Upcall API and some examples (2 clients and 4 servers)

README.md

@@ -5,5 +5,3 @@ This is a userland SCTP stack supporting FreeBSD, Linux, Mac OS X and Windows.
 
 See [manual](Manual.md) for more information.
 
-The status of continuous integration testing is available from [grid](http://212.201.121.110:18010/grid) and [waterfall](http://212.201.121.110:18010/waterfall).
-If you are only interested in a single branch, just append `?branch=BRANCHNAME` to the URL, for example [waterfall](http://212.201.121.110:18010/waterfall?branch=master).

programs/CMakeLists.txt

@@ -83,6 +83,12 @@ set(check_programs
 	test_libmgmt.c
 	test_timer.c
 	tsctp.c
+	http_client_upcall.c
+        client_upcall.c
+        discard_server_upcall.c
+        echo_server_upcall.c
+        chargen_server_upcall.c
+        daytime_server_upcall.c
 )
 
 foreach (source_file ${check_programs})

programs/chargen_server_upcall.c

@@ -0,0 +1,239 @@
+/*
+ * Copyright (C) 2012-2013 Michael Tuexen
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.	IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Usage: daytime_server [local_encaps_port] [remote_encaps_port]
+ */
+
+#ifdef _WIN32
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#ifndef _WIN32
+#include <unistd.h>
+#include <time.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#endif
+#include <usrsctp.h>
+
+#define BUFFERSIZE 10240
+#define PORT 19
+
+char buffer[95];
+int done = 0;
+int send_done = 0;
+
+static void
+initBuffer() {
+	int i, j;
+	for (i = 32, j = 0; i < 126; i++, j++) {
+		buffer[j] = i;
+	}
+}
+
+unsigned int signCounter = 0;
+static void
+handle_upcall(struct socket *sock, void *data, int flgs);
+
+static void
+handle_accept(struct socket *sock, void *data, int flags)
+{
+	struct socket *conn_sock;
+
+	if (((conn_sock = usrsctp_accept(sock, NULL, NULL)) == NULL)
+	    && (errno != EINPROGRESS)) {
+		perror("usrsctp_accept");
+		return;
+	}
+	done = 0;
+	printf("connection accepted from socket %p\n", (void *)conn_sock);
+	usrsctp_set_upcall(conn_sock, handle_upcall, NULL);
+}
+
+static void
+handle_upcall(struct socket *sock, void *data, int flgs)
+{
+	int events = usrsctp_get_events(sock);
+
+	if (events & SCTP_EVENT_READ && !send_done) {
+		char *buf;
+		struct sctp_recvv_rn rn;
+		ssize_t n;
+		struct sockaddr_storage addr;
+		buf = malloc(BUFFERSIZE);
+		int flags = 0;
+		socklen_t len = (socklen_t)sizeof(struct sockaddr_storage);
+		unsigned int infotype = 0;
+		socklen_t infolen = sizeof(struct sctp_recvv_rn);
+		memset(&rn, 0, sizeof(struct sctp_recvv_rn));
+
+		n = usrsctp_recvv(sock, buf, BUFFERSIZE, (struct sockaddr *) &addr, &len, (void *)&rn,
+				 &infolen, &infotype, &flags);
+		if (n < 0) {
+			perror("usrsctp_recvv");
+			done = 1;
+			usrsctp_close(sock);
+			printf("client socket %p closed\n", (void *)sock);
+			sock = NULL;
+			return;
+		}
+		if (n == 0) {
+			done = 1;
+			usrsctp_close(sock);
+			printf("client socket %p closed\n", (void *)sock);
+			sock = NULL;
+			return;
+		}
+		if (n > 0) {
+			if (flags & MSG_NOTIFICATION) {
+				printf("Notification of length %d received.\n", (int)n);
+			} else {
