📄 checkudpsum.c
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#include "unproute.h"#include <netinet/udp.h>#include <netinet/ip_var.h>#include <netinet/udp_var.h> /* for UDPCTL_xxx constants */intmain(int argc, char **argv){ int mib[4], val; size_t len; mib[0] = CTL_NET; mib[1] = AF_INET; mib[2] = IPPROTO_UDP; mib[3] = UDPCTL_CHECKSUM; len = sizeof(val); Sysctl(mib, 4, &val, &len, NULL, 0); printf("udp checksum flag: %d\n", val); exit(0);}
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