ping: Fix alignment errors
This fixes -Wcast-align errors when compiled with WARNS=6. Submitted by: Ján Sučan <sucanjan@gmail.com> MFC after: 2 weeks Sponsored by: Google LLC (Google Summer of Code 2019) Differential Revision: https://reviews.freebsd.org/D21327
This commit is contained in:
asomers
parent
2d3cff4bfc
commit
6a537df465
202
sbin/ping/ping.c
202
sbin/ping/ping.c
@ -91,6 +91,7 @@ __FBSDID("$FreeBSD$");
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#include <errno.h>
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#include <math.h>
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#include <netdb.h>
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#include <stddef.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -217,10 +218,10 @@ static void finish(void) __dead2;
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static void pinger(void);
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static char *pr_addr(struct in_addr);
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static char *pr_ntime(n_time);
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static void pr_icmph(struct icmp *);
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static void pr_icmph(struct icmp *, struct ip *, const u_char *const);
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static void pr_iph(struct ip *);
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static void pr_pack(char *, int, struct sockaddr_in *, struct timespec *);
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static void pr_retip(struct ip *);
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static void pr_pack(char *, ssize_t, struct sockaddr_in *, struct timespec *);
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static void pr_retip(struct ip *, const u_char *);
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static void status(int);
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static void stopit(int);
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static void usage(void) __dead2;
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@ -232,7 +233,6 @@ main(int argc, char *const *argv)
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struct in_addr ifaddr;
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struct timespec last, intvl;
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struct iovec iov;
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struct ip *ip;
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struct msghdr msg;
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struct sigaction si_sa;
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size_t sz;
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@ -687,7 +687,9 @@ main(int argc, char *const *argv)
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#endif /*IPSEC*/
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if (options & F_HDRINCL) {
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ip = (struct ip*)outpackhdr;
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struct ip ip;
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memcpy(&ip, outpackhdr, sizeof(ip));
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if (!(options & (F_TTL | F_MTTL))) {
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mib[0] = CTL_NET;
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mib[1] = PF_INET;
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@ -698,15 +700,16 @@ main(int argc, char *const *argv)
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err(1, "sysctl(net.inet.ip.ttl)");
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}
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setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
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ip->ip_v = IPVERSION;
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ip->ip_hl = sizeof(struct ip) >> 2;
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ip->ip_tos = tos;
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ip->ip_id = 0;
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ip->ip_off = htons(df ? IP_DF : 0);
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ip->ip_ttl = ttl;
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ip->ip_p = IPPROTO_ICMP;
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ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
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ip->ip_dst = to->sin_addr;
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ip.ip_v = IPVERSION;
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ip.ip_hl = sizeof(struct ip) >> 2;
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ip.ip_tos = tos;
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ip.ip_id = 0;
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ip.ip_off = htons(df ? IP_DF : 0);
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ip.ip_ttl = ttl;
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ip.ip_p = IPPROTO_ICMP;
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ip.ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
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ip.ip_dst = to->sin_addr;
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memcpy(outpackhdr, &ip, sizeof(ip));
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}
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/*
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@ -898,7 +901,8 @@ main(int argc, char *const *argv)
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while (!finish_up) {
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struct timespec now, timeout;
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fd_set rfds;
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int cc, n;
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int n;
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ssize_t cc;
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check_status();
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if ((unsigned)srecv >= FD_SETSIZE)
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@ -1016,18 +1020,17 @@ pinger(void)
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{
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struct timespec now;
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struct tv32 tv32;
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struct ip *ip;
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struct icmp *icp;
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struct icmp icp;
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int cc, i;
