Init

1 files changed, 72 insertions, 0 deletions

diff --git a/dpi.c b/dpi.c
new file mode 100644
index 0000000..7b38800
--- /dev/null
+++ b/dpi.c
@@ -0,0 +1,72 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <err.h>
+#include "dpi.h"
+#include "io.h"
+
+static void check_auth() {
+	char buf[30];
+	int rc;
+	char key[4], local_key[4];
+	char keys[128];
+	char *home;
+	ssize_t sz;
+	rc = read_all(STDIN_FILENO, buf, 29);
+	if (rc < 0) err(1, "read auth");
+	buf[30] = '\0';
+	rc = sscanf(buf, "<cmd='auth' msg='%4x' '>", key);
+	if (rc < 0) err(1, "auth: %.*s", 29, buf);
+	if (rc < 1) errx(1, "auth: %.*s", 29, buf);
+	home = getenv("HOME");
+	if (!home) home = ".";
+	sz = read_file(keys, sizeof(keys), "%s/.dillo/dpid_comm_keys", home);
+	if (sz < 0) err(1, "read dillo comm keys");
+	rc = sscanf(keys, "%*d %4x' '>", local_key);
+	if (rc < 0) err(1, "comm key: %.*s", sz, keys);
+	if (rc < 1) errx(1, "comm key: %.*s", sz, keys);
+	if (memcmp(key, local_key, 4)) errx(1, "wrong dillo key");
+}
+
+static void get_url(char *url_buf, size_t url_len) {
+	char buf[21];
+	size_t len;
+	int rc;
+	int i;
+
+	rc = read_all(STDIN_FILENO, buf, sizeof(buf));
+	if (rc < 0) err(1, "read open_url");
+	if (strncmp(buf, "<cmd='open_url' url='", 21)) {
+		err(1, "bad open_url cmd: %.*s", sizeof(buf), buf);
+	}
+	len = url_len;
+	rc = read_some(STDIN_FILENO, url_buf, &len);
+	if (rc < 0) err(1, "read url");
+
+	for (i = 0; i < len-1; i++) {
+		if (url_buf[i] == '\'' && url_buf[i+1] == ' ') break;
+	}
+	if (i > len-3 || strncmp(url_buf + i, "' '>", 4)) {
+		err(1, "bad url end: %.*s", len, url_buf);
+	}
+	url_buf[i] = '\0';
+}
+
+void dpi_read_request(char *url_buf, size_t url_len) {
+	check_auth();
+	get_url(url_buf, url_len);
+}
+
+void dpi_send_status(const char *status) {
+	int rc = printf("<cmd='send_status_msg' msg='%s' '>", status);
+	if (rc < 0) err(1, "send_status_msg");
+}
+
+void dpi_send_header(const char *url, const char *content_type) {
+	int rc;
+	if (!url) url = "";
+	rc = printf("<cmd='start_send_page' url='%s' '>"
+	              "Content-Type: %s\n\n", url, content_type);
+	if (rc < 0) err(1, "start_send_page");
+}