nsz Git - musl/blob - src/network/proto.c

   1 #include <netdb.h>
   2 #include <string.h>
   3
   4 /* do we really need all these?? */
   5
   6 static int idx;
   7 static const unsigned char protos[] = {
   8         "\000ip\0"
   9         "\001icmp\0"
  10         "\002igmp\0"
  11         "\003ggp\0"
  12         "\004ipencap\0"
  13         "\005st\0"
  14         "\006tcp\0"
  15         "\010egp\0"
  16         "\014pup\0"
  17         "\021udp\0"
  18         "\024hmp\0"
  19         "\026xns-idp\0"
  20         "\033rdp\0"
  21         "\035iso-tp4\0"
  22         "\044xtp\0"
  23         "\045ddp\0"
  24         "\046idpr-cmtp\0"
  25         "\051ipv6\0"
  26         "\053ipv6-route\0"
  27         "\054ipv6-frag\0"
  28         "\055idrp\0"
  29         "\056rsvp\0"
  30         "\057gre\0"
  31         "\062esp\0"
  32         "\063ah\0"
  33         "\071skip\0"
  34         "\072ipv6-icmp\0"
  35         "\073ipv6-nonxt\0"
  36         "\074ipv6-opts\0"
  37         "\111rspf\0"
  38         "\121vmtp\0"
  39         "\131ospf\0"
  40         "\136ipip\0"
  41         "\142encap\0"
  42         "\147pim\0"
  43         "\377raw"
  44 };
  45
  46 void endprotoent(void)
  47 {
  48         idx = 0;
  49 }
  50
  51 void setprotoent(int stayopen)
  52 {
  53         idx = 0;
  54 }
  55
  56 struct protoent *getprotoent(void)
  57 {
  58         static struct protoent p;
  59         static const char *aliases;
  60         if (idx >= sizeof protos) return NULL;
  61         p.p_proto = protos[idx];
  62         p.p_name = (char *)&protos[idx+1];
  63         p.p_aliases = (char **)&aliases;
  64         idx += strlen(p.p_name) + 2;
  65         return &p;
  66 }
  67
  68 struct protoent *getprotobyname(const char *name)
  69 {
  70         struct protoent *p;
  71         endprotoent();
  72         do p = getprotoent();
  73         while (p && strcmp(name, p->p_name));
  74         return p;
  75 }
  76
  77 struct protoent *getprotobynumber(int num)
  78 {
  79         struct protoent *p;
  80         endprotoent();
  81         do p = getprotoent();
  82         while (p && p->p_proto != num);
  83         return p;
  84 }