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Ignore bootstrap nodes that use a domain instead of IP address

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Domains cause toxcore to do blocking DNS requests which creates noticable lag
and might (??) leak IP addresses when using a proxy
This commit is contained in:
Jfreegman 2016-09-21 00:28:16 -04:00
parent 151f5f0c51
commit 221d761ff4
No known key found for this signature in database
GPG Key ID: 3627F3144076AE63
3 changed files with 17 additions and 1 deletions
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6
src/bootstrap.c
View File

@ -77,7 +77,6 @@ static struct DHT_Nodes {
char keys[MAXNODES][TOX_PUBLIC_KEY_SIZE]; char keys[MAXNODES][TOX_PUBLIC_KEY_SIZE];
} Nodes; } Nodes;
/* Return true if nodeslist pointed to by fp needs to be updated. /* Return true if nodeslist pointed to by fp needs to be updated.
* This will be the case if the file is empty, has an invalid format, * This will be the case if the file is empty, has an invalid format,
* or if the file is older than the given timeout. * or if the file is older than the given timeout.
@ -297,6 +296,11 @@ int load_DHT_nodeslist(void)
memcpy(ipv4_string, ip_start, ip_len); memcpy(ipv4_string, ip_start, ip_len);
ipv4_string[ip_len] = 0; ipv4_string[ip_len] = 0;
/* ignore domains because we don't want toxcore doing DNS requests during bootstrap. */
if (!is_ip4_address(ipv4_string)) {
continue;
}
/* Extract port */ /* Extract port */
const char *port_start = strstr(ip_start, PORT_JSON_VALUE); const char *port_start = strstr(ip_start, PORT_JSON_VALUE);

9
src/misc_tools.c
View File

@ -26,7 +26,9 @@
#include <time.h> #include <time.h>
#include <limits.h> #include <limits.h>
#include <dirent.h> #include <dirent.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <arpa/inet.h>
#include "toxic.h" #include "toxic.h"
#include "windows.h" #include "windows.h"
@ -478,3 +480,10 @@ void set_window_title(ToxWindow *self, const char *title, int len)
snprintf(self->name, sizeof(self->name), "%s", cpy); snprintf(self->name, sizeof(self->name), "%s", cpy);
} }
/* Return true if address appears to be a valid ipv4 address. */
bool is_ip4_address(const char *address)
{
struct sockaddr_in s_addr;
return inet_pton(AF_INET, address, &(s_addr.sin_addr)) != 0;
}

3
src/misc_tools.h
View File

@ -161,4 +161,7 @@ int check_file_signature(const char *signature, size_t size, FILE *fp);
/* sets window title in tab bar. */ /* sets window title in tab bar. */
void set_window_title(ToxWindow *self, const char *title, int len); void set_window_title(ToxWindow *self, const char *title, int len);
/* Return true if address appears to be a valid ipv4 address. */
bool is_ip4_address(const char *address);
#endif /* #define MISC_TOOLS_H */ #endif /* #define MISC_TOOLS_H */