| … | |
… | |
| 38 | #include <cstdlib> |
38 | #include <cstdlib> |
| 39 | |
39 | |
| 40 | #include <sys/types.h> |
40 | #include <sys/types.h> |
| 41 | #include <sys/socket.h> |
41 | #include <sys/socket.h> |
| 42 | #include <sys/wait.h> |
42 | #include <sys/wait.h> |
|
|
43 | #include <sys/stat.h> |
| 43 | #include <errno.h> |
44 | #include <errno.h> |
| 44 | #include <time.h> |
45 | #include <time.h> |
| 45 | #include <unistd.h> |
46 | #include <unistd.h> |
| 46 | #include <fcntl.h> |
47 | #include <fcntl.h> |
| 47 | #include <sys/socket.h> |
48 | #include <sys/socket.h> |
| … | |
… | |
| 51 | #include "pidfile.h" |
52 | #include "pidfile.h" |
| 52 | |
53 | |
| 53 | #include "connection.h" |
54 | #include "connection.h" |
| 54 | #include "util.h" |
55 | #include "util.h" |
| 55 | #include "vpn.h" |
56 | #include "vpn.h" |
|
|
57 | |
|
|
58 | using namespace std; |
| 56 | |
59 | |
| 57 | vpn network; // THE vpn (bad design...) |
60 | vpn network; // THE vpn (bad design...) |
| 58 | |
61 | |
| 59 | ///////////////////////////////////////////////////////////////////////////// |
62 | ///////////////////////////////////////////////////////////////////////////// |
| 60 | |
63 | |
| … | |
… | |
| 392 | |
395 | |
| 393 | return 0; |
396 | return 0; |
| 394 | } |
397 | } |
| 395 | |
398 | |
| 396 | bool |
399 | bool |
|
|
400 | vpn::drop_privileges () |
|
|
401 | { |
|
|
402 | if (::conf.change_root) |
|
|
403 | { |
|
|
404 | if (!strcmp (::conf.change_root, "/")) |
|
|
405 | { |
|
|
406 | char dir [L_tmpnam]; |
|
|
407 | if (!tmpnam (dir)) |
|
|
408 | { |
|
|
409 | slog (L_CRIT, _("unable to create anonymous root path.")); |
|
|
410 | return false; |
|
|
411 | } |
|
|
412 | |
|
|
413 | if (mkdir (dir, 0700)) |
|
|
414 | { |
|
|
415 | slog (L_CRIT, _("unable to crate anonymous root directory.")); |
|
|
416 | return false; |
|
|
417 | } |
|
|
418 | |
|
|
419 | if (chdir (dir)) |
|
|
420 | { |
|
|
421 | slog (L_CRIT, _("unable to change to anonymous root directory.")); |
|
|
422 | return false; |
|
|
423 | } |
|
|
424 | |
|
|
425 | if (rmdir (dir)) |
|
|
426 | slog (L_ERR, _("unable to remove anonymous root directory, continuing.")); |
|
|
427 | } |
|
|
428 | else |
|
|
429 | { |
|
|
430 | if (chdir (::conf.change_root)) |
|
|
431 | { |
|
|
432 | slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root); |
|
|
433 | return false; |
|
|
434 | } |
|
|
435 | } |
|
|
436 | |
|
|
437 | if (chroot (".")) |
|
|
438 | { |
|
|
439 | slog (L_CRIT, _("unable to set new root directory.")); |
|
|
440 | return false; |
|
|
441 | } |
|
|
442 | |
|
|
443 | if (chdir ("/")) |
|
|
444 | { |
|
|
445 | slog (L_CRIT, _("unable to set cwd to new root directory.")); |
|
|
446 | return false; |
|
|
447 | } |
|
|
448 | } |
|
|
449 | |
|
|
450 | if (::conf.change_gid) |
|
|
451 | if (setgid (::conf.change_gid)) |
|
|
452 | { |
|
|
453 | slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid); |
|
|
454 | return false; |
|
|
455 | } |
|
|
456 | |
|
|
457 | if (::conf.change_uid) |
|
|
458 | if (setuid (::conf.change_uid)) |
|
|
459 | { |
|
|
460 | slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid); |
|
|
461 | return false; |
|
|
462 | } |
|
|
463 | |
|
|
464 | return true; |
|
|
465 | } |
|
|
466 | |
|
|
467 | bool |
| 397 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
468 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
| 398 | { |
469 | { |
| 399 | set_tos (ipv4_fd, ipv4_tos, tos); |
470 | set_tos (ipv4_fd, ipv4_tos, tos); |
| 400 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
471 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
| 401 | |
472 | |
| … | |
… | |
| 513 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
584 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
| 514 | { |
585 | { |
| 515 | switch (si.prot) |
586 | switch (si.prot) |
| 516 | { |
587 | { |
| 517 | case PROT_IPv4: |
588 | case PROT_IPv4: |
| 518 | return send_ipv4_packet (pkt, si, tos); |
589 | return send_ipv4_packet (pkt, si, tos); |
| 519 | |
590 | |
| 520 | case PROT_UDPv4: |
591 | case PROT_UDPv4: |
| 521 | return send_udpv4_packet (pkt, si, tos); |
592 | return send_udpv4_packet (pkt, si, tos); |
| 522 | |
593 | |
| 523 | #if ENABLE_TCP |
594 | #if ENABLE_TCP |
| 524 | case PROT_TCPv4: |
595 | case PROT_TCPv4: |
| 525 | return send_tcpv4_packet (pkt, si, tos); |
596 | return send_tcpv4_packet (pkt, si, tos); |
| 526 | #endif |
597 | #endif |
| 527 | #if ENABLE_ICMP |
598 | #if ENABLE_ICMP |
| 528 | case PROT_ICMPv4: |
599 | case PROT_ICMPv4: |
| 529 | return send_icmpv4_packet (pkt, si, tos); |
600 | return send_icmpv4_packet (pkt, si, tos); |
| 530 | #endif |
601 | #endif |
| 531 | #if ENABLE_DNS |
602 | #if ENABLE_DNS |
| 532 | case PROT_DNSv4: |
603 | case PROT_DNSv4: |
| 533 | return send_dnsv4_packet (pkt, si, tos); |
604 | return send_dnsv4_packet (pkt, si, tos); |
| 534 | #endif |
605 | #endif |
| 535 | default: |
606 | default: |
| 536 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
607 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
| 537 | } |
608 | } |
| 538 | |
609 | |
