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author | Marc-André Lureau <marcandre.lureau@gmail.com> | 2020-03-17 09:49:34 +0000 |
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committer | Marc-André Lureau <marcandre.lureau@gmail.com> | 2020-03-17 09:49:34 +0000 |
commit | fb73a40e11664437d3a90bb8d8aa3457ae773813 (patch) | |
tree | 37e0e93129823411a1e7e90d07055a695e469442 | |
parent | 464acee1de34d2a05d339c7205c4a8189d6b4c2b (diff) | |
parent | f9c56fed8ef0bae4ac81a7335c5d262e1e1f4c21 (diff) | |
download | slirp-fb73a40e11664437d3a90bb8d8aa3457ae773813.zip slirp-fb73a40e11664437d3a90bb8d8aa3457ae773813.tar.gz slirp-fb73a40e11664437d3a90bb8d8aa3457ae773813.tar.bz2 |
Merge branch 'translate-fix' into 'master'
Translate fixes
See merge request slirp/libslirp!32
-rw-r--r-- | src/socket.c | 93 |
1 files changed, 46 insertions, 47 deletions
diff --git a/src/socket.c b/src/socket.c index 37838db..6ad9c30 100644 --- a/src/socket.c +++ b/src/socket.c @@ -819,66 +819,65 @@ void sofwdrain(struct socket *so) sofcantsendmore(so); } +static bool sotranslate_out4(Slirp *s, struct socket *so, struct sockaddr_in *sin) +{ + if (so->so_faddr.s_addr == s->vnameserver_addr.s_addr) { + return get_dns_addr(&sin->sin_addr) >= 0; + } + + if (so->so_faddr.s_addr == s->vhost_addr.s_addr || + so->so_faddr.s_addr == 0xffffffff) { + if (s->disable_host_loopback) { + return false; + } + + sin->sin_addr = loopback_addr; + } + + return true; +} + +static bool sotranslate_out6(Slirp *s, struct socket *so, struct sockaddr_in6 *sin) +{ + if (in6_equal(&so->so_faddr6, &s->vnameserver_addr6)) { + return get_dns6_addr(&sin->sin6_addr, &sin->sin6_scope_id) >= 0; + } + + if (in6_equal_net(&so->so_faddr6, &s->vprefix_addr6, s->vprefix_len) || + in6_equal(&so->so_faddr6, &(struct in6_addr)ALLNODES_MULTICAST)) { + if (s->disable_host_loopback) { + return false; + } + + sin->sin6_addr = in6addr_loopback; + } + + return true; +} + + /* * Translate addr in host addr when it is a virtual address */ int sotranslate_out(struct socket *so, struct sockaddr_storage *addr) { - int rc = 0; - Slirp *slirp = so->slirp; - struct sockaddr_in *sin = (struct sockaddr_in *)addr; - struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; + bool ok = true; switch (addr->ss_family) { case AF_INET: - if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == - slirp->vnetwork_addr.s_addr) { - /* It's an alias */ - if (so->so_faddr.s_addr == slirp->vnameserver_addr.s_addr) { - if (get_dns_addr(&sin->sin_addr) >= 0) { - goto ret; - } - } - if (slirp->disable_host_loopback) { - rc = -1; - errno = EPERM; - goto ret; - } else { - sin->sin_addr = loopback_addr; - } - } else if (!slirp->disable_host_loopback && so->so_faddr.s_addr == 0xffffffff) { - /* Receive broadcast as well */ - sin->sin_addr = loopback_addr; - } + ok = sotranslate_out4(so->slirp, so, (struct sockaddr_in *)addr); break; case AF_INET6: - if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6, - slirp->vprefix_len)) { - if (in6_equal(&so->so_faddr6, &slirp->vnameserver_addr6)) { - uint32_t scope_id; - if (get_dns6_addr(&sin6->sin6_addr, &scope_id) >= 0) { - sin6->sin6_scope_id = scope_id; - goto ret; - } - } - if (slirp->disable_host_loopback) { - rc = -1; - errno = EPERM; - goto ret; - } else { - sin6->sin6_addr = in6addr_loopback; - } - } else if (!slirp->disable_host_loopback - && in6_equal(&so->so_faddr6, &(struct in6_addr) ALLNODES_MULTICAST)) { - sin6->sin6_addr = in6addr_loopback; - } + ok = sotranslate_out6(so->slirp, so, (struct sockaddr_in6 *)addr); break; + } - default: - break; + if (!ok) { + errno = EPERM; + return -1; } -ret: - return rc; + + return 0; } void sotranslate_in(struct socket *so, struct sockaddr_storage *addr) |