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WIP: check receiving interface index when receiving SSDP

This commit is contained in:
Thomas Bernard 2017-05-24 11:04:53 +02:00
parent 6ed6b4e607
commit 8b6cdff7d7
1 changed files with 94 additions and 0 deletions
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94
miniupnpd/minissdp.c
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@ -16,6 +16,12 @@
#include <errno.h>
#include <syslog.h>
#ifdef IP_RECVIF
#include <sys/types.h>
#include <net/if.h>
#include <net/if_dl.h>
#endif
#include "config.h"
#if defined(ENABLE_IPV6) && defined(UPNP_STRICT)
#include <ifaddrs.h>
@ -189,6 +195,24 @@ OpenAndConfSSDPReceiveSocket(int ipv6)
{
syslog(LOG_WARNING, "setsockopt(udp, SO_REUSEADDR): %m");
}
#ifdef IP_RECVIF
/* BSD */
if(!ipv6) {
if(setsockopt(s, IPPROTO_IP, IP_RECVIF, &on, sizeof(on)) < 0)
{
syslog(LOG_WARNING, "setsockopt(udp, IPRECVIF): %m");
}
}
#endif /* IP_RECVIF */
#ifdef IP_PKTINFO
/* Linux */
if(!ipv6) {
if(setsockopt(s, IPPROTO_IP, IP_RECVIF, &on, sizeof(on)) < 0)
{
syslog(LOG_WARNING, "setsockopt(udp, IPRECVIF): %m");
}
}
#endif /* IP_PKTINFO */
if(!set_non_blocking(s))
{
@ -796,9 +820,54 @@ ProcessSSDPRequest(int s, unsigned short http_port)
struct sockaddr_in sendername;
len_r = sizeof(struct sockaddr_in);
#endif
int source_ifindex = -1;
#ifdef IP_PKTINFO
char cmbuf[CMSG_SPACE(sizeof(struct in_pktinfo))];
struct iovec iovec = {
.iov_base = bufr,
.iov_len = sizeof(bufr)
};
struct msghdr mh = {
.msg_name = &sendername,
#ifdef ENABLE_IPV6
.msg_namelen = sizeof(struct sockaddr_storage),
#else
.msg_namelen = sizeof(struct sockaddr_in),
#endif
.msg_iov = &iovec,
.msg_iovlen = 1,
.msg_control = cmbuf,
.msg_controllen = sizeof(cmbuf)
};
struct cmsghdr *cmptr;
#endif /* IP_PKTINFO */
#ifdef IP_RECVIF
char cmbuf[CMSG_SPACE(sizeof(struct sockaddr_dl))];
struct iovec iovec = {
.iov_base = bufr,
.iov_len = sizeof(bufr)
};
struct msghdr mh = {
.msg_name = &sendername,
#ifdef ENABLE_IPV6
.msg_namelen = sizeof(struct sockaddr_storage),
#else
.msg_namelen = sizeof(struct sockaddr_in),
#endif
.msg_iov = &iovec,
.msg_iovlen = 1,
.msg_control = cmbuf,
.msg_controllen = sizeof(cmbuf)
};
struct cmsghdr *cmptr;
#endif /* IP_RECVIF */
#if defined(IP_RECVIF) || defined(IP_PKTINFO)
n = recvmsg(s, &mh, 0);
#else
n = recvfrom(s, bufr, sizeof(bufr), 0,
(struct sockaddr *)&sendername, &len_r);
#endif /* defined(IP_RECVIF) || defined(IP_PKTINFO) */
if(n < 0)
{
/* EAGAIN, EWOULDBLOCK, EINTR : silently ignore (try again next time)
@ -811,6 +880,31 @@ ProcessSSDPRequest(int s, unsigned short http_port)
}
return;
}
#if defined(IP_RECVIF) || defined(IP_PKTINFO)
for(cmptr = CMSG_FIRSTHDR(&mh); cmptr != NULL; cmptr = CMSG_NXTHDR(&mh, cmptr))
{
syslog(LOG_DEBUG, "level=%d type=%d", cmptr->cmsg_level, cmptr->cmsg_type);
#ifdef IP_PKTINFO
if(cmptr->cmsg_level == IPPROTO_IP && cmsg->cmsg_type == IP_PKTINFO)
{
struct in_pktinfo * pi; /* fields : ifindex, spec_dst, addr */
pi = (struct in_pktinfo *)CMSG_DATA(cmsg);
syslog(LOG_DEBUG, "ifindex = %u %s", ip->ipi_ifindex, inet_ntoa(pi->ipi_spec_dst));
source_ifindex = ip->ipi_ifindex;
}
#endif /* IP_PKTINFO */
#ifdef IP_RECVIF
if(cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVIF)
{
struct sockaddr_dl *sdl; /* fields : len, family, index, type, nlen, alen, slen, data */
sdl = (struct sockaddr_dl *)CMSG_DATA(cmptr);
syslog(LOG_DEBUG, "sdl_index = %d %s", sdl->sdl_index, link_ntoa(sdl));
source_ifindex = sdl->sdl_index;
}
#endif /* IP_RECVIF */
}
#endif /* defined(IP_RECVIF) || defined(IP_PKTINFO) */
#ifdef ENABLE_HTTPS
ProcessSSDPData(s, bufr, n, (struct sockaddr *)&sendername,
http_port, https_port);