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>
35 lines
877 B
Makefile
35 lines
877 B
Makefile
PREFIX ?= /usr
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DESTDIR ?=
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BINDIR ?= $(PREFIX)/bin
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LIBDIR ?= $(PREFIX)/lib
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MANDIR ?= $(PREFIX)/share/man
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RUNSTATEDIR ?= /var/run
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CFLAGS += -std=gnu11
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CFLAGS += -pedantic -Wall -Wextra
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CFLAGS += -MMD
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CFLAGS += -DRUNSTATEDIR="\"$(RUNSTATEDIR)\""
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LDLIBS += -lresolv
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ifeq ($(shell uname -s),Linux)
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LIBMNL_CFLAGS := $(shell pkg-config --cflags libmnl 2>/dev/null)
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LIBMNL_LDLIBS := $(shell pkg-config --libs libmnl 2>/dev/null || echo -lmnl)
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CFLAGS += $(LIBMNL_CFLAGS)
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LDLIBS += $(LIBMNL_LDLIBS)
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endif
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wg: $(patsubst %.c,%.o,$(wildcard *.c))
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clean:
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rm -f wg *.o *.d
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install: wg
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install -v -d "$(DESTDIR)$(BINDIR)" && install -s -m 0755 -v wg "$(DESTDIR)$(BINDIR)/wg"
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install -v -d "$(DESTDIR)$(MANDIR)/man8" && install -m 0644 -v wg.8 "$(DESTDIR)$(MANDIR)/man8/wg.8"
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check: clean
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CFLAGS=-g scan-build --view --keep-going $(MAKE) wg
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.PHONY: clean install check
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-include *.d
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