Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 229 insertions, 0 deletions

diff --git a/kio/misc/kpac/kpac_dhcp_helper.c b/kio/misc/kpac/kpac_dhcp_helper.c
new file mode 100644
index 000000000..906e89dfa
--- /dev/null
+++ b/kio/misc/kpac/kpac_dhcp_helper.c
@@ -0,0 +1,229 @@
+/* This file is part of the KDE Libraries
+   Copyright (c) 2001 Malte Starostik <malte@kde.org>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License version 2 as published by the Free Software Foundation.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+
+#include <config.h>
+#include <sys/types.h>
+#include <grp.h>
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <time.h>
+#include <netdb.h>
+#include <netinet/in.h>
+
+#include "dhcp.h"
+
+#ifndef INADDR_NONE /* some OSes don't define this */
+#define INADDR_NONE -1
+#endif
+
+int set_gid(gid_t);
+int set_uid(uid_t);
+int get_port(const char *);
+int init_socket(void);
+uint32_t send_request(int);
+void get_reply(int, uint32_t);
+
+int set_gid(gid_t gid)
+{
+#ifdef HAVE_SHORTSETGROUPS
+	short x[2];
+	x[0] = gid;
+	x[1] = 73; /* catch errors */
+	if (setgroups(1, x) == -1)
+		return -1;
+#else
+	if (setgroups(1, &gid) == -1)
+		return -1;
+#endif
+	return setgid(gid); /* _should_ be redundant, but on some systems it isn't */
+}
+
+int set_uid(uid_t uid)
+{
+	return setuid(uid);
+}
+
+/* All functions below do an exit(1) on the slightest error */
+
+/* Returns the UDP port number for the given service name */
+int get_port(const char *service)
+{
+	struct servent *serv = getservbyname(service, "udp");
+	if (serv == NULL)
+		exit(1);
+
+	return serv->s_port;
+}
+
+/* Opens the UDP socket, binds to the bootpc port and drops root privileges */
+int init_socket()
+{
+	struct sockaddr_in addr;
+	struct protoent *proto;
+	int sock;
+	int bcast = 1;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = INADDR_ANY;
+	addr.sin_port = get_port("bootpc");
+
+	if ((proto = getprotobyname("udp")) == NULL ||
+		(sock = socket(AF_INET, SOCK_DGRAM, proto->p_proto)) == -1)
+		exit(1);
+
+	if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &bcast, sizeof(bcast)) == -1 ||
+		setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &bcast, sizeof(bcast)) == -1 ||
+		bind(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1)
+		exit(1);
+
+	if (set_gid(getgid()) != 0 || /* we don't need it anymore */
+		set_uid(getuid()) != 0)
+		exit(1);
+	return sock;
+}
+
+/* Fills the DHCPINFORM request packet, returns the transaction id */
+uint32_t send_request(int sock)
+{
+	char hostname[256];
+	struct hostent *hent;
+	struct sockaddr_in addr;
+	struct dhcp_msg request;
+	uint8_t *offs = request.options;
+
+	hostname[0] = '\0';
+	hostname[255] = '\0';
+	if (gethostname(hostname, 255) == -1 ||
+		strlen(hostname) == 0 ||
+		(hent = gethostbyname(hostname)) == NULL)
+		exit(1);
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = INADDR_NONE;
+	addr.sin_port = get_port("bootps");
+
+	memset(&request, 0, sizeof(request));
+	request.op = DHCP_BOOTREQUEST;
+	srand(time(NULL));
+	request.xid = rand();
+	request.ciaddr = *(uint32_t*)*hent->h_addr_list;
+
+	*offs++ = DHCP_MAGIC1;
+	*offs++ = DHCP_MAGIC2;
+	*offs++ = DHCP_MAGIC3;
+	*offs++ = DHCP_MAGIC4;
+
+	*offs++ = DHCP_OPT_MSGTYPE;
+	*offs++ = 1; /* length */
+	*offs++ = DHCP_INFORM;
+
+	*offs++ = DHCP_OPT_PARAMREQ;
+	*offs++ = 1; /* length */
+	*offs++ = DHCP_OPT_WPAD;
+
+	*offs++ = DHCP_OPT_END;
+
+	if (sendto(sock, &request, sizeof(request), 0,
+		(struct sockaddr *)&addr, sizeof(addr)) != sizeof(request))
+		exit(1);
+
+	return request.xid;
+}
+
+/* Reads the reply from the socket, checks it and outputs the URL to STDOUT */
+void get_reply(int sock, uint32_t xid)
+{
+	struct dhcp_msg reply;
+	int len;
+	char wpad[DHCP_OPT_LEN + 1];
+	uint8_t wpad_len;
+	uint8_t *offs = reply.options;
+	uint8_t *end;
+
+	if ((len = recvfrom(sock, &reply, sizeof(reply), 0, NULL, NULL)) <= 0)
+		exit(1);
+
+	end = (uint8_t *)&reply + len;
+	if (end < offs + 4 ||
+		end > &reply.options[DHCP_OPT_LEN] ||
+		reply.op != DHCP_BOOTREPLY ||
+		reply.xid != xid ||
+		*offs++ != DHCP_MAGIC1 ||
+		*offs++ != DHCP_MAGIC2 ||
+		*offs++ != DHCP_MAGIC3 ||
+		*offs++ != DHCP_MAGIC4)
+		exit(1);
+
+	for ( ; offs < end - 1; offs += *offs+1)
+	{
+		switch (*offs++)
+		{
+			case DHCP_OPT_END:
+				exit(1);
+			case DHCP_OPT_MSGTYPE:
+				if (*offs != 1 || (offs >= end - 1) || *(offs + 1) != DHCP_ACK)
+					exit(1);
+				break;
+			case DHCP_OPT_WPAD:
+				memset(wpad, 0, sizeof(wpad));
+				wpad_len = *offs++;
+				if (offs >= end)
+					exit(1);
+				if (wpad_len > end - offs)
+					wpad_len = end - offs;
+				strncpy(wpad, (char *)offs, wpad_len);
+				wpad[wpad_len] = 0;
+				printf("%s\n", wpad);
+				close(sock);
+				exit(0);
+		}
+	}
+	exit(1);
+}
+
+int main()
+{
+	fd_set rfds;
+	struct timeval tv;
+	int sock;
+	uint32_t xid;
+
+	sock = init_socket();
+	xid = send_request(sock);
+
+	FD_ZERO(&rfds);
+	FD_SET(sock, &rfds);
+	tv.tv_sec = 5;
+	tv.tv_usec = 0;
+	if (select(sock + 1, &rfds, NULL, NULL, &tv) == 1 && FD_ISSET(sock, &rfds))
+		get_reply(sock, xid);
+
+	close(sock);
+	exit(1);
+}
+
+/* vim: ts=4 sw=4 noet
+ */