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Add IPv6 support to pppctl by using getaddrinfo() and trying each address

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it returns. This allows it to connect to the server side again, which
has been listening on IPv6 addresses exclusively for more than 2 years.

PR:		59369
This commit is contained in:
Tim J. Robbins 2003-12-07 08:39:29 +00:00
parent 172293effe
commit 8b45548804
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=123229
1 changed files with 114 additions and 88 deletions
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202
usr.sbin/pppctl/pppctl.c
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@ -332,6 +332,29 @@ Monitor(void *v)
return NULL;
}
static const char *
sockaddr_ntop(const struct sockaddr *sa)
{
const void *addr;
static char addrbuf[INET6_ADDRSTRLEN];
switch (sa->sa_family) {
case AF_INET:
addr = &((const struct sockaddr_in *)sa)->sin_addr;
break;
case AF_UNIX:
addr = &((const struct sockaddr_un *)sa)->sun_path;
break;
case AF_INET6:
addr = &((const struct sockaddr_in6 *)sa)->sin6_addr;
break;
default:
return NULL;
}
inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
return addrbuf;
}
/*
* Connect to ppp using either a local domain socket or a tcp socket.
*
@ -341,12 +364,8 @@ Monitor(void *v)
int
main(int argc, char **argv)
{
struct servent *s;
struct hostent *h;
struct sockaddr *sock;
struct sockaddr_in ifsin;
struct sockaddr_un ifsun;
int n, socksz, arg, fd, len, verbose, save_errno, hide1, hide1off, hide2;
int n, arg, fd, len, verbose, save_errno, hide1, hide1off, hide2;
unsigned TimeoutVal;
char *DoneWord = "x", *next, *start;
struct sigaction act, oact;
@ -424,9 +443,6 @@ main(int argc, char **argv)
}
if (*argv[arg] == '/') {
sock = (struct sockaddr *)&ifsun;
socksz = sizeof ifsun;
memset(&ifsun, '\0', sizeof ifsun);
ifsun.sun_len = strlen(argv[arg]);
if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
@ -440,88 +456,98 @@ main(int argc, char **argv)
warnx("cannot create local domain socket");
return 2;
}
if (connect(fd, (struct sockaddr *)&ifsun, sizeof(ifsun)) < 0) {
if (errno)
warn("cannot connect to socket %s", argv[arg]);
else
warnx("cannot connect to socket %s", argv[arg]);
close(fd);
return 3;
}
} else {
char *port, *host, *colon;
int hlen;
char *addr, *p, *port;
const char *caddr;
struct addrinfo hints, *res, *pai;
int gai;
char local[] = "localhost";
colon = strchr(argv[arg], ':');
if (colon) {
port = colon + 1;
*colon = '\0';
host = argv[arg];
} else {
port = argv[arg];
host = "127.0.0.1";
}
sock = (struct sockaddr *)&ifsin;
socksz = sizeof ifsin;
hlen = strlen(host);
memset(&ifsin, '\0', sizeof ifsin);
if (strspn(host, "0123456789.") == hlen) {
if (!inet_aton(host, &ifsin.sin_addr)) {
warnx("cannot translate %s", host);
return 1;
}
} else if ((h = gethostbyname(host)) == 0) {
warnx("cannot resolve %s", host);
return 1;
}
else
ifsin.sin_addr.s_addr = *(u_long *)h->h_addr_list[0];
if (colon)
*colon = ':';
if (strspn(port, "0123456789") == strlen(port))
ifsin.sin_port = htons(atoi(port));
else if (s = getservbyname(port, "tcp"), !s) {
warnx("%s isn't a valid port or service!", port);
usage();
}
else
ifsin.sin_port = s->s_port;
ifsin.sin_len = sizeof(ifsin);
ifsin.sin_family = AF_INET;
if (fd = socket(AF_INET, SOCK_STREAM, 0), fd < 0) {
warnx("cannot create internet socket");
return 2;
}
}
TimedOut = 0;
if (TimeoutVal) {
act.sa_handler = Timeout;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
sigaction(SIGALRM, &act, &oact);
alarm(TimeoutVal);
}
if (connect(fd, sock, socksz) < 0) {
if (TimeoutVal) {
save_errno = errno;
alarm(0);
sigaction(SIGALRM, &oact, 0);
errno = save_errno;
}
if (TimedOut)
warnx("timeout: cannot connect to socket %s", argv[arg]);
else {
if (errno)
warn("cannot connect to socket %s", argv[arg]);
else
warnx("cannot connect to socket %s", argv[arg]);
}
close(fd);
return 3;
}
if (TimeoutVal) {
alarm(0);
sigaction(SIGALRM, &oact, 0);
addr = argv[arg];
if (addr[strspn(addr, "0123456789")] == '\0') {
/* port on local machine */
port = addr;
addr = local;
} else if (*addr == '[') {
/* [addr]:port */
if ((p = strchr(addr, ']')) == NULL) {
warnx("%s: mismatched '['", addr);
return 1;
}
addr++;
*p++ = '\0';
if (*p != ':') {
warnx("%s: missing port", addr);
return 1;
}
port = ++p;
} else {
/* addr:port */
p = addr + strcspn(addr, ":");
if (*p != ':') {
warnx("%s: missing port", addr);
return 1;
}
*p++ = '\0';
port = p;
}
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
gai = getaddrinfo(addr, port, &hints, &res);
if (gai != 0) {
warnx("%s: %s", addr, gai_strerror(gai));
return 1;
}
for (pai = res; pai != NULL; pai = pai->ai_next) {
if (fd = socket(pai->ai_family, pai->ai_socktype,
pai->ai_protocol), fd < 0) {
warnx("cannot create socket");
continue;
}
TimedOut = 0;
if (TimeoutVal) {
act.sa_handler = Timeout;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
sigaction(SIGALRM, &act, &oact);
alarm(TimeoutVal);
}
if (connect(fd, pai->ai_addr, pai->ai_addrlen) == 0)
break;
if (TimeoutVal) {
save_errno = errno;
alarm(0);
sigaction(SIGALRM, &oact, 0);
errno = save_errno;
}
caddr = sockaddr_ntop(pai->ai_addr);
if (caddr == NULL)
caddr = argv[arg];
if (TimedOut)
warnx("timeout: cannot connect to %s", caddr);
else {
if (errno)
warn("cannot connect to %s", caddr);
else
warnx("cannot connect to %s", caddr);
}
close(fd);
}
freeaddrinfo(res);
if (pai == NULL)
return 1;
if (TimeoutVal) {
alarm(0);
sigaction(SIGALRM, &oact, 0);
}
}
len = 0;