projects / thirdparty / hostap.git / blame
| Commit | Line | Data |
|---|---|---|
| a149fcc7 JM |
1 | /* |
| 2 | * PCAP capture file reader | |
| 3 | * Copyright (c) 2010, Jouni Malinen <j@w1.fi> | |
| 4 | * | |
| 0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
| 6 | * See README for more details. | |
| a149fcc7 JM |
7 | */ |
| 8 | ||
| 9 | #include "utils/includes.h" | |
| ef00c780 | 10 | #include <pcap.h> |
| a149fcc7 JM |
11 | |
| 12 | #include "utils/common.h" | |
| 13 | #include "wlantest.h" | |
| 14 | ||
| 15 | ||
| 16 | int read_cap_file(struct wlantest *wt, const char *fname) | |
| 17 | { | |
| 18 | char errbuf[PCAP_ERRBUF_SIZE]; | |
| 19 | pcap_t *pcap; | |
| 20 | unsigned int count = 0; | |
| 21 | struct pcap_pkthdr *hdr; | |
| 22 | const u_char *data; | |
| 23 | int res; | |
| 350132be | 24 | int dlt; |
| a149fcc7 JM |
25 | |
| 26 | pcap = pcap_open_offline(fname, errbuf); | |
| 27 | if (pcap == NULL) { | |
| 28 | wpa_printf(MSG_ERROR, "Failed to read pcap file '%s': %s", | |
| 29 | fname, errbuf); | |
| 30 | return -1; | |
| 31 | } | |
| 350132be | 32 | dlt = pcap_datalink(pcap); |
| 0f3e4f2a JM |
33 | if (dlt != DLT_IEEE802_11_RADIO && dlt != DLT_PRISM_HEADER && |
| 34 | dlt != DLT_IEEE802_11) { | |
| 350132be JM |
35 | wpa_printf(MSG_ERROR, "Unsupported pcap datalink type: %d", |
| 36 | dlt); | |
| 37 | pcap_close(pcap); | |
| 38 | return -1; | |
| 39 | } | |
| 40 | wpa_printf(MSG_DEBUG, "pcap datalink type: %d", dlt); | |
| a149fcc7 JM |
41 | |
| 42 | for (;;) { | |
| 43 | res = pcap_next_ex(pcap, &hdr, &data); | |
| 44 | if (res == -2) | |
| 45 | break; /* No more packets */ | |
| 46 | if (res == -1) { | |
| 47 | wpa_printf(MSG_INFO, "pcap_next_ex failure: %s", | |
| 48 | pcap_geterr(pcap)); | |
| 49 | break; | |
| 50 | } | |
| 51 | if (res != 1) { | |
| 52 | wpa_printf(MSG_INFO, "Unexpected pcap_next_ex return " | |
| 53 | "value %d", res); | |
| 54 | break; | |
| 55 | } | |
| 56 | ||
| 57 | /* Packet was read without problems */ | |
| 58 | wpa_printf(MSG_EXCESSIVE, "pcap hdr: ts=%d.%06d " | |
| 59 | "len=%u/%u", | |
| 60 | (int) hdr->ts.tv_sec, (int) hdr->ts.tv_usec, | |
| 61 | hdr->caplen, hdr->len); | |
| 64f45d07 JM |
62 | if (wt->write_pcap_dumper) { |
| 63 | wt->write_pcap_time = hdr->ts; | |
| 64 | pcap_dump(wt->write_pcap_dumper, hdr, data); | |
| 65 | } | |
| a149fcc7 JM |
66 | if (hdr->caplen < hdr->len) { |
| 67 | wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame " | |
| 68 | "(%u/%u captured)", | |
| 69 | hdr->caplen, hdr->len); | |
| 70 | continue; | |
| 71 | } | |
| 72 | count++; | |
| 350132be JM |
73 | switch (dlt) { |
| 74 | case DLT_IEEE802_11_RADIO: | |
| 75 | wlantest_process(wt, data, hdr->caplen); | |
| 76 | break; | |
| 77 | case DLT_PRISM_HEADER: | |
| 78 | wlantest_process_prism(wt, data, hdr->caplen); | |
| 79 | break; | |
| 0f3e4f2a JM |
80 | case DLT_IEEE802_11: |
| 81 | wlantest_process_80211(wt, data, hdr->caplen); | |
| 350132be | 82 | } |
| a149fcc7 JM |
83 | } |
| 84 | ||
| 85 | pcap_close(pcap); | |
| 86 | ||
| 87 | wpa_printf(MSG_DEBUG, "Read %s: %u packets", fname, count); | |
| 88 | ||
| 89 | return 0; | |
| 90 | } | |
| 3215df77 JM |
91 | |
| 92 | ||
| 93 | int read_wired_cap_file(struct wlantest *wt, const char *fname) | |
| 94 | { | |
| 95 | char errbuf[PCAP_ERRBUF_SIZE]; | |
| 96 | pcap_t *pcap; | |
| 97 | unsigned int count = 0; | |
| 98 | struct pcap_pkthdr *hdr; | |
| 99 | const u_char *data; | |
| 100 | int res; | |
| 101 | ||
| 102 | pcap = pcap_open_offline(fname, errbuf); | |
| 103 | if (pcap == NULL) { | |
| 104 | wpa_printf(MSG_ERROR, "Failed to read pcap file '%s': %s", | |
| 105 | fname, errbuf); | |
| 106 | return -1; | |
| 107 | } | |
| 108 | ||
| 109 | for (;;) { | |
| 110 | res = pcap_next_ex(pcap, &hdr, &data); | |
| 111 | if (res == -2) | |
| 112 | break; /* No more packets */ | |
| 113 | if (res == -1) { | |
| 114 | wpa_printf(MSG_INFO, "pcap_next_ex failure: %s", | |
| 115 | pcap_geterr(pcap)); | |
| 116 | break; | |
| 117 | } | |
| 118 | if (res != 1) { | |
| 119 | wpa_printf(MSG_INFO, "Unexpected pcap_next_ex return " | |
| 120 | "value %d", res); | |
| 121 | break; | |
| 122 | } | |
| 123 | ||
| 124 | /* Packet was read without problems */ | |
| 125 | wpa_printf(MSG_EXCESSIVE, "pcap hdr: ts=%d.%06d " | |
| 126 | "len=%u/%u", | |
| 127 | (int) hdr->ts.tv_sec, (int) hdr->ts.tv_usec, | |
| 128 | hdr->caplen, hdr->len); | |
| 129 | if (hdr->caplen < hdr->len) { | |
| 130 | wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame " | |
| 131 | "(%u/%u captured)", | |
| 132 | hdr->caplen, hdr->len); | |
| 133 | continue; | |
| 134 | } | |
| 135 | count++; | |
| 136 | wlantest_process_wired(wt, data, hdr->caplen); | |
| 137 | } | |
| 138 | ||
| 139 | pcap_close(pcap); | |
| 140 | ||
| 141 | wpa_printf(MSG_DEBUG, "Read %s: %u packets", fname, count); | |
| 142 | ||
| 143 | return 0; | |
| 144 | } |