static void
set_socks_server(const char *socks)
{
struct url *url;
enum socks_ver socksv;
url = url_tokenize(socks);
if (!url || !url->scheme) {
log_error("shim: bad socks server, %s", socks);
exit(1);
}
if (url->port < 0)
url->port = 1080;
if (!evutil_ascii_strcasecmp(url->scheme, "socks4"))
socksv = SOCKS_4;
else if (!evutil_ascii_strcasecmp(url->scheme, "socks4a"))
socksv = SOCKS_4a;
else {
log_error("shim: unknown socks version, %s",
url->scheme);
exit(1);
}
if (conn_set_socks_server(url->host, url->port, socksv) < 0)
exit(1);
url_free(url);
}
/** Return true if the list of headers in 'headers', intepreted with respect
* to flags, means that we should send a "connection: close" when the request
* is done. */
static int
evhttp_is_connection_close(int flags, struct evkeyvalq* headers)
{
if (flags & EVHTTP_PROXY_REQUEST) {
/* proxy connection */
const char *connection = evhttp_find_header(headers, "Proxy-Connection");
return (connection == NULL || evutil_ascii_strcasecmp(connection, "keep-alive") != 0);
} else {
const char *connection = evhttp_find_header(headers, "Connection");
return (connection != NULL && evutil_ascii_strcasecmp(connection, "close") == 0);
}
}
static void
start_listening(struct event_base *base, struct evdns_base *dns,
const char *laddr, const char *lport)
{
struct evutil_addrinfo hints;
struct evutil_addrinfo *ai = NULL;
int ret;
if (!evutil_ascii_strcasecmp(laddr, "any"))
laddr = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
/* turn NULL hostname into INADDR_ANY, and skip looking up any address
* types we don't have an interface to connect to. */
hints.ai_flags = EVUTIL_AI_PASSIVE|EVUTIL_AI_ADDRCONFIG;
ret = evutil_getaddrinfo(laddr, lport, &hints, &ai);
if (ret < 0) {
log_error("shim: bad listen address: %s",
evutil_gai_strerror(ret));
exit(1);
}
if (proxy_init(base, dns, ai->ai_addr, ai->ai_addrlen) < 0)
exit(1);
}
static void
fail_server_cb(struct evdns_server_request *req, void *data)
{
const char *question;
int *count = data;
struct in_addr in;
/* Drop the first N requests that we get. */
if (*count > 0) {
--*count;
tt_want(! evdns_server_request_drop(req));
return;
}
if (req->nquestions != 1)
TT_DIE(("Only handling one question at a time; got %d",
req->nquestions));
question = req->questions[0]->name;
if (!evutil_ascii_strcasecmp(question, "google.com")) {
/* Detect a probe, and get out of the loop. */
event_base_loopexit(exit_base, NULL);
}
evutil_inet_pton(AF_INET, "16.32.64.128", &in);
evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
100);
tt_assert(! evdns_server_request_respond(req, 0))
return;
end:
tt_want(! evdns_server_request_drop(req));
}
int main(int argc, char **argv)
{
struct evdns_base *dns;
struct event_base *base;
struct bufferevent *bev;
struct url *socks, *host;
int s4;
base = event_base_new();
dns = evdns_base_new(base, 1);
log_set_file(NULL);
log_set_min_level(LOG_DEBUG);
if (argc >= 3) {
socks = url_tokenize(argv[2]);
s4 = !evutil_ascii_strcasecmp("socks4", socks->scheme);
if (conn_set_socks_server(socks->host, socks->port, s4?
