tor-commits December 2018

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14 participants
1480 discussions

[tor/master] Remember to close the child process' ends of the pipes.
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit 1d8dcb416c989ad86a1e3ae2aa92f4c2c1339183 Author: Alexander Færøy <ahf(a)torproject.org> Date: Thu Dec 20 12:47:04 2018 +0100 Remember to close the child process' ends of the pipes. This prevents us from leaking the HANDLE for stdout, stderr, and stdin. See: https://bugs.torproject.org/28179 --- src/lib/process/process_win32.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/lib/process/process_win32.c b/src/lib/process/process_win32.c index c92b0975a..a09664b50 100644 --- a/src/lib/process/process_win32.c +++ b/src/lib/process/process_win32.c @@ -248,6 +248,11 @@ process_win32_exec(process_t *process) win32_process->stderr_handle.pipe = stderr_pipe_read; win32_process->stdin_handle.pipe = stdin_pipe_write; + /* Close our ends of the pipes that is now owned by the child process. */ + CloseHandle(stdout_pipe_write); + CloseHandle(stderr_pipe_write); + CloseHandle(stdin_pipe_read); + /* Used by the callback functions from ReadFileEx() and WriteFileEx() such * that we can figure out which process_t that was responsible for the event. *

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[tor/master] Make example CancelIoEx() code use CancelIo().
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit 412fbe9f177f742e0e56df612f44261f6771973a Author: Alexander Færøy <ahf(a)torproject.org> Date: Thu Dec 20 13:11:24 2018 +0100 Make example CancelIoEx() code use CancelIo(). This patch changes the CancelIoEx() example code to use CancelIo(), which is available for older versions of Windows too. I still think the kernel handles this nicely by sending broken pipes if either side closes the pipe while I/O operations are pending. See: https://bugs.torproject.org/28179 --- src/lib/process/process_win32.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/src/lib/process/process_win32.c b/src/lib/process/process_win32.c index 3b4373f42..641af2bb0 100644 --- a/src/lib/process/process_win32.c +++ b/src/lib/process/process_win32.c @@ -720,31 +720,24 @@ process_win32_cleanup_handle(process_win32_handle_t *handle) tor_assert(handle); #if 0 - /* FIXME(ahf): My compiler does not set _WIN32_WINNT to a high enough value - * for this code to be available. Should we force it? CancelIoEx() is - * available from Windows 7 and above. If we decide to require this, we need - * to update the checks in all the three I/O completion callbacks to handle - * the ERROR_OPERATION_ABORTED as well as ERROR_BROKEN_PIPE. */ - -#if _WIN32_WINNT >= 0x0600 - /* This code is only supported from Windows 7 and onwards. */ BOOL ret; DWORD error_code; - /* Cancel any pending I/O requests. */ - ret = CancelIoEx(handle->pipe, &handle->overlapped); + /* Cancel any pending I/O requests: This means that instead of getting + * ERROR_BROKEN_PIPE we get ERROR_OPERATION_ABORTED, but it doesn't seem + * like this is needed. */ + ret = CancelIo(handle->pipe); if (! ret) { error_code = GetLastError(); /* There was no pending I/O requests for our handle. */ if (error_code != ERROR_NOT_FOUND) { - log_warn(LD_PROCESS, "CancelIoEx() failed: %s", + log_warn(LD_PROCESS, "CancelIo() failed: %s", format_win32_error(error_code)); } } #endif -#endif /* Close our handle. */ if (handle->pipe != INVALID_HANDLE_VALUE) {

