X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/4e0597cd50268bc57fa118f1362360a2db2ec23a..0834bba08ed4f1e507320306dc682d7e62371af5:/util.c?ds=sidebyside

diff --git a/util.c b/util.c
index 6d6b903..e132be6 100644
--- a/util.c
+++ b/util.c
@@ -1,7 +1,5 @@
 /* Misc util functions */
 
-char const *cvs_id_util = "$Id: util.c,v 1.5 2004-11-05 04:55:27 bodea Exp $";
-
 #include <unistd.h>
 #include <errno.h>
 #include <sched.h>
@@ -16,69 +14,158 @@ char const *cvs_id_util = "$Id: util.c,v 1.5 2004-11-05 04:55:27 bodea Exp $";
 #include "bgp.h"
 #endif
 
-char *inet_toa(unsigned long addr)
+// format ipv4 addr as a dotted-quad; n chooses one of 4 static buffers
+// to use
+char *fmtaddr(in_addr_t addr, int n)
 {
-	struct in_addr in;
-	memcpy(&in, &addr, sizeof(unsigned long));
-	return inet_ntoa(in);
+    static char addrs[4][16];
+    struct in_addr in;
+
+    if (n < 0 || n >= 4)
+	return "";
+
+    in.s_addr = addr;
+    return strcpy(addrs[n], inet_ntoa(in));
 }
 
 void *shared_malloc(unsigned int size)
 {
-	void * p;
-	p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
+    void * p;
+    p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
 
-	if (p == MAP_FAILED)
-		p = NULL;
+    if (p == MAP_FAILED)
+	p = NULL;
 
-	return p;
+    return p;
 }
 
-extern int udpfd, tunfd, snoopfd, ifrfd, cluster_sockfd;
+extern int forked;
+extern int cluster_sockfd, tunfd, udpfd, controlfd, daefd, snoopfd, ifrfd, ifr6fd, rand_fd;
 extern int *radfds;
 
 pid_t fork_and_close()
 {
-	pid_t pid = fork();
-	int i;
+    pid_t pid = fork();
+    int i;
 
-	if (pid)
-		return pid;
+    if (pid)
+	return pid;
 
-	if (config->scheduler_fifo)
+    forked++;
+    if (config->scheduler_fifo)
+    {
+	struct sched_param params = {0};
+	params.sched_priority = 0;
+	if (sched_setscheduler(0, SCHED_OTHER, &params))
 	{
-		struct sched_param params = {0};
-		params.sched_priority = 0;
-		if (sched_setscheduler(0, SCHED_OTHER, &params))
-		{
-			LOG(0, 0, 0, 0, "Error setting scheduler to OTHER after fork: %s\n", strerror(errno));
-			LOG(0, 0, 0, 0, "This is probably really really bad.\n");
-		}
+	    LOG(0, 0, 0, "Error setting scheduler to OTHER after fork: %s\n", strerror(errno));
+	    LOG(0, 0, 0, "This is probably really really bad.\n");
 	}
+    }
+
+    signal(SIGPIPE, SIG_DFL);
+    signal(SIGCHLD, SIG_DFL);
+    signal(SIGHUP,  SIG_DFL);
+    signal(SIGUSR1, SIG_DFL);
+    signal(SIGQUIT, SIG_DFL);
+    signal(SIGKILL, SIG_DFL);
+    signal(SIGTERM, SIG_DFL);
+
+    // Close sockets
+    if (clifd != -1)          close(clifd);
+    if (cluster_sockfd != -1) close(cluster_sockfd);
+    if (tunfd != -1)          close(tunfd);
+    if (udpfd != -1)          close(udpfd);
+    if (controlfd != -1)      close(controlfd);
+    if (daefd != -1)          close(daefd);
+    if (snoopfd != -1)        close(snoopfd);
+    if (rand_fd != -1)        close(rand_fd);
+    if (epollfd != -1)        close(epollfd);
+
+    for (i = 0; radfds && i < RADIUS_FDS; i++)
+	close(radfds[i]);
 