SOCKS_4 : SOCKS_4a) < 0)
return 0;
}
host = url_connect_tokenize(argv[1]);
bev = bufferevent_socket_new(base, -1, BEV_OPT_CLOSE_ON_FREE);
conn_connect_bufferevent(bev, dns, AF_INET, host->host, host->port,
do_connect, NULL);
event_base_dispatch(base);
return 0;
}
void
regress_dns_server_cb(struct evdns_server_request *req, void *data)
{
struct regress_dns_server_table *tab = data;
const char *question;
if (req->nquestions != 1)
TT_DIE(("Only handling one question at a time; got %d",
req->nquestions));
question = req->questions[0]->name;
while (tab->q && evutil_ascii_strcasecmp(question, tab->q) &&
strcmp("*", tab->q))
++tab;
if (tab->q == NULL)
TT_DIE(("Unexpected question: '%s'", question));
++tab->seen;
if (!strcmp(tab->anstype, "err")) {
int err = atoi(tab->ans);
tt_assert(! evdns_server_request_respond(req, err));
return;
} else if (!strcmp(tab->anstype, "errsoa")) {
int err = atoi(tab->ans);
char soa_record[] =
"\x04" "dns1" "\x05" "icann" "\x03" "org" "\0"
"\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0"
"\x77\xde\x5e\xba" /* serial */
"\x00\x00\x1c\x20" /* refreshtime = 2h */
"\x00\x00\x0e\x10" /* retry = 1h */
"\x00\x12\x75\x00" /* expiration = 14d */
"\x00\x00\x0e\x10" /* min.ttl = 1h */
;
evdns_server_request_add_reply(
req, EVDNS_AUTHORITY_SECTION,
"example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET,
42, sizeof(soa_record) - 1, 0, soa_record);
tt_assert(! evdns_server_request_respond(req, err));
return;
} else if (!strcmp(tab->anstype, "A")) {
struct in_addr in;
evutil_inet_pton(AF_INET, tab->ans, &in);
evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
100);
} else if (!strcmp(tab->anstype, "AAAA")) {
struct in6_addr in6;
evutil_inet_pton(AF_INET6, tab->ans, &in6);
evdns_server_request_add_aaaa_reply(req,
question, 1, &in6.s6_addr, 100);
} else {
TT_DIE(("Weird table entry with type '%s'", tab->anstype));
}
tt_assert(! evdns_server_request_respond(req, 0))
return;
end:
tt_want(! evdns_server_request_drop(req));
}
/**
* @brief guess_type It returns a HTTP type by guessing the file type.
*
* @param type Input a file type.
*
* @return Const string of type.
*/
static const char * guess_type(const char *type)
{
const struct table_entry *ent;
for (ent = &content_type_table[0]; ent->extension; ++ent) {
if (!evutil_ascii_strcasecmp(ent->extension, type))
return ent->content_type;
}
return "application/misc";
}
/* Try to guess a good content-type for 'path' */
static const char *guess_content_type(const char *path)
{
const char *last_period, *extension;
const struct table_entry *ent;
last_period = strrchr(path, '.');
if (!last_period || strchr(last_period, '/'))
goto not_found; /* no exension */
extension = last_period + 1;
for (ent = &content_type_table[0]; ent->extension; ++ent) {
if (!evutil_ascii_strcasecmp(ent->extension, extension))
return ent->content_type;
}
not_found:
return "application/octet-stream";
}
static void
process_line(struct bufferevent *bev, void *ctx, char *line)
{
char **argv;
int argc = split_args(line, &argv);
int i;
for (i = 0; cmdlist[i].cmd; i++)
if (evutil_ascii_strcasecmp(line, cmdlist[i].cmd) == 0)
break;
(cmdlist[i].func)(bev, ctx, argc - 1, argv + 1);
free(argv);
free(line);
}
void
regress_dns_server_cb(struct evdns_server_request *req, void *data)
{
struct regress_dns_server_table *tab = data;
const char *question;
if (req->nquestions != 1)
TT_DIE(("Only handling one question at a time; got %d",
req->nquestions));
question = req->questions[0]->name;
while (tab->q && evutil_ascii_strcasecmp(question, tab->q) &&
strcmp("*", tab->q))
++tab;
if (tab->q == NULL)
TT_DIE(("Unexpected question: '%s'", question));
++tab->seen;
