- d->d_name); )
+ D( fprintf(stderr, "noip(%d): clearing away stale socket %s\n",
+ pid, d->d_name); )
unlink(sun.sun_path);
}
}
struct ifaddrs *ifa_head, *ifa;
ipaddr a;
int i;
+ Dpid;
+ D( fprintf(stderr, "noip(%d): fetching local addresses...\n", pid); )
if (getifaddrs(&ifa_head)) { perror("getifaddrs"); return; }
for (n_local_ipaddrs = 0, ifa = ifa_head;
n_local_ipaddrs < MAX_LOCAL_IPADDRS && ifa;
continue;
ipaddr_from_sockaddr(&a, ifa->ifa_addr);
D({ char buf[ADDRBUFSZ];
- fprintf(stderr, "noip: local addr %s = %s", ifa->ifa_name,
+ fprintf(stderr, "noip(%d): local addr %s = %s", pid,
+ ifa->ifa_name,
inet_ntop(ifa->ifa_addr->sa_family, &a,
buf, sizeof(buf))); })
for (i = 0; i < n_local_ipaddrs; i++) {
~mdw / preload-hacks / blobdiff