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author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2020-03-16 19:20:33 +0100 |
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committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2020-03-16 19:22:35 +0100 |
commit | de0d10458d5a509c592d5dd71a5b1b45f3215d39 (patch) | |
tree | 0143343d6227c12feff98120bb92f48ba2f14043 /src/socket.c | |
parent | 4571ca2a295629830bb3ffdc0b52d66084d436fe (diff) | |
download | slirp-de0d10458d5a509c592d5dd71a5b1b45f3215d39.zip slirp-de0d10458d5a509c592d5dd71a5b1b45f3215d39.tar.gz slirp-de0d10458d5a509c592d5dd71a5b1b45f3215d39.tar.bz2 |
socket: factor out sotranslate ipv4/ipv6 handling
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Diffstat (limited to 'src/socket.c')
-rw-r--r-- | src/socket.c | 96 |
1 files changed, 54 insertions, 42 deletions
diff --git a/src/socket.c b/src/socket.c index a01b46f..b06f2a1 100644 --- a/src/socket.c +++ b/src/socket.c @@ -819,60 +819,72 @@ 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->vnetwork_mask.s_addr) == + s->vnetwork_addr.s_addr) { + if (so->so_faddr.s_addr == s->vnameserver_addr.s_addr) { + if (get_dns_addr(&sin->sin_addr) >= 0) { + return true; + } + } + if (s->disable_host_loopback) { + return false; + } + + sin->sin_addr = loopback_addr; + } else if (!s->disable_host_loopback && so->so_faddr.s_addr == 0xffffffff) { + /* Receive broadcast as well */ + sin->sin_addr = loopback_addr; + } + + return true; +} + +static bool sotranslate_out6(Slirp *s, struct socket *so, struct sockaddr_in6 *sin) +{ + if (in6_equal_net(&so->so_faddr6, &s->vprefix_addr6, s->vprefix_len)) { + if (in6_equal(&so->so_faddr6, &s->vnameserver_addr6)) { + uint32_t scope_id; + if (get_dns6_addr(&sin->sin6_addr, &scope_id) >= 0) { + sin->sin6_scope_id = scope_id; + return true; + } + } + if (s->disable_host_loopback) { + return false; + } + + sin->sin6_addr = in6addr_loopback; + } else if (!s->disable_host_loopback && + in6_equal(&so->so_faddr6, + &(struct in6_addr)ALLNODES_MULTICAST)) { + 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) { - 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) { - return 0; - } - } - if (slirp->disable_host_loopback) { - errno = EPERM; - return -1; - } 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; - return 0; - } - } - if (slirp->disable_host_loopback) { - errno = EPERM; - return -1; - } 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; } return 0; |