82 lines
1.5 KiB
C
82 lines
1.5 KiB
C
/* See LICENSE file for license details. */
|
|
#include <netdb.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/socket.h>
|
|
|
|
static void
|
|
eprint(const char *fmt, ...) {
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(bufout, sizeof bufout, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, "%s", bufout);
|
|
if(fmt[0] && fmt[strlen(fmt) - 1] == ':')
|
|
fprintf(stderr, " %s\n", strerror(errno));
|
|
exit(1);
|
|
}
|
|
|
|
static int
|
|
dial(char *host, char *port) {
|
|
static struct addrinfo hints;
|
|
int srv;
|
|
struct addrinfo *res, *r;
|
|
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
if(getaddrinfo(host, port, &hints, &res) != 0)
|
|
eprint("error: cannot resolve hostname '%s':", host);
|
|
for(r = res; r; r = r->ai_next) {
|
|
if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
|
|
continue;
|
|
if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
|
|
break;
|
|
close(srv);
|
|
}
|
|
freeaddrinfo(res);
|
|
if(!r)
|
|
eprint("error: cannot connect to host '%s'\n", host);
|
|
return srv;
|
|
}
|
|
|
|
#define strlcpy _strlcpy
|
|
static void
|
|
strlcpy(char *to, const char *from, int l) {
|
|
memccpy(to, from, '\0', l);
|
|
to[l-1] = '\0';
|
|
}
|
|
|
|
static void
|
|
eat(char **s, int (*p)(int), int r) {
|
|
char *q;
|
|
|
|
for(q = *s; *q && p(*q) == r; q++)
|
|
;
|
|
*s = q;
|
|
}
|
|
|
|
static char*
|
|
tok(char **s) {
|
|
char *p;
|
|
|
|
eat(s, isspace, 1);
|
|
p = *s;
|
|
eat(s, isspace, 0);
|
|
if(**s)
|
|
*(*s)++ = '\0';
|
|
return p;
|
|
}
|
|
|
|
static char*
|
|
ctok(char **s, int c) {
|
|
char *p, *q;
|
|
|
|
q = *s;
|
|
for(p = q; *p && *p != c; p++)
|
|
;
|
|
if(*p) *p++ = '\0';
|
|
*s = p;
|
|
return q;
|
|
}
|