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u_char *packet;
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packet = outpack;
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icp = (struct icmp *)outpack;
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icp->icmp_type = icmp_type;
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icp->icmp_code = 0;
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icp->icmp_cksum = 0;
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icp->icmp_seq = htons(ntransmitted);
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icp->icmp_id = ident; /* ID */
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memcpy(&icp, outpack, ICMP_MINLEN + phdr_len);
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icp.icmp_type = icmp_type;
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icp.icmp_code = 0;
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icp.icmp_cksum = 0;
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icp.icmp_seq = htons(ntransmitted);
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icp.icmp_id = ident; /* ID */
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CLR(ntransmitted % mx_dup_ck);
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@ -1042,7 +1045,7 @@ pinger(void)
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tv32.tv32_sec = (uint32_t)htonl(now.tv_sec);
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tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec);
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if (options & F_TIME)
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icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
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icp.icmp_otime = htonl((now.tv_sec % (24*60*60))
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* 1000 + now.tv_nsec / 1000000);
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if (timing)
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bcopy((void *)&tv32,
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@ -1050,16 +1053,28 @@ pinger(void)
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sizeof(tv32));
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}
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memcpy(outpack, &icp, ICMP_MINLEN + phdr_len);
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cc = ICMP_MINLEN + phdr_len + datalen;
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/* compute ICMP checksum here */
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icp->icmp_cksum = in_cksum((u_char *)icp, cc);
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icp.icmp_cksum = in_cksum(outpack, cc);
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/* Update icmp_cksum in the raw packet data buffer. */
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memcpy(outpack + offsetof(struct icmp, icmp_cksum), &icp.icmp_cksum,
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sizeof(icp.icmp_cksum));
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if (options & F_HDRINCL) {
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struct ip ip;
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cc += sizeof(struct ip);
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ip = (struct ip *)outpackhdr;
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ip->ip_len = htons(cc);
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ip->ip_sum = in_cksum(outpackhdr, cc);
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ip.ip_len = htons(cc);
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/* Update ip_len in the raw packet data buffer. */
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memcpy(outpackhdr + offsetof(struct ip, ip_len), &ip.ip_len,
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sizeof(ip.ip_len));
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ip.ip_sum = in_cksum(outpackhdr, cc);
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/* Update ip_sum in the raw packet data buffer. */
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memcpy(outpackhdr + offsetof(struct ip, ip_sum), &ip.ip_sum,
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sizeof(ip.ip_sum));
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packet = outpackhdr;
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}
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i = send(ssend, (char *)packet, cc, 0);
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@ -1089,47 +1104,61 @@ pinger(void)
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* program to be run without having intermingled output (or statistics!).
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*/
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static void
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pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv)
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{
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struct in_addr ina;
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u_char *cp, *dp;
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struct icmp *icp;
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struct ip *ip;
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const void *tp;
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u_char *cp, *dp, l;
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struct icmp icp;
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struct ip ip;
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const u_char *icmp_data_raw;
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double triptime;
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int dupflag, hlen, i, j, recv_len;
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uint16_t seq;
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static int old_rrlen;
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static char old_rr[MAX_IPOPTLEN];
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struct ip oip;
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u_char oip_header_len;
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struct icmp oicmp;
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const u_char *oicmp_raw;
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/*
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* Get size of IP header of the received packet. The
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* information is contained in the lower four bits of the
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* first byte.
