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persistent keepalive: add userspace support 

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2016-07-08 02:30:03 +02:00
parent 2a9625acf6
commit fc743caf3b
4 changed files with 70 additions and 11 deletions
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30
src/config.c
View File

@ -182,6 +182,27 @@ static inline bool parse_endpoint(struct sockaddr_storage *endpoint, const char
return true;
}
static inline bool parse_persistent_keepalive(__u16 *interval, const char *value)
{
unsigned long ret;
char *end;
if (!strcasecmp(value, "off")) {
*interval = 0;
return true;
}
ret = strtoul(value, &end, 10);
if (!*value || *value == '-' || *end || (ret && (ret < 10 || ret > 3600))) {
fprintf(stderr, "The persistent keepalive interval must be 0/off or 10-3600. Found: `%s`\n", value);
return false;
}
*interval = (__u16)ret;
return true;
}
static inline bool parse_ipmasks(struct inflatable_device *buf, size_t peer_offset, const char *value)
{
struct wgpeer *peer;
@ -263,6 +284,7 @@ static bool process_line(struct config_ctx *ctx, const char *line)
ctx->is_peer_section = true;
ctx->is_device_section = false;
peer_from_offset(ctx->buf.dev, ctx->peer_offset)->replace_ipmasks = true;
peer_from_offset(ctx->buf.dev, ctx->peer_offset)->persistent_keepalive_interval = (__u16)-1;
return true;
}
@ -288,6 +310,8 @@ static bool process_line(struct config_ctx *ctx, const char *line)
ret = parse_key(peer_from_offset(ctx->buf.dev, ctx->peer_offset)->public_key, value);
else if (key_match("AllowedIPs"))
ret = parse_ipmasks(&ctx->buf, ctx->peer_offset, value);
else if (key_match("PersistentKeepalive"))
ret = parse_persistent_keepalive(&peer_from_offset(ctx->buf.dev, ctx->peer_offset)->persistent_keepalive_interval, value);
else
goto error;
} else
@ -476,6 +500,7 @@ bool config_read_cmd(struct wgdevice **device, char *argv[], int argc)
perror("use_space");
goto error;
}
peer_from_offset(buf.dev, peer_offset)->persistent_keepalive_interval = (__u16)-1;
++buf.dev->num_peers;
if (!parse_key(peer_from_offset(buf.dev, peer_offset)->public_key, argv[1]))
goto error;
@ -501,6 +526,11 @@ bool config_read_cmd(struct wgdevice **device, char *argv[], int argc)
free(line);
argv += 2;
argc -= 2;
} else if (!strcmp(argv[0], "persistent-keepalive") && argc >= 2 && buf.dev->num_peers) {
if (!parse_persistent_keepalive(&peer_from_offset(buf.dev, peer_offset)->persistent_keepalive_interval, argv[1]))
goto error;
argv += 2;
argc -= 2;
} else {
fprintf(stderr, "Invalid argument: %s\n", argv[0]);
goto error;

2
src/set.c
View File

@ -13,7 +13,7 @@ int set_main(int argc, char *argv[])
int ret = 1;
if (argc < 3) {
fprintf(stderr, "Usage: %s %s <interface> [listen-port <port>] [private-key <file path>] [peer <base64 public key> [remove] [endpoint <ip>:<port>] [allowed-ips <ip1>/<cidr1>[,<ip2>/<cidr2>]...] ]...\n", PROG_NAME, argv[0]);
fprintf(stderr, "Usage: %s %s <interface> [listen-port <port>] [private-key <file path>] [peer <base64 public key> [remove] [endpoint <ip>:<port>] [persistent-keepalive <interval seconds>] [allowed-ips <ip1>/<cidr1>[,<ip2>/<cidr2>]...] ]...\n", PROG_NAME, argv[0]);
return 1;
}