if (!strcmp(tab->anstype, "err")) {
int err = atoi(tab->ans);
tt_assert(! evdns_server_request_respond(req, err));
return;
} else if (!strcmp(tab->anstype, "A")) {
struct in_addr in;
evutil_inet_pton(AF_INET, tab->ans, &in);
evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
100);
} else if (!strcmp(tab->anstype, "AAAA")) {
struct in6_addr in6;
evutil_inet_pton(AF_INET6, tab->ans, &in6);
evdns_server_request_add_aaaa_reply(req,
question, 1, &in6.s6_addr, 100);
} else {
TT_DIE(("Weird table entry with type '%s'", tab->anstype));
}
tt_assert(! evdns_server_request_respond(req, 0))
return;
end:
tt_want(! evdns_server_request_drop(req));
}
static
const char*
cd_GuessContentType (const char* path)
{
const char* lastPeriod = strrchr(path, '.');
const char* extension;
const CDContentType* type;
if (lastPeriod == NULL || strchr(lastPeriod, '/')) {
goto end;
}
extension = lastPeriod + 1;
for (type = CDContentTypes; type->extension; type++) {
if (!evutil_ascii_strcasecmp(type->extension, extension)) {
return type->mime;
}
}
end: {
return "application/octet-stream";
}
}
/* Try to guess a good content-type for 'path' */
static const char *guess_mime_type(const char *path)
{
char buf[12] = {0};
char *pos = NULL;
const char *last_period, *extension;
const struct table_entry *ent;
last_period = strrchr(path, '.');
if (!last_period || strchr(last_period, '/'))
goto not_found; /* no exension */
extension = last_period + 1;
strncpy(buf, extension, sizeof(buf)-1);
pos = strpbrk(buf, "?#");
if (pos)
*pos = '\0';
for (ent = &content_type_table[0]; ent->extension; ++ent)
{
if (!evutil_ascii_strcasecmp(ent->extension, buf))
return ent->content_type;
}
not_found:
return "application/octet-stream";
}
tt_str_op(buf, ==, "-200000000000");
tt_int_op(r, ==, 13);
r = evutil_snprintf(buf, sizeof(buf), EV_SIZE_FMT" "EV_SSIZE_FMT,
EV_SIZE_ARG(size), EV_SSIZE_ARG(ssize));
tt_str_op(buf, ==, "8000 -9000");
tt_int_op(r, ==, 10);
end:
;
}
static void
test_evutil_casecmp(void *ptr)
{
tt_int_op(evutil_ascii_strcasecmp("ABC", "ABC"), ==, 0);
tt_int_op(evutil_ascii_strcasecmp("ABC", "abc"), ==, 0);
tt_int_op(evutil_ascii_strcasecmp("ABC", "abcd"), <, 0);
tt_int_op(evutil_ascii_strcasecmp("ABC", "abb"), >, 0);
tt_int_op(evutil_ascii_strcasecmp("ABCd", "abc"), >, 0);
tt_int_op(evutil_ascii_strncasecmp("Libevent", "LibEvEnT", 100), ==, 0);
tt_int_op(evutil_ascii_strncasecmp("Libevent", "LibEvEnT", 4), ==, 0);
tt_int_op(evutil_ascii_strncasecmp("Libevent", "LibEXXXX", 4), ==, 0);
tt_int_op(evutil_ascii_strncasecmp("Libevent", "LibE", 4), ==, 0);
tt_int_op(evutil_ascii_strncasecmp("Libe", "LibEvEnT", 4), ==, 0);
tt_int_op(evutil_ascii_strncasecmp("Lib", "LibEvEnT", 4), <, 0);
tt_int_op(evutil_ascii_strncasecmp("abc", "def", 99), <, 0);
tt_int_op(evutil_ascii_strncasecmp("Z", "qrst", 1), >, 0);
end:
;
static int
options_parse_resolver(ProxyContext * const proxy_context,
char * const * const headers, const size_t headers_count,
char * const * const cols, const size_t cols_count)
{
const char *dnssec;
const char *namecoin;
const char *nologs;
const char *provider_name;
const char *provider_publickey_s;
const char *resolver_ip;
const char *resolver_name;
resolver_name = options_get_col(headers, headers_count,
cols, cols_count, "Name");
if (resolver_name == NULL) {
logger(proxy_context, LOG_ERR,
"Invalid resolvers list file: missing 'Name' column");
exit(1);
}
if (*resolver_name == 0) {
logger(proxy_context, LOG_ERR, "Resolver with an empty name");
return -1;
}
if (evutil_ascii_strcasecmp(resolver_name,
proxy_context->resolver_name) != 0) {
return 0;
}
provider_name = options_get_col(headers, headers_count,
cols, cols_count, "Provider name");
