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148 lines
4.3 KiB
148 lines
4.3 KiB
#include "tests.h"
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#include <stdio.h>
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#include <stddef.h>
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#include <sys/socket.h>
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#include <linux/if_packet.h>
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#include "print_fields.h"
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static const char *errstr;
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struct tp_stats {
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unsigned int tp_packets, tp_drops, tp_freeze_q_cnt;
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};
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static long
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get_tpacket_stats(void *optval, socklen_t *len)
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{
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struct tp_stats *tpstats = optval;
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socklen_t optlen = *len;
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long rc = getsockopt(-1, SOL_PACKET, PACKET_STATISTICS, tpstats, len);
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errstr = sprintrc(rc);
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#ifdef INJECT_RETVAL
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if (rc != INJECT_RETVAL)
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error_msg_and_fail("Got a return value of %ld != %d",
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rc, INJECT_RETVAL);
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static char inj_errstr[4096];
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snprintf(inj_errstr, sizeof(inj_errstr), "%s (INJECTED)", errstr);
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errstr = inj_errstr;
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#endif
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printf("getsockopt(-1, SOL_PACKET, PACKET_STATISTICS");
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if (rc < 0 || optlen <= 0) {
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printf(", %p", tpstats);
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} else if (optlen < sizeof(tpstats->tp_packets)) {
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printf(", {tp_packets=");
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print_quoted_hex(tpstats, optlen);
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printf("}");
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} else {
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PRINT_FIELD_U(", {", *tpstats, tp_packets);
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if (optlen > offsetof(struct tp_stats, tp_drops)) {
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optlen -= offsetof(struct tp_stats, tp_drops);
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if (optlen < sizeof(tpstats->tp_drops)) {
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printf(", tp_drops=");
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print_quoted_hex(tpstats, optlen);
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} else {
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PRINT_FIELD_U(", ", *tpstats, tp_drops);
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if (optlen > offsetof(struct tp_stats, tp_freeze_q_cnt) -
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offsetof(struct tp_stats, tp_drops)) {
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optlen -= offsetof(struct tp_stats, tp_freeze_q_cnt) -
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offsetof(struct tp_stats, tp_drops);
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if (optlen < sizeof(tpstats->tp_freeze_q_cnt)) {
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printf(", tp_freeze_q_cnt=");
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print_quoted_hex(tpstats, optlen);
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} else {
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PRINT_FIELD_U(", ", *tpstats, tp_freeze_q_cnt);
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}
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}
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}
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}
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printf("}");
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}
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printf(", [%d]) = %s\n", *len, errstr);
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return rc;
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}
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int
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main(void)
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{
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TAIL_ALLOC_OBJECT_CONST_PTR(struct tp_stats, tp_stats);
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TAIL_ALLOC_OBJECT_CONST_PTR(socklen_t, len);
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/* offset of (truncated) struct tp_stats.tp_packets */
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const unsigned int offset_tp_packets = offsetofend(struct tp_stats, tp_packets);
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const unsigned int tp_packets_truncated = offset_tp_packets - 1;
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/* offset of (truncated) struct tp_stats.tp_drops */
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const unsigned int offset_tp_drops = offsetofend(struct tp_stats, tp_drops);
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const unsigned int tp_drops_truncated = offset_tp_drops - 1;
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/* offset of (truncated) struct tp_stats.tp_freeze_q_cnt */
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const unsigned int offset_tp_freeze_q_cnt = offsetofend(struct tp_stats, tp_freeze_q_cnt);
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const unsigned int tp_freeze_q_cnt_truncated = offset_tp_freeze_q_cnt - 1;
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*len = sizeof(*tp_stats);
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/* classic getsockopt */
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unsigned int optlen = *len;
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get_tpacket_stats(tp_stats, &optlen);
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/* getsockopt with zero optlen */
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optlen = 0;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen less than offsetofend(struct tp_stats.tp_packets):
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* the part of struct tp_stats.tp_packets is printed in hex.
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*/
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optlen = tp_packets_truncated;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen equals to offsetofend(struct tp_stats.tp_packets):
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* struct tp_stats.tp_drops and struct tp_stats.offset_tp_freeze_q_cnt
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* are not printed.
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*/
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optlen = offset_tp_packets;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen greater than offsetofend(struct tp_stats.tp_packets)
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* but less than offsetofend(struct tp_stats, tp_drops):
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* the part of struct tp_stats.tp_drops is printed in hex.
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*/
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optlen = tp_drops_truncated;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen equals to offsetofend(struct tp_stats.tp_drops):
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* struct tp_stats.tp_freeze_q_cnt is not printed.
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*/
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optlen = offset_tp_drops;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen greater than offsetofend(struct tp_stats.tp_drops)
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* but less than offsetofend(struct tp_stats, tp_freeze_q_cnt):
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* the part of struct tp_stats.tp_freeze_q_cnt is printed in hex.
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*/
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optlen = tp_freeze_q_cnt_truncated;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen equals to offsetofend(struct tp_stats.tp_freeze_q_cnt):
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*/
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optlen = offset_tp_freeze_q_cnt;
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get_tpacket_stats(tp_stats, &optlen);
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/*
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* getsockopt with optlen greater than sizeof(struct tp_stats)
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*/
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optlen = offset_tp_freeze_q_cnt + 1;
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get_tpacket_stats(tp_stats, &optlen);
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puts("+++ exited with 0 +++");
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return 0;
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}
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