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#include "toys.h"
int xsocket(int domain, int type, int protocol)
{
int fd = socket(domain, type, protocol);
if (fd < 0) perror_exit("socket %x %x", type, protocol);
return fd;
}
void xsetsockopt(int fd, int level, int opt, void *val, socklen_t len)
{
if (-1 == setsockopt(fd, level, opt, val, len)) perror_exit("setsockopt");
}
int xconnect(char *host, char *port, int family, int socktype, int protocol,
int flags)
{
struct addrinfo info, *ai, *ai2;
int fd;
memset(&info, 0, sizeof(struct addrinfo));
info.ai_family = family;
info.ai_socktype = socktype;
info.ai_protocol = protocol;
info.ai_flags = flags;
fd = getaddrinfo(host, port, &info, &ai);
if (fd || !ai)
error_exit("Connect '%s%s%s': %s", host, port ? ":" : "", port ? port : "",
fd ? gai_strerror(fd) : "not found");
// Try all the returned addresses. Report errors if last entry can't connect.
for (ai2 = ai; ai; ai = ai->ai_next) {
fd = (ai->ai_next ? socket : xsocket)(ai->ai_family, ai->ai_socktype,
ai->ai_protocol);
if (!connect(fd, ai->ai_addr, ai->ai_addrlen)) break;
else if (!ai2->ai_next) perror_exit("connect");
close(fd);
}
freeaddrinfo(ai2);
return fd;
}
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