b16641e30c
This is designed to work with a server that follows this:
struct sockaddr_un addr = {
.sun_family = AF_UNIX,
.sun_path = "/var/run/wireguard/wguserspace0.sock"
};
int fd, ret;
ssize_t len;
socklen_t socklen;
struct wgdevice *device;
fd = socket(AF_UNIX, SOCK_DGRAM, 0);
if (fd < 0)
exit(1);
if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
exit(1);
for (;;) {
/* First we look at how big the next message is, so we know how much to
* allocate. Note on BSD you can instead use ioctl(fd, FIONREAD, &len). */
len = recv(fd, NULL, 0, MSG_PEEK | MSG_TRUNC);
if (len < 0) {
handle_error();
continue;
}
/* Next we allocate a buffer for the received data. */
device = NULL;
if (len) {
device = malloc(len);
if (!device) {
handle_error();
continue;
}
}
/* Finally we receive the data, storing too the return address. */
socklen = sizeof(addr);
len = recvfrom(fd, device, len, 0, (struct sockaddr *)&addr, (socklen_t *)&socklen);
if (len < 0) {
handle_error();
free(device);
continue;
}
if (!len) { /* If len is zero, it's a "get" request, so we send our device back. */
device = get_current_wireguard_device(&len);
sendto(fd, device, len, 0, (struct sockaddr *)&addr, socklen);
} else { /* Otherwise, we just received a wgdevice, so we should "set" and send back the return status. */
ret = set_current_wireguard_device(device);
sendto(fd, &ret, sizeof(ret), 0, (struct sockaddr *)&addr, socklen);
free(device);
}
}
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "kernel.h"
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#include "subcommands.h"
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int setconf_main(int argc, char *argv[])
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{
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struct wgdevice *device = NULL;
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struct config_ctx ctx;
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FILE *config_input = NULL;
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char *config_buffer = NULL;
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size_t config_buffer_len = 0;
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int ret = 1;
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if (argc != 3) {
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fprintf(stderr, "Usage: %s %s <interface> <configuration filename>\n", PROG_NAME, argv[0]);
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return 1;
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}
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config_input = fopen(argv[2], "r");
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if (!config_input) {
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perror("fopen");
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return 1;
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}
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if (!config_read_init(&ctx, &device, !strcmp(argv[0], "addconf"))) {
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fclose(config_input);
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return 1;
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}
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while (getline(&config_buffer, &config_buffer_len, config_input) >= 0) {
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if (!config_read_line(&ctx, config_buffer)) {
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fprintf(stderr, "Configuration parsing error\n");
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goto cleanup;
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}
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}
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if (!config_read_finish(&ctx) || !device) {
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fprintf(stderr, "Invalid configuration\n");
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goto cleanup;
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}
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strncpy(device->interface, argv[1], IFNAMSIZ - 1);
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device->interface[IFNAMSIZ - 1] = 0;
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if (set_device(device) != 0) {
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perror("Unable to set device");
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goto cleanup;
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}
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ret = 0;
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cleanup:
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if (config_input)
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fclose(config_input);
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free(config_buffer);
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free(device);
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return ret;
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}
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