> I think u are doing something wrong in the > sk_buff filling. I dont know the problem > precisely. well i am doing the sk_buff similar to the filling that is done in ipconfig.c. check the function i am talking about here: http://lxr.linux.no/source/net/ipv4/ipconfig.c?v=2.6.1#L674 i did parallel to that, some code that should work with tcp packets. here is the sample code, that should send packets to the network. [code] int function (void) { struct packet_tcp{ struct iphdr iph; struct tcphdr tcph; }; struct pseudo_tcp{ unsigned long s_addr; unsigned long d_addr; char zero; unsigned char protocol; unsigned short length; }; struct pseudo_tcp *pseudo; struct in_addr saddr, daddr; struct sk_buff *skb; struct net_device *list; int hh_len; struct iphdr *h; struct tcphdr *th; struct packet_tcp *packetbuffer = (struct packet_tcp *)kmalloc(sizeof(struct packet_tcp), GFP_KERNEL); saddr.s_addr = inet_addr("192.168.0.3"); daddr.s_addr = inet_addr("192.168.0.4"); pseudo = (struct pseudo_tcp *)(packetbuffer + sizeof(struct iphdr) - sizeof(struct pseudo_tcp)); pseudo->protocol = IPPROTO_TCP; pseudo->length = htons(sizeof(struct tcphdr)); pseudo->s_addr = saddr.s_addr; pseudo->d_addr = daddr.s_addr; pseudo->zero = 0; list = (struct net_device *)kmalloc(sizeof(struct net_device), GFP_KERNEL); for(list=dev_base;list->next != NULL;list = list->next){ if(strcmp(list->name, devname) == 0){ printk("<1>device '%s' found\n", devname); break; } } hh_len = LL_RESERVED_SPACE(list); /* allocate packet */ skb = alloc_skb(sizeof(struct iphdr) + sizeof(struct tcphdr) + hh_len + 15, GFP_KERNEL); if(!skb) return -EINVAL; skb_reserve(skb, hh_len); packetbuffer = (struct packet_tcp *)skb_put(skb, sizeof(struct packet_tcp)); memset(packetbuffer, 0, sizeof(struct packet_tcp)); /* constructing ip hdr */ skb->nh.iph = h = &packetbuffer->iph; h->version = 4; h->ihl = 5; h->tos = 0x0; h->tot_len = htons(sizeof(struct packet_tcp)); h->frag_off = htons(IP_DF); /* 0x4000, don't fragment packet */ h->ttl = 64; h->protocol = IPPROTO_TCP; h->daddr = daddr.s_addr; h->saddr = saddr.s_addr; h->check = ip_fast_csum((unsigned char *)h, h->ihl); /* now tcp header */ skb->h.th = th = &packetbuffer->tcph; th->source = htons(12345); th->dest = htons(22); th->seq = 0xfee1; th->ack_seq = htonl(0xdead); th->doff = 5; th->fin = 1; th->syn = 0; th->rst = 0; th->psh = 0; th->ack = 0; th->urg = 0; th->window = htons(0xeeff); th->urg_ptr = 0; th->check = csum((unsigned short *)pseudo, sizeof(struct tcphdr) + sizeof(struct pseudo_tcp)); skb->dev = list; skb->protocol = htons(ETH_P_IP); dev_queue_xmit(skb); return -EINVAL; } [/code] thanks for the effort and best regards threadhead ______________________________________________________________________________ Extra-Konto: 2,50 %* Zinsen p. a. ab dem ersten Euro! Nur hier mit 25 Euro-Tankgutschein & ExtraPrämie! https://extrakonto.web.de/?mc=021110 -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