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[tor/master] Handle ERROR_BROKEN_PIPE in completion routines.
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit f58e597d42c204e25101143f9618d55aef666edc Author: Alexander Færøy <ahf(a)torproject.org> Date: Thu Dec 20 13:04:49 2018 +0100 Handle ERROR_BROKEN_PIPE in completion routines. Handle `ERROR_BROKEN_PIPE` from ReadFileEx() and WriteFileEx() in process_win32_stdin_write_done() and process_win32_handle_read_completion() instead of in the early handler. This most importantmly makes sure that `reached_eof` is set to true when these errors appears. See: https://bugs.torproject.org/28179 --- src/lib/process/process_win32.c | 37 ++++++------------------------------- 1 file changed, 6 insertions(+), 31 deletions(-) diff --git a/src/lib/process/process_win32.c b/src/lib/process/process_win32.c index 358765f79..3b4373f42 100644 --- a/src/lib/process/process_win32.c +++ b/src/lib/process/process_win32.c @@ -765,15 +765,6 @@ process_win32_stdout_read_done(DWORD error_code, tor_assert(overlapped); tor_assert(overlapped->hEvent); - /* This happens when we have asked ReadFileEx() to read some data, but we - * then decided to call CloseHandle() on the HANDLE. This can happen if - * someone runs process_free() in the exit_callback of process_t, which means - * we cannot call process_get_win32_process() here. */ - if (error_code == ERROR_BROKEN_PIPE) { - log_debug(LD_PROCESS, "Process reported broken pipe on standard out"); - return; - } - /* Extract our process_t from the hEvent member of OVERLAPPED. */ process_t *process = (process_t *)overlapped->hEvent; process_win32_t *win32_process = process_get_win32_process(process); @@ -797,15 +788,6 @@ process_win32_stderr_read_done(DWORD error_code, tor_assert(overlapped); tor_assert(overlapped->hEvent); - /* This happens when we have asked ReadFileEx() to read some data, but we - * then decided to call CloseHandle() on the HANDLE. This can happen if - * someone runs process_free() in the exit_callback of process_t, which means - * we cannot call process_get_win32_process() here. */ - if (error_code == ERROR_BROKEN_PIPE) { - log_debug(LD_PROCESS, "Process reported broken pipe on standard error"); - return; - } - /* Extract our process_t from the hEvent member of OVERLAPPED. */ process_t *process = (process_t *)overlapped->hEvent; process_win32_t *win32_process = process_get_win32_process(process); @@ -831,15 +813,6 @@ process_win32_stdin_write_done(DWORD error_code, (void)byte_count; - /* This happens when we have asked WriteFileEx() to write some data, but we - * then decided to call CloseHandle() on the HANDLE. This can happen if - * someone runs process_free() in the exit_callback of process_t, which means - * we cannot call process_get_win32_process() here. */ - if (error_code == ERROR_BROKEN_PIPE) { - log_debug(LD_PROCESS, "Process reported broken pipe on standard input"); - return; - } - process_t *process = (process_t *)overlapped->hEvent; process_win32_t *win32_process = process_get_win32_process(process); @@ -860,7 +833,8 @@ process_win32_stdin_write_done(DWORD error_code, /* Schedule the next write. */ process_notify_event_stdin(process); - } else if (error_code == ERROR_HANDLE_EOF) { + } else if (error_code == ERROR_HANDLE_EOF || + error_code == ERROR_BROKEN_PIPE) { /* Our WriteFileEx() call was succesful, but we reached the end of our * file. We mark our handle as having reached EOF and returns. */ tor_assert(byte_count == 0); @@ -983,9 +957,10 @@ process_win32_handle_read_completion(process_win32_handle_t *handle, /* Tell our caller to schedule the next read. */ return true; - } else if (error_code == ERROR_HANDLE_EOF) { - /* Our ReadFileEx() call was succesful, but we reached the end of our file. - * We mark our handle as having reached EOF and returns. */ + } else if (error_code == ERROR_HANDLE_EOF || + error_code == ERROR_BROKEN_PIPE) { + /* Our ReadFileEx() finished, but we reached the end of our file. We mark + * our handle as having reached EOF and returns. */ tor_assert(byte_count == 0); handle->reached_eof = true;