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*/
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memcpy(&l, buf, sizeof(l));
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hlen = (l & 0x0f) << 2;
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memcpy(&ip, buf, hlen);
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/* Check the IP header */
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ip = (struct ip *)buf;
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hlen = ip->ip_hl << 2;
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recv_len = cc;
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if (cc < hlen + ICMP_MINLEN) {
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if (options & F_VERBOSE)
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warn("packet too short (%d bytes) from %s", cc,
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warn("packet too short (%zd bytes) from %s", cc,
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inet_ntoa(from->sin_addr));
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return;
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}
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#ifndef icmp_data
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icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_ip);
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#else
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icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_data);
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#endif
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/* Now the ICMP part */
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cc -= hlen;
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icp = (struct icmp *)(buf + hlen);
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if (icp->icmp_type == icmp_type_rsp) {
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if (icp->icmp_id != ident)
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memcpy(&icp, buf + hlen, MIN((ssize_t)sizeof(icp), cc));
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if (icp.icmp_type == icmp_type_rsp) {
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if (icp.icmp_id != ident)
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return; /* 'Twas not our ECHO */
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++nreceived;
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triptime = 0.0;
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if (timing) {
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struct timespec tv1;
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struct tv32 tv32;
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#ifndef icmp_data
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tp = &icp->icmp_ip;
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#else
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tp = icp->icmp_data;
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#endif
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tp = (const char *)tp + phdr_len;
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const u_char *tp;
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tp = icmp_data_raw + phdr_len;
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if ((size_t)(cc - ICMP_MINLEN - phdr_len) >=
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sizeof(tv1)) {
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@ -1150,7 +1179,7 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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timing = 0;
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}
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seq = ntohs(icp->icmp_seq);
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seq = ntohs(icp.icmp_seq);
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if (TST(seq % mx_dup_ck)) {
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++nrepeats;
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@ -1172,9 +1201,9 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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if (options & F_FLOOD)
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(void)write(STDOUT_FILENO, &BSPACE, 1);
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else {
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(void)printf("%d bytes from %s: icmp_seq=%u", cc,
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(void)printf("%zd bytes from %s: icmp_seq=%u", cc,
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pr_addr(from->sin_addr), seq);
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(void)printf(" ttl=%d", ip->ip_ttl);
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(void)printf(" ttl=%d", ip.ip_ttl);
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if (timing)
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(void)printf(" time=%.3f ms", triptime);
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if (dupflag)
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@ -1184,12 +1213,12 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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if (options & F_MASK) {
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/* Just prentend this cast isn't ugly */
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(void)printf(" mask=%s",
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inet_ntoa(*(struct in_addr *)&(icp->icmp_mask)));
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inet_ntoa(*(struct in_addr *)&(icp.icmp_mask)));
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}
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if (options & F_TIME) {
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(void)printf(" tso=%s", pr_ntime(icp->icmp_otime));
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(void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
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(void)printf(" tst=%s", pr_ntime(icp->icmp_ttime));
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(void)printf(" tso=%s", pr_ntime(icp.icmp_otime));
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(void)printf(" tsr=%s", pr_ntime(icp.icmp_rtime));
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(void)printf(" tst=%s", pr_ntime(icp.icmp_ttime));
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}
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if (recv_len != send_len) {
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(void)printf(
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@ -1197,7 +1226,8 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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recv_len, send_len);
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}
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/* check the data */
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cp = (u_char*)&icp->icmp_data[phdr_len];
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cp = (u_char*)(buf + hlen + offsetof(struct icmp,
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icmp_data) + phdr_len);
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dp = &outpack[ICMP_MINLEN + phdr_len];
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cc -= ICMP_MINLEN + phdr_len;
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i = 0;
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@ -1212,7 +1242,8 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
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i, *dp, *cp);
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(void)printf("\ncp:");
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cp = (u_char*)&icp->icmp_data[0];
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cp = (u_char*)(buf + hlen +
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offsetof(struct icmp, icmp_data));
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for (i = 0; i < datalen; ++i, ++cp) {
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if ((i % 16) == 8)
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(void)printf("\n\t");
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@ -1240,22 +1271,22 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
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* as root to avoid leaking information not normally
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* available to those not running as root.