provider_publickey_s = options_get_col(headers, headers_count,
cols, cols_count,
"Provider public key");
resolver_ip = options_get_col(headers, headers_count,
cols, cols_count, "Resolver address");
if (provider_name == NULL || *provider_name == 0) {
logger(proxy_context, LOG_ERR,
"Resolvers list is missing a provider name for [%s]",
resolver_name);
return -1;
}
if (provider_publickey_s == NULL || *provider_publickey_s == 0) {
logger(proxy_context, LOG_ERR,
"Resolvers list is missing a public key for [%s]",
resolver_name);
return -1;
}
if (resolver_ip == NULL || *resolver_ip == 0) {
logger(proxy_context, LOG_ERR,
"Resolvers list is missing a resolver address for [%s]",
resolver_name);
return -1;
}
dnssec = options_get_col(headers, headers_count,
cols, cols_count, "DNSSEC validation");
if (dnssec != NULL && evutil_ascii_strcasecmp(dnssec, "yes") != 0) {
logger(proxy_context, LOG_INFO,
"- [%s] does not support DNS Security Extensions",
resolver_name);
} else {
logger(proxy_context, LOG_INFO,
"+ DNS Security Extensions are supported");
}
namecoin = options_get_col(headers, headers_count,
cols, cols_count, "Namecoin");
if (namecoin != NULL && evutil_ascii_strcasecmp(namecoin, "yes") == 0) {
logger(proxy_context, LOG_INFO,
"+ Namecoin domains can be resolved");
}
nologs = options_get_col(headers, headers_count,
cols, cols_count, "No logs");
if (nologs != NULL && evutil_ascii_strcasecmp(nologs, "no") == 0) {
logger(proxy_context, LOG_WARNING,
"- [%s] logs your activity - "
"a different provider might be better a choice if privacy is a concern",
resolver_name);
} else {
logger(proxy_context, LOG_INFO,
"+ Provider supposedly doesn't keep logs");
}
proxy_context->provider_name = strdup(provider_name);
proxy_context->provider_publickey_s = strdup(provider_publickey_s);
proxy_context->resolver_ip = strdup(resolver_ip);
if (proxy_context->provider_name == NULL ||
proxy_context->provider_publickey_s == NULL ||
proxy_context->resolver_ip == NULL) {
logger_noformat(proxy_context, LOG_EMERG, "Out of memory");
exit(1);
}
return 1;
}
/* Implements a DNS server for the connect_hostname test and the
* getaddrinfo_async test */
static void
be_getaddrinfo_server_cb(struct evdns_server_request *req, void *data)
{
int i;
int *n_got_p=data;
int added_any=0;
++*n_got_p;
for (i=0;i<req->nquestions;++i) {
const int qtype = req->questions[i]->type;
const int qclass = req->questions[i]->dns_question_class;
const char *qname = req->questions[i]->name;
struct in_addr ans;
struct in6_addr ans6;
memset(&ans6, 0, sizeof(ans6));
if (qtype == EVDNS_TYPE_A &&
qclass == EVDNS_CLASS_INET &&
!evutil_ascii_strcasecmp(qname, "nobodaddy.example.com")) {
ans.s_addr = htonl(0x7f000001);
evdns_server_request_add_a_reply(req, qname,
1, &ans.s_addr, 2000);
added_any = 1;
} else if (!evutil_ascii_strcasecmp(qname,
"nosuchplace.example.com")) {
/* ok, just say notfound. */
} else if (!evutil_ascii_strcasecmp(qname,
"both.example.com")) {
if (qtype == EVDNS_TYPE_A) {
ans.s_addr = htonl(0x50502020);
evdns_server_request_add_a_reply(req, qname,
1, &ans.s_addr, 2000);
added_any = 1;
} else if (qtype == EVDNS_TYPE_AAAA) {
ans6.s6_addr[0] = 0x80;
ans6.s6_addr[1] = 0xff;
ans6.s6_addr[14] = 0xbb;
ans6.s6_addr[15] = 0xbb;
evdns_server_request_add_aaaa_reply(req, qname,
1, &ans6.s6_addr, 2000);
added_any = 1;
}
evdns_server_request_add_cname_reply(req, qname,
"both-canonical.example.com", 1000);
} else if (!evutil_ascii_strcasecmp(qname,
"v4only.example.com") ||
!evutil_ascii_strcasecmp(qname, "v4assert.example.com")) {
if (qtype == EVDNS_TYPE_A) {
ans.s_addr = htonl(0x12345678);
evdns_server_request_add_a_reply(req, qname,
1, &ans.s_addr, 2000);
added_any = 1;