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[tor/master] No need to log ordinary EOF conditions as LOG_WARN.
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit 776208896756651519fd6540103c73a369b6d485 Author: Alexander Færøy <ahf(a)torproject.org> Date: Thu Dec 20 13:12:53 2018 +0100 No need to log ordinary EOF conditions as LOG_WARN. Let's not use log_warn() when a pipe is closed under what should be considered normal conditions. See: https://bugs.torproject.org/28179 --- src/lib/process/process_win32.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/src/lib/process/process_win32.c b/src/lib/process/process_win32.c index 641af2bb0..d8a895875 100644 --- a/src/lib/process/process_win32.c +++ b/src/lib/process/process_win32.c @@ -365,8 +365,17 @@ process_win32_write(struct process_t *process, buf_t *buffer) process_win32_stdin_write_done); if (! ret) { - log_warn(LD_PROCESS, "WriteFileEx() failed: %s", - format_win32_error(GetLastError())); + error_code = GetLastError(); + + /* No need to log at warning level for these two. */ + if (error_code == ERROR_HANDLE_EOF || error_code == ERROR_BROKEN_PIPE) { + log_debug(LD_PROCESS, "WriteFileEx() returned EOF from pipe: %s", + format_win32_error(error_code)); + } else { + log_warn(LD_PROCESS, "WriteFileEx() failed: %s", + format_win32_error(error_code)); + } + win32_process->stdin_handle.reached_eof = true; return 0; } @@ -897,8 +906,17 @@ process_win32_read_from_handle(process_win32_handle_t *handle, callback); if (! ret) { - log_warn(LD_PROCESS, "ReadFileEx() failed: %s", - format_win32_error(GetLastError())); + error_code = GetLastError(); + + /* No need to log at warning level for these two. */ + if (error_code == ERROR_HANDLE_EOF || error_code == ERROR_BROKEN_PIPE) { + log_debug(LD_PROCESS, "ReadFileEx() returned EOF from pipe: %s", + format_win32_error(error_code)); + } else { + log_warn(LD_PROCESS, "ReadFileEx() failed: %s", + format_win32_error(error_code)); + } + handle->reached_eof = true; return bytes_available; }

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[tor/master] Merge remote-tracking branch 'tor-github/pr/608'
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit 5c85ba3077a7ee90b2ac73b1b1afd6555e718382 Merge: 973a5db80 776208896 Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Dec 20 11:42:26 2018 -0500 Merge remote-tracking branch 'tor-github/pr/608' src/lib/process/process_win32.c | 160 ++++++++++++++++++++++++++++------------ src/test/test_process_slow.c | 1 + 2 files changed, 114 insertions(+), 47 deletions(-)

