0af11f97b5
we want to accept V4 subnets in CIDR notation consistently which means we need to interpret the mask in context of the IP address. so parseipmask() now has an additional v4 flag argument which offsets the prefixlength by 96 so a /24 will be interpreted as a /120. parseipandmask() is the new function which handles this automatically depending on the ip address type. v4parsecidr() is now obsolete.
203 lines
4.3 KiB
C
203 lines
4.3 KiB
C
#pragma src "/sys/src/libip"
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#pragma lib "libip.a"
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enum
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{
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IPaddrlen= 16,
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IPv4addrlen= 4,
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IPv4off= 12,
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IPllen= 4,
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IPV4HDR_LEN= 20,
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/* vihl & vcf[0] values */
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IP_VER4= 0x40,
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IP_VER6= 0x60,
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};
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/*
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* for reading /net/ipifc
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*/
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typedef struct Ipifc Ipifc;
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typedef struct Iplifc Iplifc;
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typedef struct Ipv6rp Ipv6rp;
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/* local address */
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struct Iplifc
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{
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Iplifc *next;
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/* per address on the ip interface */
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uchar ip[IPaddrlen];
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uchar mask[IPaddrlen];
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uchar net[IPaddrlen]; /* ip & mask */
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ulong preflt; /* preferred lifetime */
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ulong validlt; /* valid lifetime */
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};
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/* default values, one per stack */
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struct Ipv6rp
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{
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int mflag;
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int oflag;
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int maxraint;
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int minraint;
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int linkmtu;
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int reachtime;
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int rxmitra;
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int ttl;
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int routerlt;
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};
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/* actual interface */
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struct Ipifc
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{
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Ipifc *next;
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Iplifc *lifc;
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/* per ip interface */
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int index; /* number of interface in ipifc dir */
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char dev[64];
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uchar sendra6; /* on == send router adv */
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uchar recvra6; /* on == rcv router adv */
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int mtu;
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ulong pktin;
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ulong pktout;
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ulong errin;
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ulong errout;
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Ipv6rp rp;
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};
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#define ISIPV6MCAST(addr) ((addr)[0] == 0xff)
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#define ISIPV6LINKLOCAL(addr) ((addr)[0] == 0xfe && ((addr)[1] & 0xc0) == 0x80)
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/*
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* ipv6 constants
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* `ra' is `router advertisement', `rs' is `router solicitation'.
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* `na' is `neighbour advertisement'.
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*/
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enum {
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IPV6HDR_LEN = 40,
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/* neighbour discovery option types */
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V6nd_srclladdr = 1,
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V6nd_targlladdr = 2,
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V6nd_pfxinfo = 3,
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V6nd_redirhdr = 4,
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V6nd_mtu = 5,
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/* new since rfc2461; see iana.org/assignments/icmpv6-parameters */
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V6nd_home = 8,
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V6nd_srcaddrs = 9, /* rfc3122 */
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V6nd_ip = 17,
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V6nd_rdns = 25, /* rfc6106 */
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V6nd_rdnssl = 31,
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/* plan 9 extensions */
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V6nd_9fs = 250,
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V6nd_9auth = 251,
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/* Router constants (all times in ms.) */
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Maxv6initraintvl= 16000,
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Maxv6initras = 3,
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Maxv6finalras = 3,
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Minv6interradelay= 3000,
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Maxv6radelay = 500,
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/* Host constants */
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Maxv6rsdelay = 1000,
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V6rsintvl = 4000,
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Maxv6rss = 3,
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/* Node constants */
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Maxv6mcastrss = 3,
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Maxv6unicastrss = 3,
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Maxv6anycastdelay= 1000,
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Maxv6na = 3,
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V6reachabletime = 30000,
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V6retranstimer = 1000,
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V6initprobedelay= 5000,
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};
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/* V6 header on the wire */
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typedef struct Ip6hdr Ip6hdr;
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struct Ip6hdr {
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uchar vcf[4]; /* version:4, traffic class:8, flow label:20 */
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uchar ploadlen[2]; /* payload length: packet length - 40 */
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uchar proto; /* next header type */
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uchar ttl; /* hop limit */
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uchar src[IPaddrlen]; /* source address */
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uchar dst[IPaddrlen]; /* destination address */
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uchar payload[];
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};
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/*
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* user-level icmpv6 with control message "headers"
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*/
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typedef struct Icmp6hdr Icmp6hdr;
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struct Icmp6hdr {
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uchar _0_[8];
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uchar laddr[IPaddrlen]; /* local address */
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uchar raddr[IPaddrlen]; /* remote address */
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};
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/*
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* user level udp headers with control message "headers"
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*/
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enum
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{
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Udphdrsize= 52, /* size of a Udphdr */
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};
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typedef struct Udphdr Udphdr;
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struct Udphdr
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{
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uchar raddr[IPaddrlen]; /* V6 remote address */
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uchar laddr[IPaddrlen]; /* V6 local address */
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uchar ifcaddr[IPaddrlen]; /* V6 ifc addr msg was received on */
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uchar rport[2]; /* remote port */
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uchar lport[2]; /* local port */
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};
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uchar* defmask(uchar*);
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void maskip(uchar*, uchar*, uchar*);
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int eipfmt(Fmt*);
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int isv4(uchar*);
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vlong parseip(uchar*, char*);
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vlong parseipmask(uchar*, char*, int);
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vlong parseipandmask(uchar*, uchar*, char*, char*);
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char* v4parseip(uchar*, char*);
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int parseether(uchar*, char*);
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int myipaddr(uchar*, char*);
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int myetheraddr(uchar*, char*);
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int equivip4(uchar*, uchar*);
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int equivip6(uchar*, uchar*);
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Ipifc* readipifc(char*, Ipifc*, int);
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void hnputv(void*, uvlong);
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void hnputl(void*, uint);
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void hnputs(void*, ushort);
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uvlong nhgetv(void*);
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uint nhgetl(void*);
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ushort nhgets(void*);
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ushort ptclbsum(uchar*, int);
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int v6tov4(uchar*, uchar*);
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void v4tov6(uchar*, uchar*);
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#define ipcmp(x, y) memcmp(x, y, IPaddrlen)
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#define ipmove(x, y) memmove(x, y, IPaddrlen)
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extern uchar IPv4bcast[IPaddrlen];
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extern uchar IPv4bcastobs[IPaddrlen];
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extern uchar IPv4allsys[IPaddrlen];
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extern uchar IPv4allrouter[IPaddrlen];
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extern uchar IPnoaddr[IPaddrlen];
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extern uchar v4prefix[IPaddrlen];
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extern uchar IPallbits[IPaddrlen];
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#define CLASS(p) ((*(uchar*)(p))>>6)
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#pragma varargck type "I" uchar*
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#pragma varargck type "V" uchar*
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#pragma varargck type "E" uchar*
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#pragma varargck type "M" uchar*
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