diff options
Diffstat (limited to 'dom/media/webrtc/transport/third_party/nICEr/src/stun/stun_util.c')
| -rw-r--r-- | dom/media/webrtc/transport/third_party/nICEr/src/stun/stun_util.c | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/dom/media/webrtc/transport/third_party/nICEr/src/stun/stun_util.c b/dom/media/webrtc/transport/third_party/nICEr/src/stun/stun_util.c new file mode 100644 index 0000000000..cbb0128924 --- /dev/null +++ b/dom/media/webrtc/transport/third_party/nICEr/src/stun/stun_util.c @@ -0,0 +1,352 @@ +/* +Copyright (c) 2007, Adobe Systems, Incorporated +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +* Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +* Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +* Neither the name of Adobe Systems, Network Resonance nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#include <errno.h> +#include <csi_platform.h> + +#ifdef WIN32 +#include <winsock2.h> +#include <stdlib.h> +#include <io.h> +#include <time.h> +#else /* UNIX */ +#include <string.h> +#endif /* end UNIX */ +#include <assert.h> + +#include "stun.h" +#include "stun_reg.h" +#include "registry.h" +#include "addrs.h" +#include "transport_addr_reg.h" +#include "nr_crypto.h" +#include "hex.h" + + +int NR_LOG_STUN = 0; + +int +nr_stun_startup(void) +{ + int r,_status; + + if ((r=r_log_register("stun", &NR_LOG_STUN))) + ABORT(r); + + _status=0; + abort: + return _status; +} + +int +nr_stun_xor_mapped_address(UINT4 magicCookie, UINT12 transactionId, nr_transport_addr *from, nr_transport_addr *to) +{ + int _status; + + switch (from->ip_version) { + case NR_IPV4: + nr_ip4_port_to_transport_addr( + (ntohl(from->u.addr4.sin_addr.s_addr) ^ magicCookie), + (ntohs(from->u.addr4.sin_port) ^ (magicCookie>>16)), + from->protocol, to); + break; + case NR_IPV6: + { + union { + unsigned char addr[16]; + UINT4 addr32[4]; + } maskedAddr; + + maskedAddr.addr32[0] = htonl(magicCookie); /* Passed in host byte order */ + memcpy(&maskedAddr.addr32[1], transactionId.octet, sizeof(transactionId)); + + /* We now have the mask in network byte order */ + /* Xor the address in network byte order */ + for (size_t i = 0; i < sizeof(maskedAddr); ++i) { + maskedAddr.addr[i] ^= from->u.addr6.sin6_addr.s6_addr[i]; + } + + nr_ip6_port_to_transport_addr( + (struct in6_addr*)&maskedAddr, + (ntohs(from->u.addr6.sin6_port) ^ (magicCookie>>16)), + from->protocol, to); + } + break; + default: + assert(0); + ABORT(R_INTERNAL); + break; + } + + _status = 0; + abort: + return _status; +} + +int +nr_stun_filter_local_addresses(nr_local_addr addrs[], int *count) +{ + int r,_status; + char allow_loopback = 0; + char allow_link_local = 0; + + if ((r=NR_reg_get_char(NR_STUN_REG_PREF_ALLOW_LOOPBACK_ADDRS, + &allow_loopback))) { + if (r != R_NOT_FOUND) { + ABORT(r); + } + } + + if ((r=NR_reg_get_char(NR_STUN_REG_PREF_ALLOW_LINK_LOCAL_ADDRS, + &allow_link_local))) { + if (r != R_NOT_FOUND) { + ABORT(r); + } + } + + if ((r=nr_stun_filter_addrs(addrs, + !allow_loopback, + !allow_link_local, + count))) { + ABORT(r); + } + + _status=0; + abort: + return _status; +} + +int +nr_stun_find_local_addresses(nr_local_addr addrs[], int maxaddrs, int *count) +{ + int r,_status; + //NR_registry *children = 0; + + *count = 0; + +#if 0 + // this really goes with the code commented out below. (mjf) + if ((r=NR_reg_get_child_count(NR_STUN_REG_PREF_ADDRESS_PRFX, (unsigned int*)count))) + if (r != R_NOT_FOUND) + ABORT(r); +#endif + + if (*count == 0) { + if ((r=nr_stun_get_addrs(addrs, maxaddrs, count))) + ABORT(r); + + goto done; + } + + if (*count >= maxaddrs) { + r_log(NR_LOG_STUN, LOG_INFO, "Address list truncated from %d to %d", *count, maxaddrs); + *count = maxaddrs; + } + +#if 0 + if (*count > 0) { + /* TODO(ekr@rtfm.com): Commented out 2012-07-26. + + This code is currently not used in Firefox and needs to be + ported to 64-bit */ + children = RCALLOC((*count + 10) * sizeof(*children)); + if (!children) + ABORT(R_NO_MEMORY); + + assert(sizeof(size_t) == sizeof(*count)); + + if ((r=NR_reg_get_children(NR_STUN_REG_PREF_ADDRESS_PRFX, children, (size_t)(*count + 10), (size_t*)count))) + ABORT(r); + + for (i = 0; i < *count; ++i) { + if ((r=nr_reg_get_transport_addr(children[i], 0, &addrs[i].addr))) + ABORT(r); + } + } +#endif + + done: + + _status=0; + abort: + //RFREE(children); + return _status; +} + +int +nr_stun_different_transaction(UCHAR *msg, size_t len, nr_stun_message *req) +{ + int _status; + nr_stun_message_header header; + char reqid[44]; + char msgid[44]; + size_t unused; + + if (sizeof(header) > len) + ABORT(R_FAILED); + + assert(sizeof(header.id) == sizeof(UINT12)); + + memcpy(&header, msg, sizeof(header)); + + if (memcmp(&req->header.id, &header.id, sizeof(header.id))) { + nr_nbin2hex((UCHAR*)&req->header.id, sizeof(req->header.id), reqid, sizeof(reqid), &unused); + nr_nbin2hex((UCHAR*)&header.id, sizeof(header.id), msgid, sizeof(msgid), &unused); + r_log(NR_LOG_STUN, LOG_DEBUG, "Mismatched message IDs %s/%s", reqid, msgid); + ABORT(R_NOT_FOUND); + } + + _status=0; + abort: + return _status; +} + +char* +nr_stun_msg_type(int type) +{ + char *ret = 0; + + switch (type) { + case NR_STUN_MSG_BINDING_REQUEST: + ret = "BINDING-REQUEST"; + break; + case NR_STUN_MSG_BINDING_INDICATION: + ret = "BINDING-INDICATION"; + break; + case NR_STUN_MSG_BINDING_RESPONSE: + ret = "BINDING-RESPONSE"; + break; + case NR_STUN_MSG_BINDING_ERROR_RESPONSE: + ret = "BINDING-ERROR-RESPONSE"; + break; + +#ifdef USE_TURN + case NR_STUN_MSG_ALLOCATE_REQUEST: + ret = "ALLOCATE-REQUEST"; + break; + case NR_STUN_MSG_ALLOCATE_RESPONSE: + ret = "ALLOCATE-RESPONSE"; + break; + case NR_STUN_MSG_ALLOCATE_ERROR_RESPONSE: + ret = "ALLOCATE-ERROR-RESPONSE"; + break; + case NR_STUN_MSG_REFRESH_REQUEST: + ret = "REFRESH-REQUEST"; + break; + case NR_STUN_MSG_REFRESH_RESPONSE: + ret = "REFRESH-RESPONSE"; + break; + case NR_STUN_MSG_REFRESH_ERROR_RESPONSE: + ret = "REFRESH-ERROR-RESPONSE"; + break; + case NR_STUN_MSG_SEND_INDICATION: + ret = "SEND-INDICATION"; + break; + case NR_STUN_MSG_DATA_INDICATION: + ret = "DATA-INDICATION"; + break; + case NR_STUN_MSG_PERMISSION_REQUEST: + ret = "PERMISSION-REQUEST"; + break; + case NR_STUN_MSG_PERMISSION_RESPONSE: + ret = "PERMISSION-RESPONSE"; + break; + case NR_STUN_MSG_PERMISSION_ERROR_RESPONSE: + ret = "PERMISSION-ERROR-RESPONSE"; + break; +#endif /* USE_TURN */ + + default: + /* ret remains 0 */ + break; + } + + return ret; +} + +int +nr_random_alphanum(char *alphanum, int size) +{ + static char alphanums[256] = { + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', + 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', + 'U', 'V', 'W', 'X', 'Y', 'Z', + 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', + 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', + 'u', 'v', 'w', 'x', 'y', 'z', + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', + 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', + 'U', 'V', 'W', 'X', 'Y', 'Z', + 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', + 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', + 'u', 'v', 'w', 'x', 'y', 'z', + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', + 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', + 'U', 'V', 'W', 'X', 'Y', 'Z', + 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', + 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', + 'u', 'v', 'w', 'x', 'y', 'z', + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', + 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', + 'U', 'V', 'W', 'X', 'Y', 'Z', + 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', + 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', + 'u', 'v', 'w', 'x', 'y', 'z', + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H' }; + int i; + + nr_crypto_random_bytes((UCHAR*)alphanum, size); + + /* now convert from binary to alphanumeric */ + for (i = 0; i < size; ++i) + alphanum[i] = alphanums[(UCHAR)alphanum[i]]; + + return 0; +} + +#ifndef UINT2_MAX +#define UINT2_MAX ((UINT2)(65535U)) +#endif + +void nr_accumulate_count(UINT2* orig_count, UINT2 add_count) + { + if (UINT2_MAX - add_count < *orig_count) { + // don't rollover, just stop accumulating at MAX value + *orig_count = UINT2_MAX; + } else { + *orig_count += add_count; + } + } |