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Turn select() usage in tor-fw-helper into a function.

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This commit is contained in:
Nick Mathewson 2010-09-30 11:49:41 -04:00
parent a6dc00fa75
commit 1779fee27a
1 changed files with 28 additions and 25 deletions
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49
src/tools/tor-fw-helper/tor-fw-helper-natpmp.c
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@ -80,6 +80,29 @@ tor_natpmp_cleanup(tor_fw_options_t *tor_fw_options, void *backend_state)
return r; return r;
} }
/** Use select() to wait until we can read on fd. */
static int
wait_until_fd_readable(int fd, struct timeval *timeout)
{
int r;
fd_set fds;
if (fd >= FD_SETSIZE) {
fprintf(stderr, "E: NAT-PMP FD_SETSIZE error %d\n", fd);
return -1;
}
FD_ZERO(&fds);
FD_SET(fd, &fds);
r = select(fd+1, &fds, NULL, NULL, timeout);
if (r == -1) {
fprintf(stdout, "V: select failed in wait_until_fd_readable: %s\n",
strerror(errno));
return -1;
}
/* XXXX we should really check to see whether fd was readable, or we timed
out. */
return 0;
}
/** Add a TCP port mapping for a single port stored in <b>tor_fw_options</b> /** Add a TCP port mapping for a single port stored in <b>tor_fw_options</b>
* using the <b>natpmp_t</b> stored in <b>backend_state</b>. */ * using the <b>natpmp_t</b> stored in <b>backend_state</b>. */
int int
@ -91,7 +114,6 @@ tor_natpmp_add_tcp_mapping(tor_fw_options_t *tor_fw_options,
int x = 0; int x = 0;
int sav_errno; int sav_errno;
fd_set fds;
struct timeval timeout; struct timeval timeout;
if (tor_fw_options->verbose) if (tor_fw_options->verbose)
@ -105,16 +127,10 @@ tor_natpmp_add_tcp_mapping(tor_fw_options_t *tor_fw_options,
"returned %d (%s)\n", r, r==12?"SUCCESS":"FAILED"); "returned %d (%s)\n", r, r==12?"SUCCESS":"FAILED");
do { do {
FD_ZERO(&fds);
FD_SET(state->natpmp.s, &fds);
getnatpmprequesttimeout(&(state->natpmp), &timeout); getnatpmprequesttimeout(&(state->natpmp), &timeout);
x = select(FD_SETSIZE, &fds, NULL, NULL, &timeout); x = wait_until_fd_readable(state->natpmp.s, &timeout);
if (x == -1) if (x == -1)
{
fprintf(stdout, "V: select failed in "
"tor_natpmp_fetch_public_ip.\n");
return -1; return -1;
}
if (tor_fw_options->verbose) if (tor_fw_options->verbose)
fprintf(stdout, "V: attempting to readnatpmpreponseorretry...\n"); fprintf(stdout, "V: attempting to readnatpmpreponseorretry...\n");
@ -166,30 +182,17 @@ tor_natpmp_fetch_public_ip(tor_fw_options_t *tor_fw_options,
natpmp_state_t *state = (natpmp_state_t *) backend_state; natpmp_state_t *state = (natpmp_state_t *) backend_state;
struct timeval timeout; struct timeval timeout;
fd_set fds;
r = sendpublicaddressrequest(&(state->natpmp)); r = sendpublicaddressrequest(&(state->natpmp));
fprintf(stdout, "tor-fw-helper: NAT-PMP sendpublicaddressrequest returned" fprintf(stdout, "tor-fw-helper: NAT-PMP sendpublicaddressrequest returned"
" %d (%s)\n", r, r==2?"SUCCESS":"FAILED"); " %d (%s)\n", r, r==2?"SUCCESS":"FAILED");
do { do {
if (state->natpmp.s >= FD_SETSIZE)
{
fprintf(stderr, "E: NAT-PMP FD_SETSIZE error %d\n",
state->natpmp.s);
return -1;
}
FD_ZERO(&fds);
FD_SET(state->natpmp.s, &fds);
getnatpmprequesttimeout(&(state->natpmp), &timeout); getnatpmprequesttimeout(&(state->natpmp), &timeout);
x = select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
x = wait_until_fd_readable(state->natpmp.s, &timeout);
if (x == -1) if (x == -1)
{
fprintf(stdout, "V: select failed in "
"tor_natpmp_fetch_public_ip.\n");
return -1; return -1;
}
if (tor_fw_options->verbose) if (tor_fw_options->verbose)
fprintf(stdout, "V: NAT-PMP attempting to read reponse...\n"); fprintf(stdout, "V: NAT-PMP attempting to read reponse...\n");