/* Misc util functions */
-char const *cvs_id_util = "$Id: util.c,v 1.2 2004-06-28 02:43:13 fred_nerk Exp $";
-
-#include "l2tpns.h"
-
+#include <unistd.h>
+#include <errno.h>
+#include <sched.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
+#include <sys/mman.h>
+#include <linux/rtnetlink.h>
+
+#include "l2tpns.h"
+#ifdef BGP
+#include "bgp.h"
+#endif
+
+// format ipv4 addr as a dotted-quad; n chooses one of 4 static buffers
+// to use
+char *fmtaddr(in_addr_t addr, int n)
+{
+ 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));
+}
+
+char *fmtMacAddr(uint8_t *pMacAddr)
+{
+ static char strMAC[2*ETH_ALEN];
+
+ sprintf(strMAC, "%02X:%02X:%02X:%02X:%02X:%02X",
+ pMacAddr[0], pMacAddr[1], pMacAddr[2],
+ pMacAddr[3], pMacAddr[4], pMacAddr[5]);
+
+ return strMAC;
+}
+
+void *shared_malloc(unsigned int size)
+{
+ void * p;
+ p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
+
+ if (p == MAP_FAILED)
+ p = NULL;
+
+ return p;
+}
+
+extern int forked;
+extern int cluster_sockfd, tunfd, controlfd, daefd, snoopfd, ifrfd, ifr6fd, rand_fd;
+extern int pppoediscfd, pppoesessfd;
+extern int *radfds;
+extern int udpfd[MAX_UDPFD + 1];
+
+pid_t fork_and_close()
+{
+ pid_t pid = fork();
+ int i;
+
+ if (pid)
+ return pid;
-char *inet_toa(unsigned long addr)
+ forked++;
+ if (config->scheduler_fifo)
+ {
+ struct sched_param params = {0};
+ params.sched_priority = 0;
+ if (sched_setscheduler(0, SCHED_OTHER, ¶ms))
+ {
+ 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);
+
+ for (i = 0; i < config->nbudpfd; i++)
+ {
+ if (udpfd[i] != -1) close(udpfd[i]);
+ }
+
+ if (pppoediscfd != -1) close(pppoediscfd);
+ if (pppoediscfd != -1) close(pppoediscfd);
+ 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]);
+
+#ifdef BGP
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ if (bgp_peers[i].sock != -1)
+ close(bgp_peers[i].sock);
+#endif /* BGP */
+
+ return pid;
+}
+
+ssize_t recvfromto(int s, void *buf, size_t len, int flags,
+ struct sockaddr *from, socklen_t *fromlen, struct in_addr *toaddr)
{
- struct in_addr in;
- memcpy(&in, &addr, sizeof(unsigned long));
- return inet_ntoa(in);
+ 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);
+}
projects / l2tpns.git / blobdiff