Hi , I have found some bug in
ip_helper_generic.c =>
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#elif defined(SIOCGIFCONF) && \
defined(PJ_HAS_NET_IF_H) && PJ_HAS_NET_IF_H != 0
/* Note: this does not work with IPv6 */
static pj_status_t if_enum_by_af(int af,unsigned *p_cnt,pj_sockaddr ifs[])
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In the for loop below this function , the
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if ((itf->ifr_flags & IFF_UP)==0) {
TRACE_((THIS_FILE, " interface is down"));
continue; /* Skip when interface is down*/
}
if (itf->ifr_flags & IFF_LOOPBACK) {
TRACE_((THIS_FILE, " loopback interface"));
continue; /* Skip loopback interface */
}
-------------------------------------------------------------------------
will be always fail ( in my test ) !!
I have found the reason is "ifr_addr" and "ifr_flags" are occupied the same
memory space
(union , refer below codes from <linux/if.h> ) !!
I modified two place by myself and hope have correct version by the original
authors !!
<1> Added
ioctl(sock, SIOCGIFFLAGS, &ifreq_temp) != 0
before check ifr_flags !!
ifreq_temp is local variable just for checking flags !!
<2>Modified
pj_sock_close(sock);
place to the end of this function
because <1> will use it !!
Thanks for your pjsip !!
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struct ifreq
{
#define IFHWADDRLEN 6
#define IFNAMSIZ 16
union
{
char ifrn_name[IFNAMSIZ]; /* if name, e.g.
"en0" */
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
char ifru_newname[IFNAMSIZ];
char * ifru_data;
struct if_settings ifru_settings;
} ifr_ifru;
};
#define ifr_name ifr_ifrn.ifrn_name /* interface name */
#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
#define ifr_addr ifr_ifru.ifru_addr /* address */
#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */
#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
#define ifr_flags ifr_ifru.ifru_flags /* flags */
#define ifr_metric ifr_ifru.ifru_ivalue /* metric */
#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
#define ifr_map ifr_ifru.ifru_map /* device map */
#define ifr_slave ifr_ifru.ifru_slave /* slave device */
#define ifr_data ifr_ifru.ifru_data /* for use by interface */
#define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index */
#define ifr_bandwidth ifr_ifru.ifru_ivalue /* link bandwidth */
#define ifr_qlen ifr_ifru.ifru_ivalue /* Queue length */
#define ifr_newname ifr_ifru.ifru_newname /* New name */
#define ifr_settings ifr_ifru.ifru_settings /* Device/proto settings*/
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