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#include <u.h>
#include <libc.h>
#include <netdb.h>
#include <sys/un.h>
static char *nets[] = { "tcp", "udp", nil };
#define CLASS(p) ((*(uchar*)(p))>>6)
static int
parseip(char *host, u32int *pip)
{
uchar addr[4];
int x, i;
char *p;
p = host;
for(i=0; i<4 && *p; i++){
x = strtoul(p, &p, 0);
if(x < 0 || x >= 256)
return -1;
if(*p != '.' && *p != 0)
return -1;
if(*p == '.')
p++;
addr[i] = x;
}
switch(CLASS(addr)){
case 0:
case 1:
if(i == 3){
addr[3] = addr[2];
addr[2] = addr[1];
addr[1] = 0;
}else if(i == 2){
addr[3] = addr[1];
addr[2] = 0;
addr[1] = 0;
}else if(i != 4)
return -1;
break;
case 2:
if(i == 3){
addr[3] = addr[2];
addr[2] = 0;
}else if(i != 4)
return -1;
break;
}
*pip = *(u32int*)addr;
return 0;
}
int
_p9dialparse(char *addr, char **pnet, char **punix, u32int *phost, int *pport)
{
char *net, *host, *port, *e;
int i;
struct servent *se;
struct hostent *he;
struct sockaddr_un *sun;
if(strncmp(addr, "/net/", 5) == 0)
addr += 5;
net = addr;
if((host = strchr(net, '!')) == nil){
werrstr("malformed address");
return -1;
}
*host++ = 0;
if((port = strchr(host, '!')) == nil){
if(strcmp(net, "unix")==0 || strcmp(net, "net")==0){
Unix:
if(strlen(host)+1 > sizeof sun->sun_path){
werrstr("unix socket name too long");
return -1;
}
*punix = host;
*pnet = "unix";
*phost = 0;
*pport = 0;
return 0;
}
werrstr("malformed address");
return -1;
}
*port++ = 0;
if(*host == 0){
werrstr("malformed address (empty host)");
return -1;
}
if(*port == 0){
werrstr("malformed address (empty port)");
return -1;
}
if(strcmp(net, "unix") == 0)
goto Unix;
if(strcmp(net, "tcp")!=0 && strcmp(net, "udp")!=0){
werrstr("bad network %s!%s!%s", net, host, port);
return -1;
}
/* translate host */
if(strcmp(host, "*") == 0)
*phost = 0;
else if(parseip(host, phost) == 0)
{}
else if((he = gethostbyname(host)) != nil)
*phost = *(u32int*)(he->h_addr);
else{
werrstr("unknown host %s", host);
return -1;
}
/* translate network and port; should return list rather than first */
if(strcmp(net, "net") == 0){
for(i=0; nets[i]; i++){
if((se = getservbyname(port, nets[i])) != nil){
*pnet = nets[i];
*pport = ntohs(se->s_port);
return 0;
}
}
werrstr("unknown service %s", port);
return -1;
}
if(strcmp(net, "tcp") != 0 && strcmp(net, "udp") != 0){
werrstr("unknown network %s", net);
return -1;
}
*pnet = net;
i = strtol(port, &e, 0);
if(*e == 0){
*pport = i;
return 0;
}
if((se = getservbyname(port, net)) != nil){
*pport = ntohs(se->s_port);
return 0;
}
werrstr("unknown service %s", port);
return -1;
}
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