4-08 1,367PVs
别问我为什么要用原始套接字做服务器。说多了都是眼泪。8G内存的机器，最大CPU利用率可以到42左右。最高发包速度可以到200M+。
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#include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdarg.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/errno.h> #include <sys/time.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <net/if.h> #include <net/ethernet.h> #include <netinet/in.h> #include <netinet/ip.h> #include <netinet/if_ether.h> #include <netpacket/packet.h> #include <netdb.h> #include <arpa/inet.h> #include <unistd.h> #include <pthread.h> #include <time.h> #include <errno.h> #include <fcntl.h> #include <dirent.h> #include <resolv.h> #include <signal.h> #include <getopt.h> #define Rec_Port "eth0" #define Send_Port "eth2" #define PHYSICALPORTlength 30 char Physicalport[30]; #define Send_Bufsize 10240 #define Rec_Bufsize 10240 int thread_num; struct argc { int s_f; //socket uint32_t flow_packets; uint32_t flow_size; uint32_t flow_time; uint32_t pid; struct data_header *data; }; struct get_header { uint8_t version_type; uint8_t ttl; uint16_t total_len; uint16_t port_src; uint16_t port_dst; uint16_t minimal_PID_CP; uint8_t PIDs; uint8_t offsets_RES; uint32_t offset; uint32_t length; uint16_t content_len; uint16_t mtu; uint16_t publickey_len; uint32_t pid; }; struct data_header { uint8_t version_type; uint8_t ttl; uint16_t total_len; uint16_t port_src; uint16_t port_dst; uint16_t minimal_pid_p; uint8_t PIDs; uint8_t RES; uint32_t offset; uint32_t length; uint16_t next_header; uint16_t check_sum; uint32_t reserved; uint8_t nid_eid[16]; uint8_t l_eid[20]; uint8_t NID[16]; uint32_t pid; }; static void * send_data_packets(void *argv) { struct argc B; // &B = (struct argc *)argv; memcpy(&B,argv,sizeof(struct argc)); int sockfd = B.s_f; uint8_t sbuf[Send_Bufsize]; memset(sbuf,0,sizeof(sbuf)); int lastpsize = B.flow_size % B.flow_packets; int psize = B.flow_size / B.flow_packets; int duration = B.flow_time / B.flow_packets; int len = 14 + sizeof(struct data_header) + psize; int len2= 14 + sizeof(struct data_header) + lastpsize; int j=0; for(;len>1514 || len2>1514 || psize>1400 || lastpsize>1400;) { j++; psize = B.flow_size / (B.flow_packets+j); lastpsize = B.flow_size % (B.flow_packets + j); len = 14 + sizeof(struct data_header) + psize; len2 = 14 + sizeof(struct data_header) + lastpsize; } if(j!=0) B.flow_packets += j; uint8_t mac[14]={255,255,255,255,255,255,255,255,255,255,255,255,8,0}; uint8_t *sbuf2=sbuf+14+sizeof(struct data_header); memcpy(sbuf,mac,14); memcpy(sbuf+14,B.data,sizeof(struct data_header)); memset(sbuf2,1,psize); int i,pklen; struct sockaddr to; memset(&to,0,sizeof(to)); memcpy(Physicalport,Send_Port,PHYSICALPORTlength); strcpy(to.sa_data,Physicalport); if(duration == 0) { if(B.flow_packets>1) { duration = 1; B.flow_time=1; } } if(B.flow_time==0 && B.flow_packets>10) {printf("B2 %d %d %d\n",B.flow_packets,B.flow_size,B.flow_time);exit(1);} if(lastpsize == 0) { for(i=0;i<B.flow_packets;i++) { pklen = sendto(sockfd,sbuf,len,0,&to,sizeof(to)); if(pklen==-1) { printf("Sendto Error!\n"); printf("B %d %d %d\n",B.flow_packets,B.flow_size,B.flow_time); printf("psize %d lastpsize %d duration %d\n",psize,lastpsize,duration); close(sockfd); exit(1); } if((i!=B.flow_packets-1) && (duration!=0)) usleep(duration); } } else { for(i=0;i<B.flow_packets-1;i++) { pklen = sendto(sockfd,sbuf,len,0,&to,sizeof(to)); if(pklen==-1) { printf("Sendto Error2 pklen=%d len=%d\n",pklen,len); printf("B %d %d %d\n",B.flow_packets,B.flow_size,B.flow_time); printf("psize %d lastpsize %d duration %d\n",psize,lastpsize,duration); close(sockfd); exit(1); } if((i!=B.flow_packets-1)&&(duration!=0)) usleep(duration); } if(pklen=sendto(sockfd,sbuf,len2,0,&to,sizeof(to))==-1) { printf("Sendto error3\n"); printf("B %d %d %d\n",B.flow_packets,B.flow_size,B.flow_time); printf("psize %d lastpsize %d duration %d\n",psize,lastpsize,duration); close(sockfd); exit(1); } } pthread_detach(pthread_self()); thread_num-=1; } void main() { thread_num = 0; struct argc A; int s_s; char rbuf[Rec_Bufsize]; memset(rbuf,0,Rec_Bufsize); pthread_t thread_do; struct data_header dh; dh.version_type=0xa1; dh.ttl=255; dh.total_len=0; dh.port_src=0; dh.port_dst=0; dh.minimal_pid_p=0; dh.PIDs=1; dh.RES=0; dh.offset=0; dh.length=0; dh.next_header=0; dh.check_sum = 0; dh.reserved =0; char nid[16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}; memcpy(dh.nid_eid,nid,16); char sid[20]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,100}; memcpy(dh.l_eid,sid,20); memcpy(dh.NID,nid,16); dh.pid=1; struct sockaddr from; memset(&from,0,sizeof(from)); memcpy(Physicalport,Rec_Port,PHYSICALPORTlength); strcpy(from.sa_data,Physicalport); if((s_s=socket(PF_PACKET,SOCK_PACKET,htons(ETH_P_ALL)))==-1) { printf("socket error!\n"); exit(0); } while(1){ int lenr = recvfrom(s_s,rbuf,sizeof(rbuf),0,NULL,NULL); if(lenr<0) { printf("recv error!\n"); close(s_s); exit(1); } while(1){ int lenr = recvfrom(s_s,rbuf,sizeof(rbuf),0,NULL,NULL); if(lenr<0) { printf("recv error!\n"); close(s_s); exit(1); } struct get_header *get_h = (struct get_header *)(rbuf+14+20); if(get_h->version_type==0xa0) { A.s_f=s_s; A.flow_packets=get_h->cc_flow_packets; A.flow_size=get_h->cc_flow_size; A.flow_time=get_h->cc_flow_time; A.pid = get_h->pid; // printf("%d %d %d\n",A.flow_packets,A.flow_size,A.flow_time); if((get_h->cc_flow_time==0) && (get_h->cc_flow_packets>10)) {printf("data error\n");exit(1);} A.data = &dh; int err = pthread_create(&thread_do,NULL,send_data_packets,(void *)&A); if(err !=0) { printf("create thread udp failed err=%d/n",err); exit(1); } thread_num+=1; } else continue; printf("thread_number %d\n",thread_num); } } |