+				printf("data of size %zd received\n", n);
+			}
+		}
+		free(buf);
+	}
+
+	if ((events & SCTP_EVENT_WRITE) && !done) {
+		struct sctp_sndinfo snd_info;
+		snd_info.snd_sid = 0;
+		snd_info.snd_flags = 0;
+		snd_info.snd_ppid = 0;
+		snd_info.snd_context = 0;
+		snd_info.snd_assoc_id = 0;
+		if (usrsctp_sendv(sock, buffer, strlen(buffer), NULL, 0, &snd_info, (socklen_t)sizeof(struct sctp_sndinfo), SCTP_SENDV_SNDINFO, 0) < 0) {
+			if (errno != EAGAIN) {
+				send_done = 1;
+				usrsctp_close(sock);
+				printf("client socket %p closed\n", (void *)sock);
+				return;
+			}
+		}
+	}
+
+	return;
+}
+
+void
+debug_printf(const char *format, ...)
+{
+	va_list ap;
+
+	va_start(ap, format);
+	vprintf(format, ap);
+	va_end(ap);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct socket *listening_socket;
+	struct sockaddr_in6 addr;
+	struct sctp_udpencaps encaps;
+	struct sctp_assoc_value av;
+	const int on = 1;
+
+	if (argc > 1) {
+		usrsctp_init(atoi(argv[1]), NULL, debug_printf);
+	} else {
+		usrsctp_init(9899, NULL, debug_printf);
+	}
+#ifdef SCTP_DEBUG
+	usrsctp_sysctl_set_sctp_debug_on(SCTP_DEBUG_NONE);
+#endif
+	usrsctp_sysctl_set_sctp_blackhole(2);
+
+	if ((listening_socket = usrsctp_socket(AF_INET6, SOCK_STREAM, IPPROTO_SCTP, NULL, NULL, 0, NULL)) == NULL) {
+		perror("usrsctp_socket");
+	}
+	usrsctp_set_non_blocking(listening_socket, 1);
+	if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_I_WANT_MAPPED_V4_ADDR, (const void*)&on, (socklen_t)sizeof(int)) < 0) {
+		perror("usrsctp_setsockopt SCTP_I_WANT_MAPPED_V4_ADDR");
+	}
+	memset(&av, 0, sizeof(struct sctp_assoc_value));
+	av.assoc_id = SCTP_ALL_ASSOC;
+	av.assoc_value = 47;
+
+	if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_CONTEXT, (const void*)&av, (socklen_t)sizeof(struct sctp_assoc_value)) < 0) {
+		perror("usrsctp_setsockopt SCTP_CONTEXT");
+	}
+	if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_RECVRCVINFO, &on, sizeof(int)) < 0) {
+		perror("usrsctp_setsockopt SCTP_RECVRCVINFO");
+	}
+	if (argc > 2) {
+		memset(&encaps, 0, sizeof(struct sctp_udpencaps));
+		encaps.sue_address.ss_family = AF_INET6;
+		encaps.sue_port = htons(atoi(argv[2]));
+		if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_REMOTE_UDP_ENCAPS_PORT, (const void*)&encaps, (socklen_t)sizeof(struct sctp_udpencaps)) < 0) {
+			perror("usrsctp_setsockopt SCTP_REMOTE_UDP_ENCAPS_PORT");
+		}
+	}
+
+	initBuffer();
+
+	memset((void *)&addr, 0, sizeof(struct sockaddr_in6));
+#ifdef HAVE_SIN6_LEN
+	addr.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+	addr.sin6_family = AF_INET6;
+	addr.sin6_port = htons(PORT);
+	addr.sin6_addr = in6addr_any;
+	if (usrsctp_bind(listening_socket, (struct sockaddr *)&addr, sizeof(struct sockaddr_in6)) < 0) {
+		perror("usrsctp_bind");
+	}
+	if (usrsctp_listen(listening_socket, 1) < 0) {
+		perror("usrsctp_listen");
+	}
+	usrsctp_set_upcall(listening_socket, handle_accept, NULL);
+
+	while (1) {
+#ifdef _WIN32
+		Sleep(1*1000);
+#else
+		sleep(1);
+#endif
+	}
+	usrsctp_close(listening_socket);
+	while (usrsctp_finish() != 0) {
+#ifdef _WIN32
+		Sleep(1000);
+#else
+		sleep(1);
+#endif
+	}
+	return (0);
+}