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#include "fmt.h"
#include "buffer.h"
#include "socket.h"
#include "error.h"
#include "iopause.h"
#include "timeoutconn.h"
#include "remoteinfo.h"
static struct taia now;
static struct taia deadline;
static int mywrite(int fd,char *buf,int len)
{
iopause_fd x;
x.fd = fd;
x.events = IOPAUSE_WRITE;
for (;;) {
taia_now(&now);
iopause(&x,1,&deadline,&now);
if (x.revents) break;
if (taia_less(&deadline,&now)) {
errno = error_timeout;
return -1;
}
}
return write(fd,buf,len);
}
static int myread(int fd,char *buf,int len)
{
iopause_fd x;
x.fd = fd;
x.events = IOPAUSE_READ;
for (;;) {
taia_now(&now);
iopause(&x,1,&deadline,&now);
if (x.revents) break;
if (taia_less(&deadline,&now)) {
errno = error_timeout;
return -1;
}
}
return read(fd,buf,len);
}
static int doit(stralloc *out,int s,char ipremote[4],uint16 portremote,char iplocal[4],uint16 portlocal,unsigned int timeout)
{
buffer b;
char bspace[128];
char strnum[FMT_ULONG];
int numcolons;
char ch;
if (socket_bind4(s,iplocal,0) == -1) return -1;
if (timeoutconn(s,ipremote,113,timeout) == -1) return -1;
buffer_init(&b,mywrite,s,bspace,sizeof bspace);
buffer_put(&b,strnum,fmt_ulong(strnum,portremote));
buffer_put(&b," , ",3);
buffer_put(&b,strnum,fmt_ulong(strnum,portlocal));
buffer_put(&b,"\r\n",2);
if (buffer_flush(&b) == -1) return -1;
buffer_init(&b,myread,s,bspace,sizeof bspace);
numcolons = 0;
for (;;) {
if (buffer_get(&b,&ch,1) != 1) return -1;
if ((ch == ' ') || (ch == '\t') || (ch == '\r')) continue;
if (ch == '\n') return 0;
if (numcolons < 3) {
if (ch == ':') ++numcolons;
}
else {
if (!stralloc_append(out,&ch)) return -1;
if (out->len > 256) return 0;
}
}
}
int remoteinfo(stralloc *out,char ipremote[4],uint16 portremote,char iplocal[4],uint16 portlocal,unsigned int timeout)
{
int s;
int r;
if (!stralloc_copys(out,"")) return -1;
taia_now(&now);
taia_uint(&deadline,timeout);
taia_add(&deadline,&now,&deadline);
s = socket_tcp();
if (s == -1) return -1;
r = doit(out,s,ipremote,portremote,iplocal,portlocal,timeout);
close(s);
return r;
}
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