merge new_loader_completion branch, including (at least):

  - restructured build tree and makefiles to eliminate recursion problems
  - support for embedded modules
  - support for static builds
  - simpler cross-compilation support
  - simpler module/loader interface (no exported symbols)



git-svn-id: http://svn.digium.com/svn/asterisk/trunk@40722 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 425 insertions, 0 deletions

diff --git a/main/acl.c b/main/acl.c
new file mode 100644
index 000000000..f3fd5097a
--- /dev/null
+++ b/main/acl.c
@@ -0,0 +1,425 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2006, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Various sorts of access control
+ *
+ * \author Mark Spencer <markster@digium.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <errno.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <sys/ioctl.h>
+
+#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__)
+#include <fcntl.h>
+#include <net/route.h>
+#endif
+
+#if defined(SOLARIS)
+#include <sys/sockio.h>
+#endif
+
+/* netinet/ip.h may not define the following (See RFCs 791 and 1349) */
+#if !defined(IPTOS_LOWCOST)
+#define       IPTOS_LOWCOST           0x02
+#endif
+
+#if !defined(IPTOS_MINCOST)
+#define       IPTOS_MINCOST           IPTOS_LOWCOST
+#endif
+
+#include "asterisk/acl.h"
+#include "asterisk/logger.h"
+#include "asterisk/channel.h"
+#include "asterisk/options.h"
+#include "asterisk/utils.h"
+#include "asterisk/lock.h"
+#include "asterisk/srv.h"
+
+struct ast_ha {
+	/* Host access rule */
+	struct in_addr netaddr;
+	struct in_addr netmask;
+	int sense;
+	struct ast_ha *next;
+};
+
+/* Default IP - if not otherwise set, don't breathe garbage */
+static struct in_addr __ourip = { 0x00000000 };
+
+struct my_ifreq {
+	char ifrn_name[IFNAMSIZ];	/* Interface name, e.g. "eth0", "ppp0", etc.  */
+	struct sockaddr_in ifru_addr;
+};
+
+/* Free HA structure */
+void ast_free_ha(struct ast_ha *ha)
+{
+	struct ast_ha *hal;
+	while (ha) {
+		hal = ha;
+		ha = ha->next;
+		free(hal);
+	}
+}
+
+/* Copy HA structure */
+static void ast_copy_ha(struct ast_ha *from, struct ast_ha *to)
+{
+	memcpy(&to->netaddr, &from->netaddr, sizeof(from->netaddr));
+	memcpy(&to->netmask, &from->netmask, sizeof(from->netmask));
+	to->sense = from->sense;
+}
+
+/* Create duplicate of ha structure */
+static struct ast_ha *ast_duplicate_ha(struct ast_ha *original)
+{
+	struct ast_ha *new_ha;
+
+	if ((new_ha = ast_malloc(sizeof(*new_ha)))) {
+		/* Copy from original to new object */
+		ast_copy_ha(original, new_ha);
+	}
+
+	return new_ha;
+}
+
+/* Create duplicate HA link list */
+/*  Used in chan_sip2 templates */
+struct ast_ha *ast_duplicate_ha_list(struct ast_ha *original)
+{
+	struct ast_ha *start = original;
+	struct ast_ha *ret = NULL;
+	struct ast_ha *link, *prev = NULL;
+
+	while (start) {
+		link = ast_duplicate_ha(start);  /* Create copy of this object */
+		if (prev)
+			prev->next = link;		/* Link previous to this object */
+
+		if (!ret)
+			ret = link;		/* Save starting point */
+
+		start = start->next;		/* Go to next object */
+		prev = link;			/* Save pointer to this object */
+	}
+	return ret;    			/* Return start of list */
+}
+
+struct ast_ha *ast_append_ha(char *sense, char *stuff, struct ast_ha *path)
+{
+	struct ast_ha *ha;
+	char *nm = "255.255.255.255";
+	char tmp[256];
