On getaddrinfo() or setsockopt() errors, we leak the flowopts and/or
the local/remote address info structure. Fix this by jumping to the
cleanup section at the bottom of makesock() rather than returning
early without cleaning up.
Moreover, we can not rely on errno containing a valid error code in the
cleanup part of the function because flowopt_cleanup() calls free()
which usually resets errno. So use the error code provided via "rc"
if possible and fall back to the new -E_MAKESOCK if rc is non-negative
to make sure we return a negative value on errors.
PARA_ERROR(SENDMSG, "sendmsg() failed"), \
PARA_ERROR(RECVMSG, "recvmsg() failed"), \
PARA_ERROR(SCM_CREDENTIALS, "did not receive SCM credentials"), \
PARA_ERROR(SENDMSG, "sendmsg() failed"), \
PARA_ERROR(RECVMSG, "recvmsg() failed"), \
PARA_ERROR(SCM_CREDENTIALS, "did not receive SCM credentials"), \
+ PARA_ERROR(MAKESOCK, "makesock error"), \
#define UDP_RECV_ERRORS \
#define UDP_RECV_ERRORS \
const char *host, uint16_t port_number,
struct flowopts *fo)
{
const char *host, uint16_t port_number,
struct flowopts *fo)
{
- struct addrinfo *local = NULL, *src,
- *remote = NULL, *dst, hints;
+ struct addrinfo *local = NULL, *src = NULL, *remote = NULL,
+ *dst = NULL, hints;
unsigned int l3type = AF_UNSPEC;
int rc, on = 1, sockfd = -1,
socktype = sock_type(l4type);
unsigned int l3type = AF_UNSPEC;
int rc, on = 1, sockfd = -1,
socktype = sock_type(l4type);
layer4_name(l4type),
host? host : (passive? "[loopback]" : "[localhost]"),
port, gai_strerror(rc));
layer4_name(l4type),
host? host : (passive? "[loopback]" : "[localhost]"),
port, gai_strerror(rc));
- return -E_ADDRESS_LOOKUP;
+ rc = -E_ADDRESS_LOOKUP;
+ goto out;
}
/* Iterate over all src/dst combination, exhausting dst first */
}
/* Iterate over all src/dst combination, exhausting dst first */
close(sockfd);
PARA_ERROR_LOG("can not set SO_REUSEADDR: %s\n",
strerror(rc));
close(sockfd);
PARA_ERROR_LOG("can not set SO_REUSEADDR: %s\n",
strerror(rc));
- return -ERRNO_TO_PARA_ERROR(rc);
+ rc = -ERRNO_TO_PARA_ERROR(rc);
+ break;
}
flowopt_setopts(sockfd, fo);
}
flowopt_setopts(sockfd, fo);
if (src && (src = src->ai_next)) /* restart inner loop */
dst = remote;
}
if (src && (src = src->ai_next)) /* restart inner loop */
dst = remote;
}
if (local)
freeaddrinfo(local);
if (remote)
if (local)
freeaddrinfo(local);
if (remote)
flowopt_cleanup(fo);
if (src == NULL && dst == NULL) {
flowopt_cleanup(fo);
if (src == NULL && dst == NULL) {
+ if (rc >= 0)
+ rc = -E_MAKESOCK;
PARA_ERROR_LOG("can not create %s socket %s#%s.\n",
layer4_name(l4type), host? host : (passive?
"[loopback]" : "[localhost]"), port);
PARA_ERROR_LOG("can not create %s socket %s#%s.\n",
layer4_name(l4type), host? host : (passive?
"[loopback]" : "[localhost]"), port);
- return -ERRNO_TO_PARA_ERROR(rc);