StackOverflow2013

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plurals

PO
primarykey
Id
15083574
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-02-26T07:24:15.950
FavoriteCount
0
LastActivityDate
2013-02-26T07:53:14.800
LastEditDate
2013-02-26T07:53:14.800
LastEditorUserId
1976516
OwnerUserId
1976516
ParentId
9262467
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
you have not written the whole code. there may be area which you would be missing something. this code will help you. <pre><code>#include<stdio.h> #include<string.h> #include<sys/socket.h> #include<stdlib.h> #include<errno.h> #include<netinet/tcp.h> #include<netinet/ip.h> struct pseudo_header { u_int32_t source_address; u_int32_t dest_address; u_int8_t placeholder; u_int8_t protocol; u_int16_t tcp_length; }; unsigned short csum(unsigned short *ptr,int nbytes) { register long sum; unsigned short oddbyte; register short answer; sum=0; while(nbytes>1) { sum+=*ptr++; nbytes-=2; } if(nbytes==1) { oddbyte=0; *((u_char*)&oddbyte)=*(u_char*)ptr; sum+=oddbyte; } sum = (sum>>16)+(sum & 0xffff); sum = sum + (sum>>16); answer=(short)~sum; return(answer); } int main (void) { int s = socket (AF_INET, SOCK_RAW, IPPROTO_TCP); if(s == -1) { perror("Failed to create socket"); exit(1); } char datagram[4096] , source_ip[32] , *data , *pseudogram; char buffer[4096]; memset (datagram, 0, 4096); struct iphdr *iph = (struct iphdr *) datagram; struct tcphdr *tcph = (struct tcphdr *) (datagram + sizeof (struct iphdr)); struct sockaddr_in sin; struct pseudo_header psh; data = datagram + sizeof(struct iphdr) + sizeof(struct tcphdr); strcpy(data , "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); strcpy(source_ip , "127.0.0.1"); sin.sin_family = AF_INET; sin.sin_port = htons(55559); sin.sin_addr.s_addr = inet_addr ("127.0.0.1"); iph->ihl = 5; iph->version = 4; iph->tos = 0; iph->tot_len = sizeof (struct iphdr) + sizeof (struct tcphdr) + strlen(data); iph->id = htonl (54351); iph->frag_off = 0; iph->ttl = 255; iph->protocol = IPPROTO_TCP; iph->check = 0; iph->saddr = inet_addr ( source_ip ); iph->daddr = sin.sin_addr.s_addr; iph->check = csum ((unsigned short *) datagram, iph->tot_len); tcph->source = htons (55554); tcph->dest = sin.sin_port; tcph->seq = htonl(4362); tcph->ack_seq = htonl(0); tcph->doff = 5; tcph->fin=0; tcph->syn=1; tcph->rst=0; tcph->psh=0; tcph->ack=0; tcph->urg=0; tcph->window = 1; tcph->check = 0; tcph->urg_ptr = 0; psh.source_address = inet_addr( source_ip ); psh.dest_address = sin.sin_addr.s_addr; psh.placeholder = 0; psh.protocol = IPPROTO_TCP; psh.tcp_length = htons(sizeof(struct tcphdr) + strlen(data) ); int psize = sizeof(struct pseudo_header) + sizeof(struct tcphdr) + strlen(data); pseudogram = malloc(psize); memcpy(pseudogram , (char*) &psh , sizeof (struct pseudo_header)); memcpy(pseudogram + sizeof(struct pseudo_header) , tcph , sizeof(struct tcphdr) + strlen(data)); tcph->check = csum( (unsigned short*) pseudogram , psize); int one = 1; const int *val = &one; if (setsockopt (s, IPPROTO_IP, IP_HDRINCL, val, sizeof (one)) < 0) { perror("Error setting IP_HDRINCL"); exit(0); } sendto (s, datagram, iph->tot_len , 0, (struct sockaddr *) &sin, sizeof (sin)); return 0; </code></pre> }
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. PORetrieve ack after syn
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USShubendra
UserOwnerUserId
1. USShubendra
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. This table or related slice is empty.

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