X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=ctdlsalearn%2Fsrc%2Fsockets.c;fp=ctdlsalearn%2Fsrc%2Fsockets.c;h=05465467ac759aca052ef41efcbd5d967d6f29c3;hb=0eb2bdf5f6ed3f0d25da0226fbb92ad91003281d;hp=0000000000000000000000000000000000000000;hpb=fab6a9389e77f1546dfe620d96617ea164f8cdd6;p=citadel.git

diff --git a/ctdlsalearn/src/sockets.c b/ctdlsalearn/src/sockets.c
new file mode 100644
index 000000000..05465467a
--- /dev/null
+++ b/ctdlsalearn/src/sockets.c
@@ -0,0 +1,182 @@
+/*
+ *
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <string.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdarg.h>
+#include "ctdlsalearn.h"
+
+#ifndef INADDR_NONE
+#define INADDR_NONE 0xffffffff
+#endif
+
+int uds_connectsock(char *sockpath)
+{
+	struct sockaddr_un addr;
+	int s;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sun_family = AF_UNIX;
+	strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
+
+	s = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (s < 0) {
+		fprintf(stderr, "Can't create socket[%s]: %s\n", sockpath, strerror(errno));
+		return(-1);
+	}
+
+	if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		fprintf(stderr, "Can't connect [%s]: %s\n", sockpath, strerror(errno));
+		close(s);
+		return(-1);
+	}
+
+	return s;
+}
+
+
+/*
+ * sock_read_to() - input binary data from socket, with a settable timeout.
+ * Returns the number of bytes read, or -1 for error.
+ * If keep_reading_until_full is nonzero, we keep reading until we get the number of requested bytes
+ */
+int sock_read_to(int sock, char *buf, int bytes, int timeout, int keep_reading_until_full)
+{
+	int len,rlen;
+	fd_set rfds;
+	struct timeval tv;
+	int retval;
+
+	len = 0;
+	while (len<bytes) {
+		FD_ZERO(&rfds);
+		FD_SET(sock, &rfds);
+		tv.tv_sec = timeout;
+		tv.tv_usec = 0;
+
+		retval = select(sock+1, &rfds, NULL, NULL, &tv);
+
+		if (FD_ISSET(sock, &rfds) == 0) {	/* timed out */
+			fprintf(stderr, "sock_read() timed out.\n");
+			return(-1);
+		}
+
+		rlen = read(sock, &buf[len], bytes-len);
+		if (rlen<1) {
+			fprintf(stderr, "sock_read() failed: %s\n",
+				strerror(errno));
+			return(-1);
+		}
+		len = len + rlen;
+		if (!keep_reading_until_full) return(len);
+	}
+	return(bytes);
+}
+
+
+/*
+ * sock_read() - input binary data from socket.
+ * Returns the number of bytes read, or -1 for error.
+ */
+int sock_read(int sock, char *buf, int bytes, int keep_reading_until_full)
+{
+	return sock_read_to(sock, buf, bytes, 30, keep_reading_until_full);
+}
+
+
+/*
+ * sock_write() - send binary to server.
+ * Returns the number of bytes written, or -1 for error.
+ */
+int sock_write(int sock, char *buf, int nbytes)
+{
+	int bytes_written = 0;
+	int retval;
+	while (bytes_written < nbytes) {
+		retval = write(sock, &buf[bytes_written],
+			       nbytes - bytes_written);
+		if (retval < 1) {
+			return (-1);
+		}
+		bytes_written = bytes_written + retval;
+	}
+	return (bytes_written);
+}
+
+
+
+/*
+ * Input string from socket - implemented in terms of sock_read()
+ * 
+ */
+int sock_getln(int sock, char *buf, int bufsize)
+{
+	int i;
+
+	/* Read one character at a time.
+	 */
+	for (i = 0;; i++) {
+		if (sock_read(sock, &buf[i], 1, 1) < 0) return(-1);
+		if (buf[i] == '\n' || i == (bufsize-1))
+			break;
+	}
+
+	/* If we got a long line, discard characters until the newline.
+	 */
+	if (i == (bufsize-1))
+		while (buf[i] != '\n')
+			if (sock_read(sock, &buf[i], 1, 1) < 0) return(-1);
+
+	/* Strip any trailing CR and LF characters.
+	 */
+	buf[i] = 0;
+	while ( (i > 0)
+		&& ( (buf[i - 1]==13)
+		     || ( buf[i - 1]==10)) ) {
+		i--;
+		buf[i] = 0;
+	}
+	return(i);
+}
+
+
+
+/*
+ * sock_puts() - send line to server - implemented in terms of serv_write()
+ * Returns the number of bytes written, or -1 for error.
+ */
+int sock_puts(int sock, char *buf)
+{
+	int i, j;
+
+	i = sock_write(sock, buf, strlen(buf));
+	if (i<0) return(i);
+	j = sock_write(sock, "\n", 1);
+	if (j<0) return(j);
+	return(i+j);
+}
+
+
+void sock_printf(int sock, const char *format,...)
+{
+	va_list arg_ptr;
+	char buf[4096];
+	size_t len;
+
+	va_start(arg_ptr, format);
+	vsnprintf(buf, sizeof buf, format, arg_ptr);
+	va_end(arg_ptr);
+
+	sock_write(sock, buf, strlen(buf));
+}