Date: Thu, 23 Mar 2023 13:48:52 -0300 From: =?utf-8?B?Sm9zw6kgTHVpcyBEdXLDoW4=?= <jlduran@gmail.com> To: Cy Schubert <Cy.Schubert@cschubert.com> Cc: Mark Johnston <markj@FreeBSD.org>, "src-committers@freebsd.org" <src-committers@FreeBSD.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@FreeBSD.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@FreeBSD.org> Subject: Re: git: 20b41303140e - main - ping: Print the IP options of the original packet Message-ID: <6AEF84FA-8055-4AD1-83F1-D89386C33092@gmail.com> In-Reply-To: <20230323090520.30554030@slippy> References: <202303191633.32JGXPov003163@gitrepo.freebsd.org> <20230323090520.30554030@slippy>
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> On Mar 23, 2023, at 1:05 PM, Cy Schubert <Cy.Schubert@cschubert.com> = wrote: >=20 > On Sun, 19 Mar 2023 16:33:25 GMT > Mark Johnston <markj@FreeBSD.org> wrote: >=20 >> The branch main has been updated by markj: >>=20 >> URL: = https://cgit.FreeBSD.org/src/commit/?id=3D20b41303140eee4dfb896558fb83600c= 5f013d39 >>=20 >> commit 20b41303140eee4dfb896558fb83600c5f013d39 >> Author: Jose Luis Duran <jlduran@gmail.com> >> AuthorDate: 2023-02-09 15:47:53 +0000 >> Commit: Mark Johnston <markj@FreeBSD.org> >> CommitDate: 2023-03-19 16:23:06 +0000 >>=20 >> ping: Print the IP options of the original packet >>=20 >> When an ICMP packet contains an IP packet in its payload, and that >> original IP packet contains options, these options were not = displayed >> accordingly in pr_iph(). >>=20 >> pr_iph() is a function that prints the original "quoted packet" IP >> header, with only an IP struct as an argument. The IP struct does = not >> contain IP options, and it is not guaranteed that the options will = be >> contiguous in memory to the IP struct after >> d9cacf605e2ac0f704e1ce76357cbfbe6cb63d52. >>=20 >> Pass the raw ICMP data along with the IP struct, in order to print = the >> options, if any. >>=20 >> Reviewed by: markj >> MFC after: 1 week >> Differential Revision: https://reviews.freebsd.org/D38469 >> --- >> sbin/ping/ping.c | 19 ++++++++++--------- >> sbin/ping/tests/ping_test.sh | 2 +- >> sbin/ping/tests/test_ping.py | 1 - >> 3 files changed, 11 insertions(+), 11 deletions(-) >>=20 >> diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c >> index fe319bfb70a5..b1721ad72a5c 100644 >> --- a/sbin/ping/ping.c >> +++ b/sbin/ping/ping.c >> @@ -225,7 +225,7 @@ static void pinger(void); >> static char *pr_addr(struct in_addr); >> static char *pr_ntime(n_time); >> static void pr_icmph(struct icmp *, struct ip *, const u_char = *const); >> -static void pr_iph(struct ip *); >> +static void pr_iph(struct ip *, const u_char *); >> static void pr_pack(char *, ssize_t, struct sockaddr_in *, struct = timespec *); >> static void pr_retip(struct ip *, const u_char *); >> static void status(int); >> @@ -1157,7 +1157,6 @@ pr_pack(char *buf, ssize_t cc, struct = sockaddr_in *from, struct timespec *tv) >> struct ip oip; >> u_char oip_header_len; >> struct icmp oicmp; >> - const u_char *oicmp_raw; >>=20 >> /* >> * Get size