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[fuzzing-corpora/master] Add new fuzz_strop cases (base32?)
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit a6b615a5c5bff3d26dbe7568e5abd45a1510763b Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Dec 20 09:09:02 2018 -0500 Add new fuzz_strop cases (base32?) --- ...f5474fd732d6cde475ab4bf73d411645f7029cd2f22c9523a4adb84 | 3 +++ ...2c631ef67718bbba1c9e71082b69200ff9bd96e4768c7ca1a05892e | Bin 0 -> 64 bytes ...fec59ad78ae136ce3e1a0b5131f8ca05946568f207f64095a35c73e | Bin 0 -> 9 bytes ...fa8f5d234a5a8b232296af100985d17b54d122fbb23e078a2ed2067 | Bin 0 -> 29 bytes ...005e1e20b81ebee6bcdd589808a46c1e1e7f37dbc9a933071deee12 | 2 ++ 5 files changed, 5 insertions(+) diff --git a/strops/1bb1cddbff5474fd732d6cde475ab4bf73d411645f7029cd2f22c9523a4adb84 b/strops/1bb1cddbff5474fd732d6cde475ab4bf73d411645f7029cd2f22c9523a4adb84 new file mode 100644 index 0000000..b7fb7a4 --- /dev/null +++ b/strops/1bb1cddbff5474fd732d6cde475ab4bf73d411645f7029cd2f22c9523a4adb84 @@ -0,0 +1,3 @@ +ÿÿ rmmmmm=: m=: m:= mm=: m=: mm=: m=: m=ÿ +:= m +:= mm=: m=: mm= \ No newline at end of file diff --git a/strops/5674f46c52c631ef67718bbba1c9e71082b69200ff9bd96e4768c7ca1a05892e b/strops/5674f46c52c631ef67718bbba1c9e71082b69200ff9bd96e4768c7ca1a05892e new file mode 100644 index 0000000..747169c Binary files /dev/null and b/strops/5674f46c52c631ef67718bbba1c9e71082b69200ff9bd96e4768c7ca1a05892e differ diff --git a/strops/75dcde3dcfec59ad78ae136ce3e1a0b5131f8ca05946568f207f64095a35c73e b/strops/75dcde3dcfec59ad78ae136ce3e1a0b5131f8ca05946568f207f64095a35c73e new file mode 100644 index 0000000..c3a4af5 Binary files /dev/null and b/strops/75dcde3dcfec59ad78ae136ce3e1a0b5131f8ca05946568f207f64095a35c73e differ diff --git a/strops/8ee3a1f1afa8f5d234a5a8b232296af100985d17b54d122fbb23e078a2ed2067 b/strops/8ee3a1f1afa8f5d234a5a8b232296af100985d17b54d122fbb23e078a2ed2067 new file mode 100644 index 0000000..52cf04e Binary files /dev/null and b/strops/8ee3a1f1afa8f5d234a5a8b232296af100985d17b54d122fbb23e078a2ed2067 differ diff --git a/strops/96c21813d005e1e20b81ebee6bcdd589808a46c1e1e7f37dbc9a933071deee12 b/strops/96c21813d005e1e20b81ebee6bcdd589808a46c1e1e7f37dbc9a933071deee12 new file mode 100644 index 0000000..d642fe5 --- /dev/null +++ b/strops/96c21813d005e1e20b81ebee6bcdd589808a46c1e1e7f37dbc9a933071deee12 @@ -0,0 +1,2 @@ +ÿÿ rmmmmm=: m=: mm=: m:= mm=: m=: mm=: m=: m=ÿ +:= mm=: m=: mm= \ No newline at end of file

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[webwml/master] deactivate job postings (#28907, #28908)
by hiro＠torproject.org 20 Dec '18

20 Dec '18

commit fef41936ba802fee67656f59956ba4f340162047 Author: traumschule <traumschuleriebau(a)riseup.net> Date: Wed Dec 19 20:55:12 2018 -0500 deactivate job postings (#28907, #28908) --- about/en/jobs.wml | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/about/en/jobs.wml b/about/en/jobs.wml index 583ece67..d082a48d 100644 --- a/about/en/jobs.wml +++ b/about/en/jobs.wml @@ -15,12 +15,11 @@ # At the moment, we don't have any official open positions. Please check back soon, though! In the meantime, you may want to glance at our # <a href="<page getinvolved/volunteer>">volunteers</a> page. +  In the past, we looked for the following people: @@ -46,6 +45,9 @@ <li>Bookkeeper/Payroll Specialist</li> <li>Grants Manager</li> <li>Grant Writer</li> + <li>Metrics data architect</li> + <li>Senior Systems Administrator</li> + <li>Software Developer</li> </ul> About the company:

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[metrics-web/master] Remove two unused R files from censorship detector.
by karsten＠torproject.org 20 Dec '18

