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https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-27 22:03:31 +01:00
Add port ranges to exit policies
svn:r899
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parent
c425f2e0ec
commit
f37f7daa2f
@ -329,7 +329,8 @@ struct exit_policy_t {
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char *string;
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uint32_t addr;
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uint32_t msk;
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uint16_t prt;
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uint16_t prt_min;
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uint16_t prt_max;
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struct exit_policy_t *next;
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};
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@ -453,16 +453,22 @@ int router_dump_router_to_string(char *s, int maxlen, routerinfo_t *router,
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return -1;
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written += result;
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}
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if (tmpe->prt) {
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result = snprintf(s+written, maxlen-written, ":%d\n", tmpe->prt);
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if (result<0 || result+written > maxlen)
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return -1;
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written += result;
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} else {
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if (tmpe->prt_min == 1 && tmpe->prt_max == 65535) {
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if (written > maxlen-4)
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return -1;
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strcat(s+written, ":*\n");
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written += 3;
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} else if (tmpe->prt_min == tmpe->prt_max) {
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result = snprintf(s+written, maxlen-written, ":%d\n", tmpe->prt_min);
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if (result<0 || result+written > maxlen)
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return -1;
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written += result;
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} else {
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result = snprintf(s+written, maxlen-written, ":%d-%d\n", tmpe->prt_min,
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tmpe->prt_max);
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if (result<0 || result+written > maxlen)
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return -1;
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written += result;
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}
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} /* end for */
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if (written > maxlen-256) /* Not enough room for signature. */
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@ -424,10 +424,10 @@ int router_compare_addr_to_exit_policy(uint32_t addr, uint16_t port,
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log_fn(LOG_DEBUG,"Considering exit policy %s", tmpe->string);
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if (!addr) {
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/* Address is unknown. */
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if (tmpe->msk == 0 && (!tmpe || port == tmpe->prt)) {
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if (tmpe->msk == 0 && (port >= tmpe->prt_min && port <= tmpe->prt_max)) {
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/* The exit policy is accept/reject *:port */
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match = 1;
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} else if ((!tmpe->prt || port == tmpe->prt) &&
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} else if (port >= tmpe->prt_min && port <= tmpe->prt_max &&
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tmpe->policy_type == EXIT_POLICY_REJECT) {
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/* The exit policy is reject ???:port */
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maybe_reject = 1;
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@ -435,7 +435,7 @@ int router_compare_addr_to_exit_policy(uint32_t addr, uint16_t port,
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} else {
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/* Address is known */
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if ( (addr & tmpe->msk) == (tmpe->addr & tmpe->msk) &&
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(!tmpe->prt || port == tmpe->prt) ) {
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(port >= tmpe->prt_min && port <= tmpe->prt_max) ) {
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/* Exact match for the policy */
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match = 1;
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}
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@ -947,23 +947,34 @@ static int router_add_exit_policy(routerinfo_t *router,
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}
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}
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if (strcmp(port, "*") == 0) {
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newe->prt = 0;
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newe->prt_min = 1;
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newe->prt_max = 65535;
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} else {
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endptr = NULL;
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newe->prt = strtol(port, &endptr, 10);
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if (*endptr) {
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newe->prt_min = strtol(port, &endptr, 10);
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if (*endptr == '-') {
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port = endptr+1;
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endptr = NULL;
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newe->prt_max = strtol(port, &endptr, 10);
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if (*endptr) {
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log_fn(LOG_WARN, "Malformed port %s on exit policy; rejecting.",
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port);
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}
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} else if (*endptr) {
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log_fn(LOG_WARN, "Malformed port %s on exit policy; rejecting.",
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port);
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goto policy_read_failed;
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} else {
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newe->prt_max = newe->prt_min;
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}
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}
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in.s_addr = htonl(newe->addr);
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address = tor_strdup(inet_ntoa(in));
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in.s_addr = htonl(newe->msk);
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log_fn(LOG_DEBUG,"%s %s/%s:%d",
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log_fn(LOG_DEBUG,"%s %s/%s:%d-%d",
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newe->policy_type == EXIT_POLICY_REJECT ? "reject" : "accept",
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address, inet_ntoa(in), newe->prt);
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address, inet_ntoa(in), newe->prt_min, newe->prt_max);
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tor_free(address);
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/* now link newe onto the end of exit_policy */
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@ -560,12 +560,12 @@ test_dir_format()
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ex1.string = NULL;
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ex1.addr = 0;
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ex1.msk = 0;
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ex1.prt = 80;
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ex1.prt_min = ex1.prt_max = 80;
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ex1.next = &ex2;
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ex2.policy_type = EXIT_POLICY_REJECT;
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ex2.addr = 18 << 24;
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ex2.msk = 0xFF000000u;
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ex2.prt = 24;
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ex2.prt_min = ex1.prt_max = 24;
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ex2.next = NULL;
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r2.address = "tor.tor.tor";
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r2.addr = 0x0a030201u; /* 10.3.2.1 */
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