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         "\006tcp\0"
  13         "\014pup\0"
  14         "\021udp\0"
  15         "\026idp\0"
  16         "\051ipv6\0"
  17         "\053ipv6-route\0"
  18         "\054ipv6-frag\0"
  19         "\057gre\0"
  20         "\062esp\0"
  21         "\063ah\0"
  22         "\072ipv6-icmp\0"
  23         "\073ipv6-nonxt\0"
  24         "\074ipv6-opts\0"
  25         "\131ospf\0"
  26         "\136ipip\0"
  27         "\147pim\0"
  28         "\377raw"
  29 };
  30
  31 void endprotoent(void)
  32 {
  33         idx = 0;
  34 }
  35
  36 void setprotoent(int stayopen)
  37 {
  38         idx = 0;
  39 }
  40
  41 struct protoent *getprotoent(void)
  42 {
  43         static struct protoent p;
  44         static const char *aliases;
  45         if (idx >= sizeof protos) return NULL;
  46         p.p_proto = protos[idx];
  47         p.p_name = (char *)&protos[idx+1];
  48         p.p_aliases = (char **)&aliases;
  49         idx += strlen(p.p_name) + 2;
  50         return &p;
  51 }
  52
  53 struct protoent *getprotobyname(const char *name)
  54 {
  55         struct protoent *p;
  56         endprotoent();
  57         do p = getprotoent();
  58         while (p && strcmp(name, p->p_name));
  59         return p;
  60 }
  61
  62 struct protoent *getprotobynumber(int num)
  63 {
  64         struct protoent *p;
  65         endprotoent();
  66         do p = getprotoent();
  67         while (p && p->p_proto != num);
  68         return p;
  69 }