46
src/show.c
View File

@ -121,13 +121,11 @@ static char *endpoint(const struct sockaddr_storage *addr)
return buf;
}
static char *ago(const struct timeval *t)
static size_t pretty_time(char *buf, const size_t len, unsigned long long left)
{
static char buf[1024];
unsigned long long left, years, days, hours, minutes, seconds;
size_t offset = 0;
unsigned long long years, days, hours, minutes, seconds;
left = time(NULL) - t->tv_sec;
years = left / (365 * 24 * 60 * 60);
left = left % (365 * 24 * 60 * 60);
days = left / (24 * 60 * 60);
@ -138,15 +136,25 @@ static char *ago(const struct timeval *t)
seconds = left % 60;
if (years)
offset += snprintf(buf + offset, sizeof(buf) - offset, "%s%llu " TERMINAL_FG_CYAN "year%s" TERMINAL_RESET, offset ? ", " : "", years, years == 1 ? "" : "s");
offset += snprintf(buf + offset, len - offset, "%s%llu " TERMINAL_FG_CYAN "year%s" TERMINAL_RESET, offset ? ", " : "", years, years == 1 ? "" : "s");
if (days)
offset += snprintf(buf + offset, sizeof(buf) - offset, "%s%llu " TERMINAL_FG_CYAN "day%s" TERMINAL_RESET, offset ? ", " : "", days, days == 1 ? "" : "s");
offset += snprintf(buf + offset, len - offset, "%s%llu " TERMINAL_FG_CYAN "day%s" TERMINAL_RESET, offset ? ", " : "", days, days == 1 ? "" : "s");
if (hours)
offset += snprintf(buf + offset, sizeof(buf) - offset, "%s%llu " TERMINAL_FG_CYAN "hour%s" TERMINAL_RESET, offset ? ", " : "", hours, hours == 1 ? "" : "s");
offset += snprintf(buf + offset, len - offset, "%s%llu " TERMINAL_FG_CYAN "hour%s" TERMINAL_RESET, offset ? ", " : "", hours, hours == 1 ? "" : "s");
if (minutes)
offset += snprintf(buf + offset, sizeof(buf) - offset, "%s%llu " TERMINAL_FG_CYAN "minute%s" TERMINAL_RESET, offset ? ", " : "", minutes, minutes == 1 ? "" : "s");
offset += snprintf(buf + offset, len - offset, "%s%llu " TERMINAL_FG_CYAN "minute%s" TERMINAL_RESET, offset ? ", " : "", minutes, minutes == 1 ? "" : "s");
if (seconds)
offset += snprintf(buf + offset, sizeof(buf) - offset, "%s%llu " TERMINAL_FG_CYAN "second%s" TERMINAL_RESET, offset ? ", " : "", seconds, seconds == 1 ? "" : "s");
offset += snprintf(buf + offset, len - offset, "%s%llu " TERMINAL_FG_CYAN "second%s" TERMINAL_RESET, offset ? ", " : "", seconds, seconds == 1 ? "" : "s");
return offset;
}
static char *ago(const struct timeval *t)
{
static char buf[1024];
size_t offset;
offset = pretty_time(buf, sizeof(buf), time(NULL) - t->tv_sec);
if (offset)
snprintf(buf + offset, sizeof(buf) - offset, " ago");
else
@ -155,6 +163,13 @@ static char *ago(const struct timeval *t)
return buf;
}
static char *every(uint16_t seconds)
{
static char buf[1024] = "every ";
pretty_time(buf + strlen("every "), sizeof(buf) - strlen("every "), seconds);
return buf;
}
static char *bytes(uint64_t b)
{
static char buf[1024];
@ -176,7 +191,7 @@ static char *bytes(uint64_t b)
static const char *COMMAND_NAME = NULL;
static void show_usage(void)
{
fprintf(stderr, "Usage: %s %s { <interface> | all | interfaces } [public-key | private-key | preshared-key | listen-port | peers | endpoints | allowed-ips | latest-handshake | bandwidth]\n", PROG_NAME, COMMAND_NAME);
fprintf(stderr, "Usage: %s %s { <interface> | all | interfaces } [public-key | private-key | preshared-key | listen-port | peers | endpoints | allowed-ips | latest-handshake | bandwidth | persistent-keepalive]\n", PROG_NAME, COMMAND_NAME);
}
static void pretty_print(struct wgdevice *device)
@ -216,6 +231,8 @@ static void pretty_print(struct wgdevice *device)
terminal_printf("%s received, ", bytes(peer->rx_bytes));
terminal_printf("%s sent\n", bytes(peer->tx_bytes));
}
if (peer->persistent_keepalive_interval)
terminal_printf(" " TERMINAL_BOLD "persistent keepalive" TERMINAL_RESET ": %s\n", every(peer->persistent_keepalive_interval));
if (i + 1 < device->num_peers)
terminal_printf("\n");
}
@ -275,6 +292,15 @@ static bool ugly_print(struct wgdevice *device, const char *param, bool with_int
printf("%s\t", device->interface);
printf("%s\t%" PRIu64 "\t%" PRIu64 "\n", key(peer->public_key), (uint64_t)peer->rx_bytes, (uint64_t)peer->tx_bytes);
}
} else if (!strcmp(param, "persistent-keepalive")) {
for_each_wgpeer(device, peer, i) {
if (with_interface)
printf("%s\t", device->interface);
if (peer->persistent_keepalive_interval)
printf("%s\t%u\n", key(peer->public_key), peer->persistent_keepalive_interval);
else
printf("%s\toff\n", key(peer->public_key));
}
} else if (!strcmp(param, "peers")) {
for_each_wgpeer(device, peer, i) {
if (with_interface)

3
src/showconf.c
View File

@ -91,6 +91,9 @@ int showconf_main(int argc, char *argv[])
}
}
if (peer->persistent_keepalive_interval)
printf("PersistentKeepalive = %u\n", peer->persistent_keepalive_interval);
if (i + 1 < device->num_peers)
printf("\n");
}