20 Dec '18

commit c0a18aab9092c57f107732cb2f97f034909e94d9 Author: Karsten Loesing <karsten.loesing(a)gmx.net> Date: Thu Dec 20 14:09:24 2018 +0100 Remove two unused R files from censorship detector. Still part of #21588. --- src/main/R/clients/merge-clients.R | 19 ------------------- src/main/R/clients/userstats-detector.R | 18 ------------------ 2 files changed, 37 deletions(-) diff --git a/src/main/R/clients/merge-clients.R b/src/main/R/clients/merge-clients.R deleted file mode 100644 index cce7e9d..0000000 --- a/src/main/R/clients/merge-clients.R +++ /dev/null @@ -1,19 +0,0 @@ -require(reshape) -r <- read.csv("userstats-ranges.csv", stringsAsFactors = FALSE) -r <- melt(r, id.vars = c("date", "country")) -r <- data.frame(date = r$date, node = "relay", country = r$country, - transport = "", version = "", - variable = ifelse(r$variable == "maxusers", "upper", "lower"), - value = floor(r$value)) -u <- read.csv("userstats.csv", stringsAsFactors = FALSE) -u <- melt(u, id.vars = c("date", "node", "country", "transport", - "version")) -u <- data.frame(date = u$date, node = u$node, country = u$country, - transport = u$transport, version = u$version, - variable = ifelse(u$variable == "frac", "frac", "clients"), - value = u$value) -c <- rbind(r, u) -c <- cast(c, date + node + country + transport + version ~ variable) -c <- c[order(as.Date(c$date), c$node, c$country, c$transport, c$version), ] -write.csv(c, "clients.csv", quote = FALSE, row.names = FALSE, na = "") - diff --git a/src/main/R/clients/userstats-detector.R b/src/main/R/clients/userstats-detector.R deleted file mode 100644 index c3a9041..0000000 --- a/src/main/R/clients/userstats-detector.R +++ /dev/null @@ -1,18 +0,0 @@ -library("reshape") -export_userstats_detector <- function(path) { - c <- read.csv("userstats.csv", stringsAsFactors = FALSE) - c <- c[c$country != '' & c$transport == '' & c$version == '' & - c$node == 'relay', ] - u <- data.frame(country = c$country, date = c$date, users = c$users, - stringsAsFactors = FALSE) - u <- rbind(u, data.frame(country = "zy", - aggregate(list(users = u$users), - by = list(date = u$date), sum))) - u <- data.frame(date = u$date, country = u$country, - users = floor(u$users)) - u <- cast(u, date ~ country, value = "users") - names(u)[names(u) == "zy"] <- "all" - write.csv(u, path, quote = FALSE, row.names = FALSE) -} -export_userstats_detector("userstats-detector.csv") -