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*/
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#ifndef icmp_data
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struct ip *oip = &icp->icmp_ip;
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#else
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struct ip *oip = (struct ip *)icp->icmp_data;
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#endif
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struct icmp *oicmp = (struct icmp *)(oip + 1);
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memcpy(&oip_header_len, icmp_data_raw, sizeof(oip_header_len));
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oip_header_len = (oip_header_len & 0x0f) << 2;
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memcpy(&oip, icmp_data_raw, oip_header_len);
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oicmp_raw = icmp_data_raw + oip_header_len;
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memcpy(&oicmp, oicmp_raw, offsetof(struct icmp, icmp_id) +
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sizeof(oicmp.icmp_id));
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if (((options & F_VERBOSE) && uid == 0) ||
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(!(options & F_QUIET2) &&
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(oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
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(oip->ip_p == IPPROTO_ICMP) &&
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(oicmp->icmp_type == ICMP_ECHO) &&
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(oicmp->icmp_id == ident))) {
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(void)printf("%d bytes from %s: ", cc,
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(oip.ip_dst.s_addr == whereto.sin_addr.s_addr) &&
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(oip.ip_p == IPPROTO_ICMP) &&
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(oicmp.icmp_type == ICMP_ECHO) &&
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(oicmp.icmp_id == ident))) {
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(void)printf("%zd bytes from %s: ", cc,
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pr_addr(from->sin_addr));
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pr_icmph(icp);
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pr_icmph(&icp, &oip, oicmp_raw);
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} else
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return;
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}
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@ -1441,7 +1472,7 @@ static char *ttab[] = {
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* Print a descriptive string about an ICMP header.
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*/
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static void
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pr_icmph(struct icmp *icp)
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pr_icmph(struct icmp *icp, struct ip *oip, const u_char *const oicmp_raw)
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{
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switch(icp->icmp_type) {
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@ -1479,19 +1510,11 @@ pr_icmph(struct icmp *icp)
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break;
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}
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/* Print returned IP header information */
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#ifndef icmp_data
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pr_retip(&icp->icmp_ip);
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#else
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pr_retip((struct ip *)icp->icmp_data);
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#endif
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pr_retip(oip, oicmp_raw);
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break;
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case ICMP_SOURCEQUENCH:
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(void)printf("Source Quench\n");
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#ifndef icmp_data
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pr_retip(&icp->icmp_ip);
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#else
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pr_retip((struct ip *)icp->icmp_data);
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#endif
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pr_retip(oip, oicmp_raw);
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break;
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case ICMP_REDIRECT:
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switch(icp->icmp_code) {
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@ -1512,11 +1535,7 @@ pr_icmph(struct icmp *icp)
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break;
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}
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(void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
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#ifndef icmp_data
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pr_retip(&icp->icmp_ip);
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#else
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pr_retip((struct ip *)icp->icmp_data);
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#endif
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pr_retip(oip, oicmp_raw);
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break;
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case ICMP_ECHO:
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(void)printf("Echo Request\n");
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@ -1535,20 +1554,12 @@ pr_icmph(struct icmp *icp)
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icp->icmp_code);
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break;
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}
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#ifndef icmp_data
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pr_retip(&icp->icmp_ip);
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#else
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pr_retip((struct ip *)icp->icmp_data);
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#endif
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pr_retip(oip, oicmp_raw);
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break;
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case ICMP_PARAMPROB:
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(void)printf("Parameter problem: pointer = 0x%02x\n",
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icp->icmp_hun.ih_pptr);
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#ifndef icmp_data
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pr_retip(&icp->icmp_ip);
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#else
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pr_retip((struct ip *)icp->icmp_data);
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#endif
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pr_retip(oip, oicmp_raw);
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break;
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case ICMP_TSTAMP:
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(void)printf("Timestamp\n");
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@ -1646,14 +1657,9 @@ pr_addr(struct in_addr ina)
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* Dump some info on a returned (via ICMP) IP packet.
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*/
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static void
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pr_retip(struct ip *ip)
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pr_retip(struct ip *ip, const u_char *cp)
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{
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u_char *cp;
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int hlen;
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pr_iph(ip);
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hlen = ip->ip_hl << 2;
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cp = (u_char *)ip + hlen;
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if (ip->ip_p == 6)
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(void)printf("TCP: from port %u, to port %u (decimal)\n",
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