conform to the standard with respect to types of expressions.

[unix-history] / usr / src / sbin / route / route.c

#ifndef lint
static char sccsid[] = "@(#)route.c     4.6 83/01/06";
#endif

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>

#include <net/route.h>
#include <netinet/in.h>

#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <netdb.h>

struct  rtentry route;
int     options;
int     s;
struct  sockaddr_in sin = { AF_INET };
struct  in_addr inet_makeaddr();

main(argc, argv)
       int argc;
       char *argv[];
{

       if (argc < 2)
               printf("usage: route [ cmd ] [ args ]\n"), exit(1);
       s = socket(AF_INET, SOCK_RAW, 0, 0);
       if (s < 0) {
               perror("route: socket");
               exit(1);
       }
       argc--, argv++;
       if (strcmp(*argv, "add") == 0)
               newroute(argc, argv);
       else if (strcmp(*argv, "delete") == 0)
               newroute(argc, argv);
       else if (strcmp(*argv, "change") == 0)
               changeroute(argc-1, argv+1);
       else
               printf("%s: huh?\n", *argv);
}

newroute(argc, argv)
       int argc;
       char *argv[];
{
       struct sockaddr_in *sin;
       char *cmd;

       if (argc < 3 || argc > 4) {
               printf("usage: %s destination gateway [ metric ]\n", argv[0]);
               return;
       }
       cmd = argv[0];
       getaddr(argv[1], &route.rt_dst);
       getaddr(argv[2], &route.rt_gateway);
       sin = (struct sockaddr_in *)&route.rt_dst;
       route.rt_flags = RTF_UP;
       if (inet_lnaof(sin->sin_addr) != 0)
               route.rt_flags |= RTF_HOST;
       if (argc > 3 && atoi(argv[3]) > 0)
               route.rt_flags |= RTF_GATEWAY;
       printf("%s %x: gateway %x, flags %x\n", cmd, sin->sin_addr,
               ((struct sockaddr_in *)&route.rt_gateway)->sin_addr,
               route.rt_flags);
       if (ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT, (caddr_t)&route))
               error(cmd);
}

changeroute(argc, argv)
       int argc;
       char *argv[];
{
       printf("not supported\n");
}

error(cmd)
       char *cmd;
{
       extern int errno;

       if (errno == ESRCH)
               fprintf(stderr, "not in table\n");
       else if (errno == EBUSY)
               fprintf(stderr, "entry in use\n");
       else if (errno == ENOBUFS)
               fprintf(stderr, "routing table overflow\n");
       else
               perror(cmd);
}

getaddr(s, sin)
       char *s;
       struct sockaddr_in *sin;
{
       struct hostent *hp;
       struct netent *np;
       u_long val;

       hp = gethostbyname(s);
       if (hp) {
               sin->sin_family = hp->h_addrtype;
               bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
               return;
       }
       np = getnetbyname(s);
       if (np) {
               sin->sin_family = np->n_addrtype;
               sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
               return;
       }
       sin->sin_family = AF_INET;
       val = inet_addr(s);
       if (val != -1) {
               sin->sin_addr.s_addr = val;
               return;
       }
       val = inet_network(s);
       if (val != -1) {
               sin->sin_addr = inet_makeaddr(val, INADDR_ANY);
               return;
       }
       fprintf(stderr, "%s: bad value\n", s);
       exit(1);
}