-	signal(SIGPIPE, SIG_DFL);
-	signal(SIGCHLD, SIG_DFL);
-	signal(SIGHUP, SIG_DFL);
-	signal(SIGUSR1, SIG_DFL);
-	signal(SIGQUIT, SIG_DFL);
-	signal(SIGKILL, SIG_DFL);
-	signal(SIGALRM, SIG_DFL);
-	signal(SIGTERM, SIG_DFL);
-
-	// Close sockets
-	if (udpfd) close(udpfd); udpfd = 0;
-	if (tunfd) close(tunfd); tunfd = 0;
-	if (snoopfd) close(snoopfd); snoopfd = 0;
-	for (i = 0; i < config->num_radfds; i++)
-		if (radfds[i]) close(radfds[i]);
-	if (ifrfd) close(ifrfd); ifrfd = 0;
-	if (cluster_sockfd) close(cluster_sockfd); cluster_sockfd = 0;
-	if (clifd) close(clifd); clifd = 0;
 #ifdef BGP
-	for (i = 0; i < BGP_NUM_PEERS; i++)
-		if (bgp_peers[i].sock != -1)
-			close(bgp_peers[i].sock);
+    for (i = 0; i < BGP_NUM_PEERS; i++)
+	if (bgp_peers[i].sock != -1)
+	    close(bgp_peers[i].sock);
 #endif /* BGP */
 
-	return pid;
+    return pid;
+}
+
+ssize_t recvfromto(int s, void *buf, size_t len, int flags,
+    struct sockaddr *from, socklen_t *fromlen, struct in_addr *toaddr)
+{
+    ssize_t r;
+    struct msghdr msg;
+    struct cmsghdr *cmsg;
+    struct iovec vec;
+    char cbuf[128];
+
+    memset(&msg, 0, sizeof(msg));
+    msg.msg_name = from;
+    msg.msg_namelen = *fromlen;
+
+    vec.iov_base = buf;
+    vec.iov_len = len;
+    msg.msg_iov = &vec;
+    msg.msg_iovlen = 1;
+    msg.msg_flags = 0;
+
+    msg.msg_control = cbuf;
+    msg.msg_controllen = sizeof(cbuf);
+
+    if ((r = recvmsg(s, &msg, flags)) < 0)
+    	return r;
+
+    if (fromlen)
+	*fromlen = msg.msg_namelen;
+
+    memset(toaddr, 0, sizeof(*toaddr));
+    for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
+    {
+	if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_PKTINFO)
+	{
+	    struct in_pktinfo *i = (struct in_pktinfo *) CMSG_DATA(cmsg);
+	    memcpy(toaddr, &i->ipi_addr, sizeof(*toaddr));
+	    break;
+	}
+    }
+
+    return r;
+}
+
+ssize_t sendtofrom(int s, void const *buf, size_t len, int flags,
+    struct sockaddr const *to, socklen_t tolen, struct in_addr const *from)
+{
+    struct msghdr msg;
+    struct cmsghdr *cmsg;
+    struct iovec vec;
+    struct in_pktinfo pktinfo;
+    char cbuf[CMSG_SPACE(sizeof(pktinfo))];
+
+    memset(&msg, 0, sizeof(msg));
+    msg.msg_name = (struct sockaddr *) to;
+    msg.msg_namelen = tolen;
+
+    vec.iov_base = (void *) buf;
+    vec.iov_len = len;
+    msg.msg_iov = &vec;
+    msg.msg_iovlen = 1;
+    msg.msg_flags = 0;
+
+    msg.msg_control = cbuf;
+    msg.msg_controllen = sizeof(cbuf);
+
+    cmsg = CMSG_FIRSTHDR(&msg);
+    cmsg->cmsg_level = SOL_IP;
+    cmsg->cmsg_type = IP_PKTINFO;
+    cmsg->cmsg_len = CMSG_LEN(sizeof(pktinfo));
+
+    memset(&pktinfo, 0, sizeof(pktinfo));
+    memcpy(&pktinfo.ipi_spec_dst, from, sizeof(*from));
+    memcpy(CMSG_DATA(cmsg), &pktinfo, sizeof(pktinfo));
+
+    return sendmsg(s, &msg, flags);
 }