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[tor/master] Use trunnel for NETINFO cell parsing
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit d3e6112bb2536f0437cabc3e675177a95d3e374c Author: rl1987 <rl1987(a)sdf.lonestar.org> Date: Fri Sep 21 14:58:19 2018 +0300 Use trunnel for NETINFO cell parsing --- src/core/or/channeltls.c | 94 +++++++++++++++++++++++++++++++++++------------- 1 file changed, 70 insertions(+), 24 deletions(-) diff --git a/src/core/or/channeltls.c b/src/core/or/channeltls.c index 883acacf3..392e78506 100644 --- a/src/core/or/channeltls.c +++ b/src/core/or/channeltls.c @@ -59,6 +59,7 @@ #include "feature/nodelist/torcert.h" #include "feature/nodelist/networkstatus.h" #include "trunnel/channelpadding_negotiation.h" +#include "trunnel/netinfo.h" #include "core/or/channelpadding.h" #include "core/or/cell_st.h" @@ -1637,6 +1638,35 @@ channel_tls_process_padding_negotiate_cell(cell_t *cell, channel_tls_t *chan) } /** + * Convert netinfo_addr into corresponding tor_addr. + * Return 0 on success; on failure, return -1 and log a warning. + */ +static int +tor_addr_from_netinfo_addr(tor_addr_t *tor_addr, + const netinfo_addr_t *netinfo_addr) { + tor_assert(tor_addr); + tor_assert(netinfo_addr); + + uint8_t type = netinfo_addr_get_addr_type(netinfo_addr); + uint8_t len = netinfo_addr_get_len(netinfo_addr); + + if (type == NETINFO_ADDR_TYPE_IPV4 && len == 4) { + uint32_t ipv4 = netinfo_addr_get_addr_ipv4(netinfo_addr); + tor_addr_from_ipv4h(tor_addr, ipv4); + } else if (type == NETINFO_ADDR_TYPE_IPV6 && len == 16) { + const uint8_t *ipv6_bytes = netinfo_addr_getconstarray_addr_ipv6( + netinfo_addr); + tor_addr_from_ipv6_bytes(tor_addr, (const char *)ipv6_bytes); + } else { + log_fn(LOG_PROTOCOL_WARN, LD_OR, "Cannot read address from NETINFO " + "- wrong type/length."); + return -1; + } + + return 0; +} + +/** * Process a 'netinfo' cell. * * This function is called to handle an incoming NETINFO cell; read and act @@ -1648,8 +1678,6 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) time_t timestamp; uint8_t my_addr_type; uint8_t my_addr_len; - const uint8_t *my_addr_ptr; - const uint8_t *cp, *end; uint8_t n_other_addrs; time_t now = time(NULL); const routerinfo_t *me = router_get_my_routerinfo(); @@ -1720,34 +1748,48 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) } /* Decode the cell. */ - timestamp = ntohl(get_uint32(cell->payload)); - if (labs(now - chan->conn->handshake_state->sent_versions_at) < 180) { - apparent_skew = now - timestamp; + netinfo_cell_t *netinfo_cell = NULL; + + ssize_t parsed = netinfo_cell_parse(&netinfo_cell, cell->payload, + CELL_PAYLOAD_SIZE); + + if (parsed < 0) { + log_fn(LOG_PROTOCOL_WARN, LD_OR, + "Failed to parse NETINFO cell - closing connection."); + connection_or_close_for_error(chan->conn, 0); + return; } - my_addr_type = (uint8_t) cell->payload[4]; - my_addr_len = (uint8_t) cell->payload[5]; - my_addr_ptr = (uint8_t*) cell->payload + 6; - end = cell->payload + CELL_PAYLOAD_SIZE; - cp = cell->payload + 6 + my_addr_len; + timestamp = netinfo_cell_get_timestamp(netinfo_cell); + + const netinfo_addr_t *my_addr = + netinfo_cell_getconst_other_addr(netinfo_cell); + my_addr_type = netinfo_addr_get_addr_type(my_addr); + my_addr_len = netinfo_addr_get_len(my_addr); + + if (labs(now - chan->conn->handshake_state->sent_versions_at) < 180) { + apparent_skew = now - timestamp; + } /* We used to check: * if (my_addr_len >= CELL_PAYLOAD_SIZE - 6) { * * This is actually never going to happen, since my_addr_len is at most 255, * and CELL_PAYLOAD_LEN - 6 is 503. So we know that cp is < end. */ - if (my_addr_type == RESOLVED_TYPE_IPV4 && my_addr_len == 4) { - tor_addr_from_ipv4n(&my_apparent_addr, get_uint32(my_addr_ptr)); + if (tor_addr_from_netinfo_addr(&my_apparent_addr, my_addr) == -1) { + connection_or_close_for_error(chan->conn, 0); + netinfo_cell_free(netinfo_cell); + return; + } + if (my_addr_type == NETINFO_ADDR_TYPE_IPV4 && my_addr_len == 4) { if (!get_options()->BridgeRelay && me && - get_uint32(my_addr_ptr) == htonl(me->addr)) { + tor_addr_eq_ipv4h(&my_apparent_addr, me->addr)) { TLS_CHAN_TO_BASE(chan)->is_canonical_to_peer = 1; } - - } else if (my_addr_type == RESOLVED_TYPE_IPV6 && my_addr_len == 16) { - tor_addr_from_ipv6_bytes(&my_apparent_addr, (const char *) my_addr_ptr); - + } else if (my_addr_type == NETINFO_ADDR_TYPE_IPV6 && + my_addr_len == 16) { if (!get_options()->BridgeRelay && me && !tor_addr_is_null(&me->ipv6_addr) && tor_addr_eq(&my_apparent_addr, &me->ipv6_addr)) { @@ -1755,17 +1797,21 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) } } - n_other_addrs = (uint8_t) *cp++; - while (n_other_addrs && cp < end-2) { + n_other_addrs = netinfo_cell_get_n_my_addrs(netinfo_cell); + for (uint8_t i = 0; i < n_other_addrs; i++) { /* Consider all the other addresses; if any matches, this connection is * "canonical." */ + + const netinfo_addr_t *netinfo_addr = + netinfo_cell_getconst_my_addrs(netinfo_cell, i); + tor_addr_t addr; - const uint8_t *next = - decode_address_from_payload(&addr, cp, (int)(end-cp)); - if (next == NULL) { + + if (tor_addr_from_netinfo_addr(&addr, netinfo_addr) == -1) { log_fn(LOG_PROTOCOL_WARN, LD_OR, "Bad address in netinfo cell; closing connection."); connection_or_close_for_error(chan->conn, 0); + netinfo_cell_free(netinfo_cell); return; } /* A relay can connect from anywhere and be canonical, so @@ -1779,10 +1825,10 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) connection_or_set_canonical(chan->conn, 1); break; } - cp = next; - --n_other_addrs; } + netinfo_cell_free(netinfo_cell); + if (me && !TLS_CHAN_TO_BASE(chan)->is_canonical_to_peer && channel_is_canonical(TLS_CHAN_TO_BASE(chan))) { const char *descr =

