mirror of
https://github.com/9fans/plan9port.git
synced 2025-01-15 11:20:03 +00:00
145 lines
3 KiB
C
145 lines
3 KiB
C
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#include <u.h>
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/* #include <everything_but_the_kitchen_sink.h> */
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <libc.h>
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#include <ip.h>
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static void
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sockaddr2ip(uchar *ip, struct sockaddr *sa)
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{
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struct sockaddr_in *sin;
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sin = (struct sockaddr_in*)sa;
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memmove(ip, v4prefix, IPaddrlen);
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memmove(ip+IPv4off, &sin->sin_addr, 4);
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}
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Ipifc*
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readipifc(char *net, Ipifc *ifc, int index)
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{
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char *p, *ep, *q;
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int i, mib[6], n, alloc;
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Ipifc *list, **last;
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Iplifc *lifc, **lastlifc;
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struct if_msghdr *mh, *nmh;
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struct ifa_msghdr *ah;
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struct sockaddr *sa;
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struct sockaddr_dl *sdl;
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uchar ip[IPaddrlen];
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USED(net);
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free(ifc);
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ifc = nil;
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list = nil;
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last = &list;
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/*
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* Does not handle IPv6 yet.
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*/
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0;
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mib[3] = 0;
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mib[4] = NET_RT_IFLIST;
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mib[5] = 0;
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if(sysctl(mib, 6, nil, &n, nil, 0) < 0)
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return nil;
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p = mallocz(n, 1);
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if(p == nil)
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return nil;
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if(sysctl(mib, 6, p, &n, nil, 0) < 0){
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free(p);
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return nil;
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}
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ep = p+n;
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while(p < ep){
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mh = (struct if_msghdr*)p;
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p += mh->ifm_msglen;
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if(mh->ifm_type != RTM_IFINFO)
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continue;
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ifc = mallocz(sizeof *ifc, 1);
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if(ifc == nil)
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break;
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*last = ifc;
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last = &ifc->next;
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sdl = (struct sockaddr_dl*)(mh+1);
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n = sdl->sdl_nlen;
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if(n >= sizeof ifc->dev)
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n = sizeof ifc->dev - 1;
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memmove(ifc->dev, sdl->sdl_data, n);
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ifc->dev[n] = 0;
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ifc->rp.linkmtu = mh->ifm_data.ifi_mtu;
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lastlifc = &ifc->lifc;
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while(p < ep){
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ah = (struct ifa_msghdr*)p;
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nmh = (struct if_msghdr*)p;
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if(nmh->ifm_type != RTM_NEWADDR)
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break;
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p += nmh->ifm_msglen;
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alloc = 0;
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for(i=0, q=(char*)(ah+1); i<RTAX_MAX && q<p; i++){
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if(!(ah->ifam_addrs & (1<<i)))
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continue;
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sa = (struct sockaddr*)q;
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q += (sa->sa_len+sizeof(long)-1) & ~(sizeof(long)-1);
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if(sa->sa_family == AF_LINK && i == RTAX_IFA){
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struct sockaddr_dl *e;
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if(e->sdl_type == IFT_ETHER && e->sdl_alen == 6)
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memmove(ifc->ether, LLADDR(e), 6);
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}
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if(sa->sa_family != AF_INET)
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continue;
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if(alloc == 0){
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alloc = 1;
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lifc = mallocz(sizeof *lifc, 1);
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*lastlifc = lifc;
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lastlifc = &lifc->next;
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}
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sockaddr2ip(ip, sa);
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switch(i){
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case RTAX_IFA:
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ipmove(lifc->ip, ip);
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break;
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case RTAX_NETMASK:
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memset(ip, 0xFF, IPv4off);
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ipmove(lifc->mask, ip);
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break;
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case RTAX_BRD:
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if(mh->ifm_flags & IFF_POINTOPOINT)
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/* ipmove(lifc->remote, ip) */ ;
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if(mh->ifm_flags & IFF_BROADCAST)
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/* ipmove(lifc->bcast, ip) */ ;
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break;
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case RTAX_GATEWAY:
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break;
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case RTAX_DST:
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break;
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}
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}
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maskip(lifc->ip, lifc->mask, lifc->net);
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}
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}
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return list;
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}
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