} else if (!evutil_ascii_strcasecmp(qname,
"v4assert.example.com")) {
TT_FAIL(("Got an AAAA request for v4assert"));
}
} else if (!evutil_ascii_strcasecmp(qname,
"v6only.example.com") ||
!evutil_ascii_strcasecmp(qname, "v6assert.example.com")) {
if (qtype == EVDNS_TYPE_AAAA) {
ans6.s6_addr[0] = 0x0b;
ans6.s6_addr[1] = 0x0b;
ans6.s6_addr[14] = 0xf0;
ans6.s6_addr[15] = 0x0d;
evdns_server_request_add_aaaa_reply(req, qname,
1, &ans6.s6_addr, 2000);
added_any = 1;
} else if (!evutil_ascii_strcasecmp(qname,
"v6assert.example.com")) {
TT_FAIL(("Got a A request for v6assert"));
}
} else if (!evutil_ascii_strcasecmp(qname,
"v6timeout.example.com")) {
if (qtype == EVDNS_TYPE_A) {
ans.s_addr = htonl(0xabcdef01);
evdns_server_request_add_a_reply(req, qname,
1, &ans.s_addr, 2000);
added_any = 1;
} else if (qtype == EVDNS_TYPE_AAAA) {
/* Let the v6 request time out.*/
evdns_server_request_drop(req);
return;
}
} else if (!evutil_ascii_strcasecmp(qname,
"v4timeout.example.com")) {
if (qtype == EVDNS_TYPE_AAAA) {
ans6.s6_addr[0] = 0x0a;
ans6.s6_addr[1] = 0x0a;
ans6.s6_addr[14] = 0xff;
ans6.s6_addr[15] = 0x01;
evdns_server_request_add_aaaa_reply(req, qname,
1, &ans6.s6_addr, 2000);
added_any = 1;
} else if (qtype == EVDNS_TYPE_A) {
/* Let the v4 request time out.*/
evdns_server_request_drop(req);
return;
}
} else if (!evutil_ascii_strcasecmp(qname,
"v6timeout-nonexist.example.com")) {
if (qtype == EVDNS_TYPE_A) {
/* Fall through, give an nexist. */
} else if (qtype == EVDNS_TYPE_AAAA) {
/* Let the v6 request time out.*/
evdns_server_request_drop(req);
return;
}
} else if (!evutil_ascii_strcasecmp(qname,
"all-timeout.example.com")) {
/* drop all requests */
evdns_server_request_drop(req);
return;
} else {
TT_GRIPE(("Got weird request for %s",qname));
}
}
if (added_any)
evdns_server_request_respond(req, 0);
else
evdns_server_request_respond(req, 3);
}
static void
dns_server_request_cb(struct evdns_server_request *req, void *data)
{
int i, r;
const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa";
const char TEST_IN6[] =
"f.e.f.e." "0.0.0.0." "0.0.0.0." "1.1.1.1."
"a.a.a.a." "0.0.0.0." "0.0.0.0." "0.f.f.f.ip6.arpa";
for (i = 0; i < req->nquestions; ++i) {
const int qtype = req->questions[i]->type;
const int qclass = req->questions[i]->dns_question_class;
const char *qname = req->questions[i]->name;
struct in_addr ans;
ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
if (qtype == EVDNS_TYPE_A &&
qclass == EVDNS_CLASS_INET &&
!evutil_ascii_strcasecmp(qname, "zz.example.com")) {
r = evdns_server_request_add_a_reply(req, qname,
1, &ans.s_addr, 12345);
if (r<0)
dns_ok = 0;
} else if (qtype == EVDNS_TYPE_AAAA &&
qclass == EVDNS_CLASS_INET &&
!evutil_ascii_strcasecmp(qname, "zz.example.com")) {
char addr6[17] = "abcdefghijklmnop";
r = evdns_server_request_add_aaaa_reply(req,
qname, 1, addr6, 123);
if (r<0)
dns_ok = 0;
} else if (qtype == EVDNS_TYPE_PTR &&
qclass == EVDNS_CLASS_INET &&
!evutil_ascii_strcasecmp(qname, TEST_ARPA)) {
r = evdns_server_request_add_ptr_reply(req, NULL,
qname, "ZZ.EXAMPLE.COM", 54321);
if (r<0)
dns_ok = 0;
} else if (qtype == EVDNS_TYPE_PTR &&
qclass == EVDNS_CLASS_INET &&
!evutil_ascii_strcasecmp(qname, TEST_IN6)){
r = evdns_server_request_add_ptr_reply(req, NULL,
qname,
"ZZ-INET6.EXAMPLE.COM", 54322);
if (r<0)
dns_ok = 0;
} else if (qtype == EVDNS_TYPE_A &&
qclass == EVDNS_CLASS_INET &&
!evutil_ascii_strcasecmp(qname, "drop.example.com")) {
if (evdns_server_request_drop(req)<0)
dns_ok = 0;
return;
} else {
printf("Unexpected question %d %d \"%s\" ",
qtype, qclass, qname);
dns_ok = 0;
}
}
r = evdns_server_request_respond(req, 0);
if (r<0) {
printf("Couldn't send reply. ");
dns_ok = 0;
}
}