of IP header of the received packet. >> @@ -1355,8 +1354,6 @@ pr_pack(char *buf, ssize_t cc, struct = sockaddr_in *from, struct timespec *tv) >> } >>=20 >> memcpy(&oip, icmp_data_raw, sizeof(struct ip)); >> - oicmp_raw =3D icmp_data_raw + oip_header_len; >> - memcpy(&oicmp, oicmp_raw, sizeof(struct icmp)); >=20 > Coverity is complaining about uninitialized oicmp due to the deletion > of the above two lines. Right. That is strange it happened, but I=E2=80=99ll submit a fix. Thank = you! >=20 >>=20 >> if (((options & F_VERBOSE) && uid =3D=3D 0) || >> (!(options & F_QUIET2) && >> @@ -1366,7 +1363,7 @@ pr_pack(char *buf, ssize_t cc, struct = sockaddr_in *from, struct timespec *tv) >> (oicmp.icmp_id =3D=3D ident))) { >> (void)printf("%zd bytes from %s: ", cc, >> pr_addr(from->sin_addr)); >> - pr_icmph(&icp, &oip, oicmp_raw); >> + pr_icmph(&icp, &oip, icmp_data_raw); >> } else >> return; >> } >> @@ -1663,14 +1660,13 @@ pr_icmph(struct icmp *icp, struct ip *oip, = const u_char *const oicmp_raw) >> * Print an IP header with options. >> */ >> static void >> -pr_iph(struct ip *ip) >> +pr_iph(struct ip *ip, const u_char *cp) >> { >> struct in_addr ina; >> - u_char *cp; >> int hlen; >>=20 >> hlen =3D ip->ip_hl << 2; >> - cp =3D (u_char *)ip + sizeof(struct ip); /* point = to options */ >> + cp =3D cp + sizeof(struct ip); /* point to options */ >>=20 >> (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src = Dst\n"); >> (void)printf(" %1x %1x %02x %04x %04x", >> @@ -1723,7 +1719,12 @@ pr_addr(struct in_addr ina) >> static void >> pr_retip(struct ip *ip, const u_char *cp) >> { >> - pr_iph(ip); >> + int8_t hlen; >> + >> + pr_iph(ip, cp); >> + >> + hlen =3D ip->ip_hl << 2; >> + cp =3D cp + hlen; >>=20 >> if (ip->ip_p =3D=3D 6) >> (void)printf("TCP: from port %u, to port %u = (decimal)\n", >> diff --git a/sbin/ping/tests/ping_test.sh = b/sbin/ping/tests/ping_test.sh >> index 9f821ed96360..53383f2fb7bc 100644 >> --- a/sbin/ping/tests/ping_test.sh >> +++ b/sbin/ping/tests/ping_test.sh >> @@ -178,7 +178,7 @@ inject_pip_head() >> } >> inject_pip_body() >> { >> - atf_check -s exit:2 -o match:"Destination Host Unreachable" -o = not-match:"01010101" python3 $(atf_get_srcdir)/injection.py pip >> + atf_check -s exit:2 -o match:"Destination Host Unreachable" -o = match:"(01){40}" python3 $(atf_get_srcdir)/injection.py pip >> } >> inject_pip_cleanup() >> { >> diff --git a/sbin/ping/tests/test_ping.py = b/sbin/ping/tests/test_ping.py >> index a9b760ff7aca..79fd332f1c18 100644 >> --- a/sbin/ping/tests/test_ping.py >> +++ b/sbin/ping/tests/test_ping.py >> @@ -893,7 +893,6 @@ Vr HL TOS Len ID Flg off TTL Pro cks = Src Dst >> "stderr": "", >> "redacted": False, >> }, >> - marks=3Dpytest.mark.skip("XXX currently failing"), >> id=3D"_3_1_opts_NOP_40", >> ), >> pytest.param( >>=20 >=20 >=20 >=20 > --=20 > Cheers, > Cy Schubert <Cy.Schubert@cschubert.com> > FreeBSD UNIX: <cy@FreeBSD.org> Web: https://FreeBSD.org > NTP: <cy@nwtime.org> Web: https://nwtime.org >=20 > e^(i*pi)+1=3D0
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