commit ca538290af507833c7cd5df7f663507c3540448d Author: Sebastian Hahn sebastian@torproject.org Date: Sun May 29 00:54:59 2011 +0200

Warn when two hs use the same directory

This simple implementation has a few issues, but it should do for 0.2.2.x. We will want to revisit this later and make it smarter. --- changes/bug3289 | 5 +++++ src/or/rendservice.c | 25 +++++++++++++++++++++++++ 2 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/changes/bug3289 b/changes/bug3289 new file mode 100644 index 0000000..c469796 --- /dev/null +++ b/changes/bug3289 @@ -0,0 +1,5 @@ + o Minor bugfixes: + - Warn when the user configures two HiddenServiceDir lines that point + to the same directory. Bugfix on 0.0.6 (the version introducing + HiddenServiceDir); fixes bug 3289. + diff --git a/src/or/rendservice.c b/src/or/rendservice.c index edcf59d..a10e43f 100644 --- a/src/or/rendservice.c +++ b/src/or/rendservice.c @@ -181,6 +181,31 @@ rend_add_service(rend_service_t *service) log_warn(LD_CONFIG, "Hidden service with no ports configured; ignoring."); rend_service_free(service); } else { + int dupe = 0; + /* XXX This duplicate check has two problems: + * + * a) It's O(n^2), but the same comment from the bottom of + * rend_config_services() should apply. + * + * b) We only compare directory paths as strings, so we can't + * detect two distinct paths that specify the same directory + * (which can arise from symlinks, case-insensitivity, bind + * mounts, etc.). + * + * It also can't detect that two separate Tor instances are trying + * to use the same HiddenServiceDir; for that, we would need a + * lock file. But this is enough to detect a simple mistake that + * at least one person has actually made. + */ + SMARTLIST_FOREACH(rend_service_list, rend_service_t*, ptr, + dupe = dupe || + !strcmp(ptr->directory, service->directory)); + if (dupe) { + log_warn(LD_REND, "Another hidden service is already configured for " + "directory %s, ignoring.", service->directory); + rend_service_free(service); + return; + } smartlist_add(rend_service_list, service); log_debug(LD_REND,"Configuring service with directory "%s"", service->directory);