+	struct ast_ha *prev = NULL;
+	struct ast_ha *ret;
+	int x, z;
+	unsigned int y;
+
+	ret = path;
+	while (path) {
+		prev = path;
+		path = path->next;
+	}
+	if ((ha = ast_malloc(sizeof(*ha)))) {
+		ast_copy_string(tmp, stuff, sizeof(tmp));
+		nm = strchr(tmp, '/');
+		if (!nm) {
+			nm = "255.255.255.255";
+		} else {
+			*nm = '\0';
+			nm++;
+		}
+		if (!strchr(nm, '.')) {
+			if ((sscanf(nm, "%d", &x) == 1) && (x >= 0) && (x <= 32)) {
+				y = 0;
+				for (z = 0; z < x; z++) {
+					y >>= 1;
+					y |= 0x80000000;
+				}
+				ha->netmask.s_addr = htonl(y);
+			}
+		} else if (!inet_aton(nm, &ha->netmask)) {
+			ast_log(LOG_WARNING, "%s is not a valid netmask\n", nm);
+			free(ha);
+			return path;
+		}
+		if (!inet_aton(tmp, &ha->netaddr)) {
+			ast_log(LOG_WARNING, "%s is not a valid IP\n", tmp);
+			free(ha);
+			return path;
+		}
+		ha->netaddr.s_addr &= ha->netmask.s_addr;
+		if (!strncasecmp(sense, "p", 1)) {
+			ha->sense = AST_SENSE_ALLOW;
+		} else {
+			ha->sense = AST_SENSE_DENY;
+		}
+		ha->next = NULL;
+		if (prev) {
+			prev->next = ha;
+		} else {
+			ret = ha;
+		}
+	}
+	ast_log(LOG_DEBUG, "%s/%s appended to acl for peer\n", stuff, nm);
+	return ret;
+}
+
+int ast_apply_ha(struct ast_ha *ha, struct sockaddr_in *sin)
+{
+	/* Start optimistic */
+	int res = AST_SENSE_ALLOW;
+	while (ha) {
+		char iabuf[INET_ADDRSTRLEN];
+		char iabuf2[INET_ADDRSTRLEN];
+		/* DEBUG */
+		ast_copy_string(iabuf, ast_inet_ntoa(sin->sin_addr), sizeof(iabuf));
+		ast_copy_string(iabuf2, ast_inet_ntoa(ha->netaddr), sizeof(iabuf2));
+		ast_log(LOG_DEBUG, "##### Testing %s with %s\n", iabuf, iabuf2);
+		/* For each rule, if this address and the netmask = the net address
+		   apply the current rule */
+		if ((sin->sin_addr.s_addr & ha->netmask.s_addr) == ha->netaddr.s_addr)
+			res = ha->sense;
+		ha = ha->next;
+	}
+	return res;
+}
+
+int ast_get_ip_or_srv(struct sockaddr_in *sin, const char *value, const char *service)
+{
+	struct hostent *hp;
+	struct ast_hostent ahp;
+	char srv[256];
+	char host[256];
+	int tportno = ntohs(sin->sin_port);
+	if (inet_aton(value, &sin->sin_addr))
+		return 0;
+	if (service) {
+		snprintf(srv, sizeof(srv), "%s.%s", service, value);
+		if (ast_get_srv(NULL, host, sizeof(host), &tportno, srv) > 0) {
+			sin->sin_port = htons(tportno);
+			value = host;
+		}
+	}
+	hp = ast_gethostbyname(value, &ahp);
+	if (hp) {
+		memcpy(&sin->sin_addr, hp->h_addr, sizeof(sin->sin_addr));
+	} else {
+		ast_log(LOG_WARNING, "Unable to lookup '%s'\n", value);
+		return -1;
+	}
+	return 0;
+}
+
+struct dscp_codepoint {
+	char *name;
+	unsigned int space;
+};
+
+/* IANA registered DSCP codepoints */
+
+static const struct dscp_codepoint dscp_pool1[] = {
+	{ "CS0", 0x00 },
+	{ "CS1", 0x08 },
+	{ "CS2", 0x10 },
+	{ "CS3", 0x18 },
+	{ "CS4", 0x20 },
+	{ "CS5", 0x28 },
+	{ "CS6", 0x30 },
+	{ "CS7", 0x38 },
+	{ "AF11", 0x0A },
+	{ "AF12", 0x0C },
+	{ "AF13", 0x0E },
+	{ "AF21", 0x12 },
+	{ "AF22", 0x14 },
+	{ "AF23", 0x16 },
+	{ "AF31", 0x1A },
+	{ "AF32", 0x1C },
+	{ "AF33", 0x1E },
+	{ "AF41", 0x22 },
+	{ "AF42", 0x24 },
+	{ "AF43", 0x26 },
+	{ "EF", 0x2E },
+};
+
+int ast_str2tos(const char *value, unsigned int *tos)
+{
+	int fval;
+	unsigned int x;
+
+	if (sscanf(value, "%i", &fval) == 1) {
+		*tos = fval & 0xFF;
+		return 0;
+	}
+
+	for (x = 0; x < sizeof(dscp_pool1) / sizeof(dscp_pool1[0]); x++) {