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[tor/master] Generate NETINFO cell using trunnel
by nickm＠torproject.org 20 Dec '18

20 Dec '18

commit 5cc86e364f4efbaa39b599e007765fc1770c8010 Author: rl1987 <rl1987(a)sdf.lonestar.org> Date: Fri Sep 21 17:56:39 2018 +0300 Generate NETINFO cell using trunnel --- src/core/or/connection_or.c | 82 +++++++++++++++++++++++++++++++++------------ 1 file changed, 61 insertions(+), 21 deletions(-) diff --git a/src/core/or/connection_or.c b/src/core/or/connection_or.c index 65f4e28c9..274cf8590 100644 --- a/src/core/or/connection_or.c +++ b/src/core/or/connection_or.c @@ -46,6 +46,7 @@ #include "lib/geoip/geoip.h" #include "core/mainloop/mainloop.h" #include "trunnel/link_handshake.h" +#include "trunnel/netinfo.h" #include "feature/nodelist/microdesc.h" #include "feature/nodelist/networkstatus.h" #include "feature/nodelist/nodelist.h" @@ -2428,6 +2429,31 @@ connection_or_send_versions(or_connection_t *conn, int v3_plus) return 0; } +static netinfo_addr_t * +netinfo_addr_from_tor_addr(const tor_addr_t *tor_addr) +{ + sa_family_t addr_family = tor_addr_family(tor_addr); + + if (BUG(addr_family != AF_INET && addr_family != AF_INET6)) + return NULL; + + netinfo_addr_t *netinfo_addr = netinfo_addr_new(); + + if (addr_family == AF_INET) { + netinfo_addr_set_addr_type(netinfo_addr, NETINFO_ADDR_TYPE_IPV4); + netinfo_addr_set_len(netinfo_addr, 4); + netinfo_addr_set_addr_ipv4(netinfo_addr, tor_addr_to_ipv4h(tor_addr)); + } else if (addr_family == AF_INET6) { + netinfo_addr_set_addr_type(netinfo_addr, NETINFO_ADDR_TYPE_IPV6); + netinfo_addr_set_len(netinfo_addr, 16); + uint8_t *ipv6_buf = netinfo_addr_getarray_addr_ipv6(netinfo_addr); + const uint8_t *in6_addr = tor_addr_to_in6_addr8(tor_addr); + memcpy(ipv6_buf, in6_addr, 16); + } + + return netinfo_addr; +} + /** Send a NETINFO cell on conn, telling the other server what we know * about their address, our address, and the current time. */ MOCK_IMPL(int, @@ -2436,8 +2462,7 @@ connection_or_send_netinfo,(or_connection_t *conn)) cell_t cell; time_t now = time(NULL); const routerinfo_t *me; - int len; - uint8_t *out; + int r = -1; tor_assert(conn->handshake_state); @@ -2450,20 +2475,21 @@ connection_or_send_netinfo,(or_connection_t *conn)) memset(&cell, 0, sizeof(cell_t)); cell.command = CELL_NETINFO; + netinfo_cell_t *netinfo_cell = netinfo_cell_new(); + /* Timestamp, if we're a relay. */ if (public_server_mode(get_options()) || ! conn->is_outgoing) - set_uint32(cell.payload, htonl((uint32_t)now)); + netinfo_cell_set_timestamp(netinfo_cell, (uint32_t)now); /* Their address. */ - out = cell.payload + 4; + const tor_addr_t *remote_tor_addr = + !tor_addr_is_null(&conn->real_addr) ? &conn->real_addr : &conn->base_.addr; /* We use &conn->real_addr below, unless it hasn't yet been set. If it * hasn't yet been set, we know that base_.addr hasn't been tampered with * yet either. */ - len = append_address_to_payload(out, !tor_addr_is_null(&conn->real_addr) - ? &conn->real_addr : &conn->base_.addr); - if (len<0) - return -1; - out += len; + netinfo_addr_t *their_addr = netinfo_addr_from_tor_addr(remote_tor_addr); + + netinfo_cell_set_other_addr(netinfo_cell, their_addr); /* My address -- only include it if I'm a public relay, or if I'm a * bridge and this is an incoming connection. If I'm a bridge and this @@ -2471,28 +2497,42 @@ connection_or_send_netinfo,(or_connection_t *conn)) if ((public_server_mode(get_options()) || !conn->is_outgoing) && (me = router_get_my_routerinfo())) { tor_addr_t my_addr; - *out++ = 1 + !tor_addr_is_null(&me->ipv6_addr); - tor_addr_from_ipv4h(&my_addr, me->addr); - len = append_address_to_payload(out, &my_addr); - if (len < 0) - return -1; - out += len; + + uint8_t n_my_addrs = 1 + !tor_addr_is_null(&me->ipv6_addr); + netinfo_cell_set_n_my_addrs(netinfo_cell, n_my_addrs); + + netinfo_cell_add_my_addrs(netinfo_cell, + netinfo_addr_from_tor_addr(&my_addr)); if (!tor_addr_is_null(&me->ipv6_addr)) { - len = append_address_to_payload(out, &me->ipv6_addr); - if (len < 0) - return -1; + netinfo_cell_add_my_addrs(netinfo_cell, + netinfo_addr_from_tor_addr(&me->ipv6_addr)); } - } else { - *out = 0; + } + + const char *errmsg = NULL; + if ((errmsg = netinfo_cell_check(netinfo_cell))) { + log_warn(LD_OR, "Failed to validate NETINFO cell with error: %s", + errmsg); + goto cleanup; + } + + if (netinfo_cell_encode(cell.payload, CELL_PAYLOAD_SIZE, + netinfo_cell) < 0) { + log_warn(LD_OR, "Failed generating NETINFO cell"); + goto cleanup; } conn->handshake_state->digest_sent_data = 0; conn->handshake_state->sent_netinfo = 1; connection_or_write_cell_to_buf(&cell, conn); - return 0; + r = 0; + cleanup: + netinfo_cell_free(netinfo_cell); + + return r; } /** Helper used to add an encoded certs to a cert cell */

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tor-commits December 2018