From b88df1e893c455731c7915f72a3b97b078ab04e2 Mon Sep 17 00:00:00 2001 From: "Pedro F. Giffuni" Date: Wed, 16 Oct 2024 13:35:44 -0500 Subject: [PATCH] Reapply "sbin/ping: allow normal users to specify larger packets" The ping tests were originally broken by an unrelated isue that is now fixed ( 2926c2594249f64fecbbdcb0b0b9a3591931ab04 ). THanks to kp@ for fixing the test and Jose Luis Duran for pinting it out. This reverts commit 7bc0cb91a2dfc7e23d96efd0fb7866ee2a23ba88. --- sbin/ping/ping.8 | 3 +-- sbin/ping/ping.c | 11 +++++------ 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/sbin/ping/ping.8 b/sbin/ping/ping.8 index 0eaec196e1e..951049d0f25 100644 --- a/sbin/ping/ping.8 +++ b/sbin/ping/ping.8 @@ -25,7 +25,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd September 15, 2023 +.Dd October 15, 2024 .Dt PING 8 .Os .Sh NAME @@ -312,7 +312,6 @@ with the 8 bytes of ICMP header data. .Pp -For IPv4, only the super-user may specify values more than default. This option cannot be used with ping sweeps. .Pp For IPv6, you may need to specify diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c index d9d544bc75c..e6b1247af49 100644 --- a/sbin/ping/ping.c +++ b/sbin/ping/ping.c @@ -96,8 +96,8 @@ #define DEFDATALEN 56 /* default data length */ #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ /* runs out of buffer space */ -#define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) -#define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) +#define MAXIPLEN ((int)sizeof(struct ip) + MAX_IPOPTLEN) +#define MAXPAYLOAD (IP_MAXPACKET - MAXIPLEN - ICMP_MINLEN) #define MAXWAIT 10000 /* max ms to wait for response */ #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ #define MAXTOS 255 @@ -458,11 +458,10 @@ ping(int argc, char *const *argv) errx(EX_USAGE, "invalid packet size: `%s'", optarg); datalen = (int)ltmp; - if (uid != 0 && datalen > DEFDATALEN) { - errno = EPERM; - err(EX_NOPERM, + if (datalen > MAXPAYLOAD) { + errx(EX_USAGE, "packet size too large: %d > %u", - datalen, DEFDATALEN); + datalen, MAXPAYLOAD); } break; case 'T': /* multicast TTL */