+		if (!strcasecmp(value, dscp_pool1[x].name)) {
+			*tos = dscp_pool1[x].space << 2;
+			return 0;
+		}
+	}
+
+	if (!strcasecmp(value, "lowdelay"))
+		*tos = IPTOS_LOWDELAY;
+	else if (!strcasecmp(value, "throughput"))
+		*tos = IPTOS_THROUGHPUT;
+	else if (!strcasecmp(value, "reliability"))
+		*tos = IPTOS_RELIABILITY;
+	else if (!strcasecmp(value, "mincost"))
+		*tos = IPTOS_MINCOST;
+	else if (!strcasecmp(value, "none"))
+		*tos = 0;
+	else
+		return -1;
+
+	ast_log(LOG_WARNING, "TOS value %s is deprecated. Please see doc/ip-tos.txt for more information.\n", value);
+
+	return 0;
+}
+
+const char *ast_tos2str(unsigned int tos)
+{
+	unsigned int x;
+
+	switch (tos) {
+	case 0:
+		return "none";
+	case IPTOS_LOWDELAY:
+		return "lowdelay";
+	case IPTOS_THROUGHPUT:
+		return "throughput";
+	case IPTOS_RELIABILITY:
+		return "reliability";
+	case IPTOS_MINCOST:
+		return "mincost";
+	default:
+		for (x = 0; x < sizeof(dscp_pool1) / sizeof(dscp_pool1[0]); x++) {
+			if (dscp_pool1[x].space == (tos >> 2))
+				return dscp_pool1[x].name;
+		}
+	}
+
+	return "unknown";
+}
+
+int ast_get_ip(struct sockaddr_in *sin, const char *value)
+{
+	return ast_get_ip_or_srv(sin, value, NULL);
+}
+
+/* iface is the interface (e.g. eth0); address is the return value */
+int ast_lookup_iface(char *iface, struct in_addr *address)
+{
+	int mysock, res = 0;
+	struct my_ifreq ifreq;
+
+	memset(&ifreq, 0, sizeof(ifreq));
+	ast_copy_string(ifreq.ifrn_name, iface, sizeof(ifreq.ifrn_name));
+
+	mysock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+	res = ioctl(mysock, SIOCGIFADDR, &ifreq);
+
+	close(mysock);
+	if (res < 0) {
+		ast_log(LOG_WARNING, "Unable to get IP of %s: %s\n", iface, strerror(errno));
+		memcpy((char *)address, (char *)&__ourip, sizeof(__ourip));
+		return -1;
+	} else {
+		memcpy((char *)address, (char *)&ifreq.ifru_addr.sin_addr, sizeof(ifreq.ifru_addr.sin_addr));
+		return 0;
+	}
+}
+
+int ast_ouraddrfor(struct in_addr *them, struct in_addr *us)
+{
+	int s;
+	struct sockaddr_in sin;
+	socklen_t slen;
+
+	s = socket(PF_INET, SOCK_DGRAM, 0);
+	if (s < 0) {
+		ast_log(LOG_WARNING, "Cannot create socket\n");
+		return -1;
+	}
+	sin.sin_family = AF_INET;
+	sin.sin_port = 5060;
+	sin.sin_addr = *them;
+	if (connect(s, (struct sockaddr *)&sin, sizeof(sin))) {
+		ast_log(LOG_WARNING, "Cannot connect\n");
+		close(s);
+		return -1;
+	}
+	slen = sizeof(sin);
+	if (getsockname(s, (struct sockaddr *)&sin, &slen)) {
+		ast_log(LOG_WARNING, "Cannot get socket name\n");
+		close(s);
+		return -1;
+	}
+	close(s);
+	*us = sin.sin_addr;
+	return 0;
+}
+
+int ast_find_ourip(struct in_addr *ourip, struct sockaddr_in bindaddr)
+{
+	char ourhost[MAXHOSTNAMELEN] = "";
+	struct ast_hostent ahp;
+	struct hostent *hp;
+	struct in_addr saddr;
+
+	/* just use the bind address if it is nonzero */
+	if (ntohl(bindaddr.sin_addr.s_addr)) {
+		memcpy(ourip, &bindaddr.sin_addr, sizeof(*ourip));
+		return 0;
+	}
+	/* try to use our hostname */
+	if (gethostname(ourhost, sizeof(ourhost) - 1)) {
+		ast_log(LOG_WARNING, "Unable to get hostname\n");
+	} else {
+		hp = ast_gethostbyname(ourhost, &ahp);
+		if (hp) {
+			memcpy(ourip, hp->h_addr, sizeof(*ourip));
+			return 0;
+		}
+	}
+	/* A.ROOT-SERVERS.NET. */
+	if (inet_aton("198.41.0.4", &saddr) && !ast_ouraddrfor(&saddr, ourip))
+		return 0;
+	return -1;
+}
+