client.c
tig_freebsdfoundation.org (Tiger Gao)
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	tig_freebsdfoundation.org
	Apr 16 2020, 3:22 PM

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898 B

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client.c
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	#include <libcasper.h>
	#include <err.h>
	#include <capsicum_helpers.h>
	#include <cap_socket.h>
	#include <sys/socket.h>
	#include <string.h>

	int main() {
	cap_channel_t capcas, capsock;
	int sock;
	const char *paths[2] = {"any:127.0.0.1:-1", "tcp:www.google.com:80"};
	char *hello = "Hello from client hehe";
	char buffer[1024] = {0};

	capcas = cap_init();
	if (capcas == NULL)
	err(1, "Unable to contact Casper");
	if (cap_enter() < 0 && errno != ENOSYS)
	err(1, "Unable to enter capability mode");

	capsock = cap_service_open(capcas, "system.socket");
	if (capsock == NULL)
	err(1, "Unable to open system.socket service");
	cap_close(capcas);
	cap_socket_init(capsock, 2, paths);
	sock = cap_socket_connect(capsock, "tcp:127.0.0.1:8080");
	if (sock == -1)
	err(1, "Not allowed.");
	send(sock, hello, strlen(hello), 0);
	read(sock, buffer, 1024);
	printf("%s\n",buffer);
	return (0);
	}