Module: wine Branch: master Commit: 881577deaf508f48cbcedc64739073c9a245f472 URL: https://source.winehq.org/git/wine.git/?a=commit;h=881577deaf508f48cbcedc647...
Author: Huw Davies huw@codeweavers.com Date: Tue Oct 5 07:37:52 2021 +0100
nsiproxy: Add support for parsing other icmp packets.
Signed-off-by: Huw Davies huw@codeweavers.com Signed-off-by: Alexandre Julliard julliard@winehq.org
---
dlls/nsiproxy.sys/icmp_echo.c | 63 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 62 insertions(+), 1 deletion(-)
diff --git a/dlls/nsiproxy.sys/icmp_echo.c b/dlls/nsiproxy.sys/icmp_echo.c index abcccdb4c73..cef5c04a6c7 100644 --- a/dlls/nsiproxy.sys/icmp_echo.c +++ b/dlls/nsiproxy.sys/icmp_echo.c @@ -297,6 +297,30 @@ static BOOL ipv4_linux_ping_parse_ip_hdr( struct msghdr *msg, int recvd, static int ipv4_parse_icmp_hdr_( struct icmp_data *data, struct icmp_hdr *icmp, int icmp_size, struct nsiproxy_icmp_echo_reply *reply, int ping_socket ) { + static const IP_STATUS unreach_codes[] = + { + IP_DEST_NET_UNREACHABLE, /* ICMP_UNREACH_NET */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_HOST */ + IP_DEST_PROT_UNREACHABLE, /* ICMP_UNREACH_PROTOCOL */ + IP_DEST_PORT_UNREACHABLE, /* ICMP_UNREACH_PORT */ + IP_PACKET_TOO_BIG, /* ICMP_UNREACH_NEEDFRAG */ + IP_BAD_ROUTE, /* ICMP_UNREACH_SRCFAIL */ + IP_DEST_NET_UNREACHABLE, /* ICMP_UNREACH_NET_UNKNOWN */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_HOST_UNKNOWN */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_ISOLATED */ + IP_DEST_NET_UNREACHABLE, /* ICMP_UNREACH_NET_PROHIB */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_HOST_PROHIB */ + IP_DEST_NET_UNREACHABLE, /* ICMP_UNREACH_TOSNET */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_TOSHOST */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_FILTER_PROHIB */ + IP_DEST_HOST_UNREACHABLE, /* ICMP_UNREACH_HOST_PRECEDENCE */ + IP_DEST_HOST_UNREACHABLE /* ICMP_UNREACH_PRECEDENCE_CUTOFF */ + }; + const struct ip_hdr *orig_ip_hdr; + const struct icmp_hdr *orig_icmp_hdr; + int orig_ip_hdr_len; + IP_STATUS status; + switch (icmp->type) { case ICMP4_ECHO_REPLY: @@ -306,11 +330,48 @@ static int ipv4_parse_icmp_hdr_( struct icmp_data *data, struct icmp_hdr *icmp, reply->status = IP_SUCCESS; return icmp_size - sizeof(*icmp);
- /* FIXME: handle other icmp messages */ + case ICMP4_DST_UNREACH: + if (icmp->code < ARRAY_SIZE(unreach_codes)) + status = unreach_codes[icmp->code]; + else + status = IP_DEST_HOST_UNREACHABLE; + break; + + case ICMP4_TIME_EXCEEDED: + if (icmp->code == 1) /* ICMP_TIMXCEED_REASS */ + status = IP_TTL_EXPIRED_REASSEM; + else + status = IP_TTL_EXPIRED_TRANSIT; + break; + + case ICMP4_PARAM_PROB: + status = IP_PARAM_PROBLEM; + break; + + case ICMP4_SOURCE_QUENCH: + status = IP_SOURCE_QUENCH; + break;
default: return -1; } + + /* Check that the appended packet is really ours - + * all handled icmp replies have an 8-byte header + * followed by the original ip hdr. */ + if (icmp_size < sizeof(*icmp) + sizeof(*orig_ip_hdr)) return -1; + orig_ip_hdr = (struct ip_hdr *)(icmp + 1); + if (orig_ip_hdr->v_hl >> 4 != 4 || orig_ip_hdr->protocol != IPPROTO_ICMP) return -1; + orig_ip_hdr_len = (orig_ip_hdr->v_hl & 0xf) << 2; + if (icmp_size < sizeof(*icmp) + orig_ip_hdr_len + sizeof(*orig_icmp_hdr)) return -1; + orig_icmp_hdr = (const struct icmp_hdr *)((const BYTE *)orig_ip_hdr + orig_ip_hdr_len); + if (orig_icmp_hdr->type != ICMP4_ECHO_REQUEST || + orig_icmp_hdr->code != 0 || + (!ping_socket && orig_icmp_hdr->un.echo.id != data->id) || + orig_icmp_hdr->un.echo.sequence != data->seq) return -1; + + reply->status = status; + return 0; }
static int ipv4_parse_icmp_hdr( struct icmp_data *data, struct icmp_hdr *icmp, int icmp_size,